Android配置LitePal

最新推荐文章于 2024-06-15 21:14:06 发布

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本文介绍了如何在Android应用中集成 LitePal 库来管理数据库。首先，你需要在 build.gradle 文件中添加 LitePal 的依赖。接着，创建 assets/litepal.xml 文件配置数据库名称和版本。然后，在 AndroidManifest.xml 中指定 LitePalApplication 或在自定义 Application 类中初始化 LitePal。这个过程允许自动化创建和升级数据库表格，简化了数据操作。

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1、引入库

项目地址:https://github.com/guolindev/LitePal

在 build.gradle 中如下配置

dependencies {
    implementation 'org.litepal.guolindev:core:3.2.3'
}

2、配置litepal.xml

在main文件下新建文件夹assets，再在其中创建litepal.xml文件

<?xml version="1.0" encoding="utf-8"?>
<litepal>
    <!--
    	Define the database name of your application. 
    	By default each database name should be end with .db. 
    	If you didn't name your database end with .db, 
    	LitePal would plus the suffix automatically for you.
    	For example:    
    	<dbname value="demo" />
    -->
    <dbname value="demo" />

    <!--
    	Define the version of your database. Each time you want 
    	to upgrade your database, the version tag would helps.
    	Modify the models you defined in the mapping tag, and just 
    	make the version value plus one, the upgrade of database
    	will be processed automatically without concern.
			For example:    
    	<version value="1" />
    -->
    <version value="1" />

    <!--
    	Define your models in the list with mapping tag, LitePal will
    	create tables for each mapping class. The supported fields
    	defined in models will be mapped into columns.
    	For example:    
    	<list>
    		<mapping class="com.test.model.Reader" />
    		<mapping class="com.test.model.Magazine" />
    	</list>
    -->
    <list>
    </list>
    
    <!--
        Define where the .db file should be. "internal" means the .db file
        will be stored in the database folder of internal storage which no
        one can access. "external" means the .db file will be stored in the
        path to the directory on the primary external storage device where
        the application can place persistent files it owns which everyone
        can access. "internal" will act as default.
        For example:
        <storage value="external" />
    -->
    
</litepal>

3、配置LitePalApplication

在 AndroidManifest.xml 文件中配置如下：

<manifest>
    <application
        android:name="org.litepal.LitePalApplication"
        ...
    >
        ...
    </application>
</manifest>

如果这一步出现 LitePalApplication 标红的情况，需要重新同步一下。

当然这一步也可以不配置，在onCreate() 方法中添加：

public class MyOwnApplication extends Application {

    @Override
    public void onCreate() {
        super.onCreate();
        LitePal.initialize(this);
    }
    ...
}