如何在 android 中播放 Base64 编码的音频？

Question

到目前为止我所尝试的：-

• 有一个音频文件的 Base64 编码字符串。

现在我在这里尝试这样玩。

public void PlayAudio(String base64EncodedString){
        try
        {
            String url = "data:audio/mp3;base64,"+base64EncodedString;
            Uri uri = Uri.parse(url);
            mediaPlayer.setDataSource(MainActivity.this, uri);
            /*mediaPlayer.prepare();*/
            mediaPlayer.start();
        }
        catch(Exception ex){
            System.out.print(ex.getMessage());
        }
    }

和

private void playMp3(byte[] mp3SoundByteArray) {
        try {
            // create temp file that will hold byte array
            File tempMp3 = File.createTempFile("kurchina", "mp3", getCacheDir());
            tempMp3.deleteOnExit();
            FileOutputStream fos = new FileOutputStream(tempMp3);
            fos.write(mp3SoundByteArray);
            fos.close();

            // resetting mediaplayer instance to evade problems
            mediaPlayer.reset();

            // In case you run into issues with threading consider new instance like:
            // MediaPlayer mediaPlayer = new MediaPlayer();

            // Tried passing path directly, but kept getting
            // "Prepare failed.: status=0x1"
            // so using file descriptor instead
            FileInputStream fis = new FileInputStream(tempMp3);
            mediaPlayer.setDataSource(fis.getFD());

            //mediaPlayer.prepare();
            mediaPlayer.start();
        } catch (IOException ex) {
            String s = ex.toString();
            ex.printStackTrace();
        }
    }

但没有播放音频。

请任何人帮助我解决这个问题。

Answer 1

您实际上需要在播放之前对 Base64 编码的字符串进行解码。请查看解码过程here