getFileDescriptor同时读取MP3文件从扩展文件返回null [英] getFileDescriptor returns null while reading mp3 files from the expansion files

问题描述

我已经下载并存储在扩展文件successfully.But崩溃，当我尝试里面播放MP3 ..

I have downloaded and stored the expansion files successfully.But it crashes when i try to play the mp3 inside..

            ZipResourceFile expansionFile = APKExpansionSupport.getAPKExpansionZipFile(getApplicationContext(),
                    1, 0);

            InputStream fileStream = expansionFile.getInputStream("mysong.mp3");
            AssetFileDescriptor asd = expansionFile.getAssetFileDescriptor("mysong.mp3");
            MediaPlayer mediaPlayer = new MediaPlayer();
                    mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
                    mediaPlayer.setDataSource(asd.getFileDescriptor(), asd.getStartOffset(), asd.getLength());
                    asd.close();
                    mediaPlayer.prepare();
                    mediaPlayer.start();

在这里说的logcat同时InputStream和文件描述符是null..Can谁能帮助我？

Here the logcat says both the inputstream and the file descriptor are null..Can anyone help me ?

推荐答案

Finaly它解决。该文件的名称应与完整路径。

Finaly it solved.. The file name should be with the full path..

AssetFileDescriptor asd = expansionFile.getAssetFileDescriptor("main.1.com.mypackage.app/mysong.mp3");

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