public class MainActivity extends AppCompatActivity {



    List<Songs> songsList = new ArrayList<>();
    RecyclerView recyclerView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        recyclerView = findViewById(R.id.main_recyclerview);
        permission();



    }

    private void permission() {
        if ((ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.READ_MEDIA_AUDIO) != PackageManager.PERMISSION_GRANTED) ||
                (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.READ_MEDIA_VIDEO) != PackageManager.PERMISSION_GRANTED) ||
                (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.READ_MEDIA_IMAGES) != PackageManager.PERMISSION_GRANTED) ||
                (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) ||
                (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.MANAGE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) ||
                (ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED)) {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
                ActivityCompat.requestPermissions(MainActivity.this,
                        new String[]{
                                Manifest.permission.READ_MEDIA_AUDIO,
                                Manifest.permission.READ_MEDIA_IMAGES,
                                Manifest.permission.READ_MEDIA_VIDEO
                        }, 1);

            } else {
                ActivityCompat.requestPermissions(MainActivity.this,
                        new String[]{Manifest.permission.READ_EXTERNAL_STORAGE,
                                Manifest.permission.WRITE_EXTERNAL_STORAGE}, 2);
            }

        } else {

        }
    }

    /*Handle permission request results*/
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 1) {
            boolean allPermissionsGranted = true;
            for (int grantResult : grantResults) {
                if (grantResult != PackageManager.PERMISSION_GRANTED) {
                    allPermissionsGranted = false;
                    break;
                }else {

                }
            }
            if (!allPermissionsGranted) {
                showPermissionRequiredDialog();
            }else{

            }
        }

    }


    private void showPermissionRequiredDialog() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Permission Required")
                .setMessage("This permission is required to access the app.")
                .setPositiveButton("Go to Settings", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        Uri uri = Uri.fromParts("package", getPackageName(), null);
                        intent.setData(uri);
                        startActivity(intent);
                    }
                })
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                })
                .setCancelable(false)
                .show();
    }



    private void fetchSong() {
        final String[] column = {MediaStore.Audio.Media.TITLE,MediaStore.Audio.Media.DURATION,MediaStore.Audio.Media.DATA};
        final String selection = MediaStore.Audio.Media.IS_MUSIC + "!= 0";
        Cursor cursor = getContentResolver().query(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,column,selection,null,null);
        while (cursor.moveToNext()) {
            Songs songData = new Songs(cursor.getString(0),cursor.getString(1),cursor.getString(2));
            if (new File(songData.getPath()).exists()){
                songsList.add(songData);
            }
            recyclerView.setHasFixedSize(true);
            recyclerView.setLayoutManager(new LinearLayoutManager(this));
            AdapterRecycler adapterRecycler = new AdapterRecycler(this,songsList);
            recyclerView.setAdapter(adapterRecycler);
            recyclerView.getAdapter().notifyDataSetChanged();

        }
    }
}