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_gps_info.xml

@@ -1,6 +1,7 @@
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:background="@drawable/ic_bground"
    android:layout_height="match_parent">
    <ListView
        android:layout_width="match_parent"