Android常用代码-监听网络状态

android系统在网络状态发生变化的时候，会发出 android.net.conn.CONNECTIVITY_CHANGE 广播我们只要注册该广播的监听器即可实现网络状态的监听,代码如下：

在xml里配置receiver：

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

java代码:

public class NetworkStatusReceiver extends BroadcastReceiver {

      @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager mgr = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo[] info = mgr.getAllNetworkInfo();
        if (info != null) {
            for (int i = 0; i < info.length; i++) {
                if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                    // 启动你的服务
                    break;
                }
            }
        }
    }
}