Unity Android交互自动安装更新

樂开始做一个安卓小游戏，没有想到要去热更新它，结果做完才想到，有bug怎么办…

于是就有了下面的踩坑之旅。

• Unity 2020.3.20f1c1
• Android Studio 4.1.3

1. 新建一个Empty Activity项目

2. 点击完成后，删除红框内容无用内容

   变更后的AndroidManifest.xml文件

3. 添加一个测试的静态方法

4. 修改继承自Activity

5. 修改构建文件

6. 构建arr包

7. 新建一个Unity工程

8. Build Settings… Ctrl+Shift+B

   切换至Android平台

9. 将生成好的arr包放入PluginsAndroid目录下

10. 新建脚本调用它

    新建Test脚本文件

    using UnityEngine;
    using UnityEngine.UI;
    
    public class Test : MonoBehaviour
    {
        public Text showResult;
    
        private void Start()
        {
            var jo = new AndroidJavaObject("cn.linyisonger.android.MainActivity");
            int sum = jo.CallStatic("add", 1, 3);
            showResult.text = sum.ToString();
        }
    }
    

    新建一个Text随便改改样式、将脚本挂在Canvas上(当然挂在那里都是可以的，我就随便挂一下)、将Text组件拖至脚本的showResult字段上。

11. 打包测试

    添加场景、选择运行设备、构建并运行

12. 效果

示意图 有点糙

1. 将classes.jar包引入项目中来D:Unity2020.3.20f1c1EditorDataPlaybackEnginesAndroidPlayerVariationsmonoReleaseClasses

   右键添加类库

2. 将classes.jar设置为仅编译时构建，打包时不包含此文件（Unity打包会带上）

   implementation files('libs\classes.jar') // 当前
   compileOnly fileTree(dir: "libs",includes: ["*.jar"]) // 修改
   

3. 添加安装方法

   MainActivity.java

   package cn.linyisonger.callme;
    
   import androidx.core.content.FileProvider;
   
   import android.app.Activity;
   import android.content.Intent;
   import android.net.Uri;
   import android.os.Build;
   import android.os.Bundle;
   
   import com.unity3d.player.UnityPlayer;
   
   import java.io.File;
   
   public class MainActivity extends Activity {
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
       }
   
       public static int add(int a, int b) {
           return a + b;
       }
   
       public static void install(String apkFullPath){
           Intent intent = new Intent(Intent.ACTION_VIEW);
           File file = new File(apkFullPath);
           if (Build.VERSION.SDK_INT >= 24) {
               Uri apkUri = FileProvider.getUriForFile(UnityPlayer.currentActivity.getApplicationContext(), UnityPlayer.currentActivity.getPackageName() +".fileprovider", file);
               intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
               intent.setDataAndType(apkUri, "application/vnd.android.package-archive");
           } else {
               intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
               Uri uri = Uri.fromFile(file);
               intent.setDataAndType(uri, "application/vnd.android.package-archive");
           }
           UnityPlayer.currentActivity.startActivity(intent);
       }
   
   }
   

4. 构建arr包放置在Unity工程中

5. 设置包名

6. 添加filepaths.xml文件，放在Android/res/xml下

7. 添加AndroidManifest.xml文件，放在Android下

8. 添加更新脚本

   using System;
   using System.Collections;
   using System.IO;
   using UnityEngine;
   using UnityEngine.Networking;
   using UnityEngine.UI;
   
   public class Test1 : MonoBehaviour
   {
   
       /// 
   
       /// 版本模型
       /// 
    
       public class VersionModel
       {
           /// 
   
           /// Id
           /// 
           public long id;
           /// 
   
           /// 程序Key值
           /// 
           public string key;
           /// 
   
           /// 编号
           /// 
           public string no;
           /// 
   
           /// 描述
           /// 
           public string desc;
           /// 
   
           ///  安卓包路径
           /// 
           public string apkUrl;
       }
       public delegate void LoadingAction(float progress);
       public delegate void VersionAction(VersionModel version);
       private VersionModel CurrentVersion;
   
       private string path => Application.persistentDataPath + "/update.apk";
   
       public Text UpdateText;
   
   
       private void Start()
       {
           StartCoroutine(GetCurrentVersion((v) =>
           {
               if (v.no != Application.version)
               {
                   StartCoroutine(Download((p) =>
                   {
                       // 下载进度
                       UpdateText.text = (p * 100).ToString("0.00");
                   },
                   () =>
                   {
                       // 下载完成
                       UpdateText.text = "下载完成";
                       // 安装
                       Install();
                   }));
               }
           }));
   
   
   
       }
   
       public IEnumerator GetCurrentVersion(VersionAction action)
       {
           UnityWebRequest webRequest = UnityWebRequest.Get("http://y.linyisonger.cn/api/version/GetTheLatestVersion?key=cn.LinYisonger.CallAndroid");
           yield return webRequest.SendWebRequest();
           CurrentVersion = JsonUtility.FromJson(webRequest.downloadHandler.text);
           action.Invoke(CurrentVersion);
       }
       public IEnumerator Download(LoadingAction loading, Action done)
       {
           UnityWebRequest webRequest = UnityWebRequest.Get(CurrentVersion.apkUrl);
           webRequest.SendWebRequest();
           while (!webRequest.isDone)
           {
               loading(webRequest.downloadProgress);
               yield return 0;
           }
           File.WriteAllBytes(path, webRequest.downloadHandler.data);
           done();
           yield return null;
       }
       public void Install()
       {
           var jo = new AndroidJavaObject("cn.linyisonger.callme.MainActivity");
           jo.CallStatic("install", path);
       }
   }
   

9. 构建调试然后就会报错廊

   WARNING: The option setting 'android.enableR8=false' is deprecated.
   It will be removed in version 5.0 of the Android Gradle plugin.
   You will no longer be able to disable R8
   

   将构建的版本调整为3.4.0

10. 构建调试打开应用闪退啦! 

    找了很久原来是少引用了依赖库

    # 添加依赖支持
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    

11. 构建调试

• https://blog.csdn.net/wodownload2/article/details/118081593
• https://www.jianshu.com/p/a6cad97ea54f
• https://www.cnblogs.com/wuzhang/p/wuzhang20190405.html
• https://blog.csdn.net/zhangjinlong1234/article/details/108569607