Android 如何检查服务是否正在运行

我想显示服务状态，如果它正在运行或已停止。我正在使用下面的代码，但它在开始服务之前显示“已停止”。服务启动时显示“正在运行”。当它再次停止时，只显示“正在运行”。我是否在设置SharedReference状态时出错。 主要活动

  onCreate()
  {
   checkServiceStatus() ;
  }

  private void checkServiceStatus() 
{
    Toast.makeText(getApplicationContext(),"in enableControls", Toast.LENGTH_LONG).show();
    boolean isServiceRunning = AppSettings.getServiceRunning(this);     
    if (isServiceRunning)
    {
        Toast.makeText(getApplicationContext(),"service running", Toast.LENGTH_LONG).show();    
    } 
    else 
    {   
        Toast.makeText(getApplicationContext(),"service stopped", Toast.LENGTH_LONG).show();        
    }
}


  public class AppSettings 
  {
 public static final String SERVICE_STATE = "isServiceRunning";
 public static boolean getServiceRunning(Context context){
         SharedPreferences pref = context.getSharedPreferences(GPSLOGGER_PREF_NAME, 0);

         return pref.getBoolean(SERVICE_STATE, false);
 }

 public static void setServiceRunning(Context context, boolean isRunning){
         SharedPreferences pref = context.getSharedPreferences(GPSLOGGER_PREF_NAME, 0);
         SharedPreferences.Editor editor = pref.edit();

         editor.putBoolean(SERVICE_STATE, isRunning);
         editor.commit();
 }

---

我想这是用来检查互联网连接的

 public static boolean CheckServiceConnectivity(Context mContext) 
     {
        ConnectivityManager connec = (ConnectivityManager) mContext.getSystemService(Context.CONNECTIVITY_SERVICE);

        if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED
                || connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED)
            return true;

        return false;

    }

public class Receiver extends BroadcastReceiver {       
    @Override
    public void onReceive(Context context, Intent intent) {    
        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
            if (YourService.class.getName().equals(service.service.getClassName())) {
                //your service is running
            }
        }
        //your service is not running
    }
}

 ActivityManager manager = (ActivityManager)context.   getSystemService(Context.ACTIVITY_SERVICE);//use context received in broadcastreceiver

for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE))
 {

     if (MyService.class.getName().equals(service.service.getClassName())) {
                         //running 
        }
    else{
          //not running 
        }

 }