Не удалось получить миниатюры

Question

Я пытаюсь получить растровые изображения с миниатюрами, используя следующий код, но он не удался и бросил ошибку ниже. Как я могу устранить эту ошибку?

Код

bitmap = MediaStore.Images.Thumbnails.getThumbnail(context.getContentResolver(), id, 
        MediaStore.Images.Thumbnails.MICRO_KIND, null); 

// I get id like 
String[] projection = new String[]{MediaStore.Images.Media._ID, 
       MediaStore.Images.Media.DATA, 
       MediaStore.Images.Media.TITLE, 
       MediaStore.Images.Media.BUCKET_ID, 
       MediaStore.Images.Media.BUCKET_DISPLAY_NAME, 
       MediaStore.Images.Media.SIZE, 
       MediaStore.Images.Media.MIME_TYPE, 
       MediaStore.Images.Media.DATE_TAKEN}; 
Cursor cursor = context.getContentResolver().query(
       MediaStore.Images.Media.EXTERNAL_CONTENT_URI, projection, null,null, MediaStore.Images.Media.DATE_TAKEN + " desc"); 

id = cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media._ID)); 

Ошибка

E/MiniThumbFile(6355): miniThumbDataFile: IOException(rw) for: /storage/emulated/0/.thumbnails/.thumbdata-6.0_18, try read only mode 
E/MiniThumbFile(6355): java.io.FileNotFoundException: /storage/emulated/0/.thumbnails/.thumbdata-6.0_18: open failed: EACCES (Permission denied) 
E/MiniThumbFile(6355):  at libcore.io.IoBridge.open(IoBridge.java:453) 
E/MiniThumbFile(6355):  at java.io.RandomAccessFile.<init>(RandomAccessFile.java:118) 
E/MiniThumbFile(6355):  at android.media.MiniThumbFile.miniThumbDataFile(MiniThumbFile.java:174) 
E/MiniThumbFile(6355):  at android.media.MiniThumbFile.getMagic(MiniThumbFile.java:211) 
E/MiniThumbFile(6355):  at android.provider.MediaStore$InternalThumbnails.getThumbnail(MediaStore.java:653) 
E/MiniThumbFile(6355):  at android.provider.MediaStore$Images$Thumbnails.getThumbnail(MediaStore.java:1152) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.LocalImageBitmapUtil.getThumbnail(LocalImageBitmapUtil.java:140) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.BitmapCacheHelper$BitmapWorkerTask.doInBackground(BitmapCacheHelper.java:118) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.BitmapCacheHelper$BitmapWorkerTask.doInBackground(BitmapCacheHelper.java:78) 
E/MiniThumbFile(6355):  at android.os.AsyncTask$2.call(AsyncTask.java:288) 
E/MiniThumbFile(6355):  at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
E/MiniThumbFile(6355):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
E/MiniThumbFile(6355):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
E/MiniThumbFile(6355):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
E/MiniThumbFile(6355):  at java.lang.Thread.run(Thread.java:848) 
E/MiniThumbFile(6355): Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied) 
E/MiniThumbFile(6355):  at libcore.io.Posix.open(Native Method) 
E/MiniThumbFile(6355):  at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) 
E/MiniThumbFile(6355):  at libcore.io.IoBridge.open(IoBridge.java:437) 
E/MiniThumbFile(6355):  ... 14 more 
E/MiniThumbFile(6355): Got exception when reading thumbnail, id = 307318, disk full or mount read-only? class java.nio.channels.NonWritableChannelException 
E/MiniThumbFile(6355): miniThumbDataFile: IOException(rw) for: /storage/emulated/0/.thumbnails/.thumbdata-6.0_18, try read only mode 
E/MiniThumbFile(6355): java.io.FileNotFoundException: /storage/emulated/0/.thumbnails/.thumbdata-6.0_18: open failed: EACCES (Permission denied) 
E/MiniThumbFile(6355):  at libcore.io.IoBridge.open(IoBridge.java:453) 
E/MiniThumbFile(6355):  at java.io.RandomAccessFile.<init>(RandomAccessFile.java:118) 
E/MiniThumbFile(6355):  at android.media.MiniThumbFile.miniThumbDataFile(MiniThumbFile.java:174) 
E/MiniThumbFile(6355):  at android.media.MiniThumbFile.getMagic(MiniThumbFile.java:211) 
E/MiniThumbFile(6355):  at android.provider.MediaStore$InternalThumbnails.getThumbnail(MediaStore.java:653) 
E/MiniThumbFile(6355):  at android.provider.MediaStore$Images$Thumbnails.getThumbnail(MediaStore.java:1152) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.LocalImageBitmapUtil.getThumbnail(LocalImageBitmapUtil.java:140) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.BitmapCacheHelper$BitmapWorkerTask.doInBackground(BitmapCacheHelper.java:118) 
E/MiniThumbFile(6355):  at com.dvlee.androidtest.util.BitmapCacheHelper$BitmapWorkerTask.doInBackground(BitmapCacheHelper.java:78) 
E/MiniThumbFile(6355):  at android.os.AsyncTask$2.call(AsyncTask.java:288) 
E/MiniThumbFile(6355):  at java.util.concurrent.FutureTask.run(FutureTask.java:237) 
E/MiniThumbFile(6355):  at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231) 
E/MiniThumbFile(6355):  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
E/MiniThumbFile(6355):  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
E/MiniThumbFile(6355):  at java.lang.Thread.run(Thread.java:848) 
E/MiniThumbFile(6355): Caused by: libcore.io.ErrnoException: open failed: EACCES (Permission denied) 
E/MiniThumbFile(6355):  at libcore.io.Posix.open(Native Method) 
E/MiniThumbFile(6355):  at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) 
E/MiniThumbFile(6355):  at libcore.io.IoBridge.open(IoBridge.java:437) 
E/MiniThumbFile(6355):  ... 14 more 
E/MiniThumbFile(6355): Got exception when reading thumbnail, id = 307316, disk full or mount read-only? class java.nio.channels.NonWritableChannelException 

Answer 1

Вы можете использовать ThumbnailUtils.

final int THUMBSIZE = 64; 

Bitmap ThumbImage = ThumbnailUtils.extractThumbnail(BitmapFactory.decodeFile(imagePath), 
        THUMBSIZE, THUMBSIZE);