Mobile development technology (Android) -- Experiment 8 use of SQLite database

1, Experimental purpose Master the method of creating SQLite database;Master the methods of adding, deleting, modifying and querying SQLite data;Learn to use debugging tools to view databases and data tables; 2, Experimental content Create an Android project named "shiyan0801_ professional"_ ××× (name of stude ...

Posted on Tue, 23 Nov 2021 17:59:59 -0500 by leena

Jetpack: Room super detailed use pit guide!

1, Introduction ORM(Object Relational Mapping) relational mapping library provides a layer of encapsulation on Sqlite to optimize the convenience of database operation. The architecture diagram of Room is as follows: Entity: an entity corresponds to a table in the database. Entity class is the mapping of Sqlite table structure to Java ...

Posted on Sat, 20 Nov 2021 07:10:04 -0500 by neo0506

Android room tells about object relationship through the story of big head son

Pay attention to official account and learn more knowledge summary sqlite is a relational database, so object relationship is an important part. For example, the data we define includes forests and trees, and forests contain trees. At this time, the defined forest should contain a tree object, which is the object relationship between forest ...

Posted on Fri, 19 Nov 2021 15:34:49 -0500 by mkosmosports

Research on mobile Internet development technology teaching website project part 7

2021@SDUSC Realization of positioning function private LocationClient mLocationClient = null; private MyLocationConfiguration.LocationMode locationMode; private MyLocationConfiguration.LocationMode mLocationMode; For the first time, you need to make preparations and do not configure the Android positioning SDK of Baidu map. You can obtain t ...

Posted on Fri, 19 Nov 2021 06:51:40 -0500 by imurkid

Android connects to the database to realize login and registration function (SQLite)

What is SQLite SQLite is a software library that implements a self-sufficient, serverless, zero configuration and transactional SQL database engine. SQLite is the most widely deployed SQL database engine in the world. SQLite source code is not subject to copyright restrictions. Here are some useful websites for learning about SQLite: 1,SQ ...

Posted on Thu, 28 Oct 2021 14:16:15 -0400 by taya

Use of Android sqlite database (addition, deletion, modification and query)

Introduction to sqlite sqlite is a light embedded database, which is mostly used for mobile phones, car machines, etc. as for its principle, Baidu has many bosses to introduce him in detail, so I won't elaborate here. Today, I mainly want to record the detailed use of sqlite. I mainly understand the addition, deletion, modification and query o ...

Posted on Tue, 05 Oct 2021 19:07:12 -0400 by GaryC

SQL programming for DataWhale team learning - September - task1

Task1 introduction database 1, Basic SQL statement 1.1 create database Syntax: CREATE DATABASE < Database name > ; 1.2 create data table Syntax: CREATE TABLE < Table name > ( < Column name 1> < data type > < Constraints required for this column > , < Column name 2> < data type > < Constrain ...

Posted on Tue, 14 Sep 2021 18:37:49 -0400 by gordonmc

Design and implementation of Finance app

I. Main Interface   1. Interface Effect    2. Preparations (1) Create a folder under the project package name Select the package name of the project - right-click - new - package - append the input activity after the current content - click the ok button to generate the activity folder. (2) Create six subpages in the ...

Posted on Sat, 04 Sep 2021 12:29:23 -0400 by temujinleal

Mobile development technology (Android) -- Experiment 3 common basic Android controls

1, Experimental purpose Master the syntax and format of adding controls to XML files;Master the common properties of controls;Master the method of obtaining controls in Java code;Familiar with the common properties and methods of text box, edit box, ordinary button and picture button.Master several ways to implement Button and ImageButton ...

Posted on Fri, 03 Sep 2021 17:50:42 -0400 by tonypr100

Remove sqlite3, the module installed by php7 compilation

Remove the modules installed by php7 compilation. Take sqlite3 as an example SQLite3 extension has been enabled by default since PHP 5.3.0. Allow -- without SQLite3 disabled at compile time background When I develop a project, I need to use php to connect to the encrypted sqlite database, but the sqlite extension compiled by php by default do ...

Posted on Thu, 18 Jun 2020 05:05:33 -0400 by Pigmaster