Retrieving Image from Chooser Intent in Android 10

Question

I'm trying to update my app to work with androids new scoped storage rules in Android 10 and up, but am having the hardest time with it. I know I need to rebuild my app with new versions of java, but I just want to get it to work while I study and learn enough to do so. In a nutshell, I really need help. I have read so many different ways to make scoped storage work, and everybody seems to be doing it differently.

Just for clarification, what I am trying to do with the uri is both display in an imageview, then upload to database.

This code is working to take a picture and select images and videos in android 9, but in android 10, it only works when camera component captures a picture or a video. When a user selects an image or video from file, it returns a null pointer exception. Because I am pretty sure the error is in how I am dealing with the different chooser intents, I have shown the on result code first.

I have been unable to find a clear example of how to retrieve a usable image or video uri in android 10. If anybody can help, I would really appreciate it. I know I have much to learn.

if ((new java.io.File(_filePath)).exists()){
} else {
_filePath = vidfile.getAbsolutePath();
if ((new java.io.File(_filePath)).exists()){
} else {
            ArrayList<String> _filePath_1 = new ArrayList<>();
            if (_data != null) {
                if (_data.getClipData() != null) {
                    for (int _index = 0; _index < _data.getClipData().getItemCount(); _index++) {
                        ClipData.Item _item = _data.getClipData().getItemAt(_index);
                        _filePath_1.add(FileUtil.convertUriToFilePath(getApplicationContext(), 
_item.getUri()));
                    }
                }
                else {
                    _filePath_1.add(FileUtil.convertUriToFilePath(getApplicationContext(), 
_data.getData()));
                }
            }

_filePath = _filePath_1.get((int)0);


}
}

Just in case I am wrong, here is the code for the click event to launch the chooser...

SimpleDateFormat date1 = new SimpleDateFormat("yyyyMMdd_HHmmss");
String fileName1 = date1.format(new Date()) + ".jpg";

picfile = new 
File(getApplicationContext().getExternalFilesDir(Environment.DIRECTORY_DCIM).getAbsolutePath() + 
File.separator + fileName1);

Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

Uri _uri_camr1 = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        _uri_camr1 = FileProvider.getUriForFile(getApplicationContext(), 
getApplicationContext().getPackageName() + ".provider", picfile);
    }
    else {
        _uri_camr1 = Uri.fromFile(picfile);
    }
    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, _uri_camr1);
    takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

SimpleDateFormat date2 = new SimpleDateFormat("yyyyMMdd_HHmmss");
String fileName2 = date2.format(new Date()) + ".mp4";

vidfile = new 
File(getApplicationContext().getExternalFilesDir(Environment.DIRECTORY_DCIM).getAbsolutePath() + 
File.separator + fileName2);

Intent takeVideoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

Uri _uri_camr2 = null;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
        _uri_camr2 = FileProvider.getUriForFile(getApplicationContext(), 
getApplicationContext().getPackageName() + ".provider", vidfile);
    }
    else {
        _uri_camr2 = Uri.fromFile(vidfile);
    }
    takeVideoIntent.putExtra(MediaStore.EXTRA_OUTPUT, _uri_camr2);
    takeVideoIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);

Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
 contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);

contentSelectionIntent.setType("*/*");

contentSelectionIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);

Intent[] intentArray = new Intent[]{ takePictureIntent, takeVideoIntent}; 

chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent); 
chooserIntent.putExtra(Intent.EXTRA_TITLE, "Choose an action"); 
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray); 
startActivityForResult(chooserIntent, REQ_CD_CAMR);

Answer 1

try this code. it copies the selected file to scoped storage and gives you the final path of scoped storage from where you can access it. try it out & let me know if you face any problem.

android.net.Uri sharedFileUri = android.net.Uri.fromFile(new java.io.File(_filepath));
        java.io.FileInputStream input = null;
        java.io.FileOutputStream output = null;
        try {
            String filePath = new java.io.File(getCacheDir(), "tmp").getAbsolutePath();
            android.os.ParcelFileDescriptor pfd = getContentResolver().openFileDescriptor(sharedFileUri, "rw");
            if (pfd != null) {
                java.io.FileDescriptor fd = pfd.getFileDescriptor();
                input = new java.io.FileInputStream (fd);
                output = new java.io.FileOutputStream (filePath);
                int read;
                byte[] bytes = new byte[4096];
                while ((read = input.read(bytes)) != -1) {
                    output.write(bytes, 0, read);
                }
                java.io.File sharedFile = new java.io.File(filePath);
                String finalPath = sharedFile.getPath(); // this will provide you path to scoped storage. use this final path to access the selected file from scoped storage.
            }
        }catch(Exception ex) {
            android.widget.Toast.makeText(this, ex.toString(), android.widget.Toast.LENGTH_SHORT).show();
        } finally {
            try {
                input.close();
                output.close();
            } catch (Exception ignored) {
            }
        }