Android开发之关闭和打开Speaker(扬声器)的方法

privatE int currVolume = 0;
/**
* 打开扬声器
*/
private void openSpeaker() {
    try{
      Au@L_296_3@manager au@L_296_3@manager = (Au@L_296_3@manager) getSystemservice(Context.AUdio_serviCE);
      au@L_296_3@manager.setMode(Au@L_296_3@manager.ROUTE_SPEAKER);
      currVolume = au@L_296_3@manager.getStreamVolume(Au@L_296_3@manager.STREAM_VOICE_CALL);
      if(!au@L_296_3@manager.isSpeakerphoneOn()) {
        //setSpeakerphoneOn() only work when audio mode set to MODE_IN_CALl.
        au@L_296_3@manager.setMode(Au@L_296_3@manager.MODE_IN_CALL);
        au@L_296_3@manager.setSpeakerphoneOn(true);
        au@L_296_3@manager.setStreamVolume(Au@L_296_3@manager.STREAM_VOICE_CALL,au@L_296_3@manager.getStreAMMaxVolume(Au@L_296_3@manager.STREAM_VOICE_CALL ),Au@L_296_3@manager.STREAM_VOICE_CALL);
      }
    } catch (Exception E) {
      e.printStackTrace();
    }
}
/**
* 关闭扬声器
*/
public void closeSpeaker() {
    try {
      Au@L_296_3@manager au@L_296_3@manager = (Au@L_296_3@manager) getSystemservice(Context.AUdio_serviCE);
      if(au@L_296_3@manager != null) {
        if(au@L_296_3@manager.isSpeakerphoneOn()) {
          au@L_296_3@manager.setSpeakerphoneOn(false);
          au@L_296_3@manager.setStreamVolume(Au@L_296_3@manager.STREAM_VOICE_CALL,currVolume,Au@L_296_3@manager.STREAM_VOICE_CALL);
        }
      }
    } catch (Exception E) {
      e.printStackTrace();
    }
}