Error:Execution failed for task ':app:processDebugManifest'.
Manifest merger failed : uses-sdk:minSdkVersion 8 cannot be smaller than version 9 declared in library [com.google.android.gms:play-services:8.4.0] C:\Users\admin\Desktop\RingtoneApp2\app\build\intermediates\exploded-aar\com.google.android.gms\play-services\8.4.0\AndroidManifest.xml Suggestion: use tools:overrideLibrary="com.google.android.gms.all" to force usage
I used the site http://developer.android.com/sdk/installing/migrate.html