Android Dialog: Removing title bar

Question

I have a weird behavior I can\'t pinpoint the source of.

I have my app with the classic

requestWindowFeature(Window.FEATURE_NO_TITLE);

Answer 1

I'm using next variant:

Activity of my custom Dialog:

public class AlertDialogue extends AppCompatActivity {

    Button btnOk;
    TextView textDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_alert_dialogue);

        textDialog = (TextView)findViewById(R.id.text_dialog) ;
        textDialog.setText("Hello, I'm the dialog text!");

        btnOk = (Button) findViewById(R.id.button_dialog);
        btnOk.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }
}

activity_alert_dialogue.xml:

Manifest:

Style: