Android : 检查 3G 或 Wifi 网络是否在 android 设备上打开或可用 [英] Android : Check 3G or Wifi network is ON or Available or not on android Device

问题描述

如何以编程方式检查 Android 设备上的网络是否可用，当我们尝试连接 Wifi & 等网络时会抛出消息或 toast 消息.3G.

How to check that network is available or not on android device programmatically, which throws a message or toast message when we are trying to connect with a network such as Wifi & 3G.

推荐答案

要检查网络(即 3G 或 WiFi)是否可用，我们可以在开始活动之前使用以下方法进行验证.

TO check whether network i.e 3G or WiFi is available or not we can use below methods to verify before starting our activities.

ConnectivityManager manager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);

//For 3G check
boolean is3g = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
            .isConnectedOrConnecting();
//For WiFi Check
boolean isWifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
            .isConnectedOrConnecting();

System.out.println(is3g + " net " + isWifi);

if (!is3g && !isWifi) 
{ 
Toast.makeText(getApplicationContext(),"Please make sure your Network Connection is ON ",Toast.LENGTH_LONG).show();
} 
 else 
{ 
        " Your method what you want to do "
} 

希望这会对某人有所帮助.

Hope this will help someone.

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