private static void killByLevel8(final ActivityManager activityManager,
final String packageName) throws SecurityException,
NoSuchMethodException, IllegalArgumentException,
IllegalAccessException, InvocationTargetException {
Method killMethod = ActivityManager.class.getDeclaredMethod(
"forceStopPackage", String.class);
killMethod.invoke(activityManager, packageName);
}
<uses-permission android:name="android.permission.FORCE_STOP_PACKAGES"/>