检测3G或Wifi网络恢复

Question

是否可以实现PhoneStateListener（或任何其他机制）来检测3G或Wifi网络连接何时恢复？

我在API的摘要中看到了LISTEN_DATA_CONNECTION_STATE和LISTEN_DATA_ACTIVITY（蜂窝）。这是否意味着3G？

谢谢

Answer 1

更好的方法是使用android.net.ConnectivityManager类。注册接收机并监听广播。

private class ConnectionMonitor extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     String action = intent.getAction(); 
     if (!action.equals(ConnectivityManager.CONNECTIVITY_ACTION)) { 
      return; 
     } 
     boolean noConnectivity = intent.getBooleanExtra(
      ConnectivityManager.EXTRA_NO_CONNECTIVITY, false); 
     NetworkInfo aNetworkInfo = (NetworkInfo) intent 
      .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO); 
     if (!noConnectivity) { 
      if ((aNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE) 
       || (aNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI)) { 
       // Handle connected case 
      } 
     } else { 
      if ((aNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE) 
       || (aNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI)) { 
       // Handle disconnected case 
      } 
     } 
    } 
} 

private synchronized void startMonitoringConnection() { 
    IntentFilter aFilter = new IntentFilter(
     ConnectivityManager.CONNECTIVITY_ACTION); 
    registerReceiver(mConnectionReceiver, aFilter); 
} 
private synchronized void stopMonitoringConnection() { 
    unregisterReceiver(mConnectionReceiver); 
} 

其中

mConnectionReceiver = new ConnectionMonitor();