系統Content Provider圖片影音

  Uri u1=MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;//存儲在sd卡上的音頻文件

  Uri u2=MediaStore.Audio.Media.INTERNAL_CONTENT_URI;//存儲在手機內存存儲器上的音頻文件

  Uri u3=MediaStore.Images.Media.EXTERNAL_CONTENT_URI;

  Uri u4=MediaStore.Images.Media.INTERNAL_CONTENT_URI;

  Uri u5=MediaStore.Video.Media.EXTERNAL_CONTENT_URI;

  Uri u6=MediaStore.Video.Media.INTERNAL_CONTENT_URI;

  Cursor cr=resolver.query(u1, projection, selection,  
                         selectionArgs, sortOrder);