android暂停第三方音频播放

暂停第三方播放：

    (getSystemService(AUDIO_SERVICE) as AudioManager).requestAudioFocus(null, AudioManager.STREAM_RING, AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)

恢复播放：

    (getSystemService(AUDIO_SERVICE) as AudioManager).abandonAudioFocus(null)