如何使用Android的PJSUA2管理音频输出级别 [英] How do I manage the audio output levels with PJSUA2 for Android

问题描述

我有一个Android项目，该项目使用PJSUA2进行VoIP通信，其他一切都很好.但是，我受困于一个问题，即我无法让音量"控件在显示我的活动呼叫的活动"中工作.我尝试过推荐的方法-

I have an Android project that uses PJSUA2 for VoIP communication and everything else works just fine. I am stymied however, with a problem where I cannot get the Volume controls to work in the Activity where my active call is shown. I have tried doing it the recommended way -

audioManager = (AudioManager) getSystemService(AUDIO_SERVICE);
setVolumeControlStream(AudioManager.STREAM_MUSIC);

这什么也没做.我需要知道是否可以使用OnKey Listeners来手动增加和减小音量，或者是否完全缺少某些东西，这将使我以首选方式进行操作.

This doesn't do anything. I need to know if using OnKey Listeners is a feasible alternative to manually increase and decrease the volume or if I am missing something completely which will let me do it the preferred way.

推荐答案

当呼叫处于连接状态时，您必须将音频模式设置为MODE_IN_COMMUNICATION，并在断开连接时将其设置为MODE_NORMAL.

When call is in connected state you have to set audio mode to MODE_IN_COMMUNICATION and set to MODE_NORMAL on disconnect.

// set mode to 3 to indicate MODE_IN_COMMUNICATION mode
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).setMode(3);
// set audio mode to normal again on call disconnection
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).setMode(AudioManager.MODE_NORMAL);

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