Permissions in MainActivity

MainActivity.java

    static final Integer CAMERA = 0x5;
    
    // ...
    // @Override
    // protected void onCreate(Bundle savedInstanceState) {
    // ...
    //      public void onClick(View v) {    

                if(ask()) {
                    
                    // Intent intent = new Intent(MainActivity.this, CameraActivity.class);
                    // startActivity(intent);
                    
                }

    // ...
    // }

    private boolean askForPermission(String permission, Integer requestCode) {
        if (ContextCompat.checkSelfPermission(MainActivity.this, permission) != PackageManager.PERMISSION_GRANTED) {
            if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, permission)) {
                ActivityCompat.requestPermissions(MainActivity.this, new String[]{permission}, requestCode);
            } else {
                ActivityCompat.requestPermissions(MainActivity.this, new String[]{permission}, requestCode);
            }
            return false;
        } else {
            Toast.makeText(this, "" + permission + " is already granted.", Toast.LENGTH_SHORT).show();
            return true;
        }
    }

    public boolean ask() {
        boolean answer = false;
                if (askForPermission(Manifest.permission.CAMERA, CAMERA)) {
                    answer= true;
        } else {
            answer=false;
        }
        return answer;
    }



    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
          super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (ActivityCompat.checkSelfPermission(MainActivity.this, permissions[0]) == PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(this, "Permission granted", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(this, "Permission denied", Toast.LENGTH_SHORT).show();
        }
    }