AlertDialog wont work with custom layout

Question

what i am trying to built a user-experience dialog with rating and comments.

I have built the dialog and everything works but when i press the possitive button it crashes for some reason...

My onCreate()

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.user_profile);
        rateButton = (FloatingActionButton) findViewById(R.id.rate);
        shareButton = (FloatingActionButton) findViewById(R.id.share);
        ratingBar = (RatingBar) findViewById(R.id.ratingBar);
        ratingComment = (EditText) findViewById(R.id.ratingComment);
        ratingNum = (TextView) findViewById(R.id.ratingNum);
        ratingCommentText = (TextView) findViewById(R.id.Comment);
        setupButtonEvents();

    }

the setupButtonEvents()

private void setupButtonEvents() {
        rateButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final AlertDialog.Builder builder = new AlertDialog.Builder(UserProfile.this);
                View newLayout = getLayoutInflater().inflate(R.layout.rate_dialog,(ViewGroup)findViewById(R.id.rootLayout));
                builder.setView(newLayout)
                        .setTitle(getString(R.string.rateDialogTitle))
                        .setPositiveButton(R.string.posButtonRate, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                insertDataToDatabaseFromRating();
                            }
                        }).create();
                builder.show();
            }
        });

and the insertDataToDatabaseFromRating()

private void insertDataToDatabaseFromRating() {
        ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
            @Override
            public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
                percent = (int) ratingBar.getRating();
                ratingNum.setText("" + percent);
            }
        });
        comTxt = ratingComment.getText().toString();
        if (!comTxt.isEmpty()) {
            ratingCommentText.setText(comTxt);
        }
    }

The Logcat out Error

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.RatingBar.setOnRatingBarChangeListener(android.widget.RatingBar$OnRatingBarChangeListener)' on a null object reference
            at com.order.app.order.UserProfile.insertDataToDatabaseFromRating(UserProfile.java:144)

Line 144: ratingBar.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {

Can anyone help me out with this??? Thanks in advance!!!!

Answer 1

Probably RatingBar is inside AlertDialog layout. to access views from AlertDialog layout use view object which is passed in builder.setView(newLayout).

In your case add View parameter to insertDataToDatabaseFromRating method then access RatingBar as:

private void insertDataToDatabaseFromRating(View view) {
 ratingBar = (RatingBar)view. findViewById(R.id.ratingBar);
 .....
}

and pass newLayout object to insertDataToDatabaseFromRating when calling.

Do same for other views which want to access from AlertDialog