从contentResolver删除文件仅从数据库中删除条目(不是文件)

jes*_*res 5 android mediastore android-contentresolver

我尝试使用contentResolver删除文件,但仅从数据库而不是实际文件中删除条目。因此,我尝试先删除条目,然后再删除文件:

int rows = context.getContentResolver().delete(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
MediaStore.Audio.Media._ID + "=" + idSong, null);

// Remove file from card
if (rows != 0) {
Uri uri = ContentUris.withAppendedId(
        MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, idSong);
File f = new File(uri.getPath());
if(!f.delete())
    Log.d("fail-2", "fail-2");  
}
else
Log.d("fail-1", "fail-1");
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...,输出为“ fail-2”。为什么?

为什么ContentResolver不删除真实文件?这正常吗?

jes*_*res 1

这是工作:

    // Remove entry from database
    int rows = context.getContentResolver().delete(
            MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
            MediaStore.Audio.Media._ID + "=" + idSong, null);

    // Remove file from card
    if (rows != 0) {
        try {
            File f = new File(path);
            if (f.delete())
                return true;
        } catch (Exception e) {
            Log.d("MusicDB", "file: '" + path
                    + "' couldn't be deleted", e);
            return false;
        }
    }
    return false;
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但为什么 contentResolver 不删除该文件?