Android - Request Permission dialog not appearing after requestPermissions(activity, permissions[], requestCode)

I have been trying to implement Run-Time permissions. The following is the code snippet for it :

RunTimePermissionsUtil.java

package com.orgzit.android.util; import android.app.Activity; import android.content.Context; import android.content.pm.PackageManager; import android.os.Build; import android.support.v4.app.ActivityCompat; public class RuntimePermissionsUtil { private static boolean shouldAskPermission() { return (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M); } private static boolean shouldAskPermission(Context context, String permission) { if (shouldAskPermission()) { int permissionGrantedResult = ActivityCompat.checkSelfPermission(context, permission); return !(permissionGrantedResult == PackageManager.PERMISSION_GRANTED); } return false; } //TODO Karan 2018-09-20 Still need to investigate on the behaviour of storing in SharedPreferences whether I have asked for the permission before or not public static void checkPermission(Context context, String permission, AskPermissionListener permissionListener) { if (shouldAskPermission(context, permission)) { if (!ActivityCompat.shouldShowRequestPermissionRationale(((Activity)context), permission)) { permissionListener.onNeedPermission(); } else { permissionListener.onPermissionDisabled(); } } else { permissionListener.onPermissionGranted(); } } public interface AskPermissionListener { void onPermissionGranted(); void onNeedPermission(); void onPermissionDisabled(); } } 

Further inside an activity, AddFileActivity, I implement this listener on a Click Event, the code for the same is :

public class AddFileActivity extends DrawerActivity { private static final int CAMERA_REQ_CODE = 1001; private static final int FILE_SELECT_REQ_CODE = 1002; private Activity activity; private RuntimePermissionsUtil.AskPermissionListener askPermissionListener; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); activity = this; init(); getSupportActionBar().setTitle("Add File"); askPermissionListener = new RuntimePermissionsUtil.AskPermissionListener() { @Override public void onPermissionGranted() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); cameraFileUri = getCameraFileUri(); intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraFileUri); startActivityForResult(intent, CAMERA_REQ_CODE); } @Override public void onNeedPermission() { ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.CAMERA}, CAMERA_REQ_CODE); } @Override public void onPermissionDisabled() { Toast.makeText(activity,"App does not have the permission to Open Camera :(", Toast.LENGTH_LONG).show(); } }; } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { Log.d("q","q"); } private void init() { showFileChooser(); } private void showFileChooser() { final CharSequence[] items = {"Open camera", "Select from device", "Cancel"}; AlertDialog.Builder builder = new AlertDialog.Builder(AddFileActivity.this); builder.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int item) { if (items[item].equals("Open camera")) { RuntimePermissionsUtil.checkPermission(activity, Manifest.permission.CAMERA, askPermissionListener); Log.d("d","d"); } else if (items[item].equals("Select from device")) { //DO SOMETHING } else if (items[item].equals("Cancel")) { dialog.dismiss(); } } }); builder.show(); } 

So, all my code executes, and it goes into the onNeedPermissions() code, wherein, it goes to

ActivityCompat.requestPermissions(activity, new String[]{Manifest.permission.CAMERA}, CAMERA_REQ_CODE); 

But, after this, astonishingly, there is no dialog asking for the RunTime Permission for camera, Rather, the dialog closes and displays the activity again.

Can someone please help me regarding this or point out a way to overcome it