Android(安卓)判断网络连接状态

在Android上，我们需要对不同的网络情况做出一些操作。官方提供了监听网络状态变化的广播，用来监听网络的变化情况。

    private IntentFilter intentFilter;        private NetworkChangeReceiver networkChangeReceiver;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        intentFilter = new IntentFilter();        intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");        networkChangeReceiver = new NetworkChangeReceiver();        registerReceiver(networkChangeReceiver, intentFilter);    }        @Override    protected void onDestroy() {        super.onDestroy();        unregisterReceiver(networkChangeReceiver);    }        class NetworkChangeReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo = manager.getActiveNetworkInfo();            if (networkInfo!=null && networkInfo.isAvailable()) {                Toast.makeText(context, "networdk is available", Toast.LENGTH_SHORT).show();            } else {                Toast.makeText(context, "networdk is unavailable", Toast.LENGTH_SHORT).show();            }        }            }

清单文件需要加上对应的权限：

更多相关文章

随机推荐