拷贝 unity 的 classes.jar (/Applications/Unity/PlaybackEngines/AndroidPlayer/Variations/mono/Release/Classes\classes.jar) 到 项目 app/libs 目录下，右键 classes.jar→Add As Library

MainActivity 删除 setContentView 行代码, 删除 layout 下 activity_main.xml

修改 build.gradle apply plugin: 'com.android.application 改成 apply plugin: 'com.android.library , 删除 defaultConfig 下的 applicaionId 行

在 /Applications/Unity/Hub/Editor/2020.1.13f1/PlaybackEngines/AndroidPlayer/Source/com/unity3d/player/UnityPlayerActivity.java 找到 UnityPlayerActivity.java , 直接拷贝source 目录下的 com 包到 java文件夹

修改 AndroidManifest.xml

private Class> unityPlayerClass; private Field unityCurrentActivity; private Method unitySendMessage; public void init () { //Get the UnityPlayer class using Reflection unityPlayerClass = Class.forName("com.unity3d.player.UnityPlayer"); //Get the currentActivity field unityCurrentActivity= unityPlayerClass.getField("currentActivity"); //Get the UnitySendMessage method unitySendMessage = unityPlayerClass.getMethod("UnitySendMessage", new Class [] { String.class, String.class, String.class } ); //Use this method to get UnityPlayer.currentActivity public Activity currentActivity () { Activity activity = (Activity) unityCurrentActivity.get(unityPlayerClass); return activity; public void unitySendMessageInvoke (String gameObject, String methodName, String param) { //Invoke the UnitySendMessage Method unitySendMessage.invoke(null, new Object[] { gameObject, methodName, param} ); public void makeToast (final String toastText, final int duration) { currentActivity().runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(getActivity(), toastText, duration).show(); // 别忘了调用 private void listenSDKData() { currentActivity().runOnUiThread(new Runnable() { @Override public void run() { MotrixiSDK.INSTANCE.setOnLogListener(new OnLogListener() { @Override public void onLogListener(String s) { unitySendMessageInvoke("UnityAndroidConnect", "AndroidCallUnityMsg", s);

Build->Make Project，一般只要 build/intermediates/arr_main_jar/debug/classes.jar 就行

用压缩包打开jar 包，删除 com 目录下的 unity3D和 项目名最底层文件夹里的 BuildConfig.class

把上述项目的 AndroidManifest.xml 和 导出的 classes.jar(可以改名)放到unity 中，路径如下

jar 放到 Assets/Plugins/Android/libs 下

在 /Applications/Unity/Hub/Editor/2020.1.13f1/PlaybackEngines/AndroidPlayer/Tools/GradleTemplates 路径下有 gradle 模板，把需要用到的放到 unity 项目 Assets/Plugins/Android 下:

BaseProjectTemplate.gradle: project 路径下的gradle

gradleTemplate: gradle 配置

mainTemplate: module 下的 gradle

Unity 创建一个GameObject，命名与自定义java class 文件中的 gameObject 名字一致, Assets 下创建一个cs文件，关联到GameObject.

cs 文件如下：

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class UnityAndroidConnect : MonoBehaviour
    private string appKey = "";
        // 两个按钮
    private GameObject resetButton;
    private GameObject uploadButton;
        // 文本框
    private GameObject informationLabel;
        // 文本框的文字
    public Text informtaionText;
    // AndroidJavaClass jc;
    AndroidJavaObject androidInstance; 
    // Start is called before the first frame update
    void Start()
                        //参数就是jar 包的项目package name
            androidInstance = new AndroidJavaObject("com.motrixi.unity.plugin.Motrixi");
            if (null != androidInstance) 
                                // 参数为自定义 java 文件里的方法
                androidInstance.Call("initPlugin");
                                androidInstance.Call("init", appKey)
        catch (Exception e)
            Debug.Log( "init error:" + e.ToString());
                // 获取 resetButton
        resetButton = GameObject.Find("ResetButton");
        resetButton.GetComponent().onClick.AddListener(Reset);
        uploadButton = GameObject.Find("UploadButton");
        uploadButton.GetComponent().onClick.AddListener(DebugUpload);
        informationLabel = GameObject.Find("SdkInformationArea");
        informtaionText = GameObject.Find("SdkInformationArea").GetComponent();
     public void Reset()
                Debug.Log("Reset Clicked. ClickHandler.");
                androidInstance.Call("resetConsentForm");
        catch (Exception e)
                Debug.Log( "reset button error:" + e.ToString());
     public void DebugUpload()
                Debug.Log("DebugUpload Clicked. ClickHandler.");
                androidInstance.Call("upload");
        catch (Exception e)
                Debug.Log( "DebugUpload button error:" + e.ToString());
        // java 传给 unity 的方法
     public void AndroidCallUnityMsg(string recvMsg)
        Debug.Log("recvMsg:" + recvMsg);
        informtaionText.text = recvMsg;
    // Update is called once per frame
    void Update()
导出Android项目就可以了