我如何從MediaStore獲取專輯封面？

Question

如何從MediaStore獲取專輯封面？我嘗試這樣的：

String[] projectionImages = new String[]{MediaStore.Audio.Albums.ALBUM_ART, MediaStore.Audio.Albums.ALBUM_KEY}; 


Cursor c = contentResolver.query(MediaStore.Audio.Albums.INTERNAL_CONTENT_URI, projectionImages, null, null, null); 

if(c != null){ 
     c.moveToFirst(); 
     Log.e(TAG, "am gasit " + c.getString(0) + " " + c.getString(1)); 
    } 
else{ 
     Log.e(TAG, "No image"); 
} 

但沒有工作..我只檢索每個條目爲空！

謝謝！

Answer 1

它迭代了在目錄中看到的條目數量還是數字不匹配？

的，在格蘭MediaStore

if (cursor.moveToFirst()) { 
do { 
    int col = cursor.getColumnIndex(Images.Media.DESCRIPTION); 
    String description = cursor.getString(col); 
    if (new Long(item).toString().equals(description)) { 
     imageId = cursor.getPosition(); 
     int dataColumn = cursor.getColumnIndex(Images.Media.DATA); 
     filePath = cursor.getString(dataColumn); 
     return true; 
    } 
} while (cursor.moveToNext()); 

Answer 2

搜索圖像時，試試這一個

Cursor cursorAlbum = managedQuery(MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI, 
        new String[]{MediaStore.Audio.Albums._ID, MediaStore.Audio.Albums.ALBUM_ART},MediaStore.Audio.Albums._ID+ "=" + album_id, null, null); 

    if(cursorAlbum != null && cursorAlbum.moveToFirst()) 
     { 

     String uri = cursorAlbum.getString(cursorAlbum.getColumnIndex("album_art")); 
     cursorAlbum.close(); 
     if(uri != null) image.setImageURI(Uri.parse(uri)); 

     }