You need Callback when User allow WRITE_EXTERNAL_STORAGE permission from RuntimePermission dialog.
First you need to implement OnRequestPermissionsResultCallback Listener of ActivityCompat class in your Activity and override void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) Method to check whether User is allowing or denying the permission
You can do like this:
int REQUEST_STORAGE = 1;
private void checkExternalStoragePermissions() {
if (hasStoragePermissionGranted()) {
//You can do what whatever you want to do as permission is granted
} else {
requestExternalStoragePermission();
}
}
public boolean hasStoragePermissionGranted(){
return ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED;
}
public void requestExternalStoragePermission() {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
ActivityCompat.requestPermissions(MainActivity.this, {Manifest.permission.WRITE_EXTERNAL_STORAGE},
REQUEST_STORAGE);
}
}
Here is onRequestPermissionsResult() method will be called when user allow or deny Permission from Runtime permission dialog.
You can also handle situation when User has checked never show Runtime Permission dialog.
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
if (requestCode == REQUEST_STORAGE) {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
//User allow from permission dialog
//You can do what whatever you want to do as permission is granted
} else if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivtity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
//User has deny from permission dialog
Snackbar.make(mainLayout, getResources().getString("Please enable storage permission"),Snackbar.LENGTH_INDEFINITE)
.setAction("OK", new View.OnClickListener() {
@Override
public void onClick(View view) {
ActivityCompat.requestPermissions(MainActivity.this, {Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_STORAGE);
}
})
.show();
} else {
// User has deny permission and checked never show permission dialog so you can redirect to Application settings page
Snackbar.make(mainLayout, getResources().getString("Please enable permission from settings"),Snackbar.LENGTH_INDEFINITE)
.setAction("OK", new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(); intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", MainActivity.this.getPackageName(), null);
intent.setData(uri);
startActivity(intent);
}
})
.show();
}
}
}
Here i have used Snackbar to show relevant message to user about Permission and mainLayout is id of Activity's Main Layout.
Hope it helps you.
