重构代码；修改mapId为-1的exam_status表，表示考试状态

endian11

2020-08-13 a927c72c0f06ef5bd771e5ae00bc35155c271762

 app/src/main/res/layout/layout_check_signal.xml

@@ -4,6 +4,7 @@
        xmlns:lee="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/ic_bground"
        android:orientation="vertical"
        >
        <TextView