DatabaseHelper

ShowMe/src/DataBase/src/main/java/com/showme/database/DatabaseHelper/CourseSQLHelper.java

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+package com.showme.database.DatabaseHelper;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+public class CourseSQLHelper extends SQLiteOpenHelper {
+    private static final String db_name = "course";//自定义的数据库名；
+    private static final int version = 2;//版本号
+
+    public CourseSQLHelper(Context context) {
+        super(context, db_name, null, version);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL("create table courses(" +
+                "id integer primary key autoincrement," +
+                "course_name text," +
+                "teacher text," +
+                "class_room text," +
+                "day integer," +
+                "class_start integer," +
+                "class_end integer," +
+                "weeks text)");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        db.execSQL("drop table if exists schedules");
+        onCreate(db);
+    }
+}

ShowMe/src/DataBase/src/main/java/com/showme/database/DatabaseHelper/ScheduleSQLHelper.java

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+package com.showme.database.DatabaseHelper;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+public class ScheduleSQLHelper extends SQLiteOpenHelper {
+    private static final String db_name = "MySchedule";//自定义的数据库名；
+    private static final int version = 98889;//版本号
+
+    public ScheduleSQLHelper(Context context) {
+        super(context, db_name, null, version);
+    }
+
+    // 该方法会自动调用，首先系统会检查该程序中是否存在数据库名为‘MySchedule’的数据库
+    // 如果存在则不会执行该方法，如果不存在则会执行该方法。
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        String sql = "create table schedules(" +
+                "id Integer primary key autoincrement," +     //id自增,只支持integer不支持int
+                "scheduleName varchar(50)," +
+                "schedulePlace varchar(50)," +
+                "ifSchedulePlace integer," +
+                "startTime varchar(50)," +
+                "ifStartTime integer," +
+                "endTime varchar(50)," +
+                "ifEndTime interger," +
+                "time varchar(30)" +
+                ")";
+        db.execSQL(sql);
+    }
+
+    //数据库版本更新时执行该方法,如果表已存在则先删除再调用onCreate重新创建
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        db.execSQL("drop table if exists schedules");
+        onCreate(db);
+    }
+}

ShowMe/src/DataBase/src/main/java/com/showme/database/utils/CourseSQLUtils.java

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+package com.showme.database.utils;
+
+import android.database.sqlite.SQLiteDatabase;
+
+import com.showme.database.MySQLiteDatabase;
+
+public class CourseSQLUtils {
+    private static SQLiteDatabase courseSQL = MySQLiteDatabase.courseSQL;
+
+}

ShowMe/src/DataBase/src/main/java/com/showme/database/utils/ScheduleSQLUtils.java

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+package com.showme.database.utils;
+
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+
+import com.showme.database.MySQLiteDatabase;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ScheduleSQLUtils {
+    private static SQLiteDatabase database = MySQLiteDatabase.scheduleSQL;
+
+    public static List<String> queryByDate(String date) {
+        //columns为null 查询所有列
+        List<String> res = new ArrayList<>();
+        String aScheduleName;
+        Cursor cursor = database.query("schedules",null,"time=?",new String[]{date},null,null,null);
+        if(cursor.moveToFirst()){
+            int scheduleCount = 0;
+            do{
+                aScheduleName = cursor.getString(cursor.getColumnIndex("scheduleName"));
+                String aStartTime = cursor.getString(cursor.getColumnIndex("startTime"));
+                Integer ifStartTime = cursor.getInt(cursor.getColumnIndex("ifStartTime"));
+                String aEndTime = cursor.getString(cursor.getColumnIndex("endTime"));
+                Integer ifEndTime = cursor.getInt(cursor.getColumnIndex("ifEndTime"));
+                String scheduleText = aScheduleName;
+
+                if(ifStartTime == 1){
+                    scheduleText += "($时间:"+aStartTime;
+
+                    if(ifEndTime ==1){
+                        scheduleText += "\n"+aEndTime;
+                    } else {
+                        scheduleText += "\n24:00";
+                    }
+                } else {
+                    scheduleText += "($时间: 00:00\n24:00";
+                }
+
+                scheduleCount++;
+                res.add(scheduleText);
+            }while (cursor.moveToNext());
+        }
+        cursor.close();
+        return res;
+    }
+
+    public static String extractScheduleName(String scheduleText) {
+        int index = scheduleText.indexOf("($时间:");
+        if (index != -1) {
+            return scheduleText.substring(0, index);
+        }
+        return null;
+    }
+
+    public static String extractScheduleTime(String scheduleText) {
+        int index = scheduleText.indexOf("($时间:");
+        if (index != -1) {
+            return scheduleText.substring(index+5);
+        }
+        return null;
+    }
+
+    public static boolean isScheduleMarked(String date) {
+        Cursor cursor = database.query("schedules",null,"time=?",new String[]{date},null,null,null);
+        return cursor.moveToFirst();
+    }
+}