unity+android：大版本更新安装下好的apk，兼容任意安卓5.0,7.0,8.0版本

心已赠人 2022-05-09 11:46 119阅读 0赞

Android Studio  
1：在项目的res目录下创建xml目录，再创建file\_paths.xml文件。  
![在这里插入图片描述][70]

<?xml version="1.0" encoding="utf-8"?>
    <paths>
        <root-path name="root" path="" />
        <external-path name="external_storage_root" path="." />
        <external-path name="external_storage_download" path="Download" />
    </paths>

2.更改Androidmainfest文件

![在这里插入图片描述][70 1]  
红线部分替换为你应用的包名

3：java源码

package com.luoyikun.installapk;
    
    import android.app.Activity;
    import android.app.Fragment;
    import android.content.Context;
    import android.content.Intent;
    import android.net.Uri;
    import android.os.Build;
    import android.os.Bundle;
    import android.support.v4.content.FileProvider;
    
    import com.unity3d.player.UnityPlayer;
    
    import java.io.File;
    
    public class InstallApk extends Fragment {
        private static final String TAG = "InstallApk";
    
        String m_gameObjectName;
        String m_funcName;
    
        private Context unityContext;
        private Activity unityActivity;
    
    
        public void UnityFunc(String gameObjectName, String funcName)
        {
            m_gameObjectName = gameObjectName;
            m_funcName = funcName;
        }
    
        public static InstallApk GetInstanceByAndroid(Activity activity,Context context)
        {
            if (Instance == null)
            {
                Instance = new InstallApk();
                Instance.unityActivity = activity;
                Instance.unityContext = context;
    
                activity.getFragmentManager().beginTransaction().add(Instance, TAG).commit();
            }
            return Instance;
        }
    
        private static InstallApk Instance = null;
    
        public static InstallApk GetInstance()
        {
            if(Instance == null)
            {
                Instance = new InstallApk();
                Instance.unityActivity = UnityPlayer.currentActivity;
                Instance.unityContext = Instance.unityActivity.getBaseContext();
                UnityPlayer.currentActivity.getFragmentManager().beginTransaction().add(Instance, TAG).commit();
    
            }
            return Instance;
        }
    
        @Override
        public void onCreate(Bundle savedInstanceState)
        {
            super.onCreate(savedInstanceState);
            setRetainInstance(true);  // 这一句很重要，保存对该Fragment的引用，防止在旋转屏幕等操作时时丢失引用（Fragment隶属于Activity）
        }
    
        // 调用 Unity
        // gameObjectName 为接受消息的Unity 中 GameObject 的名字
        // functionName   为接受消息的GameObject 挂载 C# 脚本中的函数名
        // _content       为发送给Unity 的内容
        public void CallUnity( String _content)
        {
            UnityPlayer.UnitySendMessage(m_gameObjectName, m_funcName, _content);
        }
    
        public void installApp(String path){
            File pFile = new File(path);
            if (null == pFile)
                return;
            if (!pFile.exists())
                return;
            Intent _Intent = new Intent();
            _Intent.setAction(Intent.ACTION_VIEW);
            Uri _uri;
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                _Intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                _uri = FileProvider.getUriForFile(unityContext, unityContext.getPackageName() + ".fileProvider", pFile);
            }else {
                _uri = Uri.fromFile(pFile);
                _Intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            }
            _Intent.setDataAndType(_uri, "application/vnd.android.package-archive");
            unityContext.startActivity(_Intent);
        }
    
    }

unity：  
1.在unity需要导入android-support-v4.jar、android-support-v7-appcompat.jar包  
![在这里插入图片描述][70 2]  
2.调用

public static void InstallApk(string path)
        {
            AndroidJavaObject pluginObject = new AndroidJavaClass("com.luoyikun.installapk.InstallApk").CallStatic<AndroidJavaObject>("GetInstance");
            pluginObject.Call("installApp", path);
        }

需要注意的是如果使用unity的Application.persistentDataPath会在路径的最前面多个 : ,这个在安卓端是不认的，所以

string path = dataPath + apkName;
                path = path.Replace(":", "");
                AndroidFunc.InstallApk(path);

[70]: /images/20220509/721c15b2b2964ca38008000466feecb0.png
[70 1]: /images/20220509/c8dfdd0446af43598c870da6079c6c60.png
[70 2]: /images/20220509/d5513c68e51a4140b0d336b541c96fae.png