判断wifi是2.4G还是5G

1.WifiInfo 源码：

 int mFrequency=wifiInfo.getFrequency();

　　

    /**
     * @hide
     * TODO: makes real freq boundaries
     */
    public boolean is24GHz() {
        return ScanResult.is24GHz(mFrequency);
    }

    /**
     * @hide
     * TODO: makes real freq boundaries
     */
    public boolean is5GHz() {
        return ScanResult.is5GHz(mFrequency);
    }

　2.  ScanResult 代码

  public static boolean is24GHz(int freq) {
        return freq > 2400 && freq < 2500;
    }

    /**
     * @hide
     * TODO: makes real freq boundaries
     */
    public static boolean is5GHz(int freq) {
        return freq > 4900 && freq < 5900;
    }