关于NetworkInfo对象的isConnected()与isAvailable()

最新推荐文章于 2024-04-18 14:05:36 发布

xiaoxiandroid

最新推荐文章于 2024-04-18 14:05:36 发布

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本文介绍了一个简单的Android应用示例，该应用通过注册广播接收器来监听网络连接的变化，并根据不同网络状态输出相应的信息。

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测试类如下：

        public 
         class 
        MainActivity 
        extends 
        Activity
       
        {
       
        /** Called when the activity is first created. */
       
        @Override
       
        public 
        void 
        onCreate(Bundle savedInstanceState)
       
        {
       
        super
        .onCreate(savedInstanceState);
       
        setContentView(R.layout.main);
       
        this
        .registerReceiver(mBroadcastReceiver, 
        new 
        IntentFilter(
       
        ConnectivityManager.CONNECTIVITY_ACTION));
       
        }
       
        private 
        BroadcastReceiver mBroadcastReceiver = 
        new 
        BroadcastReceiver()
       
        {
       
        @Override
       
        public 
        void 
        onReceive(Context context, Intent intent)
       
        {
       
        Bundle bundle = intent.getExtras();
       
        NetworkInfo aNetworkInfo = (NetworkInfo) bundle
       
        .get(ConnectivityManager.EXTRA_NETWORK_INFO);
       
        if 
        (aNetworkInfo.isConnected())
       
        {
       
        System.out.println(
        "connecte"
        );
       
        } 
        else
       
        {
       
        System.out.println(
        "not connect"
        );
       
        }
       
        if 
        (aNetworkInfo.isAvailable())
       
        {
       
        System.out.println(
        "available"
        );
       
        } 
        else
       
        {
       
        System.out.println(
        "not available"
        );
       
        }
       
        System.out.println(
        "--------------------"
        );
       
        }
       
        };
       
        }