MT6589平台通話錄音時如何播放提示音給對方？

1.修改AudioMTKStreamOut.cpp ssize_t AudioMTKStreamOut::write(const void *buffer, size_t bytes){   case android_audio_legacy::AudioSystem::MODE_IN_CALL:   case android_audio_legacy::AudioSystem::MODE_IN_CALL_2:   修改pBGSPlayer->Open(pSpeechDriver, 0x0, 0xFF); 為pBGSPlayer->Open(pSpeechDriver, 0xFF, 0xFF); 2.修改InCallScreen.javaa.添加： import android.media.ToneGenerator;b. 新增成員：private ToneGenerator mToneGenerator;c. 修改函數 private void onRecordClick(MenuItem menuItem)在 startRecord(); 之前添加：mToneGenerator = new ToneGenerator(AudioManager.STREAM_MUSIC, 240);setVolumeControlStream(AudioManager.STREAM_MUSIC); mToneGenerator.startTone(24, 1000);d.修改函數 private void stopRecord() 添加：if (mToneGenerator != null) { mToneGenerator.release(); mToneGenerator = null; }