显示由活动创建的不带标题的对话框

Question

I am showing a dialog made from Activity. The dialog activity has set no title in onCreate() callback:

public class MyDialogActivity extends AppCompatActivity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // set window feature no title
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.my_dialog);
    ...
  }
  ...
}

I defined a style for the activity:

<style name="Theme.MyDialog" parent="@style/Theme.AppCompat.Light.Dialog">
     <item name="android:windowFrame">@null</item>
     <item name="android:windowIsFloating">true</item>
     <item name="android:windowContentOverlay">@null</item>
     <item name="android:windowIsTranslucent">true</item>
     <item name="android:windowNoTitle">true</item>
     <item name="android:windowActionBar">false</item>
     <item name="background">@android:color/transparent</item>
     <item name="android:windowBackground">@drawable/my_bg</item>
 </style>

And in AndroidManifest.xml:

<activity
       android:name=".MyDialogActivity"
       android:theme="@style/Theme.MyDialog">
</activity>

But when I show the dialog, there is always a title(which shows my app's name) on the dialog.

It is weird not only because it still shows title, but also shows my app's name as title, as you can see, I haven't set any title. It looks like an Android default behaviour, but...how to get rid of the title?

(I am running on Android 5.1.1)

Answer 1

You can try adding the following style to your Activity for imitating a dialog:

<style name="Theme.AppCompat.TranslucentDialog" parent="Theme.AppCompat.NoActionBar">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowBackground">@color/colorTransparent</item>
    <item name="android:colorBackgroundCacheHint">@null</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowAnimationStyle">@android:style/Animation</item>
</style>

where colorTransparent is the following:

<color name="colorTransparent">#64000000</color>

Then use it with:

<activity
     android:name=".MyDialogActivity"
     android:theme="@style/Theme.AppCompat.TranslucentDialog">
</activity>