Android 10+ scoped storage

[yuriyuvarov]

On Android 11+ (API 30+) app won't work without scoped storage access.

Possible solution
`

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	super.onActivityResult(requestCode, resultCode, data);
	if(resultCode == RESULT_OK && requestCode == RQS_OPEN_DOCUMENT_TREE){
		Uri uriTree = data.getData();
        assert uriTree != null;
		DocumentFile documentFile = DocumentFile.fromTreeUri(this, uriTree);
        assert documentFile != null;
		String fileName = "";
        for (DocumentFile file : documentFile.listFiles()) {
			DocumentFile directory = DocumentFile.fromTreeUri(this, file.getUri());
			if (!file.isDirectory()) {
				Cursor cursor = this.getContentResolver().query(file.getUri(), null, null, null, null);
                assert cursor != null;
                int columnIndex = cursor.getColumnIndexOrThrow(OpenableColumns.DISPLAY_NAME);
				if (cursor.moveToFirst()) {
					fileName = cursor.getString(columnIndex);
				}
				cursor.close();
				File appExternalDir = new File(this.getExternalFilesDir(null), "/TextFiction/games/" + fileName);

                try (InputStream in = getContentResolver().openInputStream(file.getUri())) {
					try (FileOutputStream out = new FileOutputStream(appExternalDir)) {
                        byte[] buf = new byte[1024];
						int len;
						while ((len = in.read(buf)) > 0) {
							out.write(buf, 0, len);
						}
					}
                } catch (IOException e) {
                    throw new RuntimeException(e);
                }//Files.copy(src, appExternalDir.toPath());//API 26
			}
		}
	}
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
		case R.id.mi_access: {
			Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE );//_TREE
			startActivityForResult(intent, RQS_OPEN_DOCUMENT_TREE );
			return true;
		}
	}
	return false;
}

`