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:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="300dp"
android:layout_height="wrap_content"
tools:context=".AlertDialogue">
<TextView
android:id="@+id/text_dialog"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="24dp"
android:text="Hello, I'm the dialog text!"
android:textColor="@android:color/darker_gray"
android:textSize="16dp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button_dialog"
android:layout_width="wrap_content"
android:layout_height="36dp"
android:layout_margin="8dp"
android:background="@android:color/transparent"
android:text="Ok"
android:textColor="@android:color/black"
android:textSize="14dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="@+id/text_dialog" />
</android.support.constraint.ConstraintLayout>
Manifest:
<activity android:name=".AlertDialogue"
android:theme="@style/AlertDialogNoTitle">
</activity>
Style:
<style name="AlertDialogNoTitle" parent="Theme.AppCompat.Light.Dialog">
<item name="android:windowNoTitle">true</item>
</style>