源码地址 PhoneWindowManager.java (frameworks\base\policy\src\com\android\internal\policy\impl)  源码如下： 源码地址 PhoneWindowManager.java (frameworks\base\policy\src\com\android\internal\policy\impl)  源码如下： * @return Whether fm is being played right now. boolean isFmActive final AudioManager AudioManager mContext getSystemService Context AUDIO_SERVICE "isFmActive: couldn't get AudioManager reference" return false return isFmActive 源码地址 PhoneWindowManager.java (frameworks\base\policy\src\com\android\internal\policy\impl)  源码如下：