重构发送初始数据 ，改在蓝牙连接状态之后发送初始数据和考试状态

endian11

2020-12-04 8ee5db35d4b70cd13ca31d3783f427208aa8c0a4

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<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@drawable/ic_btn_save_press"></item>
<item android:state_pressed="false" android:drawable="@drawable/ic_btn_save_nopress"></item>
</selector>