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.java a.添加： import android.media.ToneGenerator; b. 添加成员：private ToneGenerator mToneGenerator; c. 修改函数 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.修改函数 private void stopRecord() 添加： if (mToneGenerator != null) { mToneGenerator.release(); mToneGenerator = null; }