java - 等待网络连接

Question

我需要让我的应用程序等到完全建立 wifi 连接后才能继续运行。我现在有这段代码:

wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE); 
    if(!wifiManager.isWifiEnabled())
    {
        Toast.makeText(this, "Connecting to wifi network", Toast.LENGTH_SHORT).show();
        wifiManager.setWifiEnabled(true);
        //wait for connection to be establisihed and only then proceed


    }

Answer 1

您可以使用注册的广播接收器:

android.net.conn.CONNECTIVITY_CHANGE

监听状态变化并保持当前状态的变量

更多信息 here

---

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

接收者:

public class WifiReceiver extends BroadcastReceiver {

    public static boolean connected = false;

    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager mgr = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = mgr
            .getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        connected = networkInfo != null && networkInfo.isConnected();
    }
}

public boolean isConnected(){
    return connected; 
}