Uri u1=MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;//存储在sd卡上的音频文件 Uri u2=MediaStore.Audio.Media.INTERNAL_CONTENT_URI;//存储在手机内存存储器上的音频文件 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);