Android stadio litepal

今天看到技术交流群里有人招聘Android，要求会litepal.

我立马百度了下。嗯，我的学习技术的精神，是值得称赞的。

litepal就是操作数据库的一个框架。git地址：

https://github.com/LitePalFramework/LitePal/blob/master/README.md

使用很简单，readme都写好了。

1.配置

Android stadio gradle里面增加

compile ‘org.litepal.android:core:1.3.1’

2.清单文件配置

在application节点增加

android:name=”org.litepal.LitePalApplication”

3.在src main 下的assets 新建litepal.xml

里面格式：

<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 automaticly for you.
        For example:
        <dbname value="demo" ></dbname>
    -->
    <dbname value="demo" ></dbname>

    <!--
        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 automaticly without concern.
            For example:
        <version value="1" ></version>
    -->
    <version value="1" ></version>

    <!--
        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>
            <mapping class="com.test.model.Magazine"></mapping>
        </list>
    -->
    <list>
        <mapping class="cn.xinyu.com.myapplication.db.Student"></mapping>
    </list>
</litepal>

4.写数据库的bean

public class Student extends DataSupport {
    private String name;
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}

5.在litepal里面写上

<mapping class="cn.xinyu.com.myapplication.db.Student"></mapping>

6.

//这句话就会生成所有litepal配置的表
  SQLiteDatabase db = Connector.getDatabase();

7.增删改查自己看api吧。会Android原生的sqlite,学这个五分钟。

Student student=new Student();
        student.setName("caoxinyu");
        student.setAge(18);
        student.save();
        List<Student> cursor=DataSupport.findAll(Student.class);
        System.out.println(cursor.size());