Question

我正在尝试获取一系列歌曲以填充回收者视图。我对所有其他标签进行了排序，但是对于所有歌曲，它都拒绝工作。我正在使用MediaStore.Audio.Media.TITLE。

这是我的堆栈跟踪：

java.lang.RuntimeException: An error occurred while executing doInBackground()
at android.os.AsyncTask$3.done(AsyncTask.java:309)
at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
at java.util.concurrent.FutureTask.run(FutureTask.java:242)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
at java.lang.Thread.run(Thread.java:818)
Caused by: android.database.sqlite.SQLiteException: no such column: title (code 1): , while compiling: SELECT _id, title, artist, album FROM album_info ORDER BY title ASC
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:179)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
at android.content.ContentResolver.query(ContentResolver.java:493)
at android.content.ContentResolver.query(ContentResolver.java:435)
at xyz.timmo.music.SongsFragment$GetAlbums.doInBackground(SongsFragment.java:88)
at xyz.timmo.music.SongsFragment$GetAlbums.doInBackground(SongsFragment.java:71)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
at java.lang.Thread.run(Thread.java:818)

我的光标方法如下：

Cursor cursor = context.getContentResolver().query(
    MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI,
    new String[]{
            //MediaStore.Audio.Media._ID,
            MediaStore.Audio.Albums._ID,
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Artists.ARTIST,
            MediaStore.Audio.Albums.ALBUM
            //MediaStore.Audio.Media.DURATION
    },
    null,
    null,
    MediaStore.Audio.Media.TITLE + " ASC"
);
if (cursor != null) {
    //count = cursor.getCount();
    cursor.moveToFirst();
    do {
        artArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Albums._ID)));
        songsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Media.TITLE)));
        artistsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Artists.ARTIST)));
        albumsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM)));
     } while (cursor.moveToNext());
     cursor.close();
}

那么获取正确的字符串是什么？所有其他主题建议使用MediaStore.Audio.Media.TITLE，但这似乎缺失。这是在最新的sdk中删除的东西吗？

Answer 1

我明白了。当我应该提取MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI

时，我在光标中提取MediaStore.Audio.Media.EXTERNAL_CONTENT_URI

以下是未来参考的工作代码：

Cursor cursor = context.getContentResolver().query(
        MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
        new String[]{
                MediaStore.Audio.Media._ID,
                //MediaStore.Audio.Albums._ID,
                MediaStore.Audio.Media.TITLE,
                MediaStore.Audio.Media.ARTIST,
                MediaStore.Audio.Media.ALBUM
                //MediaStore.Audio.Media.DURATION
        },
        null,
        null,
        MediaStore.Audio.Media.TITLE + " ASC"
);
if (cursor != null) {
    //count = cursor.getCount();
    cursor.moveToFirst();
    do {
        artArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Albums._ID)));
        songsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Media.TITLE)));
        artistsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Artists.ARTIST)));
        albumsArrayList.add(cursor.getString(
                cursor.getColumnIndex(MediaStore.Audio.Albums.ALBUM)));
    } while (cursor.moveToNext());
    cursor.close();

Android MediaStore - SQLiteException：No Such Column：Title

1 个答案: