c# - 如何在 Unity 中将 Uri.fromfile 转换为 FileProvider.getUriForFile？

Question

我有来自 this 的代码统一回答代码以安装 apk，但它在 Android 7.0 中不起作用，因为不再支持 Uri.fromfile 并且现在应该使用 FileProvider.getUriForFile。

我尝试在 android studio 中打开项目并按照本教程操作 list 文件 - https://inthecheesefactory.com/blog/how-to-share-access-to-file-with-fileprovider-on-android-nougat/en

        AndroidJavaClass intentObj = new 
        AndroidJavaClass("android.content.Intent");
        string ACTION_VIEW = intentObj.GetStatic<string>("ACTION_VIEW");
        int FLAG_ACTIVITY_NEW_TASK = intentObj.GetStatic<int>
        ("FLAG_ACTIVITY_NEW_TASK");
        AndroidJavaObject intent = new 
        AndroidJavaObject("android.content.Intent", ACTION_VIEW);

        AndroidJavaObject fileObj = new AndroidJavaObject("java.io.File", 
        apkPath);
        AndroidJavaClass uriObj = new AndroidJavaClass("android.net.Uri");
        AndroidJavaObject uri = uriObj.CallStatic<AndroidJavaObject>
        ("fromFile", fileObj);

        intent.Call<AndroidJavaObject>("setDataAndType", uri, 
        "application/vnd.android.package-archive");
        intent.Call<AndroidJavaObject>("addFlags", FLAG_ACTIVITY_NEW_TASK);
        intent.Call<AndroidJavaObject>("setClassName", 
        "com.android.packageinstaller", 
        "com.android.packageinstaller.PackageInstallerActivity");

        AndroidJavaClass unityPlayer = new 
        AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject currentActivity = 
        unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        currentActivity.Call("startActivity", intent);

Answer 1

只是替换

AndroidJavaObject fileObj = new AndroidJavaObject("java.io.File", apkPath);
AndroidJavaClass uriObj = new AndroidJavaClass("android.net.Uri");
AndroidJavaObject uri = uriObj.CallStatic<AndroidJavaObject>("fromFile", fileObj);

与

AndroidJavaObject fileObj = new AndroidJavaObject("java.io.File", apkPath);
AndroidJavaClass fileProvider = new AndroidJavaClass("android.support.v4.content.FileProvider");
AndroidJavaObject uri = fileProvider.CallStatic<AndroidJavaObject>("getUriForFile", unityContext, authority, fileObj);

authority 参数构造为:

string packageName = unityContext.Call<string>("getPackageName");
string authority = packageName + ".fileprovider";

然后在调用 currentActivity.Call 函数之前向 Intent 添加 FLAG_GRANT_READ_URI_PERMISSION 权限。

intent.Call<AndroidJavaObject>("addFlags", FLAG_GRANT_READ_URI_PERMISSION);

有关完整脚本，请参阅现在编辑的 How to install Android apk from unity application问题。