小部件然後添加圖庫，選擇隨機顯示所有圖片，然後圖庫裏沒有圖片，會報下面的錯誤．
12-31 19:03:19.429 10483 10686 E DatabaseUtils: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=10650, uid=10033 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
12-31 19:03:19.429 10483 10686 E DatabaseUtils: at android.content.ContentProvider.enforceReadPermissionInner(ContentProvider.java:637)
12-31 19:03:19.429 10483 10686 E DatabaseUtils: at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:505)
12-31 19:03:19.429 10483 10686 E DatabaseUtils: at android.content.ContentProvider$Transport.query(ContentProvider.java:216)
12-31 19:03:19.429 10483 10686 E DatabaseUtils: at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:102)
12-31 19:03:19.429 10483 10686 E DatabaseUtils: at android.os.Binder.execTransact(Binder.java:674)
12-31 19:03:19.437 3062 3107 I ActivityManager: Showing crash dialog for package org.codeaurora.gallery u0
解決辦法：https://cloud.tencent.com/developer/ask/197498