Develop Reference

android 9: android.os.FileUriExposedException: [duplicate]

The app is crashing when I'm trying to open a file. It works below Android Nougat, but on Android Nougat it crashes. It only crashes when I try to open a file from the SD card, not from the system partition. Some permission problem?
Sample code:
File file = new File("/storage/emulated/0/test.txt");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "text/*");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent); // Crashes on this line
Log:
android.os.FileUriExposedException:
file:///storage/emulated/0/test.txt exposed beyond app through
Intent.getData()
Edit:
When targeting Android Nougat, file:// URIs are not allowed anymore. We should use content:// URIs instead. However, my app needs to open files in root directories. Any ideas?

If your targetSdkVersion >= 24, then we have to use FileProvider class to give access to the particular file or folder to make them accessible for other apps. We create our own class inheriting FileProvider in order to make sure our FileProvider doesn't conflict with FileProviders declared in imported dependencies as described here.
Steps to replace file:// URI with content:// URI:
Add a FileProvider <provider> tag in AndroidManifest.xml under <application> tag. Specify a unique authority for the android:authorities attribute to avoid conflicts, imported dependencies might specify ${applicationId}.provider and other commonly used authorities.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
...
<application
...
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>
</manifest>
Then create a provider_paths.xml file in res/xml folder. A folder may be needed to be created if it doesn't exist yet. The content of the file is shown below. It describes that we would like to share access to the External Storage at root folder (path=".") with the name external_files.
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>
The final step is to change the line of code below in
Uri photoURI = Uri.fromFile(createImageFile());
to
Uri photoURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", createImageFile());
Edit: If you're using an intent to make the system open your file, you may need to add the following line of code:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Please refer to the full code and solution that have been explained here.

Besides the solution using the FileProvider, there is another way to work around this. Simply put
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
in Application.onCreate(). In this way the VM ignores the file URI exposure.
Method
builder.detectFileUriExposure()
enables the file exposure check, which is also the default behavior if we don't setup a VmPolicy.
I encountered a problem that if I use a content:// URI to send something, some apps just can't understand it. And downgrading the target SDK version is not allowed. In this case my solution is useful.
Update:
As mentioned in the comment, StrictMode is diagnostic tool, and is not supposed to be used for this problem. When I posted this answer a year ago, many apps can only receive File uris. They just crash when I tried to send a FileProvider uri to them. This is fixed in most apps now, so we should go with the FileProvider solution.

If targetSdkVersion is higher than 24, then FileProvider is used to grant access.
Create an xml file(Path: res\xml) provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Add a Provider in AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
If you are using androidx, the FileProvider path should be:
android:name="androidx.core.content.FileProvider"
and replace
Uri uri = Uri.fromFile(fileImagePath);
to
Uri uri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider",fileImagePath);
Edit: While you're including the URI with an Intent make sure to add below line:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
and you are good to go.

If your app targets API 24+, and you still want/need to use file:// intents, you can use hacky way to disable the runtime check:
if(Build.VERSION.SDK_INT>=24){
try{
Method m = StrictMode.class.getMethod("disableDeathOnFileUriExposure");
m.invoke(null);
}catch(Exception e){
e.printStackTrace();
}
}
Method StrictMode.disableDeathOnFileUriExposure is hidden and documented as:
/**
* Used by lame internal apps that haven't done the hard work to get
* themselves off file:// Uris yet.
*/
Problem is that my app is not lame, but rather doesn't want to be crippled by using content:// intents which are not understood by many apps out there. For example, opening mp3 file with content:// scheme offers much fewer apps than when opening same over file:// scheme. I don't want to pay for Google's design faults by limiting my app's functionality.
Google wants developers to use content scheme, but the system is not prepared for this, for years apps were made to use Files not "content", files can be edited and saved back, while files served over content scheme can't be (can they?).

If your targetSdkVersion is 24 or higher, you can not use file: Uri values in Intents on Android 7.0+ devices.
Your choices are:
Drop your targetSdkVersion to 23 or lower, or
Put your content on internal storage, then use FileProvider to make it available selectively to other apps
For example:
Intent i=new Intent(Intent.ACTION_VIEW, FileProvider.getUriForFile(this, AUTHORITY, f));
i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(i);
(from this sample project)

First you need to add a provider to your AndroidManifest
<application
...>
<activity>
....
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.your.package.fileProvider"
android:grantUriPermissions="true"
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
</application>
now create a file in xml resource folder (if using android studio you can hit Alt + Enter after highlighting file_paths and select create a xml resource option)
Next in the file_paths file enter
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path path="Android/data/com.your.package/" name="files_root" />
<external-path path="." name="external_storage_root" />
</paths>
This example is for external-path you can refere here for more options.
This will allow you to share files which are in that folder and its sub-folder.
Now all that's left is to create the intent as follows:
MimeTypeMap mime = MimeTypeMap.getSingleton();
String ext = newFile.getName().substring(newFile.getName().lastIndexOf(".") + 1);
String type = mime.getMimeTypeFromExtension(ext);
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(getContext(), "com.your.package.fileProvider", newFile);
intent.setDataAndType(contentUri, type);
} else {
intent.setDataAndType(Uri.fromFile(newFile), type);
}
startActivityForResult(intent, ACTIVITY_VIEW_ATTACHMENT);
} catch (ActivityNotFoundException anfe) {
Toast.makeText(getContext(), "No activity found to open this attachment.", Toast.LENGTH_LONG).show();
}
EDIT: I added the root folder of the sd card in the file_paths. I have tested this code and it does work.

My Solution was to 'Uri.parse' the File Path as String, instead of using Uri.fromFile().
String storage = Environment.getExternalStorageDirectory().toString() + "/test.txt";
File file = new File(storage);
Uri uri;
if (Build.VERSION.SDK_INT < 24) {
uri = Uri.fromFile(file);
} else {
uri = Uri.parse(file.getPath()); // My work-around for SDKs up to 29.
}
Intent viewFile = new Intent(Intent.ACTION_VIEW);
viewFile.setDataAndType(uri, "text/plain");
startActivity(viewFile);
Seems that fromFile() uses A file pointer, which I suppose could be insecure when memory addresses are exposed to all apps. But A file path String never hurt anybody, so it works without throwing FileUriExposedException.
Tested on API levels 9 to 29! Successfully opens the text file for editing in another app. Does not require FileProvider, nor the Android Support Library at all. And this will not work right on API level 30(Android 11) or newer, as getExternalStorageDirectory() has been deprecated.

#palash k answer is correct and worked for internal storage files, but in my case I want to open files from external storage also, my app crashed when open file from external storage like sdcard and usb, but I manage to solve the issue by modifying provider_paths.xml from the accepted answer
change the provider_paths.xml like below
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path path="Android/data/${applicationId}/" name="files_root" />
<root-path
name="root"
path="/" />
</paths>
and in java class(No change as the accepted answer just a small edit)
Uri uri=FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID+".provider", File)
This help me to fix the crash for files from external storages, Hope this will help some one having same issue as mine
:)

Just paste the below code in activity onCreate().
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.
Happy coding :-)

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Using the fileProvider is the way to go.
But you can use this simple workaround:
WARNING: It will be fixed in next Android release -
https://issuetracker.google.com/issues/37122890#comment4
replace:
startActivity(intent);
by
startActivity(Intent.createChooser(intent, "Your title"));

I used Palash's answer given above but it was somewhat incomplete, I had to provide permission like this
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
uri = FileProvider.getUriForFile(this, getPackageName() + ".provider", new File(path));
List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : resInfoList) {
String packageName = resolveInfo.activityInfo.packageName;
grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
}else {
uri = Uri.fromFile(new File(path));
}
intent.setDataAndType(uri, "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Here my solution:
in Manifest.xml
<application
android:name=".main.MainApp"
android:allowBackup="true"
android:icon="#drawable/ic_app"
android:label="#string/application_name"
android:logo="#drawable/ic_app_logo"
android:theme="#style/MainAppBaseTheme">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
in res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
in my fragment I has the next code:
Uri myPhotoFileUri = FileProvider.getUriForFile(getActivity(), getActivity().getApplicationContext().getPackageName() + ".provider", myPhotoFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.putExtra(MediaStore.EXTRA_OUTPUT, myPhotoFileUri);
Тhat's all you need.
Also not need to create
public class GenericFileProvider extends FileProvider {}
I test on Android 5.0, 6.0 and Android 9.0 and it's success work.

add this two line in onCreate
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
Share method
File dir = new File(Environment.getExternalStorageDirectory(), "ColorStory");
File imgFile = new File(dir, "0.png");
Intent sendIntent = new Intent(Intent.ACTION_VIEW);
sendIntent.setType("image/*");
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + imgFile));
sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(sendIntent, "Share images..."));

For downloading pdf from server , add below code in your service class. Hope this is helpful for you.
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName + ".pdf");
intent = new Intent(Intent.ACTION_VIEW);
//Log.e("pathOpen", file.getPath());
Uri contentUri;
contentUri = Uri.fromFile(file);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= 24) {
Uri apkURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", file);
intent.setDataAndType(apkURI, "application/pdf");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
intent.setDataAndType(contentUri, "application/pdf");
}
And yes , don't forget to add permissions and provider in your manifest.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>

I don't know why, I did everything exactly the same as Pkosta (https://stackoverflow.com/a/38858040 ) but kept getting error:
java.lang.SecurityException: Permission Denial: opening provider redacted from ProcessRecord{redacted} (redacted) that is not exported from uid redacted
I wasted hours on this issue. The culprit? Kotlin.
val playIntent = Intent(Intent.ACTION_VIEW, uri)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
intent was actually setting getIntent().addFlags instead of operating on my newly declared playIntent.

As of Android N, in order to work around this issue, you need to use the FileProvider API
There are 3 main steps here as mentioned below
Step 1: Manifest Entry
<manifest ...>
<application ...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
</application>
</manifest>
Step 2: Create XML file res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Step 3: Code changes
File file = ...;
Intent install = new Intent(Intent.ACTION_VIEW);
install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
// Old Approach
install.setDataAndType(Uri.fromFile(file), mimeType);
// End Old approach
// New Approach
Uri apkURI = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", file);
install.setDataAndType(apkURI, mimeType);
install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
// End New Approach
context.startActivity(install);

I spent almost a day trying to figure out why I was getting this exception. After lots of struggle, this config worked perfectly (Kotlin):
AndroidManifest.xml
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.lomza.moviesroom.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<files-path name="movies_csv_files" path="."/>
</paths>
Intent itself
fun goToFileIntent(context: Context, file: File): Intent {
val intent = Intent(Intent.ACTION_VIEW)
val contentUri = FileProvider.getUriForFile(context, "${context.packageName}.fileprovider", file)
val mimeType = context.contentResolver.getType(contentUri)
intent.setDataAndType(contentUri, mimeType)
intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
return intent
}
I explain the whole process here.

I have just done following if android version > 24
File fl = new File(url);
Uri uri = Uri.fromFile(fl);
Intent intent = new Intent(Intent.ACTION_VIEW);
if (android.os.Build.VERSION.SDK_INT>=24)
{
Context context = getApplicationContext();
uri = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", fl);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
intent.setDataAndType(uri, mimetype);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Following this link then https://medium.com/#ali.muzaffar/what-is-android-os-fileuriexposedexception-and-what-you-can-do-about-it-70b9eb17c6d0#.54odzsnk4

#Pkosta 's answer is one way of doing this.
Besides using FileProvider, you can also insert the file into MediaStore (especially for image and video files), because files in MediaStore are accessible to every app:
The MediaStore is primarily aimed at video, audio and image MIME types, however beginning with Android 3.0 (API level 11) it can also store non-media types (see MediaStore.Files for more info). Files can be inserted into the MediaStore using scanFile() after which a content:// style Uri suitable for sharing is passed to the provided onScanCompleted() callback. Note that once added to the system MediaStore the content is accessible to any app on the device.
For example, you can insert a video file to MediaStore like this:
ContentValues values = new ContentValues();
values.put(MediaStore.Video.Media.DATA, videoFilePath);
Uri contentUri = context.getContentResolver().insert(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, values);
contentUri is like content://media/external/video/media/183473, which can be passed directly to Intent.putExtra:
intent.setType("video/*");
intent.putExtra(Intent.EXTRA_STREAM, contentUri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
activity.startActivity(intent);
This works for me, and save the hassles of using FileProvider.

i put this method so imageuri path easily get in content.
enter code here
public Uri getImageUri(Context context, Bitmap inImage)
{
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.PNG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(context.getContentResolver(),
inImage, "Title", null);
return Uri.parse(path);
}

I know this is a pretty old question but this answer is for future viewers. So I've encountered a similar problem and after researching, I've found an alternative to this approach.
Your Intent here
for eg: To view your image from your path in Kotlin
val intent = Intent()
intent.setAction(Intent.ACTION_VIEW)
val file = File(currentUri)
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
val contentURI = getContentUri(context!!, file.absolutePath)
intent.setDataAndType(contentURI,"image/*")
startActivity(intent)
Main Function below
private fun getContentUri(context:Context, absPath:String):Uri? {
val cursor = context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
arrayOf<String>(MediaStore.Images.Media._ID),
MediaStore.Images.Media.DATA + "=? ",
arrayOf<String>(absPath), null)
if (cursor != null && cursor.moveToFirst())
{
val id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID))
return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, Integer.toString(id))
}
else if (!absPath.isEmpty())
{
val values = ContentValues()
values.put(MediaStore.Images.Media.DATA, absPath)
return context.getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
}
else
{
return null
}
}
Likewise, instead of an image, you can use any other file format like pdf and in my case, it worked just fine

I wanted to share images from the app's scoped storage and that's where I was getting this exception. Searched for hours and then, at last, I found this blog.
It's a bit long so I am sharing the gist here but I will recommend you to go through it.
The bottom line is you can't share anything from the app's scoped storage. Also in Android 12, the intent chooser bottom dialog shows the preview of the image you are sharing which is super cool by the way, but it can't load the preview from the scoped storage URI.
The solution is to create a copy of the file you 'intent' to share in the cache directory.
val cachePath = File(externalCacheDir, "my_images/")
cachePath.mkdirs()
val bitmap = loadImageFromStorage(currentQuote.bookId)
val file = File(cachePath, "cache.png")
val fileOutputStream: FileOutputStream
try {
fileOutputStream = FileOutputStream(file)
bitmap?.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream)
fileOutputStream.flush()
fileOutputStream.close()
} catch (e: FileNotFoundException) {
e.printStackTrace()
} catch (e: IOException) {
e.printStackTrace()
}
val cacheImageUri: Uri = FileProvider.getUriForFile(this, applicationContext.packageName + ".provider", file)
val intent = Intent(Intent.ACTION_SEND).apply {
clipData = ClipData.newRawUri(null, cacheImageUri)
putExtra(Intent.EXTRA_STREAM, cacheImageUri)
type = "image/ *"
addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}
startActivity(Intent.createChooser(intent, null))
And this is how I am loading file from scoped storage
fun Context.loadImageFromStorage(path: String): Bitmap? {
try {
val file = getFile(path)
val bitmap = BitmapFactory.decodeStream(FileInputStream(file))
return bitmap
} catch (e: Exception) {
e.printStackTrace()
//Returning file from public storage in case the file is stored in public storage
return BitmapFactory.decodeStream(FileInputStream(File(path)))
}
return null
}
fun Context.getFile(path: String): File? {
val cw = ContextWrapper(this)
val directory = cw.getDir("image_dir", Context.MODE_PRIVATE)
if (!directory.exists())
directory.mkdir()
try {
val fileName = directory.absolutePath + "/" + path.split("/").last()
return File(fileName)
} catch (e: Exception) {
e.printStackTrace()
}
return null
}
Lastly, don't forget to update your provider_paths.xml file
<external-cache-path name="external_cache" path="." />
<external-cache-path name="external_files" path="my_images/"/>

Xamarin.Android
Note: The path xml/provider_paths.xml (.axml) couldn't be resolved, even after making the xml folder under Resources (maybe it can be put in an existing location like Values, didn't try), so I resorted to this which works for now. Testing showed that it only needs to be called once per application run (which makes sense being that it changes the operational state of the host VM).
Note: xml needs to be capitalized, so Resources/Xml/provider_paths.xml
Java.Lang.ClassLoader cl = _this.Context.ClassLoader;
Java.Lang.Class strictMode = cl.LoadClass("android.os.StrictMode");
System.IntPtr ptrStrictMode = JNIEnv.FindClass("android/os/StrictMode");
var method = JNIEnv.GetStaticMethodID(ptrStrictMode, "disableDeathOnFileUriExposure", "()V");
JNIEnv.CallStaticVoidMethod(strictMode.Handle, method);

This works
val uri = if (Build.VERSION.SDK_INT < 24) Uri.fromFile(file) else Uri.parse(file.path)
val shareIntent = Intent().apply {
action = Intent.ACTION_SEND
type = "application/pdf"
putExtra(Intent.EXTRA_STREAM, uri)
putExtra(
Intent.EXTRA_SUBJECT,
"Purchase Bill..."
)
putExtra(
Intent.EXTRA_TEXT,
"Sharing Bill purchase items..."
)
}
startActivity(Intent.createChooser(shareIntent, "Share Via"))

Simply let it ignore the URI Exposure...
Add it after on create
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());

Delphi Use android fileprovider to send intent to open and image file with the default android gallery [duplicate]

The app is crashing when I'm trying to open a file. It works below Android Nougat, but on Android Nougat it crashes. It only crashes when I try to open a file from the SD card, not from the system partition. Some permission problem?
Sample code:
File file = new File("/storage/emulated/0/test.txt");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "text/*");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent); // Crashes on this line
Log:
android.os.FileUriExposedException:
file:///storage/emulated/0/test.txt exposed beyond app through
Intent.getData()
Edit:
When targeting Android Nougat, file:// URIs are not allowed anymore. We should use content:// URIs instead. However, my app needs to open files in root directories. Any ideas?

If your targetSdkVersion >= 24, then we have to use FileProvider class to give access to the particular file or folder to make them accessible for other apps. We create our own class inheriting FileProvider in order to make sure our FileProvider doesn't conflict with FileProviders declared in imported dependencies as described here.
Steps to replace file:// URI with content:// URI:
Add a FileProvider <provider> tag in AndroidManifest.xml under <application> tag. Specify a unique authority for the android:authorities attribute to avoid conflicts, imported dependencies might specify ${applicationId}.provider and other commonly used authorities.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
...
<application
...
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>
</manifest>
Then create a provider_paths.xml file in res/xml folder. A folder may be needed to be created if it doesn't exist yet. The content of the file is shown below. It describes that we would like to share access to the External Storage at root folder (path=".") with the name external_files.
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>
The final step is to change the line of code below in
Uri photoURI = Uri.fromFile(createImageFile());
to
Uri photoURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", createImageFile());
Edit: If you're using an intent to make the system open your file, you may need to add the following line of code:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Please refer to the full code and solution that have been explained here.

Besides the solution using the FileProvider, there is another way to work around this. Simply put
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
in Application.onCreate(). In this way the VM ignores the file URI exposure.
Method
builder.detectFileUriExposure()
enables the file exposure check, which is also the default behavior if we don't setup a VmPolicy.
I encountered a problem that if I use a content:// URI to send something, some apps just can't understand it. And downgrading the target SDK version is not allowed. In this case my solution is useful.
Update:
As mentioned in the comment, StrictMode is diagnostic tool, and is not supposed to be used for this problem. When I posted this answer a year ago, many apps can only receive File uris. They just crash when I tried to send a FileProvider uri to them. This is fixed in most apps now, so we should go with the FileProvider solution.

If targetSdkVersion is higher than 24, then FileProvider is used to grant access.
Create an xml file(Path: res\xml) provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Add a Provider in AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
If you are using androidx, the FileProvider path should be:
android:name="androidx.core.content.FileProvider"
and replace
Uri uri = Uri.fromFile(fileImagePath);
to
Uri uri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider",fileImagePath);
Edit: While you're including the URI with an Intent make sure to add below line:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
and you are good to go.

If your app targets API 24+, and you still want/need to use file:// intents, you can use hacky way to disable the runtime check:
if(Build.VERSION.SDK_INT>=24){
try{
Method m = StrictMode.class.getMethod("disableDeathOnFileUriExposure");
m.invoke(null);
}catch(Exception e){
e.printStackTrace();
}
}
Method StrictMode.disableDeathOnFileUriExposure is hidden and documented as:
/**
* Used by lame internal apps that haven't done the hard work to get
* themselves off file:// Uris yet.
*/
Problem is that my app is not lame, but rather doesn't want to be crippled by using content:// intents which are not understood by many apps out there. For example, opening mp3 file with content:// scheme offers much fewer apps than when opening same over file:// scheme. I don't want to pay for Google's design faults by limiting my app's functionality.
Google wants developers to use content scheme, but the system is not prepared for this, for years apps were made to use Files not "content", files can be edited and saved back, while files served over content scheme can't be (can they?).

If your targetSdkVersion is 24 or higher, you can not use file: Uri values in Intents on Android 7.0+ devices.
Your choices are:
Drop your targetSdkVersion to 23 or lower, or
Put your content on internal storage, then use FileProvider to make it available selectively to other apps
For example:
Intent i=new Intent(Intent.ACTION_VIEW, FileProvider.getUriForFile(this, AUTHORITY, f));
i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(i);
(from this sample project)

First you need to add a provider to your AndroidManifest
<application
...>
<activity>
....
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.your.package.fileProvider"
android:grantUriPermissions="true"
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
</application>
now create a file in xml resource folder (if using android studio you can hit Alt + Enter after highlighting file_paths and select create a xml resource option)
Next in the file_paths file enter
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path path="Android/data/com.your.package/" name="files_root" />
<external-path path="." name="external_storage_root" />
</paths>
This example is for external-path you can refere here for more options.
This will allow you to share files which are in that folder and its sub-folder.
Now all that's left is to create the intent as follows:
MimeTypeMap mime = MimeTypeMap.getSingleton();
String ext = newFile.getName().substring(newFile.getName().lastIndexOf(".") + 1);
String type = mime.getMimeTypeFromExtension(ext);
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(getContext(), "com.your.package.fileProvider", newFile);
intent.setDataAndType(contentUri, type);
} else {
intent.setDataAndType(Uri.fromFile(newFile), type);
}
startActivityForResult(intent, ACTIVITY_VIEW_ATTACHMENT);
} catch (ActivityNotFoundException anfe) {
Toast.makeText(getContext(), "No activity found to open this attachment.", Toast.LENGTH_LONG).show();
}
EDIT: I added the root folder of the sd card in the file_paths. I have tested this code and it does work.

My Solution was to 'Uri.parse' the File Path as String, instead of using Uri.fromFile().
String storage = Environment.getExternalStorageDirectory().toString() + "/test.txt";
File file = new File(storage);
Uri uri;
if (Build.VERSION.SDK_INT < 24) {
uri = Uri.fromFile(file);
} else {
uri = Uri.parse(file.getPath()); // My work-around for SDKs up to 29.
}
Intent viewFile = new Intent(Intent.ACTION_VIEW);
viewFile.setDataAndType(uri, "text/plain");
startActivity(viewFile);
Seems that fromFile() uses A file pointer, which I suppose could be insecure when memory addresses are exposed to all apps. But A file path String never hurt anybody, so it works without throwing FileUriExposedException.
Tested on API levels 9 to 29! Successfully opens the text file for editing in another app. Does not require FileProvider, nor the Android Support Library at all. And this will not work right on API level 30(Android 11) or newer, as getExternalStorageDirectory() has been deprecated.

#palash k answer is correct and worked for internal storage files, but in my case I want to open files from external storage also, my app crashed when open file from external storage like sdcard and usb, but I manage to solve the issue by modifying provider_paths.xml from the accepted answer
change the provider_paths.xml like below
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path path="Android/data/${applicationId}/" name="files_root" />
<root-path
name="root"
path="/" />
</paths>
and in java class(No change as the accepted answer just a small edit)
Uri uri=FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID+".provider", File)
This help me to fix the crash for files from external storages, Hope this will help some one having same issue as mine
:)

Just paste the below code in activity onCreate().
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.
Happy coding :-)

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Using the fileProvider is the way to go.
But you can use this simple workaround:
WARNING: It will be fixed in next Android release -
https://issuetracker.google.com/issues/37122890#comment4
replace:
startActivity(intent);
by
startActivity(Intent.createChooser(intent, "Your title"));

I used Palash's answer given above but it was somewhat incomplete, I had to provide permission like this
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
uri = FileProvider.getUriForFile(this, getPackageName() + ".provider", new File(path));
List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : resInfoList) {
String packageName = resolveInfo.activityInfo.packageName;
grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
}else {
uri = Uri.fromFile(new File(path));
}
intent.setDataAndType(uri, "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Here my solution:
in Manifest.xml
<application
android:name=".main.MainApp"
android:allowBackup="true"
android:icon="#drawable/ic_app"
android:label="#string/application_name"
android:logo="#drawable/ic_app_logo"
android:theme="#style/MainAppBaseTheme">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
in res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
in my fragment I has the next code:
Uri myPhotoFileUri = FileProvider.getUriForFile(getActivity(), getActivity().getApplicationContext().getPackageName() + ".provider", myPhotoFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.putExtra(MediaStore.EXTRA_OUTPUT, myPhotoFileUri);
Тhat's all you need.
Also not need to create
public class GenericFileProvider extends FileProvider {}
I test on Android 5.0, 6.0 and Android 9.0 and it's success work.

add this two line in onCreate
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
Share method
File dir = new File(Environment.getExternalStorageDirectory(), "ColorStory");
File imgFile = new File(dir, "0.png");
Intent sendIntent = new Intent(Intent.ACTION_VIEW);
sendIntent.setType("image/*");
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + imgFile));
sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(sendIntent, "Share images..."));

For downloading pdf from server , add below code in your service class. Hope this is helpful for you.
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName + ".pdf");
intent = new Intent(Intent.ACTION_VIEW);
//Log.e("pathOpen", file.getPath());
Uri contentUri;
contentUri = Uri.fromFile(file);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= 24) {
Uri apkURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", file);
intent.setDataAndType(apkURI, "application/pdf");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
intent.setDataAndType(contentUri, "application/pdf");
}
And yes , don't forget to add permissions and provider in your manifest.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>

I don't know why, I did everything exactly the same as Pkosta (https://stackoverflow.com/a/38858040 ) but kept getting error:
java.lang.SecurityException: Permission Denial: opening provider redacted from ProcessRecord{redacted} (redacted) that is not exported from uid redacted
I wasted hours on this issue. The culprit? Kotlin.
val playIntent = Intent(Intent.ACTION_VIEW, uri)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
intent was actually setting getIntent().addFlags instead of operating on my newly declared playIntent.

As of Android N, in order to work around this issue, you need to use the FileProvider API
There are 3 main steps here as mentioned below
Step 1: Manifest Entry
<manifest ...>
<application ...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
</application>
</manifest>
Step 2: Create XML file res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Step 3: Code changes
File file = ...;
Intent install = new Intent(Intent.ACTION_VIEW);
install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
// Old Approach
install.setDataAndType(Uri.fromFile(file), mimeType);
// End Old approach
// New Approach
Uri apkURI = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", file);
install.setDataAndType(apkURI, mimeType);
install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
// End New Approach
context.startActivity(install);

I spent almost a day trying to figure out why I was getting this exception. After lots of struggle, this config worked perfectly (Kotlin):
AndroidManifest.xml
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.lomza.moviesroom.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<files-path name="movies_csv_files" path="."/>
</paths>
Intent itself
fun goToFileIntent(context: Context, file: File): Intent {
val intent = Intent(Intent.ACTION_VIEW)
val contentUri = FileProvider.getUriForFile(context, "${context.packageName}.fileprovider", file)
val mimeType = context.contentResolver.getType(contentUri)
intent.setDataAndType(contentUri, mimeType)
intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
return intent
}
I explain the whole process here.

I have just done following if android version > 24
File fl = new File(url);
Uri uri = Uri.fromFile(fl);
Intent intent = new Intent(Intent.ACTION_VIEW);
if (android.os.Build.VERSION.SDK_INT>=24)
{
Context context = getApplicationContext();
uri = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", fl);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
intent.setDataAndType(uri, mimetype);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Following this link then https://medium.com/#ali.muzaffar/what-is-android-os-fileuriexposedexception-and-what-you-can-do-about-it-70b9eb17c6d0#.54odzsnk4

#Pkosta 's answer is one way of doing this.
Besides using FileProvider, you can also insert the file into MediaStore (especially for image and video files), because files in MediaStore are accessible to every app:
The MediaStore is primarily aimed at video, audio and image MIME types, however beginning with Android 3.0 (API level 11) it can also store non-media types (see MediaStore.Files for more info). Files can be inserted into the MediaStore using scanFile() after which a content:// style Uri suitable for sharing is passed to the provided onScanCompleted() callback. Note that once added to the system MediaStore the content is accessible to any app on the device.
For example, you can insert a video file to MediaStore like this:
ContentValues values = new ContentValues();
values.put(MediaStore.Video.Media.DATA, videoFilePath);
Uri contentUri = context.getContentResolver().insert(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, values);
contentUri is like content://media/external/video/media/183473, which can be passed directly to Intent.putExtra:
intent.setType("video/*");
intent.putExtra(Intent.EXTRA_STREAM, contentUri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
activity.startActivity(intent);
This works for me, and save the hassles of using FileProvider.

i put this method so imageuri path easily get in content.
enter code here
public Uri getImageUri(Context context, Bitmap inImage)
{
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.PNG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(context.getContentResolver(),
inImage, "Title", null);
return Uri.parse(path);
}

I know this is a pretty old question but this answer is for future viewers. So I've encountered a similar problem and after researching, I've found an alternative to this approach.
Your Intent here
for eg: To view your image from your path in Kotlin
val intent = Intent()
intent.setAction(Intent.ACTION_VIEW)
val file = File(currentUri)
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
val contentURI = getContentUri(context!!, file.absolutePath)
intent.setDataAndType(contentURI,"image/*")
startActivity(intent)
Main Function below
private fun getContentUri(context:Context, absPath:String):Uri? {
val cursor = context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
arrayOf<String>(MediaStore.Images.Media._ID),
MediaStore.Images.Media.DATA + "=? ",
arrayOf<String>(absPath), null)
if (cursor != null && cursor.moveToFirst())
{
val id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID))
return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, Integer.toString(id))
}
else if (!absPath.isEmpty())
{
val values = ContentValues()
values.put(MediaStore.Images.Media.DATA, absPath)
return context.getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
}
else
{
return null
}
}
Likewise, instead of an image, you can use any other file format like pdf and in my case, it worked just fine

I wanted to share images from the app's scoped storage and that's where I was getting this exception. Searched for hours and then, at last, I found this blog.
It's a bit long so I am sharing the gist here but I will recommend you to go through it.
The bottom line is you can't share anything from the app's scoped storage. Also in Android 12, the intent chooser bottom dialog shows the preview of the image you are sharing which is super cool by the way, but it can't load the preview from the scoped storage URI.
The solution is to create a copy of the file you 'intent' to share in the cache directory.
val cachePath = File(externalCacheDir, "my_images/")
cachePath.mkdirs()
val bitmap = loadImageFromStorage(currentQuote.bookId)
val file = File(cachePath, "cache.png")
val fileOutputStream: FileOutputStream
try {
fileOutputStream = FileOutputStream(file)
bitmap?.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream)
fileOutputStream.flush()
fileOutputStream.close()
} catch (e: FileNotFoundException) {
e.printStackTrace()
} catch (e: IOException) {
e.printStackTrace()
}
val cacheImageUri: Uri = FileProvider.getUriForFile(this, applicationContext.packageName + ".provider", file)
val intent = Intent(Intent.ACTION_SEND).apply {
clipData = ClipData.newRawUri(null, cacheImageUri)
putExtra(Intent.EXTRA_STREAM, cacheImageUri)
type = "image/ *"
addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}
startActivity(Intent.createChooser(intent, null))
And this is how I am loading file from scoped storage
fun Context.loadImageFromStorage(path: String): Bitmap? {
try {
val file = getFile(path)
val bitmap = BitmapFactory.decodeStream(FileInputStream(file))
return bitmap
} catch (e: Exception) {
e.printStackTrace()
//Returning file from public storage in case the file is stored in public storage
return BitmapFactory.decodeStream(FileInputStream(File(path)))
}
return null
}
fun Context.getFile(path: String): File? {
val cw = ContextWrapper(this)
val directory = cw.getDir("image_dir", Context.MODE_PRIVATE)
if (!directory.exists())
directory.mkdir()
try {
val fileName = directory.absolutePath + "/" + path.split("/").last()
return File(fileName)
} catch (e: Exception) {
e.printStackTrace()
}
return null
}
Lastly, don't forget to update your provider_paths.xml file
<external-cache-path name="external_cache" path="." />
<external-cache-path name="external_files" path="my_images/"/>

Xamarin.Android
Note: The path xml/provider_paths.xml (.axml) couldn't be resolved, even after making the xml folder under Resources (maybe it can be put in an existing location like Values, didn't try), so I resorted to this which works for now. Testing showed that it only needs to be called once per application run (which makes sense being that it changes the operational state of the host VM).
Note: xml needs to be capitalized, so Resources/Xml/provider_paths.xml
Java.Lang.ClassLoader cl = _this.Context.ClassLoader;
Java.Lang.Class strictMode = cl.LoadClass("android.os.StrictMode");
System.IntPtr ptrStrictMode = JNIEnv.FindClass("android/os/StrictMode");
var method = JNIEnv.GetStaticMethodID(ptrStrictMode, "disableDeathOnFileUriExposure", "()V");
JNIEnv.CallStaticVoidMethod(strictMode.Handle, method);

This works
val uri = if (Build.VERSION.SDK_INT < 24) Uri.fromFile(file) else Uri.parse(file.path)
val shareIntent = Intent().apply {
action = Intent.ACTION_SEND
type = "application/pdf"
putExtra(Intent.EXTRA_STREAM, uri)
putExtra(
Intent.EXTRA_SUBJECT,
"Purchase Bill..."
)
putExtra(
Intent.EXTRA_TEXT,
"Sharing Bill purchase items..."
)
}
startActivity(Intent.createChooser(shareIntent, "Share Via"))

Simply let it ignore the URI Exposure...
Add it after on create
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());

Android app crashes while trying to open file from Downloads [duplicate]

The app is crashing when I'm trying to open a file. It works below Android Nougat, but on Android Nougat it crashes. It only crashes when I try to open a file from the SD card, not from the system partition. Some permission problem?
Sample code:
File file = new File("/storage/emulated/0/test.txt");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file), "text/*");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent); // Crashes on this line
Log:
android.os.FileUriExposedException:
file:///storage/emulated/0/test.txt exposed beyond app through
Intent.getData()
Edit:
When targeting Android Nougat, file:// URIs are not allowed anymore. We should use content:// URIs instead. However, my app needs to open files in root directories. Any ideas?

If your targetSdkVersion >= 24, then we have to use FileProvider class to give access to the particular file or folder to make them accessible for other apps. We create our own class inheriting FileProvider in order to make sure our FileProvider doesn't conflict with FileProviders declared in imported dependencies as described here.
Steps to replace file:// URI with content:// URI:
Add a FileProvider <provider> tag in AndroidManifest.xml under <application> tag. Specify a unique authority for the android:authorities attribute to avoid conflicts, imported dependencies might specify ${applicationId}.provider and other commonly used authorities.
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
...
<application
...
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>
</manifest>
Then create a provider_paths.xml file in res/xml folder. A folder may be needed to be created if it doesn't exist yet. The content of the file is shown below. It describes that we would like to share access to the External Storage at root folder (path=".") with the name external_files.
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path name="external_files" path="."/>
</paths>
The final step is to change the line of code below in
Uri photoURI = Uri.fromFile(createImageFile());
to
Uri photoURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", createImageFile());
Edit: If you're using an intent to make the system open your file, you may need to add the following line of code:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Please refer to the full code and solution that have been explained here.

Besides the solution using the FileProvider, there is another way to work around this. Simply put
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
in Application.onCreate(). In this way the VM ignores the file URI exposure.
Method
builder.detectFileUriExposure()
enables the file exposure check, which is also the default behavior if we don't setup a VmPolicy.
I encountered a problem that if I use a content:// URI to send something, some apps just can't understand it. And downgrading the target SDK version is not allowed. In this case my solution is useful.
Update:
As mentioned in the comment, StrictMode is diagnostic tool, and is not supposed to be used for this problem. When I posted this answer a year ago, many apps can only receive File uris. They just crash when I tried to send a FileProvider uri to them. This is fixed in most apps now, so we should go with the FileProvider solution.

If targetSdkVersion is higher than 24, then FileProvider is used to grant access.
Create an xml file(Path: res\xml) provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Add a Provider in AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
If you are using androidx, the FileProvider path should be:
android:name="androidx.core.content.FileProvider"
and replace
Uri uri = Uri.fromFile(fileImagePath);
to
Uri uri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID + ".provider",fileImagePath);
Edit: While you're including the URI with an Intent make sure to add below line:
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
and you are good to go.

If your app targets API 24+, and you still want/need to use file:// intents, you can use hacky way to disable the runtime check:
if(Build.VERSION.SDK_INT>=24){
try{
Method m = StrictMode.class.getMethod("disableDeathOnFileUriExposure");
m.invoke(null);
}catch(Exception e){
e.printStackTrace();
}
}
Method StrictMode.disableDeathOnFileUriExposure is hidden and documented as:
/**
* Used by lame internal apps that haven't done the hard work to get
* themselves off file:// Uris yet.
*/
Problem is that my app is not lame, but rather doesn't want to be crippled by using content:// intents which are not understood by many apps out there. For example, opening mp3 file with content:// scheme offers much fewer apps than when opening same over file:// scheme. I don't want to pay for Google's design faults by limiting my app's functionality.
Google wants developers to use content scheme, but the system is not prepared for this, for years apps were made to use Files not "content", files can be edited and saved back, while files served over content scheme can't be (can they?).

If your targetSdkVersion is 24 or higher, you can not use file: Uri values in Intents on Android 7.0+ devices.
Your choices are:
Drop your targetSdkVersion to 23 or lower, or
Put your content on internal storage, then use FileProvider to make it available selectively to other apps
For example:
Intent i=new Intent(Intent.ACTION_VIEW, FileProvider.getUriForFile(this, AUTHORITY, f));
i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(i);
(from this sample project)

First you need to add a provider to your AndroidManifest
<application
...>
<activity>
....
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.your.package.fileProvider"
android:grantUriPermissions="true"
android:exported="false">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
</application>
now create a file in xml resource folder (if using android studio you can hit Alt + Enter after highlighting file_paths and select create a xml resource option)
Next in the file_paths file enter
<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-path path="Android/data/com.your.package/" name="files_root" />
<external-path path="." name="external_storage_root" />
</paths>
This example is for external-path you can refere here for more options.
This will allow you to share files which are in that folder and its sub-folder.
Now all that's left is to create the intent as follows:
MimeTypeMap mime = MimeTypeMap.getSingleton();
String ext = newFile.getName().substring(newFile.getName().lastIndexOf(".") + 1);
String type = mime.getMimeTypeFromExtension(ext);
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Uri contentUri = FileProvider.getUriForFile(getContext(), "com.your.package.fileProvider", newFile);
intent.setDataAndType(contentUri, type);
} else {
intent.setDataAndType(Uri.fromFile(newFile), type);
}
startActivityForResult(intent, ACTIVITY_VIEW_ATTACHMENT);
} catch (ActivityNotFoundException anfe) {
Toast.makeText(getContext(), "No activity found to open this attachment.", Toast.LENGTH_LONG).show();
}
EDIT: I added the root folder of the sd card in the file_paths. I have tested this code and it does work.

My Solution was to 'Uri.parse' the File Path as String, instead of using Uri.fromFile().
String storage = Environment.getExternalStorageDirectory().toString() + "/test.txt";
File file = new File(storage);
Uri uri;
if (Build.VERSION.SDK_INT < 24) {
uri = Uri.fromFile(file);
} else {
uri = Uri.parse(file.getPath()); // My work-around for SDKs up to 29.
}
Intent viewFile = new Intent(Intent.ACTION_VIEW);
viewFile.setDataAndType(uri, "text/plain");
startActivity(viewFile);
Seems that fromFile() uses A file pointer, which I suppose could be insecure when memory addresses are exposed to all apps. But A file path String never hurt anybody, so it works without throwing FileUriExposedException.
Tested on API levels 9 to 29! Successfully opens the text file for editing in another app. Does not require FileProvider, nor the Android Support Library at all. And this will not work right on API level 30(Android 11) or newer, as getExternalStorageDirectory() has been deprecated.

#palash k answer is correct and worked for internal storage files, but in my case I want to open files from external storage also, my app crashed when open file from external storage like sdcard and usb, but I manage to solve the issue by modifying provider_paths.xml from the accepted answer
change the provider_paths.xml like below
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path path="Android/data/${applicationId}/" name="files_root" />
<root-path
name="root"
path="/" />
</paths>
and in java class(No change as the accepted answer just a small edit)
Uri uri=FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID+".provider", File)
This help me to fix the crash for files from external storages, Hope this will help some one having same issue as mine
:)

Just paste the below code in activity onCreate().
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.
Happy coding :-)

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Using the fileProvider is the way to go.
But you can use this simple workaround:
WARNING: It will be fixed in next Android release -
https://issuetracker.google.com/issues/37122890#comment4
replace:
startActivity(intent);
by
startActivity(Intent.createChooser(intent, "Your title"));

I used Palash's answer given above but it was somewhat incomplete, I had to provide permission like this
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
uri = FileProvider.getUriForFile(this, getPackageName() + ".provider", new File(path));
List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
for (ResolveInfo resolveInfo : resInfoList) {
String packageName = resolveInfo.activityInfo.packageName;
grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
}else {
uri = Uri.fromFile(new File(path));
}
intent.setDataAndType(uri, "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

Just paste the below code in Activity onCreate():
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
It will ignore URI exposure.

Here my solution:
in Manifest.xml
<application
android:name=".main.MainApp"
android:allowBackup="true"
android:icon="#drawable/ic_app"
android:label="#string/application_name"
android:logo="#drawable/ic_app_logo"
android:theme="#style/MainAppBaseTheme">
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
in res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
in my fragment I has the next code:
Uri myPhotoFileUri = FileProvider.getUriForFile(getActivity(), getActivity().getApplicationContext().getPackageName() + ".provider", myPhotoFile);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.putExtra(MediaStore.EXTRA_OUTPUT, myPhotoFileUri);
Тhat's all you need.
Also not need to create
public class GenericFileProvider extends FileProvider {}
I test on Android 5.0, 6.0 and Android 9.0 and it's success work.

add this two line in onCreate
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
Share method
File dir = new File(Environment.getExternalStorageDirectory(), "ColorStory");
File imgFile = new File(dir, "0.png");
Intent sendIntent = new Intent(Intent.ACTION_VIEW);
sendIntent.setType("image/*");
sendIntent.setAction(Intent.ACTION_SEND);
sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + imgFile));
sendIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(sendIntent, "Share images..."));

For downloading pdf from server , add below code in your service class. Hope this is helpful for you.
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName + ".pdf");
intent = new Intent(Intent.ACTION_VIEW);
//Log.e("pathOpen", file.getPath());
Uri contentUri;
contentUri = Uri.fromFile(file);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
if (Build.VERSION.SDK_INT >= 24) {
Uri apkURI = FileProvider.getUriForFile(context, context.getApplicationContext().getPackageName() + ".provider", file);
intent.setDataAndType(apkURI, "application/pdf");
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
} else {
intent.setDataAndType(contentUri, "application/pdf");
}
And yes , don't forget to add permissions and provider in your manifest.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths" />
</provider>
</application>

I don't know why, I did everything exactly the same as Pkosta (https://stackoverflow.com/a/38858040 ) but kept getting error:
java.lang.SecurityException: Permission Denial: opening provider redacted from ProcessRecord{redacted} (redacted) that is not exported from uid redacted
I wasted hours on this issue. The culprit? Kotlin.
val playIntent = Intent(Intent.ACTION_VIEW, uri)
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
intent was actually setting getIntent().addFlags instead of operating on my newly declared playIntent.

As of Android N, in order to work around this issue, you need to use the FileProvider API
There are 3 main steps here as mentioned below
Step 1: Manifest Entry
<manifest ...>
<application ...>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
</application>
</manifest>
Step 2: Create XML file res/xml/provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/>
</paths>
Step 3: Code changes
File file = ...;
Intent install = new Intent(Intent.ACTION_VIEW);
install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
// Old Approach
install.setDataAndType(Uri.fromFile(file), mimeType);
// End Old approach
// New Approach
Uri apkURI = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", file);
install.setDataAndType(apkURI, mimeType);
install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
// End New Approach
context.startActivity(install);

I spent almost a day trying to figure out why I was getting this exception. After lots of struggle, this config worked perfectly (Kotlin):
AndroidManifest.xml
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="com.lomza.moviesroom.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths>
<files-path name="movies_csv_files" path="."/>
</paths>
Intent itself
fun goToFileIntent(context: Context, file: File): Intent {
val intent = Intent(Intent.ACTION_VIEW)
val contentUri = FileProvider.getUriForFile(context, "${context.packageName}.fileprovider", file)
val mimeType = context.contentResolver.getType(contentUri)
intent.setDataAndType(contentUri, mimeType)
intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
return intent
}
I explain the whole process here.

I have just done following if android version > 24
File fl = new File(url);
Uri uri = Uri.fromFile(fl);
Intent intent = new Intent(Intent.ACTION_VIEW);
if (android.os.Build.VERSION.SDK_INT>=24)
{
Context context = getApplicationContext();
uri = FileProvider.getUriForFile(
context,
context.getApplicationContext()
.getPackageName() + ".provider", fl);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
intent.setDataAndType(uri, mimetype);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Following this link then https://medium.com/#ali.muzaffar/what-is-android-os-fileuriexposedexception-and-what-you-can-do-about-it-70b9eb17c6d0#.54odzsnk4

#Pkosta 's answer is one way of doing this.
Besides using FileProvider, you can also insert the file into MediaStore (especially for image and video files), because files in MediaStore are accessible to every app:
The MediaStore is primarily aimed at video, audio and image MIME types, however beginning with Android 3.0 (API level 11) it can also store non-media types (see MediaStore.Files for more info). Files can be inserted into the MediaStore using scanFile() after which a content:// style Uri suitable for sharing is passed to the provided onScanCompleted() callback. Note that once added to the system MediaStore the content is accessible to any app on the device.
For example, you can insert a video file to MediaStore like this:
ContentValues values = new ContentValues();
values.put(MediaStore.Video.Media.DATA, videoFilePath);
Uri contentUri = context.getContentResolver().insert(
MediaStore.Video.Media.EXTERNAL_CONTENT_URI, values);
contentUri is like content://media/external/video/media/183473, which can be passed directly to Intent.putExtra:
intent.setType("video/*");
intent.putExtra(Intent.EXTRA_STREAM, contentUri);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
activity.startActivity(intent);
This works for me, and save the hassles of using FileProvider.

i put this method so imageuri path easily get in content.
enter code here
public Uri getImageUri(Context context, Bitmap inImage)
{
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.PNG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(context.getContentResolver(),
inImage, "Title", null);
return Uri.parse(path);
}

I know this is a pretty old question but this answer is for future viewers. So I've encountered a similar problem and after researching, I've found an alternative to this approach.
Your Intent here
for eg: To view your image from your path in Kotlin
val intent = Intent()
intent.setAction(Intent.ACTION_VIEW)
val file = File(currentUri)
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
val contentURI = getContentUri(context!!, file.absolutePath)
intent.setDataAndType(contentURI,"image/*")
startActivity(intent)
Main Function below
private fun getContentUri(context:Context, absPath:String):Uri? {
val cursor = context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
arrayOf<String>(MediaStore.Images.Media._ID),
MediaStore.Images.Media.DATA + "=? ",
arrayOf<String>(absPath), null)
if (cursor != null && cursor.moveToFirst())
{
val id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID))
return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, Integer.toString(id))
}
else if (!absPath.isEmpty())
{
val values = ContentValues()
values.put(MediaStore.Images.Media.DATA, absPath)
return context.getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
}
else
{
return null
}
}
Likewise, instead of an image, you can use any other file format like pdf and in my case, it worked just fine

I wanted to share images from the app's scoped storage and that's where I was getting this exception. Searched for hours and then, at last, I found this blog.
It's a bit long so I am sharing the gist here but I will recommend you to go through it.
The bottom line is you can't share anything from the app's scoped storage. Also in Android 12, the intent chooser bottom dialog shows the preview of the image you are sharing which is super cool by the way, but it can't load the preview from the scoped storage URI.
The solution is to create a copy of the file you 'intent' to share in the cache directory.
val cachePath = File(externalCacheDir, "my_images/")
cachePath.mkdirs()
val bitmap = loadImageFromStorage(currentQuote.bookId)
val file = File(cachePath, "cache.png")
val fileOutputStream: FileOutputStream
try {
fileOutputStream = FileOutputStream(file)
bitmap?.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream)
fileOutputStream.flush()
fileOutputStream.close()
} catch (e: FileNotFoundException) {
e.printStackTrace()
} catch (e: IOException) {
e.printStackTrace()
}
val cacheImageUri: Uri = FileProvider.getUriForFile(this, applicationContext.packageName + ".provider", file)
val intent = Intent(Intent.ACTION_SEND).apply {
clipData = ClipData.newRawUri(null, cacheImageUri)
putExtra(Intent.EXTRA_STREAM, cacheImageUri)
type = "image/ *"
addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
}
startActivity(Intent.createChooser(intent, null))
And this is how I am loading file from scoped storage
fun Context.loadImageFromStorage(path: String): Bitmap? {
try {
val file = getFile(path)
val bitmap = BitmapFactory.decodeStream(FileInputStream(file))
return bitmap
} catch (e: Exception) {
e.printStackTrace()
//Returning file from public storage in case the file is stored in public storage
return BitmapFactory.decodeStream(FileInputStream(File(path)))
}
return null
}
fun Context.getFile(path: String): File? {
val cw = ContextWrapper(this)
val directory = cw.getDir("image_dir", Context.MODE_PRIVATE)
if (!directory.exists())
directory.mkdir()
try {
val fileName = directory.absolutePath + "/" + path.split("/").last()
return File(fileName)
} catch (e: Exception) {
e.printStackTrace()
}
return null
}
Lastly, don't forget to update your provider_paths.xml file
<external-cache-path name="external_cache" path="." />
<external-cache-path name="external_files" path="my_images/"/>

Xamarin.Android
Note: The path xml/provider_paths.xml (.axml) couldn't be resolved, even after making the xml folder under Resources (maybe it can be put in an existing location like Values, didn't try), so I resorted to this which works for now. Testing showed that it only needs to be called once per application run (which makes sense being that it changes the operational state of the host VM).
Note: xml needs to be capitalized, so Resources/Xml/provider_paths.xml
Java.Lang.ClassLoader cl = _this.Context.ClassLoader;
Java.Lang.Class strictMode = cl.LoadClass("android.os.StrictMode");
System.IntPtr ptrStrictMode = JNIEnv.FindClass("android/os/StrictMode");
var method = JNIEnv.GetStaticMethodID(ptrStrictMode, "disableDeathOnFileUriExposure", "()V");
JNIEnv.CallStaticVoidMethod(strictMode.Handle, method);

This works
val uri = if (Build.VERSION.SDK_INT < 24) Uri.fromFile(file) else Uri.parse(file.path)
val shareIntent = Intent().apply {
action = Intent.ACTION_SEND
type = "application/pdf"
putExtra(Intent.EXTRA_STREAM, uri)
putExtra(
Intent.EXTRA_SUBJECT,
"Purchase Bill..."
)
putExtra(
Intent.EXTRA_TEXT,
"Sharing Bill purchase items..."
)
}
startActivity(Intent.createChooser(shareIntent, "Share Via"))

Simply let it ignore the URI Exposure...
Add it after on create
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());

FileProvider - Open File from Download Directory

I can't open any file from Download Folder.
I can download a file and save in Download Folder with this:
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
request.setDescription(descricao);
request.setTitle(titulo);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
}
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, nome);
enq = downloadManager.enqueue(request);
After this, my file is correct saved at Directory Folder: Android >> Internal Shared Storage >> Download.
***This path I see manually opening the device's hd in ubuntu. As the image shows the path.
Android HD by ubuntu folder - see the path
And I try open this file with this:
downloadManager = (DownloadManager)getContext().getSystemService(DOWNLOAD_SERVICE);
BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if(DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
long downloadId = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, 0);
DownloadManager.Query query = new DownloadManager.Query();
query.setFilterById(enq);
Cursor c = downloadManager.query(query);
if(c.moveToFirst()) {
int columnIndex = c.getColumnIndex(DownloadManager.COLUMN_STATUS);
if(DownloadManager.STATUS_SUCCESSFUL == c.getInt(columnIndex)) {
String uriString = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
if (uriString.substring(0, 7).matches("file://")) {
uriString = uriString.substring(7);
}
File file = new File(uriString);
Uri uriFile = FileProvider.getUriForFile(getContext(), BuildConfig.APPLICATION_ID + ".fileprovider", file);
String mimetype = "application/pdf";
Intent myIntent = new Intent(Intent.ACTION_VIEW);
myIntent.setDataAndType(uriFile, mimetype);
Intent intentChooser = Intent.createChooser(myIntent, "Choose Pdf Application");
startActivity(intentChooser);
}
}
}
}
};
getContext().registerReceiver(receiver, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
I declare my file provider in manifest with this:
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/provider_paths"/>
</provider>
and with this:
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="Download" path="Download/"/>
</paths>
But when I click the button to download I receive this message: "This file coud be not accessed. Check the location or the network and try again."
Resuming:
1 - The file is downloaded and saved at the directory folder.
2 - The intent is started, but the file is not openned.
3 - Debug mode give me this at "new File(urlString)": "urlString=/storage/emulated/0/Download/name.pdf"
4 - At "FileProvider.getUriFromFile..." debug mode have this:
"uriFile = content://com.example.android.parlamentaresapp.fileprovider/Download/name.pdf"
Thank you.

Call addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION) on the Intent that you use with startActivity() and the FileProvider Uri. Without that, the activity has no rights to access your content.

Open Image with intent from internal storage

I want to open an image from internal folder with the android default image viewer, on the Nexus 7 tablet.
I use the following code,but for some reason the image is not displayed. What I'm doing wrong? The path to the file is :
file:///data/data/com.example.denandroidapp/files/Attachments/photoTemp/photo.jpg
(this is what Uri.parse("file://" + file) returns).
ArticlePhoto photo = new ArticlePhoto(soapObject);
File f = new File(context.getFilesDir() + "/Attachments/photoTemp");
if(!f.exists())
f.mkdirs();
if (photo.ArtPhoto != null) {
Bitmap articlePhoto = BitmapFactory.decodeByteArray(photo.ArtPhoto, 0, photo.ArtPhoto.length);
ByteArrayOutputStream bytesFile = new ByteArrayOutputStream();
articlePhoto.compress(Bitmap.CompressFormat.JPEG, 100, bytesFile);
File file = new File(f + "/photo.jpeg");
try {
if(!file.exists())
file.createNewFile();
FileOutputStream outStream = new FileOutputStream(file);
outStream.write(bytesFile.toByteArray());
outStream.close();
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://" + file),"image/jpeg");
startActivity(intent);
} catch(Exception ex) {
AlertDialog alert = new AlertDialog.Builder(context).create();
alert.setTitle("Warning!");
alert.setMessage(ex.getMessage());
alert.show();
}
}

Try with this :
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
Uri uri = Uri.parse("file://" + file.getAbsolutePath());
intent.setDataAndType(uri,"image/*");
startActivity(intent);
Thanks.

The problem is that the image is internal to your application! So an external application (Image Viewer) has no access to the data that is internal to your application.
What you might have to do is create a Content Provider .
http://web.archive.org/web/20111020204554/http://www.marcofaion.it/?p=7
Android Manifest.xml
<provider android:authorities="com.example.denandroidapp" android:enabled="true" android:exported="true" android:name=<fully classified name of provider class>>
</provider>
Creating Intent
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.parse("content://com.example.denandroidapp/" + filename);
intent.setDataAndType(uri, "image/jpeg");

If a file is associated with your app (stored on the internal storage of your app space ), other apps can not access your file directly provided a valid file path. Instead, you have to create a file provider and generate a content uri.
First, add the file provider in your AndroidManifest.xml
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.mydomain.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
Then you need to create an a file named file_paths in xml/file_paths.xml (the directory xml is not created by default, so create it).
file_paths.xml looks like
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<files-path name="myFiles" path="./"/>
</paths>
add as much as paths you want your provider to access in .
atlast you need to create your intent
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
File imagePath = new File(context.getFilesDir(), "fileName");
Uri contentUri = FileProvider.getUriForFile(context, "com.mydomain.fileprovider", imagePath);
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setDataAndType(contentUri,"image/*");
context.startActivity(intent);
Note: make sure the file path sepecefied in file_paths.xml and new File(context.getFilesDir(),"fileName"), matches. getFilesDir() will give you the root directory of your app.

Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(outputFileName)),"image/jpeg");
startActivity(intent);

You can use FileProvider which extends ContentProvider
Check the link -
https://developer.android.com/reference/android/support/v4/content/FileProvider
To specify the FileProvider component itself, add a "provider" element to your app manifest.
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.mydomain.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" />
</provider>
You must specify a child element of "paths" for each directory that contains files for which you want content URIs. For example, these XML elements specify two directories
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<files-path name="my_images" path="images/"/>
<files-path name="my_docs" path="docs/"/>
</paths>
After this you need to generate content URI for the file and then call the intent, refer the below link
https://developer.android.com/reference/android/support/v4/content/FileProvider#GetUri

Check this: https://stackoverflow.com/a/11088980/1038442;
File file = new File(filePath);
MimeTypeMap map = MimeTypeMap.getSingleton();
String ext = MimeTypeMap.getFileExtensionFromUrl(file.getName());
String type = map.getMimeTypeFromExtension(ext);
if (type == null)
type = "*/*";
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri data = Uri.fromFile(file);
intent.setDataAndType(data, type);
startActivity(intent);
PS: if your are trying to open .jpg files, try to
Replace String ext = MimeTypeMap.getFileExtensionFromUrl(file.getName());
With String ext = MimeTypeMap.getFileExtensionFromUrl(".jpg");
Good luck.

In my case, The gallery launched but did not show any images and went straight to the home page. My situation is quite different from what OP faced but I think it's worth mentioning here since the question is about images not being shown through implicit intent.
My problem came from the code below.
val intent = context.packageManager.getLaunchIntentForPackage(packageName ?: "")
The code above tells PackageManager to launch the entry point of the application, instead of the activity that shows the images.
If you look at the Logcat above, you can find that the intent launched with cat=[android.intent.category.Launcher] will go to SplashActivity. This happened because I created the intent with getLaunchIntentForPackage()
Alternative is to use Intent with setPackage() like the code in below
val intent = Intent()
val uri = Uri.fromFile(file) // You should probably replace with ContentProvider's uri
intent.apply {
flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
action = Intent.ACTION_VIEW
setPackage(packageName)
setDataAndType(uri, "image/*")
}
context.startActivity(intent)