android数据库框架SugarORM的简单使用

浅浅的花香味﹌ 2022-07-14 06:46 423阅读 0赞

原文地址：http://satyan.github.io/sugar/getting-started.html

复杂使用地址：http://satyan.github.io/sugar/creation.html

步骤1：下载

Gradle:

compile 'com.github.satyan:sugar:1.5'

步骤2：配置

AndroidManifest.xml

<application android:label="@string/app_name" android:icon="@drawable/icon"
    android:name="com.orm.SugarApp">//使用SugarApp的Application
    <meta-data android:name="DATABASE" android:value="sugar_example.db" />  //数据库名称
    <meta-data android:name="VERSION" android:value="2" />      //数据库版本号
    <meta-data android:name="QUERY_LOG" android:value="true" />    //log
    <meta-data android:name="DOMAIN_PACKAGE_NAME" android:value="com.example" /> //实体类包名
    .
    .
    </application>

步骤3：实体类

public class Book extends SugarRecord {
        
      String title;
      String edition;
    
      public Book(){
        
      }
    
      public Book(String title, String edition){
        
        this.title = title;
        this.edition = edition;
      }
    }

或者：

@Table
    public class Book {
        
      private Long id;
    
      public Book(){
        
      }
    
      public Book(String title, String edition){
        
         this.title = title;
         this.edition = edition;
      }
    
      public Long getId() {
        
          return id;
      }
    }

步骤4：基本使用方法

保存Entity:

Book book = new Book("Title here", "2nd edition")
    book.save();

加载 Entity:

Book book = Book.findById(Book.class, 1);

更新 Entity:

Book book = Book.findById(Book.class, 1);
    book.title = "updated title here"; // modify the values
    book.edition = "3rd edition";
    book.save(); // updates the previous entry with new values.

删除 Entity:

Book book = Book.findById(Book.class, 1);
    book.delete();

批量操作:

List<Book> books = Book.listAll(Book.class);
    
    Book.deleteAll(Book.class);