Android 判断网络wifi是否可用工具类

import android.content.Context
import android.net.ConnectivityManager
import android.net.NetworkCapabilities
import android.os.Build
 
fun isWifiAvailable(context: Context): Boolean {
    val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
 
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        val network = cm.activeNetwork ?: return false
        val capabilities = cm.getNetworkCapabilities(network) ?: return false
 
        return capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
    } else {
        val networkInfo = cm.activeNetworkInfo ?: return false
 
        return networkInfo.isConnected && networkInfo.type == ConnectivityManager.TYPE_WIFI
    }
}
 

使用 

if (isWifiAvailable(this)) {
    // WiFi 可用
} else {
    // WiFi 不可用
}
 

注意：需要在 AndroidManifest.xml 文件中添加以下权限：

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