Question

我正在尝试通过广播接收器检测互联网连接和断开连接。

我的广播接收器：

public class InternetConnectivityReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        if(isOnline(context))
        {
            Log.e("internet", "connected");
        }
        else
        {
            Log.e("internet", "disconnected");
        }
    }

    public boolean isOnline(Context context) {

        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();
        //should check null because in airplane mode it will be null
        return (netInfo != null && netInfo.isConnected());

    }
}

在清单中：

<receiver
      android:name=".receivers.InternetConnectivityReceiver"
      android:enabled="true"
      android:exported="true">

      <intent-filter>
             <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
      </intent-filter>

</receiver>

我不明白当我连接或断开互联网时为什么onReceive方法会运行两次？

任何人都可以帮助我吗？

更新

这是我的logcat输出：

01-01 17:26:06.640 17883-17883/ir.ac.um.androidhistory E/internet: connected
01-01 17:26:26.270 17883-17883/ir.ac.um.androidhistory E/internet: connected
01-01 17:27:18.990 17883-17883/ir.ac.um.androidhistory E/internet: disconnected
01-01 17:27:37.910 17883-17883/ir.ac.um.androidhistory E/internet: disconnected
01-01 17:27:59.800 17883-17883/ir.ac.um.androidhistory E/internet: connected
01-01 17:28:08.120 17883-17883/ir.ac.um.androidhistory E/internet: connected

接收BroadcastReceiver的方法运行两次

0 个答案: