Develop Reference

Android Intent to open instagram posting view

How to open Instagram app in posting mode (so the same view we get after clicking plus at home screen within Instagram app)? I've seen android apps which are doing that, however wasn't able to find information explaing how to achieve it.
That code works for opening the home view:
Uri uri = Uri.parse("http://instagram.com/");
Intent likeIng = new Intent(Intent.ACTION_VIEW, uri);
likeIng.setPackage("com.instagram.android");
startActivity(likeIng);
Perhaps there is some other uri which could work?

After a bit of research it turned out that deep linking with 'instagram://share' opens the desired view.

You can do that only when you have a media to share on Instagram:
try {
String type = "image/*";
String filename = "/myPhoto.jpg";
String mediaPath = Environment.getExternalStorageDirectory() + filename;
Intent share = new Intent(Intent.ACTION_SEND);
share.setPackage("com.instagram.android");
share.setType(type);
File media = new File(mediaPath);
Uri uri = null;
share.putExtra(Intent.EXTRA_STREAM, uri);
startActivity(share);
} catch (Exception e) {
e.printStackTrace();
}
You can create a fake media though to be able to use this method.

Just to expand on #Paavo answer to show the answer in code.
Uri uri = Uri.parse("instagram://share");
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
intent.setPackage("com.instagram.android");
//Check that the user can open the intent, meaning they have the Instagram app installed
if (getPackageManager().resolveActivity(intent, 0) != null)
startActivity(intent);
else //User doesn't have app installed, handle however you want
throw new Resources.NotFoundException();

Android - How do I open a file in another app via Intent?

I'm trying to open a file using another app, i.e. opening a .jpg with Gallery, .pdf with Acrobat, etc.
The problem I'm having with this is when I try to open the file in the app, it only opens the chosen app instead of opening the file within the app. I tried following Android open pdf file via Intent but I must be missing something.
public String get_mime_type(String url) {
String ext = MimeTypeMap.getFileExtensionFromUrl(url);
String mime = null;
if (ext != null) {
mime = MimeTypeMap.getSingleton().getMimeTypeFromExtension(ext);
}
return mime;
}
public void open_file(String filename) {
File file = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS), filename);
// Get URI and MIME type of file
Uri uri = Uri.fromFile(file).normalizeScheme();
String mime = get_mime_type(uri.toString());
// Open file with user selected app
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setData(uri);
intent.setType(mime);
context.startActivity(Intent.createChooser(intent, "Open file with"));
}
As far as I can tell, it returns the right URI and MIME type:
URI: file:///storage/emulated/0/Download/Katamari-ringtone-985279.mp3
MIME: audio/mpeg

Posting my changes here in case it can help someone else. I ended up changing the download location to an internal folder and adding a content provider.
public void open_file(String filename) {
File path = new File(getFilesDir(), "dl");
File file = new File(path, filename);
// Get URI and MIME type of file
Uri uri = FileProvider.getUriForFile(this, App.PACKAGE_NAME + ".fileprovider", file);
String mime = getContentResolver().getType(uri);
// Open file with user selected app
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(uri, mime);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(intent);
}

I used this piece of code and it worked perfectly fine on android 6 and below not tested on the higher version
public void openFile(final String fileName){
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File(android.os.Environment.getExternalStorageDirectory()
.getAbsolutePath()+ File.separator+"/Folder/"+fileName));
intent.setDataAndType(uri, "audio/mpeg");
startActivity(intent);
}

Android: How to open a specific folder via Intent and show its content in a file browser?

I thought this would be easy but as it turns out unfortunately it's not.
What I have:
I have a folder called "myFolder" on my external storage (not sd card because it's a Nexus 4, but that should not be the problem). The folder contains some *.csv files.
What I want:
I want to write a method which does the following: Show a variety of apps (file browsers) from which I can pick one (see picture). After I click on it, the selected file browser should start and show me the content of "myFolder". No more no less.
My question:
How exactly do I do that? I think I came quite close with the following code, but no matter what I do - and I'm certain that there must be something I didn't get right yet - it always opens only the main folder from the external storage.
public void openFolder()
{
File file = new File(Environment.getExternalStorageDirectory(),
"myFolder");
Log.d("path", file.toString());
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setDataAndType(Uri.fromFile(file), "*/*");
startActivity(intent);
}

This should help you:
Uri selectedUri = Uri.parse(Environment.getExternalStorageDirectory() + "/myFolder/");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(selectedUri, "resource/folder");
if (intent.resolveActivityInfo(getPackageManager(), 0) != null)
{
startActivity(intent);
}
else
{
// if you reach this place, it means there is no any file
// explorer app installed on your device
}
Please, be sure that you have any file explorer app installed on your device.
EDIT: added a shantanu's recommendation from the comment.
LIBRARIES:
You can also have a look at the following libraries https://android-arsenal.com/tag/35 if the current solution doesn't help you.

I finally got it working. This way only a few apps are shown by the chooser (Google Drive, Dropbox, Root Explorer, and Solid Explorer). It's working fine with the two explorers but not with Google Drive and Dropbox (I guess because they cannot access the external storage). The other MIME type like "*/*" is also possible.
public void openFolder(){
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
Uri uri = Uri.parse(Environment.getExternalStorageDirectory().getPath()
+ File.separator + "myFolder" + File.separator);
intent.setDataAndType(uri, "text/csv");
startActivity(Intent.createChooser(intent, "Open folder"));
}

Here is my answer
private fun openFolder() {
val location = "/storage/emulated/0/Download/";
val intent = Intent(Intent.ACTION_VIEW)
val myDir: Uri = FileProvider.getUriForFile(context, context.applicationContext.packageName + ".provider", File(location))
intent.flags = Intent.FLAG_GRANT_READ_URI_PERMISSION
intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT)
intent.setDataAndType(myDir, DocumentsContract.Document.MIME_TYPE_DIR)
else intent.setDataAndType(myDir, "*/*")
if (intent.resolveActivityInfo(context.packageManager, 0) != null)
{
context.startActivity(intent)
}
else
{
// if you reach this place, it means there is no any file
// explorer app installed on your device
CustomToast.toastIt(context,context.getString(R.string.there_is_no_file_explorer_app_present_text))
}
}
Here why I used FileProvider - android.os.FileUriExposedException: file:///storage/emulated/0/test.txt exposed beyond app through Intent.getData()
I tested on this device
Devices: Samsung SM-G950F (dreamltexx), Os API Level: 28

Intent chooser = new Intent(Intent.ACTION_GET_CONTENT);
Uri uri = Uri.parse(Environment.getDownloadCacheDirectory().getPath().toString());
chooser.addCategory(Intent.CATEGORY_OPENABLE);
chooser.setDataAndType(uri, "*/*");
// startActivity(chooser);
try {
startActivityForResult(chooser, SELECT_FILE);
}
catch (android.content.ActivityNotFoundException ex)
{
Toast.makeText(this, "Please install a File Manager.",
Toast.LENGTH_SHORT).show();
}
In code above, if setDataAndType is "*/*" a builtin file browser is opened to pick any file, if I set "text/plain" Dropbox is opened. I have Dropbox, Google Drive installed. If I uninstall Dropbox only "*/*" works to open file browser. This is Android 4.4.2. I can download contents from Dropbox and for Google Drive, by getContentResolver().openInputStream(data.getData()).

Thread is old but I needed this kind of feature in my application and I found a way to do it so I decided to post it if it can help anyone in my situation.
As our device fleet is composed only by Samsung Galaxy Tab 2, I just had to find the file explorer's package name, give the right path and I succeed open my file explorer where I wanted to. I wish I could use Intent.CATEGORY_APP_FILES but it is only available in API 29.
Intent intent = context.getPackageManager().getLaunchIntentForPackage("com.sec.android.app.myfiles");
Uri uri = Uri.parse(rootPath);
if (intent != null) {
intent.setData(uri);
startActivity(intent);
}
As I said, it was easy for me because our clients have the same device but it may help others to find a workaround for their own situation.

this code will work with OI File Manager :
File root = new File(Environment.getExternalStorageDirectory().getPath()
+ "/myFolder/");
Uri uri = Uri.fromFile(root);
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setData(uri);
startActivityForResult(intent, 1);
you can get OI File manager here : http://www.openintents.org/en/filemanager

Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(uri, DocumentsContract.Document.MIME_TYPE_DIR);
startActivity(intent);
Will open files app home screen

Today, you should be representing a folder using its content: URI as obtained from the Storage Access Framework, and opening it should be as simple as:
Intent i = new Intent(Intent.ACTION_VIEW, uri);
startActivity(i);

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("text/csv");
intent.addCategory(Intent.CATEGORY_OPENABLE);
try {
startActivityForResult(Intent.createChooser(intent, "Select a File to Upload"), 0);
} catch (android.content.ActivityNotFoundException ex) {
ex.printStackTrace();
}
then you just need to add the response
public void onActivityResult(int requestCode, int resultCode, Intent data){
switch (requestCode) {
case 0: {
//what you want to do
//file = new File(uri.getPath());
}
}
}

You seem close.
I would try to set the URI like this :
String folderPath = Environment.getExternalStorageDirectory()+"/pathTo/folder";
Intent intent = new Intent();
intent.setAction(Intent.ACTION_GET_CONTENT);
Uri myUri = Uri.parse(folderPath);
intent.setDataAndType(myUri , "file/*");
startActivity(intent);
But it's not so different from what you have tried.
Tell us if it changes anything ?
Also make sure the targeted folder exists, and have a look on the resulting Uri object before to send it to the intent, it may not be what we are expected.

File temp = File.createTempFile("preview", ".png" );
String fullfileName= temp.getAbsolutePath();
final String fileName = Uri.parse(fullfileName)
.getLastPathSegment();
final String filePath = fullfileName.
substring(0,fullfileName.lastIndexOf(File.separator));
Log.d("filePath", "filePath: " + filePath);
fullfileName:
/mnt/sdcard/Download_Manager_Farsi/preview.png
filePath:
/mnt/sdcard/Download_Manager_Farsi

How to use Intent.ATTACH_DATA

I'm trying to implement "set as" functionality for images. I'm using Intent.ATTACH_DATA so users can at least choose contact photo and wallpaper. The extras I should pass confuse me. If I read the documentation right,
Intent intent = new Intent(Intent.ACTION_ATTACH_DATA);
intent.setType("image/*");
intent.setData(mImageCaptureUri);
startActivity(Intent.createChooser(intent, "hey"));
Should be all. This works for wallpapers, but with megapixel data, the app crashes, because no crop activity could be found. Does someone have a working example? The official gallery app does manage to find the camera.crop activity...
A general hint on where to find elaborate system intent documentation is welcome as well.

After a long and winding road through the android source, I found the actual code in the default gallery (gallery3d) app. I adapted for use in my own application, and rewrote it again for convenience when importing in other applications. If you use or appreciate this, I ask that you upvote this answer.
Adapted from : gallery3d source at grepcode
Usage: change first line to match the full path (starting with /mnt/) of your photo.
add string "set_as" to your strings.xml as the action chooser title.
String absolutepath = MyApplication.appRootDir + relpath;//change for your application
Intent intent = new Intent(Intent.ACTION_ATTACH_DATA);
MimeTypeMap map = MimeTypeMap.getSingleton();
String ext = absolutepath.substring(absolutepath.lastIndexOf('.') + 1);
String mimeType = map.getMimeTypeFromExtension(ext);
Uri uri = Uri.fromFile(new File(absolutepath));
intent.setDataAndType(uri, mimeType);
intent.putExtra("mimeType", mimeType);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
Activity activity = (Activity) this;
activity.startActivity(Intent.createChooser(
intent, activity.getString(R.string.set_as)));

Above answers are great , however here is one i tested and used.
private void setAsWallpaper(String path_of_file) {
try {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_ATTACH_DATA);
File file = new File(path_of_file);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
intent.setDataAndType(FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", file), getMimeType(path_of_file);
context.startActivity(intent);
} catch (ActivityNotFoundException e) {
Toast.makeText(context, "Exception generated", Toast.LENGTH_SHORT).show();
}
}
private static String getMimeType(String url) {
String type = null;
String extension = MimeTypeMap.getFileExtensionFromUrl(url);
if (extension != null) {
type = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension);
}
return type;
}
and simply call setAsWallpaper(path);
here path is absolute path of file .

How to open an excel file in android

I have downloaded the excel file to sdcard. want to open the file in my app and process it.
Is there any way or any intent to open an excel file in android. I

Use the below mentioned code and try:
File file = new File(Environment.getExternalStorageDirectory()+ "/filepath/" + filename);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.ms-excel");
startActivity(intent);

Use this piece of code which can be used to open arbitrary file (not only Excel).
General idea is to get based on file mime type which Intent can handle it and then start those Intent. For sure it may happen that system doesn't have any intents to handle it or may have several Intents. Anyway here's general direction:
Get mime type for given filename
public String getMimeType(String filename)
{
String extension = FileUtils.getExtension(filename);
// Let's check the official map first. Webkit has a nice extension-to-MIME map.
// Be sure to remove the first character from the extension, which is the "." character.
if (extension.length() > 0)
{
String webkitMimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(extension.substring(1));
if (webkitMimeType != null)
return webkitMimeType;
}
return "*/*";
}
Then get default intent which will handle given mime type
public Intent getDefaultViewIntent(Uri uri)
{
PackageManager pm = this.getPackageManager();
Intent intent = new Intent(Intent.ACTION_VIEW);
// Let's probe the intent exactly in the same way as the VIEW action
String name=(new File(uri.getPath())).getName();
intent.setDataAndType(uri, this.getMimeType(name));
final List<ResolveInfo> lri = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
if(lri.size() > 0)
return intent;
return null;
}
And as final step just start Intent returned by getDefaultViewIntent()

Try this:
public void ouvrir(View view) {
String csvFile = "myData.xls";
File yourDir = new File(Environment.getExternalStorageDirectory()+ "/CHETEHOUNA/" + csvFile);
String davUrl = "ms-excel:ofv|u|" + yourDir.toString();
Uri uri = Uri.parse(davUrl);
Intent intent = new Intent(Intent.ACTION_VIEW, uri);
startActivity(intent);
}

Uri path = Uri.fromFile(file);
Intent excelIntent = new Intent(Intent.ACTION_VIEW);
excelIntent.setDataAndType(path , "application/vnd.ms-excel");
excelIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try {
startActivity(excelIntent);
} catch (ActivityNotFoundException e) {
Toast.makeText(EmptyBlindDocumentShow.this,"No Application available to viewExcel", Toast.LENGTH_SHORT).show();
}

Can you elaborate?
If you want to read excel file from SD card using File, here is the code
File root = Environment.getExternalStorageDirectory();
File excelFile = new File(root, "filename.xlsx");