java - android.database.sqlite.SQLiteException : no such column: bucket_display_name

Question

我试图使用 MediaStore 获取包含音频文件的存储桶。这在 Android 10 API 29 上运行良好，但不适用于以前的 Android 版本。我附上了 Android 10 API 29 上的工作示例的屏幕截图。

Caused by: android.database.sqlite.SQLiteException: no such column: bucket_display_name (code 1 SQLITE_ERROR): , while compiling: SELECT bucket_display_name, bucket_id FROM audio ORDER BY date_added ASC

日志猫。

Caused by: android.database.sqlite.SQLiteException: no such column: bucket_display_name (code 1 SQLITE_ERROR): , while compiling: SELECT bucket_display_name, bucket_id FROM audio ORDER BY date_added ASC
        at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:179)
        at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
        at android.content.ContentProviderProxy.query(ContentProviderNative.java:418)
        at android.content.ContentResolver.query(ContentResolver.java:802)
        at android.content.ContentResolver.query(ContentResolver.java:752)
        at android.content.ContentResolver.query(ContentResolver.java:710)
        at com.aisar.mediaplayer.fragments.AudioFolderFragment$AsyncVideoFolderLoader.doInBackground(AudioFolderFragment.java:148)
        at com.aisar.mediaplayer.fragments.AudioFolderFragment$AsyncVideoFolderLoader.doInBackground(AudioFolderFragment.java:130)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641) 
        at java.lang.Thread.run(Thread.java:764) 

代码:

class AsyncVideoFolderLoader extends AsyncTask<String, String, List<ModelAudioFolder>> {

    private String sortBy;

    public AsyncVideoFolderLoader(String sortBy) {
        this.sortBy = sortBy;
    }

    @Override
    protected List<ModelAudioFolder> doInBackground(String... strings) {
        List<ModelAudioFolder> videoItems = new ArrayList<>();
        videoItems.clear();

        final HashMap<String, ModelAudioFolder> output = new HashMap<>();
        final Uri contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

        final String[] projection = {MediaStore.Audio.Media.BUCKET_DISPLAY_NAME, MediaStore.Audio.Media.BUCKET_ID};

        try (final Cursor cursor = getActivity().getContentResolver().query(
                contentUri,
                projection,
                null,
                null,
                "" + sortBy)) {
            if ((cursor != null) && (cursor.moveToFirst())) {
                final int columnBucketName = cursor.getColumnIndex(MediaStore.Audio.Media.BUCKET_DISPLAY_NAME);
                final int columnBucketId = cursor.getColumnIndex(MediaStore.Audio.Media.BUCKET_ID);


                do {
                    final String bucketName = cursor.getString(columnBucketName);
                    final String bucketId = cursor.getString(columnBucketId);

                    if (!output.containsKey(bucketId)) {
                        final int count = getCount(contentUri, bucketId);

                        final ModelAudioFolder item = new ModelAudioFolder(
                                "" + bucketId,
                                "" + bucketName,
                                "",
                                "" + getPath(bucketId),
                                "" + count
                        );

                        output.put(bucketId, item);
                        videoItems.add(item);

                    }

                } while (cursor.moveToNext());
            }
        }
        return videoItems;
    }

    private int getCount(@NonNull final Uri contentUri, @NonNull final String bucketId) {
        try (final Cursor cursor = getActivity().getContentResolver().query(contentUri,
                null, MediaStore.Audio.Media.BUCKET_ID + "=?", new String[]{bucketId}, null)) {
            return ((cursor == null) || (cursor.moveToFirst() == false)) ? 0 : cursor.getCount();
        }
    }

    private String getPath(String BUCKET_ID) {
        String path = "";
        String selection = null;
        String[] projection = {
                MediaStore.Audio.Media.DATA,
                MediaStore.Audio.Media.BUCKET_ID
        };
        Cursor cursor = getActivity().getContentResolver().query(
                MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
                projection,
                selection,
                null,
                null);
        while (cursor.moveToNext()) {
            if (BUCKET_ID.equals(cursor.getString(1))) {
                //add only those videos that are in selected/chosen folder
                path = cursor.getString(0);
            }
        }
        return path;
    }

    @Override
    protected void onPostExecute(List<ModelAudioFolder> audioFolderList) {
        super.onPostExecute(audioFolderList);

        if (audioFolderList.size() <= 0) {
            noFoldersRl.setVisibility(View.VISIBLE);
            foldersRl.setVisibility(View.GONE);
        } else {
            noFoldersRl.setVisibility(View.GONE);
            foldersRl.setVisibility(View.VISIBLE);
        }

        Log.d("FoldersSize", "onPostExecute: " + audioFolderList.size());

        adapterAudioFolder = new AdapterAudioFolder(getActivity(), audioFolderList, dashboardActivity);
        foldersRv.setAdapter(adapterAudioFolder);
    }
}

...

Answer 1

异常原因是BUCKET_DISPLAY_NAME。它已添加到 API 29 中。在此之前，我们对 API 28 及以下版本使用 DISPLAY_NAME。请参阅文档 BUCKET_DISPLAY_NAME .

对于解决方案，您可以根据当前的 API 级别编写条件。为了获取文件夹名称，您可以使用RELATIVE_PATH。