Develop Reference

No such file or directory in Android 10 (api 29)

I am working on a photo editor app in which after editing my picture I save it into my local storage. It is working fine till android 9 but not on android 10. It shows exception of "No such file or directory found" in Android 10. After some research I found that getExternalFilesDir() is deprecated in android Q+. But I cannot find any proper way to do it in android 10. So please if anyone can provide a tutorial it would be really helpful.
I've added and granted uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> in case of it was the issue, and it didn't solve anything.
This is my try (Used ParcelFileDescriptor):
private void fileAccessForAndroidQ(Uri fileUri){
try {
ParcelFileDescriptor parcelFileDescriptor = this.getContentResolver().openFileDescriptor(fileUri, "r", null);
InputStream inputStream = new FileInputStream(parcelFileDescriptor.getFileDescriptor());
Cursor returnCursor =
getContentResolver().query(fileUri, null, null, null, null);
int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
returnCursor.moveToFirst();
fileName = returnCursor.getString(nameIndex);
file = new File(this.getFilesDir(), fileName);
OutputStream outputStream = new FileOutputStream(file);
IOUtils.copyStream(inputStream, outputStream);
}catch (Exception e){
Toast.makeText(this, ""+e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
Any kind of help would be appreciated.

If you target Android 10 (API level 29) or higher, set the value of requestLegacyExternalStorage to true in your app's manifest file:
Documentation
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.appname"
android:installLocation="auto">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:requestLegacyExternalStorage="true"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme.NoActionBar">
<activity android:name=".activities.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

Here is the best I could find:
https://developer.android.com/training/data-storage/app-specific#external
Basically, you now use app-specific directories for your files. For example:
#Nullable
File getAppSpecificAlbumStorageDir(Context context, String albumName) {
// Get the pictures directory that's inside the app-specific directory on
// external storage.
File file = new File(context.getExternalFilesDir(
Environment.DIRECTORY_PICTURES), albumName);
if (file == null || !file.mkdirs()) {
Log.e(LOG_TAG, "Directory not created");
}
return file;
}

I found this working for me. i am trying to list all file on ListView
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 0);
} else {
File s = Environment.getExternalStorageDirectory();
Log.d("Path ",Arrays.toString(s.listFiles()));
File[] s1 = new File[s.listFiles().length];
for(int i=0;i<s.listFiles().length;i++){
s1[i]= new File(s.listFiles()[i].toString().replace("/storage/emulated/0/", ""));
}
ArrayAdapter<File> adapter = new ArrayAdapter<File>(this,R.layout.support_simple_spinner_dropdown_item,s1);
l1.setAdapter(adapter);
}

Getting null pointer exception when trying to get the URI for a file

When the activity opens, a dialog window opens asking the user to either take a picture from the camera, or choose one from the gallery. As soon as I hit the button to open the camera, the app crashes and I get a Null Pointer exception related to getting the URI. I have been following Google's walkthrough for saving pictures form the camera and can't seem to find where the issue is.
Line where the error occurs:
Uri photoURI = FileProvider.getUriForFile(CreatePostActivity.this,
"xyz.beerme.beerme.provider",
photoFile);
Whole method:
cameraButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if(intent.resolveActivity(getPackageManager()) != null){
File photoFile = null;
try{
photoFile = createImageFile();
} catch (IOException ex){
Snackbar message = Snackbar.make(findViewById(R.id.activity_create_post), "Error creating image", Snackbar.LENGTH_LONG);
message.show();
}
if(photoFile != null){
Uri photoURI = FileProvider.getUriForFile(CreatePostActivity.this,
"xyz.beerme.beerme.provider",
photoFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(intent, REQUEST_CAMERA);
}
}
dialog.dismiss();
}
});
createImageFile method:
private File createImageFile() throws IOException{
String timeStamp = new SimpleDateFormat("yyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_beerme";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName,
".jpg",
storageDir
);
mCurrentPhotoPath = image.getAbsolutePath();
return image;
}
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="xyz.beerme.beerme">
<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:replace="android:supportsRtl">
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="redacted" />
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="xyz.beerme.beerme.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/file_paths" ></meta-data>
</provider>
<activity android:name=".PostsActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.categroy.LAUNCHER"/>
</intent-filter>
</activity>
<activity android:name=".CreatePostActivity"></activity>
</application>
</manifest>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images" path="Android/data/xyz.beerme.beerme/files/Pictures" />
</paths>

Try Below code for createImageFile method
private File createImageFile() {
File storageDir = context.getExternalFilesDir(Environment.DIRECTORY_PICTURES);
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
// path = path + (timeStamp + "1jpg");
try {
file = File.createTempFile(timeStamp, ".jpg", storageDir);
} catch (IOException e) {
e.printStackTrace();
}
if (Build.VERSION.SDK_INT >= 24)
mCurrentPhotoPath = String.valueOf(FileProvider.getUriForFile(MainActivity.this,
BuildConfig.APPLICATION_ID + ".provider", file));
else
mCurrentPhotoPath = String.valueOf(Uri.fromFile(file));
return file;
}

In case anyone finds this in the future, I typed "provider" instead of "fileprovider". As provider does not exist, that is the source of the exception.

Android emulator open failed: ENOENT (No such file or directory)

I need help with permission to save file in Android emulator ... I've had added
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera" android:required="true" />
in AndroidManifest.xml
My code for save file:
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
Bundle extras = data.getExtras();
Bitmap imageBitmap = (Bitmap) extras.get("data");
imageView.setImageBitmap(imageBitmap);
}
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/Img");
myDir.mkdirs();
long n = System.currentTimeMillis();
String fname = "IMG_" + n + ".jpeg";
file = new File(myDir, fname);
if (file.exists())
file.delete();
try {
FileOutputStream out2 = new FileOutputStream(file);// here fire exception
imageBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out2);
out2.flush();
out2.close();
} catch (Exception e) {
e.printStackTrace();
}
}
AndroidManifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.denis.calculator">
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".InfoActivity"></activity><!-- ATTENTION: This was auto-generated to add Google Play services to your project for
App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-feature android:name="android.hardware.camera" android:required="true" />
Any ideas pls?

Solution is downgrade from Nougat to KitKat! thanks for advices

Replace the below lines
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/Img");
With
File myDir = new File(Environment.getExternalStorageDirectory(),"Img");
Also remove the below lines from your code
if (file.exists())
file.delete();
Because the way you defining the file name will never gonna have the same file name. So validating the existence of file is irrelevant here.
You also have to ask writing permission with the user if your app is going to be used for Android 6.0 or above. Refer the link given below for details:
https://developer.android.com/training/permissions/requesting.html
You can use the solution defined in the library I've recently created this repository including a demo for Permission.
https://github.com/eeshan-jamal/DroidLibX
I will later make it available through Maven but for now you have to import the droidlibx library module in your project.

Unable to create external directory

I am unable to create a directory in the external storage folder. I have created a new project, modified the manifest and added the code as seen below. Any help would be greatly appreciated. I updated my post to include that the code provided below does not work. The only thing I can think is the emulator is the problem. I am running Nexis API 32 x64.
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.us.foobar"
xmlns:android="http://schemas.android.com/apk/res/android">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name"
android:theme="#style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
</application>
</manifest>
Source:
public void mkdir() throws Exception
{
String root = Environment.getExternalStorageDirectory().getAbsolutePath();
String dir = root + "/Foobar";
File file = new File(dir);
if (!file.exists())
{
if (!file.mkdirs())
{
throw new Exception("Unable to create application data directory.\r\n\r\nDirectory: " + dir);
}
}
}

I call the same function on onCreate and works fine. Look at my code:
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
test();
}
public void test() {
String root = Environment.getExternalStorageDirectory().getAbsolutePath();
String dir = root + "/Foobar";
File file = new File(dir);
if (!file.exists()) {
if (!file.mkdirs()) {
Log.e("Error", "Unable to create application data directory.\r\n\r\nDirectory: " + dir);
}
}
}
}

Using API 23 I had to request the permissions prior to writing to the file system as follows:
ActivityCompat.requestPermissions(
this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
REQUEST_EXTERNAL_STORAGE
);

Directory does and doesn't exist

I am trying to write a file to the SD card on my android phone, but it seems to be having issues with the directory. It exists but doesnt exist. By this I mean when I go to the file browser on the android phone, and look for the GPStracker folder I cannot find it. Yet in the program it seems to acknowledge that this directory exists when it checks the dir.exists() if condition below. Then when it gets to the canWrite() function it always returns false. I have no idea what is wrong at this point, anyone have any debugging ideas? Thanks.
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// We can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// We can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
// Something else is wrong. It may be one of many other states, but all we need
// to know is we can neither read nor write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
^ These both return true now, got that issue fixed.
Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tinywebteam.gpstracker"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.tinywebteam.gpstracker.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Code:
try {
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File(sdCard + "/GPStracker/data");
if (!dir.exists()) {
if (!dir.mkdirs())
throw new FileNotFoundException("Couldn't make directory.");
if (!dir.isDirectory())
throw new FileNotFoundException("Couldn't verify directory.");
}
File fileOut = new File(dir, "GPSTracker_" + ts + ".csv");
if (fileOut.canWrite()) {
FileOutputStream out = new FileOutputStream(fileOut);
out.write(fileStr.getBytes());
out.close();
System.out.println("File written successfully");
} else {
System.out.println("Could not write to file");
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}