没有访问文件的权限

Question

我正在使用Unity游戏引擎创建游戏。在这个游戏中，我抓取了一个屏幕截图，并将其保存到Unity的默认文件夹（“Application.PersistentDataPath”）：

/data/data/de.mytest.mygame/files/screenshot.png

AndroidJavaObject fileObject = new AndroidJavaObject("java.io.File", imageFileName);
bool fileExist = fileObject.Call<bool>("exists");
Debug.Log("File exist : " + fileExist);

如何修复此权限问题？

编辑：创建意图如下所示：

 AndroidJavaClass intentClass = new AndroidJavaClass("android.content.Intent");
AndroidJavaObject intentObject = new AndroidJavaObject("android.content.Intent");

intentObject.Call<AndroidJavaObject>("setAction", intentClass.GetStatic<string>("ACTION_SEND"));
intentObject.Call<AndroidJavaObject>("setType", "image/*");
intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_SUBJECT"), subject);
intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TITLE"), title);
intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_TEXT"), message);

AndroidJavaClass uriClass = new AndroidJavaClass("android.net.Uri");
AndroidJavaObject fileObject = new AndroidJavaObject("java.io.File", imageFileName);
AndroidJavaObject uriObject = uriClass.CallStatic<AndroidJavaObject>("fromFile", fileObject);

intentObject.Call<AndroidJavaObject>("putExtra", intentClass.GetStatic<string>("EXTRA_STREAM"), uriObject);
AndroidJavaClass unity = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
AndroidJavaObject currentActivity = unity.GetStatic<AndroidJavaObject>("currentActivity");
currentActivity.Call ("startActivity", intentObject);

Answer 1

您可能缺少一个权限

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />