基于Android studio 的课程表增删查改功能（基于sqlite）

Android studio 用SQLite实现课程表的增删查改功能，：实现详情浏览、编辑、及新增功能。课程编号可以实现正则检查（编号规则XX00000，XX表示两位大写的字母，00000表示五位十进制数字），并保证编号的唯一性。

package com.example.kcb;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class AboutActivity extends AppCompatActivity {
    @Override
    protected void onCreate（Bundle savedInstanceState） {
        super.onCreate（savedInstanceState）;
        setContentView（R.layout.activity_about）;
    }
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-01-09 03:50  CourseTable-master\
     文件         760  2019-01-09 03:50  CourseTable-master\.gitignore
     目录           0  2019-01-09 03:50  CourseTable-master\.idea\
     目录           0  2019-01-09 03:50  CourseTable-master\.idea\caches\
     文件         535  2019-01-09 03:50  CourseTable-master\.idea\caches\build_file_checksums.ser
     目录           0  2019-01-09 03:50  CourseTable-master\.idea\codestyles\
     文件        1775  2019-01-09 03:50  CourseTable-master\.idea\codestyles\Project.xml
     文件        2101  2019-01-09 03:50  CourseTable-master\.idea\misc.xml
     文件         359  2019-01-09 03:50  CourseTable-master\.idea\modules.xml
     文件         564  2019-01-09 03:50  CourseTable-master\.idea\runConfigurations.xml
     文件         167  2019-01-09 03:50  CourseTable-master\.idea\vcs.xml
     文件       11357  2019-01-09 03:50  CourseTable-master\LICENSE
     目录           0  2019-01-09 03:50  CourseTable-master\app\
     文件           7  2019-01-09 03:50  CourseTable-master\app\.gitignore
     文件         476  2019-01-09 03:50  CourseTable-master\app\build.gradle
     文件         919  2019-01-09 03:50  CourseTable-master\app\proguard-rules.pro
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\
     文件        1037  2019-01-09 03:50  CourseTable-master\app\src\main\AndroidManifest.xml
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\java\
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\
     文件         329  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\AboutActivity.java
     文件        2326  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\AddCourseActivity.java
     文件        1469  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\Course.java
     文件         869  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\DatabaseHelper.java
     文件        7145  2019-01-09 03:50  CourseTable-master\app\src\main\java\com\example\kcb\MainActivity.java
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\res\
     目录           0  2019-01-09 03:50  CourseTable-master\app\src\main\res\drawable\
     文件        2962  2019-01-09 03:50  CourseTable-master\app\src\main\res\drawable\above.png
............此处省略27个文件信息