1

我在以下链接中问了一个问题，如何知道音频何时开始在 android 中播放， 我得到了一个完美的答案。我附上了它的代码。现在我的问题是当音乐开始播放时我会失去音频焦点。我的onfocuschange听众没有对音频管理器的更改做出响应。我的代码有什么问题吗？所以我可以在音频管理器中收听所有更改（开始、暂停、停止）。感谢帮助。

我在我的服务类中实现了它。

am = (AudioManager) getApplicationContext().getSystemService(Context.AUDIO_SERVICE);

    am.getMode();

      afChangeListener = new OnAudioFocusChangeListener() {


            public void onAudioFocusChange(int focusChange) {
                Log.d("new","focus: " +focusChange+"mode "+am.getMode() +"ismusic "+am.isMusicActive());


                if (focusChange == AudioManager.AUDIOFOCUS_GAIN_TRANSIENT){
                    Log.d("new","focus:started trans " );

                }else if (focusChange == AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK){
                    Log.d("new","focus:started duck " );

                }

            else if (focusChange == AudioManager.AUDIOFOCUS_LOSS_TRANSIENT){
                   Log.d("new","focus:paused  " );
            } else if (focusChange == AudioManager.AUDIOFOCUS_GAIN) {
                Log.d("new","focus:started " );
                } else if (focusChange == AudioManager.AUDIOFOCUS_LOSS) {
                    Log.d("new","focus:stoped  " );
                   // am.unregisterMediaButtonEventReceiver(RemoteControlReceiver);
                   // am.abandonAudioFocus(afChangeListener);
                    // Stop playback
                }
            }
        };
4

0 回答 0