如何在phonegap中使用android本机代码？

npm install -g phonegap

phonegap create my-app

cd my-app
phonegap platform add android

phonegap plugin create my-plugin

package com.phonegap.plugins.myplugin;

import org.apache.cordova.CordovaPlugin;
import org.apache.cordova.CallbackContext;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class MyPlugin extends CordovaPlugin {
    public static final String ACTION_MY_METHOD = "myMethod";

    @Override
    public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
        if (ACTION_MY_METHOD.equals(action)) {
            String input = args.getString(0);
            String result = myMethod(input);
            callbackContext.success(result);
            return true;
        }
        return false;
    }

    private String myMethod(String input) {
        // Your Android native code here
        return "Hello, " + input;
    }
}

phonegap plugin add my-plugin

cordova.plugins.myPlugin.myMethod("World", function(result) {
    console.log(result);
}, function(error) {
    console.error(error);
});

phonegap run android