接收一次性广播，开启服务永久监听

 

接收一次性广播，开启服务永久监听

 

出处：http://blog.csdn.net/djy1992/article/details/9629741 需代码留邮箱

如果现在系统只发送一个一次性广播（比如开机启动），

接收器只识别一次，因为系统不继续发送该广播了；

现在是要在这种情况下开启服务（开机启动服务），

而且要连续的监听变化（如：网络改变时，该服务启动），该怎么处理？

 

第一步：在manifest注册广播接收器，

 <receiver android:name=".service.ClientUpdateReceiver">
        <intent-filter>
  　　<action android:name="android.intent.action.BOOT_COMPLETED"/>// 开机启动发送的广播命令 

     <category android:name="android.intent.category.HOME"/>
　  </intent-filter>
 </receiver>

第二步：在代码中编写广播接收器，

public class ClientUpdateReceiver extends BroadcastReceiver
{

    @Override
    public void onReceive(Context context, Intent intent)
    {

            Intent i = new Intent();
            i.setAction("zte.com.market.service");
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            context.startService(i);
    }

}

第三步：编写service类，其中需要另外编写一个广播接收器，方便实时接受广播， 

public class UpdateService extends Service
{
  private ConnectivityManager connectivityManager;
  private NetworkInfo info;

  private BroadcastReceiver mReceiver = new BroadcastReceiver() {

      @Override
      public void onReceive(Context context, Intent intent) {
          String action = intent.getAction();
          if (action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
              Log.d("Jeny", "网络状态已经改变");
              connectivityManager = (ConnectivityManager)      
                                       getSystemService(Context.CONNECTIVITY_SERVICE);
              info = connectivityManager.getActiveNetworkInfo();  
              if(info != null && info.isAvailable()) {
                  String name = info.getTypeName();
                  Log.d("Jeny", "当前网络名称：" + name);
                  Intent i = new Intent();
                  i.setAction("zte.com.market.service");
                  i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

                  context.startService(i);// 开启服务
           } else {
                  Log.d("Jeny", "没有可用网络");
              }
          }
      }
  };
    
    @Override
    public IBinder onBind(Intent arg0)
    {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public void onDestroy()
    {
        // TODO Auto-generated method stub
        super.onDestroy();
        Log.v("Jeny", "[UpdateService]...onDestroy");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
        // TODO Auto-generated method stub
              
        ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mobileInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        NetworkInfo wifiInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        Log.v("Jeny", "mobileInfo.isConnected()------->"+mobileInfo.isConnected()+"   wifiInfo.isConnected()---------->"+wifiInfo.isConnected());
        if(mobileInfo.isConnected() || wifiInfo.isConnected()){
            
         }
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onCreate()
    {
        // TODO Auto-generated method stub
        super.onCreate();
        IntentFilter mFilter = new IntentFilter();
        mFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
        registerReceiver(mReceiver, mFilter);// 开机启动时首次开启服务后注册接收器
     }

}

 

到此结束！