MediaPlayer player = new MediaPlayer();

 fd = FileUtils.getAssetFileDescription(path);
 player.setDataSource(fd.getFileDescriptor(), fd.getStartOffset(),
              fd.getLength());

player.prepareAsync();
player.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
              mp.start();
            }
          });

 player.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
              mp.reset();
              counter[0]++;
              if (counter[0] < list.size()) {
                try {
                  AssetFileDescriptor fileDescriptor = FileUtils.getAssetFileDescription(String.format("sound/tts_%s.mp3", list.get(counter[0])));
                  mp.setDataSource(fileDescriptor.getFileDescriptor(), fileDescriptor.getStartOffset(), fileDescriptor.getLength());
                  mp.prepare();
                } catch (IOException e) {
                  e.printStackTrace();
                  latch.countDown();
                }
              } else {
                mp.release();
                latch.countDown();
              }
            }
          });

final List<String> list = new VoiceTemplate()
        .prefix("success")
        .numString("12.13")
        .suffix("yuan")
        .gen();

VoiceSpeaker.getInstance().speak(list);