Is there a way to set WIFI proxy in java-client?

Description

I want to use the java client to enable the WIFI and set the Proxy, but it only can enable the WIFI and no way to set the proxy.

Environment

• java client build version : 6.1.0
• Appium Desktop version: 1.6.2
• Mobile platform/version under test: Android 6.0.1
• Real device : Samsung Galaxy A7

Details

I use the BrowserMob Proxy to start a proxy server and then use the Appium to automate the scripts with the proxy and capture the network requests.
The proxy port will be changed in each test, every time i need to set the WIFI proxy manually. so i want to set mobile WIFI proxy with appium automatically. But i only find setConnection api like below code

AndroidDriver driver = new AndroidDriver(new URL("http://127.0.0.1:4723/wd/hub"), cap);
driver.setConnection(new ConnectionStateBuilder().withWiFiEnabled().build());

How can i set the WIFI proxy with appium?

Start with AndroidDriver.setConnection and ConnectionStateBuilder, then check the Java client's Android connection support and the corresponding Appium capability or command. Done means a test can enable Wi-Fi and set a changing Wi-Fi proxy programmatically instead of configuring it manually.