DBHelper.java

package com.llf.common.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by llf on 2017/3/1.
 * 数据库创建工具类
 * 修改表需要更新数据库版本
 */

public class DBHelper extends SQLiteOpenHelper{
    private static final int VERSION = 1;
    private static final String DATABASE_NAME = "common.db";

    private String CREATE_TABLE = "create table jcode(id integer primary key autoincrement,imgUrl text,title VARCHAR(100),detailUrl VARCHAR(100),content text,author VARCHAR(20),authorImg VARCHAR(100),watch VARCHAR(10),comments VARCHAR(10),like VARCHAR(10))";

    public DBHelper(Context context) {
        super(context, DATABASE_NAME, null, VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(CREATE_TABLE);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        switch (newVersion){
            case 2:
                break;
            case 3:
                break;
            case 4:
                break;
            default:
                break;
        }
    }
}