以下是一种使用 ConnectivityManager 类检测慢速网络连接的方法：

private boolean isSlowConnection(Context context) {
   ConnectivityManager cm =
   (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

   if (cm == null) {
      return false;
   }

   NetworkInfo info = cm.getActiveNetworkInfo();
   if (info == null || !info.isConnected()) {
      return false;
   }

   if (info.getType() == ConnectivityManager.TYPE_WIFI) {
      return false;
   }

   //此处设置慢速网络的阈值（kbps）
   int minimumSpeedThreshold = 50;
   int connectionSpeed = info.getSubtype();
    switch (connectionSpeed) {
        case TelephonyManager.NETWORK_TYPE_1xRTT:
            return minimumSpeedThreshold <= 50; 
        case TelephonyManager.NETWORK_TYPE_CDMA:
            return minimumSpeedThreshold <= 14; 
        case TelephonyManager.NETWORK_TYPE_EDGE:
            return minimumSpeedThreshold <= 50; 
        case TelephonyManager.NETWORK_TYPE_EVDO_0:
            return minimumSpeedThreshold <= 400; 
        case TelephonyManager.NETWORK_TYPE_EVDO_A:
            return minimumSpeedThreshold <= 600; 
        case TelephonyManager.NETWORK_TYPE_GPRS:
            return minimumSpeedThreshold <= 100; 
        case TelephonyManager.NETWORK_TYPE_HSDPA:
            return minimumSpeedThreshold <= 2 * 1000; 
        case TelephonyManager.NETWORK_TYPE_HSPA:
            return minimumSpeedThreshold <= 700; 
        case TelephonyManager.NETWORK_TYPE_UMTS:
            return minimumSpeedThreshold <= 400; 
        case TelephonyManager.NETWORK_TYPE_EHRPD:
            return minimumSpeedThreshold <= 1 * 1000; 
        case TelephonyManager.NETWORK_TYPE_EVDO_B:
            return minimumSpeedThreshold <= 5 * 1000; 
        case TelephonyManager.NETWORK_TYPE_HSPAP:
            return minimumSpeedThreshold <= 10 * 1000; 
        case TelephonyManager.NETWORK_TYPE_IDEN:
            return minimumSpeedThreshold <= 25; 
        case TelephonyManager.NETWORK_TYPE_LTE:
            return minimumSpeedThreshold <= 10 * 1000; 
        case TelephonyManager.NETWORK_TYPE_UNKNOWN:
        default:
            return false;
    }
}

以上方法将以kbps为单位测量数据速度并将其与最小速度阈值进行比较。您可以更改 minimumSpeedThreshold 变量的值以设置自己的阈值。对于WiFi连接，此方法总是返回 false。只有移动数据连接才会引发