切换蓝牙的A2DP(高级音频分布配置文件)和AVRCP(音频/视频远程控制配置文件)的源(source)和汇点(sink)模式。
这里,SystemProperties.get尝试获取bluetooth.profile.a2dp.sink.enabled属性的值。如果该属性不存在,它将返回默认值"false"。然后,它检查这个值是否等于"true"。
- 如果当前是A2DP Sink模式(即isA2dpSink为true):
java复制代码
|---|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | if(isA2dpSink){                                                                                                                                                                                                                                                                                          |
|   | // 切换成A2DP Source和AVRCP Target模式                                                                                                                                                                                                                                                                         |
|   |  SystemProperties.set("bluetooth.profile.a2dp.sink.enabled","false");  SystemProperties.set("bluetooth.profile.avrcp.controller.enabled","false");  SystemProperties.set("bluetooth.profile.a2dp.source.enabled","true"); SystemProperties.set("bluetooth.profile.avrcp.target.enabled","true"); |
|   | }                                                                                                                                                                                                                                                                                                        |
代码试图切换到A2DP Source和AVRCP Target模式。
- 如果当前不是A2DP Sink模式(即isA2dpSink为false):
java复制代码
|---|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | else{                                                                                                                                                                                                                                                                                       |
|   | // 这里也写着"切换成主模式",但实际上是切换回A2DP Sink和AVRCP Controller模式                                                                                                                                                                                                                                       |
|   | SystemProperties.set("bluetooth.profile.a2dp.sink.enabled","true"); SystemProperties.set("bluetooth.profile.avrcp.controller.enabled","true"); SystemProperties.set("bluetooth.profile.a2dp.source.enabled","false"); SystemProperties.set("bluetooth.profile.avrcp.target.enabled","false"); |
|   | }                                                                                                                                                                                                                                                                                           |
但是,这里的注释还是写着"切换成主模式",但实际上它是将蓝牙设置切换回A2DP Sink和AVRCP Controller模式。
修改建议:
- 
修正注释以更准确地描述代码的功能。 
- 
考虑到代码可能在一个上下文中运行,其中A2DP Source和AVRCP Target被认为是"主模式",而A2DP Sink和AVRCP Controller被认为是"从模式"。如果是这样,那么注释应该是这样的: 
            
            
              java
              
              
            
          
                 boolean isA2dpSink = SystemProperties.get("bluetooth.profile.a2dp.sink.enabled","false").equals("true");
        if(isA2dpSink){//切换成主模式
            SystemProperties.set("bluetooth.profile.a2dp.sink.enabled","false");
            SystemProperties.set("bluetooth.profile.avrcp.controller.enabled","false");
            SystemProperties.set("bluetooth.profile.a2dp.source.enabled","true");
            SystemProperties.set("bluetooth.profile.avrcp.target.enabled","true");
        }else{//切换成主模式
            SystemProperties.set("bluetooth.profile.a2dp.sink.enabled","true");
            SystemProperties.set("bluetooth.profile.avrcp.controller.enabled","true");
            SystemProperties.set("bluetooth.profile.a2dp.source.enabled","false");
            SystemProperties.set("bluetooth.profile.avrcp.target.enabled","false");
        }