Android get current running application

ActivityManager am = (ActivityManager) mContext
				.getSystemService(Activity.ACTIVITY_SERVICE);
		String packageName = am.getRunningTasks(1).get(0).topActivity
				.getPackageName();
		Log.v(TAG, "checkRunningTasks:" + packageName);

运行了一下，基本没问题，就不知道有没有什么灰色地带。