Android | Sqlite3

Android 數據庫建立及使用:

建立:

 

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 = "數據庫|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;
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL(CREATE_USER);
        Log.d(TAG, "onCreate: "+"用戶表建立");
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
        sqLiteDatabase.execSQL("drop table if exists User");
        onCreate(sqLiteDatabase);
    }
}

 

 

 

在構造方法中有四個參數:

    context : 全局上下文

    name : 數據庫名

    CursorFactory : 返回自定義遊標

    version : 版本號，發生改變後執行 OnUpgrade 方法

 

Adb Shell :

    配置環境變量 : Path : D:\AndroidSdk\platform-tools
    cd : data\data\項目名\database\

    sqlite3 數據庫名稱

    .table查看錶