ActiveAndroid是一个轻量级的ORM框架,可以以类的方式简单快捷地进行数据库的管理,而无需编写一个单独的SQL语句。 ActiveAndroid git地址 配置 1、AndroidManifeset中添加如下配置: <application ... android:name="com.activeandroid.app.Application" > <meta-data android:name="AA_DB_NAME" android:value="xxx.db" /> <meta-data android:name="AA_DB_VERSION" android:value="7" /> <meta-data android:name="AA_MODELS" android:value="com.syd.oden.odendemo.entity.sqltab.LocationTab, com.syd.oden.odendemo.entity.sqltab.MusicFavorTab" /> AA_MODELS为数据库中表的实体类 2、Application继承com.activeandroid.app.Application public class MyApplication extends com.activeandroid.app.Application {} 或者 public class MyApplication extends SomeLibraryApplication { @Override public void onCreate() { super.onCreate(); ActiveAndroid.initialize(this); } @Override public void onTerminate() { super.onTerminate(); ActiveAndroid.dispose(); } } 3、创建表 @Table(name = "PictureTabs") public class PictureTab extends Model { private static MyLog myLog = new MyLog("[PictureTab] "); @Column(name = "dirName") String dirName; @Column(name = "fileName") String fileName; @Column(name = "describe") String describe; @Column(name = "longitude") double longitude; @Column(name = "latitude") double latitude; public PictureTab() { super(); } public PictureTab(String dirName, String fileName, double longitude, double latitude) { super(); this.dirName = dirName; this.fileName = fileName; this.longitude = longitude; this.latitude = latitude; } } 增删改查 增 for (int i=0; i<5; i++) { DbBlesGroup dbBleGroup = new DbBlesGroup(); dbBleGroup.groupIndex = i; dbBleGroup.groupName = "groupName" + i; dbBleGroup.addr = "addr" + i; dbBleGroup.name = "name" + i; dbBleGroup.save(); } 查 查出所有 List<DbBlesGroup> dbBleGroupList = new ArrayList<>(); dbBleGroupList = new Select() .from(DbBlesGroup.class) .orderBy("groupName ASC") .execute(); for (int i=0; i<dbBleGroupList.size(); i++) { L.d("dbBleGroupList :" + dbBleGroupList.get(i).groupName); } 指定条件查找 List<DbBlesGroup> dbBleGroupList = new ArrayList<>(); dbBleGroupList = new Select() .from(DbBlesGroup.class) .where("groupName = ?", "groupName3") .orderBy("groupName ASC") .execute(); 多条件查找 newSelect().from(UserViewTab.class).where("viewId=? and bleAddr=?",viewId,addr).executeSingle(); 使用事务(transaction) ActiveAndroid.beginTransaction(); try { for (int i = 0; i < 100; i++) { Item item = new Item(); item.name = "Example " + i; item.save(); } ActiveAndroid.setTransactionSuccessful(); } finally { ActiveAndroid.endTransaction(); } .orderBy(“id DESC”)降序 .orderBy(“id ASC”)升序 删除 new Delete().from(DbBlesGroup.class).where("groupName = ?", "groupName2").execute(); 改 new Update(DbBlesGroup.class).set("addr = ?", "123").where("groupName = ?", "groupName2").execute(); 也可直接用save修改 注意事项 1、构造方法中记得加入super(); 2、在sudio2.2运行报错解决: erro: 'java.lang.String com.activeandroid.TableInfo.getTableName()' on a null object reference. 关掉Instant Run
3、表中包含另一个表,则保存的时候要先保存另一个表; 发现一个bug,表中包含另一个表,查另一个表里的数据可能有误 recipeAlarmList.add(RecipeAlarmTab.getById(recipeTab.getRecipeAlarmTab1().getId())); //activeAndroid貌似有bug,故通过ID重新查询一次