MediaMetadataRetriever.setDataSource(Native Method)导致RuntimeException:status = 0xFFFFFFEA

时间:2017-09-04 03:10:10

标签: java android react-native mediametadataretriever

我正在使用 ReactNative 构建媒体播放器。为了完成这样的应用程序,我必须导出我为检索音乐元数据(如专辑,艺术家等)以及文件路径而构建的模块。

上面的代码使用 jdk1.8.0_112 完美运行,但自从我更新为 jdk1.8.0_144 后它停止了工作。

在这个例子中,我没有检查not null,而不是empty,length> 0等,但我真的是在原来的那个。

try {
    MediaMetadataRetriever mmr = new MediaMetadataRetriever();
    mmr.setDataSource("Path to the file"); // /storage/337C-1C15/Music/Edguy/Speedhoven.mp3
} catch (RuntimeException ex) {
    // java.lang.RuntimeException: setDataSource failed: status = 0xFFFFFFEA
}

我面临两个问题。一方面,我不是一个伟大的Android开发者,所以获得一些线索是一项艰巨的任务。另一方面,错误确实提供了良好的描述。

为了防止你们中的一些人有更好的方法来完成我的尝试,我在这里留下了整个代码:

@ReactMethod
public void getAll(Callback errorCallback, Callback successCallback){

    ContentResolver musicResolver = this.getCurrentActivity().getContentResolver();
    Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
    Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);

    if (musicCursor != null && musicCursor.moveToFirst()) {

        WritableArray jsonArray = new WritableNativeArray();
        MediaMetadataRetriever mmr = new MediaMetadataRetriever();
        WritableMap items = new WritableNativeMap();

        int titleColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.TITLE);
        int idColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media._ID);
        int artistColumn = musicCursor.getColumnIndex(android.provider.MediaStore.Audio.Media.ARTIST);

        try {
            do {
                items = new WritableNativeMap();
                byte[] art;

                long thisId = musicCursor.getLong(idColumn);
                String thisPath = musicCursor.getString(musicCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA));
                String thisTitle = musicCursor.getString(titleColumn);
                String thisArtist = musicCursor.getString(artistColumn);
                String duration = musicCursor.getString(musicCursor.getColumnIndex(MediaStore.Audio.Media.DURATION));


                if(thisPath != null && thisPath != "" && thisPath.endsWith(".mp3")) {

                    mmr.setDataSource(thisPath);

                    String album = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);
                    String artist = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);
                    String title = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE);
                    String genre = mmr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_GENRE);
                    String encoded = "";
                    String encodedImage = "";
                    art = mmr.getEmbeddedPicture();

                    if (album == null) {
                        album = thisArtist;
                    }

                    if (artist == null) {
                        artist = thisArtist;
                    }

                    if (title == null) {
                        title = thisTitle;
                    }

                    if (art != null) {
                        Bitmap songImage = BitmapFactory.decodeByteArray(art, 0, art.length);
                        if(songImage != null){
                            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
                            songImage.compress(Bitmap.CompressFormat.JPEG, 60, byteArrayOutputStream);
                            byte[] byteArray = byteArrayOutputStream.toByteArray();
                            encodedImage = Base64.encodeToString(byteArray, Base64.DEFAULT);
                            String pathtoImg = "";
                            byte[] imageByte = Base64.decode(encodedImage, Base64.DEFAULT);
                            try {
                                pathtoImg = Environment.getExternalStorageDirectory() + "/" + thisId + ".jpg";
                                File filePath = new File(pathtoImg);
                                FileOutputStream fos = new FileOutputStream(filePath, true);
                                encoded = pathtoImg;
                                fos.write(imageByte);
                                fos.flush();
                                fos.close();
                            } catch (FileNotFoundException fnfe) {
                                errorCallback.invoke(fnfe.getMessage());
                            } catch (IOException ioe) {
                                errorCallback.invoke(ioe.getMessage());
                            }
                        }
                    }

                    String str = String.valueOf(thisId);
                    items.putString("id", str);
                    items.putString("album", album);
                    items.putString("artist", artist);
                    items.putString("title", title);
                    items.putString("genre", genre);

                    if (encoded == "") {
                        items.putString("cover", "");
                    } else {
                        items.putString("cover", "file://" + encoded);
                    }

                    items.putString("duration", duration);
                    items.putString("path", thisPath);
                    jsonArray.pushMap(items);
                }
            } while (musicCursor.moveToNext());

            successCallback.invoke(jsonArray);
            mmr.release();
        } catch (RuntimeException e) {
            errorCallback.invoke(e.toString());
            mmr.release();
        } catch (Exception e) {
            errorCallback.invoke(e.getMessage());
            mmr.release();
        }
    }
}

当然,我已经看过了:

1 个答案:

答案 0 :(得分:5)

经过调试和研究后,我发现了问题。

当文件出现问题时,mmr.setDataSource("path")似乎会返回RuntimeException这一点尤其重要,因为即使文件存在,也无法检索其元数据。

解决方案是将MediaMetadataRetriever用于try/catch,如下所示:

while(cursor.moveNext()){
  try {
    MediaMetadataRetriever mmr = new MediaMetadataRetriever();
    mmr.setDataSource("Path to the file"); // /storage/337C 1C15/Music/Edguy/Speedhoven.mp3
  } catch (RuntimeException ex) {
    // something went wrong with the file, ignore it and continue
  }
}