java - 检查Android中Wi-Fi和移动数据连接的各种模式

Question

我想为不同模式的 Wi-Fi 连接和移动数据编写一个事件。

1. 如果 Wi-Fi 已开启且移动数据已关闭，Wi-Fi 图标将可见
2. 如果移动数据已开启且 Wi-Fi 已关闭，则会显示移动数据图标
3. 如果两者都打开，则两个图标都将可见
4. 如果两者都关闭，则图标将消失
5. 如果两者都打开，其中一个熄灭，则熄灭的图标将熄灭

和手机的系统性能一模一样！‍‍‍‍‍‍</p>

public class NetworkReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {

        final ConnectivityManager cm = (ConnectivityManager)
                context.getSystemService(Context.CONNECTIVITY_SERVICE);
        final android.net.NetworkInfo wifiType = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        final android.net.NetworkInfo mobileType = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if (wifiType.isConnectedOrConnecting()) {
            wifi.setVisibility(View.VISIBLE);
        } else if (mobileType.isConnectedOrConnecting()) {
            data.setVisibility(View.VISIBLE);
        } else if (wifiType.isConnectedOrConnecting() || mobileType.isConnectedOrConnecting()) {
            wifi.setVisibility(View.VISIBLE);
            data.setVisibility(View.VISIBLE);
        } else {
            wifi.setVisibility(View.GONE);
            data.setVisibility(View.GONE);
        }

    }

}

Answer 1

您必须修改代码才能正常工作。

public class NetworkReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
        assert connectivityManager != null;
        NetworkInfo[] activeNetworkInfo = connectivityManager.getAllNetworkInfo();
        for (NetworkInfo ni : activeNetworkInfo) {
            if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                if (ni.isConnected())
                   {
                    wifi.setVisibility(View.VISIBLE);
                   } else if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                if (ni.isConnected())
                   { 
                    data.setVisibility(View.VISIBLE);
                   }else {
            wifi.setVisibility(View.GONE);
            data.setVisibility(View.GONE);
        }
    }
}

确保将此行添加到清单中：

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

我还认为您在添加此代码时弄错了：

 else if (wifiType.isConnectedOrConnecting() || mobileType.isConnectedOrConnecting()) {
            wifi.setVisibility(View.VISIBLE);
            data.setVisibility(View.VISIBLE);
        } 

它没有任何意义，因为您已经测试了其中一个是否已连接，因此我建议改为更改代码：

public class NetworkReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
        assert connectivityManager != null;
        NetworkInfo[] activeNetworkInfo = connectivityManager.getAllNetworkInfo();
        for (NetworkInfo ni : activeNetworkInfo) {
            if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                if (ni.isConnected())
                   {
                    wifi.setVisibility(View.VISIBLE);
                   } else {
                      wifi.setVisibility(View.GONE);
                      }
            if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                  if (ni.isConnected())
                   { 
                    data.setVisibility(View.VISIBLE);
                   }
                 else {
            data.setVisibility(View.GONE);
        }
    }
}