This example uses SQLite as the data access carrier.
In "sharedpreferences", the automatic storage principle of known data is to use the Java reflection method to obtain the field in the data entity class for storage.When using SQLite as the data access carrier, we need to solve the following problem: how to indicate that a field in the class is a primary key (primary key.
To solve this problem, Java annota
When using SQLite, we usually encapsulate a SQLiteOpenHelper class directly and then operate the class. So here I will mainly talk about how to use SQLiteOpenHelper.
Package com. android. liu. sqlite;
Import android. content. ContentValues;Import android. content. Context;Im
[]{newnumber, name}); Db.close (); } public void Delete (String name) {Sqlitedatabase db = Helper.getwritabledaTabase (); Db.execsql ("Delete from person where name=?", New String[]{name}); Db.close (); } public listPerson classpublic class Person { private int id; private String name; private String number; Public person () { } public person (int id, string name, string number) { this.id = ID; this.name = name; This.number = number;
: http://www.sqlite.org/download.htmlTutorial Address: http://www.runoob.com/sqlite/sqlite-tutorial.html1. Install SQLite in Windows to test.Reference Blog: How to install SQLite on WindowsCopy Sqlite3.def, Sqlite3.dll, and Sqlite3.exe to D:\sqliteTo create a database on the cmd command line, method:Reference blog: SQL
Google for Andriod's larger data processing provides SQLite, he is in the storage, management, maintenance and other aspects of the excellent, the function is very strong. SQLite has the following features:1. LightweightWith SQLite you only need to bring a dynamic library, you can enjoy its full functionality, and the size of the dynamic library want to be small.
I learned a little about SQLite in Android through classroom exercises and surfing the Internet. Here we will share with you.
In Android development, SQLite can be operated in two ways. First, you can use/tools/sqlite3.exe In the Android SDK directory to perform database an
Create an SQLite database in Android, androidsqlite
Database: SQLite (lightweight, embedded database)
Store large amounts of data with similar structures and perform quick queries. Special files (generated in a certain format)
Database creation
Create a file
1. Declare the object. The object will not be created.
File file = new File ("File name ");
2. Write the f
An example of this paper is to analyze the method of Android programming operation embedded Relational SQLite database. Share to everyone for your reference, specific as follows:
SQLite features
A relational database SQLite is embedded in the 1.Android platform, unlike oth
Take a rough look at how the Android database is handled. There are 4 types of data stored locally in Android: Sharepreference, SQLite, Content provider, and file, all stored in the data/data/package name directory. As you can see, Android is largely privatized for data.
SQLi
1. In addition to using files or SharedPreferences to store data, you can also choose to use the SQLite database to store data.
On the Android platform, an embedded relational database-SQLite is integrated. SQLite3 supports NULL, INTEGER, REAL (floating point number), TEXT (string TEXT), and BLOB (binary object) data types, although it supports only five types, s
The previous blog mentioned SQLite, which is an embedded database, because of its lightweight but powerful, is widely used in embedded devices. Later, after the popularity of smartphones and tablets, as a file-based database, it almost became a must-have for the smart Device standalone database, which can be packaged into the APK file with the Android app.The official website of
its type, and if the type does not match the associated column, SQLite attempts to convert the value to the type of the column, and if it cannot, the value will be stored as its own type. How to use SQLite in Android:--sqlitedatabase--sqliteopenhelperpublic class Mainactivity extends Activity {private static final String TABLENAME = "Stutb";@Overrideprotected v
The Android system comes with a database called SQLite. In this article we use a demo to illustrate an example of an Android operating database.by theThe database files created by Android are stored under the/data/data/See the database file, we generally use a visual tool called SQ
David Texas 85000.0
6 Kim south-hall 45000.0
7 James Houston 10000.0
The following example demonstrates the use of a SQLite Boolean expression: SQLite>*=10000; --------------------------------------------------4JamesHouston 10000.0 SQLite-Numeric expressionThese expressions are u
Android data storage Sqlite uses SQLCipher database encryption practices, sqlitesqlcipherPreface:
A recent study of Android Sqlite database (article address: http://www.cnblogs.com/whoislcj/p/5506294.html) and ContentProvider Program Data Sharing (http://www.cnblogs.com/whoislcj/p/5507928.html ), we clearly know the de
SQLite is a built-in database in Android, SQLite is a lightweight database, supports standard SQL syntax, and supports acid things.The Sqliteopenhelper class is available in Android to help us use SQLite. SQLite is an abstract cla
In general, Android itself contains sqlite that are commonly used in embedded systems, which eliminates the effort of developers to transplant their own installations. SQLite supports most SQL92 standards, and many of the most commonly used SQL commands can be used on SQLite, and A
, storing 8 bytes of floating-point numbersText: string literalBlob: Binary Object3. Operation of SQLite database using command modeNeed to configure the environment variables for Android, http://www.cnblogs.com/bluestorm/archive/2012/09/27/2706420.html(1) Open cmd, go to F-disk, execute Sqlite3 mydb.db, create a mydb.db file(2) Create a t_student table and insert a piece of dataIn
About SQLiteGoogle for Andriod's larger data processing provides SQLite, he is in the storage, management, maintenance and other aspects of the excellent, the function is very strong. SQLite has the following features:1. LightweightWith SQLite you only need to bring a dynamic library, you can enjoy its full functionality, and the size of the dynamic library want
This article describes the Android implementation based on sliding SQLite data paging loading technology. Share to everyone for your reference, specific as follows:
Main.xml is as follows:
Mainactivity.java is as follows:
Package com.example.testscrollsqlite;
Import java.util.ArrayList;
Import Android.app.ActionBar.LayoutParams;
Import android.app.Activity;
Import Android.os.Bundle;
Impo
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