主要思路:使用Android中的四大組件之:BrocastReceiver監聽網絡狀態的變化。接收到網絡狀態改變的廣播之後判斷當前的網絡是否可用。
創建廣播接收器MyNetworkReceiver
public class MyNetworkReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
//**判斷當前的網絡連接狀態是否可用*/
ConnectivityManager connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo info = connectivityManager.getActiveNetworkInfo();
if ( info != null && info.isAvailable()){
//當前網絡狀態可用
int netType = info.getType();
if (netType == ConnectivityManager.TYPE_WIFI){
Log.e("NETSTATUE", "當前網絡狀態爲-wifi");
}else if (netType == ConnectivityManager.TYPE_MOBILE ){
Log.e("NETSTATUE", "當前網絡狀態爲-mobile");
}
}else {
//當前網絡不可用
Log.e("NETSTATUE", "無網絡連接");
}
}
}
一、BroadcastReceiver的用法之靜態註冊:
在AndroidManifest清單文件中註冊廣播接收器
<receiver
android:name=".MyNetworkReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>
</intent-filter>
</receiver>
二、BroadcastReceiver的用法之動態註冊
可以在Activity的OnCreate()方法中註冊onDestory()方法中註銷
亦可以再Application的onCreate()方法中註冊onTerminate()方法中註銷
註冊:
receiver = new YunNetworkReceiver();
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
registerReceiver(receiver,intentFilter);
註銷:
unregisterReceiver(receiver);