Android: make a splash screen until the app is ready

In Android it’s easy to make a splash screen not time based, but showed only until the application is not ready. First of all we have to create a drawable xml file. This file will be the splash screen.

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
  <!-- The background color, preferably the same as your normal theme -->
  <item android:drawable="@android:color/white"/>
  <!-- Your product logo - 144dp color version of your app icon -->
  <item>
    <bitmap
      android:src="@drawable/product_logo_144dp"
      android:gravity="center"/>
  </item>
</layer-list>

Then we have to set it into our own theme, in the styles.xml file. For example, like this:

<resources>
 <!-- Base application theme. -->
 <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
    <item name="android:windowBackground">@drawable/splash_screen</item>
 </style>
</resources>

Now you can try to set the theme in the manifest.xml (android:theme=”@style/AppTheme” under the application tag) and launch the application! If you try you can see that the image is still showed as your application background; it’s not very nice. Here you have two ways to restore your normal background.

1. Create a second different theme in the styles.xml with the android:windowBackground wanted. Then set the theme in the activity.
   

   public class MyMainActivity extends AppCompatActivity {
    @Override
     protected void onCreate(Bundle savedInstanceState) {
       // Make sure this is before calling super.onCreate
       setTheme(R.style.Theme_MyApp);
       super.onCreate(savedInstanceState);
       // ...
     }
   }

2. In the activity set the drawable window, maybe useful if it’s a single color.
   

   public class MyMainActivity extends AppCompatActivity {
    @Override
     protected void onCreate(Bundle savedInstanceState) 
       super.onCreate(savedInstanceState);
       // ...
       getWindow().setBackgroundDrawable(new ColorDrawable(Color.WHITE));
     }
   }

That’s all! Enjoy your splash screen!

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