public void android6permission{
          String[] permissions = {
                "android.permission.CAMERA",
                "android.hardware.camera",
                "android.permission.ACCESS_COARSE_LOCATION",
                "android.permission.WRITE_EXTERNAL_STORAGE",
                "android.permission.READ_EXTERNAL_STORAGE"
        };


        requestPermissions(permissions, 122323);

    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        switch (requestCode) {
            case 122323: {
                if (grantResults[0] ==
                        PackageManager.PERMISSION_GRANTED){
                    // Do task
                } else {
                    Toast.makeText(getApplicationContext(),"Access denied",Toast.LENGTH_SHORT).show();

                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                }
                return;
            }
        }
    }