Android | Sqlite3

Android 数据库创建及使用:

创建:

 

package he3.sd.dao;import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;/*** Created by asd25 on 2018/6/11 0011.*/public class UserDatabaseHelper extends SQLiteOpenHelper {private Context context;private String TAG = "数据库|DEBUG >>>:";public static final String CREATE_USER = "create table User("+"id integer primary key autoincrement,"+"sessionId text,"+"companyList text,"+"isActivate integer)";public UserDatabaseHelper(Context context, String name, SQLiteDatabase.CursorFactory factory,int version) {super(context,name,factory,version);this.context = context;}@Overridepublic void onCreate(SQLiteDatabase sqLiteDatabase) {sqLiteDatabase.execSQL(CREATE_USER);Log.d(TAG, "onCreate: "+"用户表创建");}@Overridepublic void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {sqLiteDatabase.execSQL("drop table if exists User");onCreate(sqLiteDatabase);}
}

 

 

 

在构造方法中有四个参数:

    context : 全局上下文

    name : 数据库名

    CursorFactory : 返回自定义游标

    version : 版本号，发生改变后执行 OnUpgrade 方法

 

Adb Shell :

    配置环境变量 : Path : D:\AndroidSdk\platform-tools
    cd : data\data\项目名\database\

    sqlite3 数据库名称

    .table查看表