Launch Modes of Activity <activity android:name=".NewsDetailActivity"android:launchMode="singleTop"> <intent-filter> <action android:name="android.intent.action.VIEW"></action> <category android:name="android.intent.category.DEFAULT"></category> <category android:name="android.intent.category.BROWSABLE"></category> <data android:scheme="oauth"android:host="twitt"></data> </intent-filter> </activity> http://ww.intridea.com/blog/2011/6/16/android-understanding-activity-launchmode 9Launch Modes of Activity 9 <activity android:name=".NewsDetailActivity" android:launchMode="singleTop"> <intent-filter> <action android:name="android.intent.action.VIEW"></action> <category android:name="android.intent.category.DEFAULT"></category> <category android:name="android.intent.category.BROWSABLE"></category> <data android:scheme="oauth" android:host="twitt"></data> </intent-filter> </activity> http://www.intridea.com/blog/2011/6/16/android-understanding-activity-launchmode