安卓：互联网连接变化监听器 [英] Android: Internet connectivity change listener

问题描述

我已经有这个code监听连接的变化 -

I already have this code which listens connectivity change -

public class NetworkStateReceiver extends BroadcastReceiver {
    public void onReceive(Context context, Intent intent) {
        Log.d("app","Network connectivity change");
        if(intent.getExtras()!=null) {
            NetworkInfo ni=(NetworkInfo) intent.getExtras().get(ConnectivityManager.EXTRA_NETWORK_INFO);
        if(ni!=null && ni.getState()==NetworkInfo.State.CONNECTED) {
            Log.i("app","Network "+ni.getTypeName()+" connected");
        }
        }
        if(intent.getExtras().getBoolean(ConnectivityManager.EXTRA_NO_CONNECTIVITY,Boolean.FALSE)) {
            Log.d("app","There's no network connectivity");
        }
    }
}

和我检查使用这个code互联网连接 - <一个href="http://stackoverflow.com/questions/6493517/detect-if-android-device-has-internet-connection/6493572#6493572">Internet检查

And I check Internet connectivity using this code - Internet Check

但问题是，如果网络突然失去，没有任何连接变化的互联网连接，这code是没用的。有什么办法来建立广播接收器监听互联网连接的变化？我有一个Web应用程序和突然互联网连接的变化可能会引起问题。

But the problem is that if network suddenly loses internet connection without any connectivity change, this code is useless. Is there any way to create Broadcast Receiver listener for Internet connectivity change? I have a web app and sudden Internet connectivity changes can cause problems.

推荐答案

试试这个

    public class NetworkUtil {
    public static int TYPE_WIFI = 1;
    public static int TYPE_MOBILE = 2;
    public static int TYPE_NOT_CONNECTED = 0;
    public static final int NETWORK_STATUS_NOT_CONNECTED=0,NETWORK_STAUS_WIFI=1,NETWORK_STATUS_MOBILE=2;

    public static int getConnectivityStatus(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        if (null != activeNetwork) {
            if(activeNetwork.getType() == ConnectivityManager.TYPE_WIFI)
                return TYPE_WIFI;

            if(activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE)
                return TYPE_MOBILE;
        } 
        return TYPE_NOT_CONNECTED;
    }

    public static int getConnectivityStatusString(Context context) {
        int conn = NetworkUtil.getConnectivityStatus(context);
        int status = 0;
        if (conn == NetworkUtil.TYPE_WIFI) {
            status = NETWORK_STAUS_WIFI;
        } else if (conn == NetworkUtil.TYPE_MOBILE) {
            status =NETWORK_STATUS_MOBILE;
        } else if (conn == NetworkUtil.TYPE_NOT_CONNECTED) {
            status = NETWORK_STATUS_NOT_CONNECTED;
        }
        return status;
    }
}

和为的BroadcastReceiver

And for the BroadcastReceiver

public class NetworkChangeReceiver extends BroadcastReceiver {

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

        int status = NetworkUtil.getConnectivityStatusString(context);
        Log.e("Sulod sa network reciever", "Sulod sa network reciever");
        if (!"android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
            if(status==NetworkUtil.NETWORK_STATUS_NOT_CONNECTED){
                new ForceExitPause(context).execute();
            }else{
                new ResumeForceExitPause(context).execute();
            }

       }
    }
}

不要忘了把这个变成你的Andr​​oidManifest.xml

Don't forget to put this into your AndroidManifest.xml

 <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 <uses-permission android:name="android.permission.INTERNET" />
 <receiver
        android:name="NetworkChangeReceiver"
        android:label="NetworkChangeReceiver" >
        <intent-filter>
            <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
            <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
        </intent-filter>
    </receiver>

希望这会帮助你干杯！

Hope this will help you Cheers!

这篇关于安卓：互联网连接变化监听器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！