import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import androidx.annotation.Nullable;/** * 参考: *https://blog.csdn.net/fenghuochengshan/article/details/129348726*h
SampleDbOpenHelper.java 代码语言:javascript 代码运行次数:0 运行 AI代码解释 package org.jssec.android.sqlite; import android.content.Context; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; impor...
android.database.sqlite.SQLiteOpenHelper.SQLiteOpenHelper(Context context, String name, CursorFactory factory,intversion) publicSQLiteOpenHelper (Context context, String name, SQLiteDatabase.CursorFactory factory,intversion) Since: API Level1 Create a helper object to create, open, and/or manage a database...
@Override protected void onDestroy() { db.delete(SQLiteHelper.TB_NAME, null, null); super.onDestroy(); } 至此 一个简单的数据库操作基本完成了,下面我们来看看需要掌握的知识: Android中每一个数据库对创建它的应用程序包套件来说都是私有的,默认情况下其他应用程序无法直接访问此私有数据库。所有的数据...
Android提供了一个名为SQLiteDatabase 的类，它封装了一些操作数据库的 API，使用该类可以完成对数据进行添加（Create）、查询（Retrieve）、更新（Update）和删除（Delete）操作。获取 SQLiteDatabase类的对象要通过 SQLiteOpenHeper 调用getReadableDatabase()方法具体如下∶OpenHelperopenHelper=new OpenHelper(context); ...
/* * @author:conowen * @date:12.2.29 */ package com.conowen.sqlite; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteDatabase.CursorFactory; import android.database.sqlite.SQLiteOpenHelper; public class DbHelper extends SQLiteOpenHelper...
Android.Hardware.Camera2.Params Android.Hardware.Display Android.Hardware.Fingerprints Android.Hardware.Input Android.Hardware.Lights Android.Hardware.Location Android.Hardware.Usb Android.Health.Connect Android.Health.Connect.ChangeLog Android.Health.Connect.DataTypes ...
import android.database.sqlite.SQLiteDatabase; public class DBManager { private DatabaseHelper dbHelper; private Context context; private SQLiteDatabase database; public DBManager(Context c) { context = c; } public DBManager open() throws SQLException { ...
.NET for Android API 34 SQLiteClosable SQLiteConstraintException SQLiteCursor SQLiteDatabase SQLiteDatabase.ICursorFactory SQLiteDatabase.OpenParams SQLiteDatabase.OpenParams.Builder SQLiteDatabaseCorruptException SQLiteDatabaseLockedException SQLiteDatatypeMismatchException ...
importandroid.database.sqlite.SQLiteOpenHelper; importandroid.database.sqlite.SQLiteDatabase.CursorFactory; // 数据库操作的 Helper 类 publicclassDatabaseHelperextendsSQLiteOpenHelper { DatabaseHelper(Context context, String name, CursorFactory cursorFactory,intversion) { ...