大神看看我的错误; 我一个刚学Android的不会看? 拜托了

08-02 19:20:26.702 25806-25936/com.example.lenovo.push E/AndroidRuntime: FATAL EXCEPTION: ModernAsyncTask #1
Process: com.example.lenovo.push, PID: 25806
java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:161)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:762)
Caused by: java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaProvider uri content://media/external/images/media from pid=25806, uid=10358 requires android.permission.READ_EXTERNAL_STORAGE, or grantUriPermission()
at android.os.Parcel.readException(Parcel.java:1693)
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:536)
at android.support.v4.content.ContentResolverCompatJellybean.query(ContentResolverCompatJellybean.java:33)
at android.support.v4.content.ContentResolverCompat$ContentResolverCompatImplJB.query(ContentResolverCompat.java:57)
at android.support.v4.content.ContentResolverCompat.query(ContentResolverCompat.java:125)
at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:59)
at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:37)
at android.support.v4.content.AsyncTaskLoader.onLoadInBackground(AsyncTaskLoader.java:302)
at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:57)
at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:45)
at android.support.v4.content.ModernAsyncTask$2.call(ModernAsyncTask.java:138)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607) 
at java.lang.Thread.run(Thread.java:762) 

http://tieba.baidu.com/p/2673210206

https://github.com/yanzhenjie/AndPermission 可能是动态权限没有