Android 判断Service是否已经运行

	private boolean isServiceStart() {
		ActivityManager myManager = (ActivityManager) getApplicationContext()
				.getSystemService(Context.ACTIVITY_SERVICE);
		ArrayList<RunningServiceInfo> runningService = (ArrayList<RunningServiceInfo>) myManager
				.getRunningServices(30);
		for (int i = 0; i < runningService.size(); i++) {
			if (runningService.get(i).service.getClassName().toString()
					.equals("com.**.**.YourService")) {
				return true;
			}
		}
		return false;
	}

原文：http://blog.csdn.net/vvcumt/article/details/39135829