Android

Question

我想检查互联网和 Wi-Fi 连接。我已经实现了代码。但是在这段代码中，问题是，当我在我的设备中激活 Wi-Fi 时，它会连续敬酒 "Wi-Fi disconnected" 和 "Internet Connected" 3-4 次，然后最后一次敬酒 "Wi-Fi connected" 然后我的 Wi-Fi 连接在我的设备中显示为已启用。当我启用或禁用 Wi-Fi 时，我只需要检查一次 Wi-Fi 连接。谢谢

Java

public class ConnectionReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        boolean isConnectedInternet = 
                intent.getBooleanExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);

        ConnectivityManager wifiConn = 
                (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);

        NetworkInfo mWifi = wifiConn.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        if (mWifi.isConnected()) {

            Toast.makeText(context, "Wifi Conected", Toast.LENGTH_LONG).show();
        }
        else {

            Toast.makeText(context, "Wifi disconnected", Toast.LENGTH_LONG).show();
        }

        if(isConnectedInternet){
            Toast.makeText(context, "Internet Connection Lost", Toast.LENGTH_LONG).show();
        }
        else{
            Toast.makeText(context, "Internet Connected", Toast.LENGTH_LONG).show();
        }
    }

}

月经

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

<receiver android:name=".ConnectionReceiver" >
            <intent-filter>
                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
                <action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
                <action android:name="android.net.wifi.STATE_CHANGE" />
            </intent-filter>
        </receiver>

Answer 1

我不太清楚，但可能是您一次性收到所有事件（CONECTIVITY_CHANGE、WIFI_STATE_CHANGED 和 STATE_CHANGE）。以我的理解 CONNECTIVITY_CHANGE 应该足够了。您应该阅读开发文档中的详细信息。

从清单中删除这两行：

<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />
<action android:name="android.net.wifi.STATE_CHANGE" />

查看文档：http://developer.android.com/reference/android/net/ConnectivityManager.html#CONNECTIVITY_ACTION

Answer 2

我有我的连接，你可以使用它..

      public class ConnectionDetector {
        private Context _context;
        public ConnectionDetector(Context context){
        this._context = context;
        }

        public boolean isConnectingToInternet(){
        ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity != null)
        {
        NetworkInfo[] info = connectivity.getAllNetworkInfo();
        if (info != null)
        for (int i = 0; i < info.length; i++)
            if (info[i].getState() == NetworkInfo.State.CONNECTED){
                return true;
             }

        }
        return false;
        }
}

在你的 activity..

if (new ConnectionDetector(this).isConnectingToInternet()){
         Toast.makeText(context, "Wifi Conected", Toast.LENGTH_LONG).show();
        }
        else {

            Toast.makeText(context, "Wifi disconnected", Toast.LENGTH_LONG).show();
        }

Android - 在 BroadcastReceiver 的帮助下检查互联网和 Wi-Fi 连接？

Android - check internet and Wi-Fi connectivity with the help of BroadcastReceiver?

java

android-intent

android-wifi

android-broadcast