This gist is used to create an implement launcher screen in Android app. For further details : http://droidmentor.com/create-launch-screen/

AndroidManifest.xml

<activity 
  android:name=".SplashActivity"
  android:theme="@style/splash_theme"
  android:screenOrientation="portrait">
      <intent-filter>
           <action android:name="android.intent.action.MAIN" />
           <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
</activity>

launcher_screen.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <!-- Splash Screen Background (Color/Image) -->
    <item android:drawable="@drawable/ic_background1" />

    <!-- App Logo which comes center of the Screen due to gravity:"center" -->
    <item>
        <bitmap
            android:gravity="center"
            android:src="@drawable/ic_logo" />
    </item>

</layer-list>

LauncherActivity.java

public class LauncherActivity extends Activity {

    // launcher screen timer
    private static int SPLASH_TIME_OUT = 1000;

    Handler handler;
    Runnable runnable;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        handler = new Handler();
        runnable = new Runnable()
        {
            @Override
            public void run()
            {
                Intent home_activity=new Intent(LauncherActivity.this,HomepageActivity.class);
                startActivity(home_activity);
                finish();
            }
        };
        handler.postDelayed(runnable, SPLASH_TIME_OUT);
    }

    @Override
    public void onBackPressed() {
        super.onBackPressed();
        handler.removeCallbacks(runnable);
    }
}

styles.xml

<style name="launcher_theme" parent="Theme.AppCompat.NoActionBar">
        <item name="android:windowBackground">@drawable/launcher_screen</item>
</style>

very helpful .... thanks alot