机器人如何获得指示何时丢失了互联网连接? [英] android how to get indicate when the internet connection is lost?
问题描述
我开发一个Android的应用程序,我希望得到一个通知,当互联网(WiFi或分组数据连接)连接丢失。在我的方法,我可以得到的连接,状态:
I'm developing an android application and I want to get a notification when the internet (wifi or packet data connection) connection is lost. On my approach I can get the status of the connection as:
private boolean isNetworkAvailable() {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
而在清单中有这样的:
while having this in the Manifest:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
我怎么会被自动通知时,连接丢失?
How could I be notified automatically when the connection is lost?
推荐答案
有关WIFI,你可以注册一个广播接收器为:
For WIFI you could register a broadcast receiver as:
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION);
registerReceiver(broadcastReceiver, intentFilter);
您也可以注册清单中的接收器。
You can also register the receiver in the Manifest.
然后在您的接收器:
@Override
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (action.equals(WifiManager.SUPPLICANT_CONNECTION_CHANGE_ACTION)) {
if (intent.getBooleanExtra(WifiManager.EXTRA_SUPPLICANT_CONNECTED, false)){
//do stuff
} else {
// wifi connection was lost
}
}
}
对于任何类型的数据连接监听器,你可以使用注册为下面的接收器:
For any type of data connection listeners you could use the following receiver registered as:
<receiver android:name=".receiver.ConnectivityReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
</intent-filter>
</receiver>
和您的 ConnectivityReceiver
:
public class ConnectivityReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
}
}
在的onReceive
方法,你可以检查,如果您有互联网连接,或不使用的这个开发商文章。
In the onReceive
method you could check if you have internet connectivity or not using this developer article.
这篇关于机器人如何获得指示何时丢失了互联网连接?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!