问题描述
我使用Android AudioManager设置SCO ON和扬声器ON后，然后我回到它回到它开始，媒体流会再留在听筒，而不是手机的扬声器。这里是我做的，通过扬声器SCO流（所有的伟大工程）更改路线
After I use the Android AudioManager to set SCO ON and speakerphone ON, then I return it back to where it started, the media stream will then stay on earpiece instead of the phones speaker. Here is where I make the changes to route a stream through the SCO speakerphone (which all works great)
if (am2.isBluetoothScoAvailableOffCall()) {
am2.startBluetoothSco();
}
if(!am2.isSpeakerphoneOn()){
speakerPhoneWasOn = false;
am2.setSpeakerphoneOn(true);
}
myHash.put(TextToSpeech.Engine.KEY_PARAM_STREAM,
String.valueOf(AudioManager.STREAM_VOICE_CALL));
am2.requestAudioFocus(null, AudioManager.STREAM_VOICE_CALL,
AudioManager.AUDIOFOCUS_GAIN_TRANSIENT);
然后我试图改变这一切回来读我的消息后（我使用TTS）
Then I try to change it all back after my message is read (I am using TTS)
if(SMSstream == 1){
if (am2.isBluetoothScoAvailableOffCall()) {
am2.stopBluetoothSco();
}
if(!speakerPhoneWasOn){
am2.setSpeakerphoneOn(false);
}
}
else{
}
am2.setMode(OLD_AUDIO_MODE);
am2.abandonAudioFocus(null);
但它保持与手机听筒，而不是直到我重新启动扬声器。我看了几个帖子说了相反的问题，但这个问题没有。我有一个Droid 3的与Android 2.3.4。
But it stays with the phone earpiece instead of the speaker until I reboot. I saw a few post that had the opposite problem but none with this issue. I have a Droid 3 with Android 2.3.4.
您可以在这里看到整个项目和源$ C $ C：
You can see the whole project and source code here: http://code.google.com/p/a2dpvolume/
推荐答案
OK，我终于解决了这个问题。它不是pretty。有一个在AudioManager我相信有些类型的错误。即使放弃焦点后会离开该装置中的流得一塌糊涂。除非最后TTS刚刚放弃的焦点之前阅读过的音乐流，它会流路线错误，静音流，等等。所以，我只是把它读一个单一的时期，如果短信已经阅读过任何流，除了之前的音乐流放弃焦点。我还清理了我叫事物的秩序，并读取TTS后固定的一些手机模式等。奇怪的是它似乎运作良好。
OK, I finally fixed this problem. Its not pretty. There is some sort of bug in the AudioManager I believe. Even after abandoning focus it would leave the device streams in a mess. Unless the last TTS was read over the music stream just before abandoning focus, it would route streams wrong, mute streams, etc. So, I just have it read a single period if a SMS had been read over any stream except the music stream before abandoning focus. I also cleaned up the order I called things in, and fixed some of the phone mode, etc after reading a TTS. Strangely it seems to work well.
这篇关于音频流使用AudioManager后停留在听筒的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！