Question

我不确定这是否是提出这个问题的正确位置，但我无法在任何地方寻求帮助。我试图获得this application to work，但我遇到了一些错误。

点击＆＃34;打开图库＆＃34;按钮立即崩溃整个应用程序与此错误：

    FATAL EXCEPTION: main
Process: com.niel.galleryphotoapp, PID: 3691
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.niel.galleryphotoapp/com.niel.galleryphotoapp.HomeFragmentActivity}: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=3691, uid=10086 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
 at android.app.ActivityThread.-wrap12(ActivityThread.java)
 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
 at android.os.Handler.dispatchMessage(Handler.java:102)
 at android.os.Looper.loop(Looper.java:154)
 at android.app.ActivityThread.main(ActivityThread.java:6119)
 at java.lang.reflect.Method.invoke(Native Method)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
    Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=3691, uid=10086 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
at android.os.Parcel.readException(Parcel.java:1684)
 at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
at android.content.ContentResolver.query(ContentResolver.java:532)
at android.content.ContentResolver.query(ContentResolver.java:474)
at com.niel.galleryphotoapp.DeviceImageManager.getPhoneAlbums(DeviceImageManager.java:34)
at com.niel.galleryphotoapp.HomeFragmentActivity.onCreate(HomeFragmentActivity.java:80)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6119) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)

我不知道为什么会发生这种情况，我检查了清单，似乎所需的权限就在那里。

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

我使用的是Android Studio 2.3.3 + Nexus 4 API 25模拟器。

Answer 1

虽然您已在清单中包含权限，但您还需要请求运行时权限。你需要知道的一切都在这里：

https://developer.android.com/training/permissions/requesting.html

Answer 2

正如cjnash所说，你也需要要求运行时权限。如果您只是想快速尝试一下，您可以进入您的设备设置并手动为您的应用程序提供运行所需的权限。

Android Studio权限拒绝

2 个答案: