4.22日软件开发日记：今天我干了什么？

昨天完成了数据表的增加和删除

那今天完成以下展示吧

package zzm.org.kebiaojiemian;
import android.app.Application;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

public class DataBase extends SQLiteOpenHelper {

    private final static String DB_NAME="myBase";
    private static String[] TB_NAME= new String[]{"Mon", "Tue", "Wed", "Thur", "Fri", "Sat", "Sun"};
    public  final static String ID="_id";
    public final static String CLASS="classes";
    public final static String LOCA="location";
    public final static String TEACHER="teacher";
    public final static String ZHOUSHU="zhoushu";
    public final static String JIESHU="jieshu";
    public final static String TIME1="time1";
    public final static String TIME2="time2";
    public final static String WHICH="which";

    public DataBase(Context context){
        super(context,DB_NAME,null,1);
    }
    @Override
    public void onCreate(SQLiteDatabase db) {

        for(int i=0;i<7;i++){
            String sql="CREATE TABLE "+TB_NAME[i]+" (_id INTEGER primary key autoincrement,classes varchar(70),location varchar(70)," +
                    "teacher varchar(70),zhoushu varchar(70),time1 varchar(70),time2 varchar(70),jieshu varchar(70),which varchar(70))";
            db.execSQL(sql);
        }

    }
    @Override
    public void onUpgrade(SQLiteDatabase db, int oleVersion, int newVersion) {
        for(int i=0;i<7;i++){
            String sql="DROP TABLE IF EXISTS "+TB_NAME[i];
            db.execSQL(sql);
        }
        onCreate(db);

    }
    public Cursor select(int i){

        SQLiteDatabase db=DataBase.this.getReadableDatabase();
        Cursor cursor=db.query(TB_NAME[i],null,null,null,null,null,null);
        return cursor;
    }
    public  long insert(int i,String cla,String loca,String tea,String zhou,String jie,String time1,String time2,String which){
        SQLiteDatabase db=DataBase.this.getWritableDatabase();
        ContentValues cv=new ContentValues();
        cv.put(CLASS,cla);
        cv.put(LOCA, loca);
        cv.put(TEACHER,tea);
        cv.put(ZHOUSHU,zhou);
        cv.put(JIESHU,jie);
        cv.put(TIME1,time1);
        cv.put(TIME2,time2);
        cv.put(WHICH,which);
        long row=db.insert(TB_NAME[i],null,cv);
        return row;
    }
    public void update(int i,int _id,String cla,String loca,String tea,String zhou,String jie,String time1,String time2,String which){
        SQLiteDatabase db=DataBase.this.getWritableDatabase();
        String where="_id = ?";
        String[] whereValues={Integer.toString(_id)};
        ContentValues cv=new ContentValues();
        if(!cla.equals("")) cv.put(CLASS,cla);
        if(!loca.equals("")) cv.put(LOCA, loca);
        if(!tea.equals("")) cv.put(TEACHER,tea);
        if(!zhou.equals("")) cv.put(ZHOUSHU,zhou);
        if(!jie.equals("")) cv.put(JIESHU,jie);
        if(!time1.equals("")) cv.put(TIME1,time1);
        if(!time2.equals("")) cv.put(TIME2,time2);
        if(!which.equals("")) cv.put(WHICH,which);
        db.update(TB_NAME[i], cv, where, whereValues);
    }
    public void deleteData(int i,int _id){
        SQLiteDatabase db=DataBase.this.getWritableDatabase();
        String where="_id = ?";
        String[] whereValues={Integer.toString(_id)};
        ContentValues cv=new ContentValues();
        cv.put("classes","");
        cv.put("location","");
        cv.put("teacher","");
        cv.put("zhoushu","");
        cv.put("jieshu","");
        cv.put("time1","");
        cv.put("time2","");
        cv.put("which","");
        db.update(TB_NAME[i], cv, where, whereValues);
    }
    public void delete(int i,int _id){
        SQLiteDatabase db=this.getWritableDatabase();
        String where="_id = ?";
        String[] whereValues={Integer.toString(_id)};
        db.delete(TB_NAME[i], where, whereValues);
    }
    public  void createTable(int j){

        for(int i=1;i<=12;i++)
            insert(j,"", "", "","","","","","");

    }

}