我想创建一个存储踏板车名称的应用程序,但是当我搜索名称时,我得到的重复项是,我正在使用Room for Android,这是我的代码。任何人都请帮助我,谢谢。
POJO类
@PrimaryKey(autoGenerate = true)
private int id;
@ColumnInfo(name = "battery")
private String battery;
@ColumnInfo(name = "code")
private String birdCode;
@ColumnInfo(name = "latitude")
private double lat;
@ColumnInfo(name = "longitude")
private double lng;
Dao界面
@Query("SELECT * FROM BirdsRoom" )
List<BirdsRoom> getCachedBirds();
@Insert(onConflict = OnConflictStrategy.REPLACE)
void insertBirds(BirdsRoom... birdsRoom);
我如何插入数据
Birds birds = response.body().getBirdsList().get(i);
BirdLocation birdLocation = birds.birdLocation;
BirdLocation location = birds.birdLocation;
BirdsRoom birdsRoom = new BirdsRoom(birds.getCode(),birds.getBatteryLevel(),
birdLocation.getLat(), birdLocation.getLng());
birdsDatabase.getUserDao().insertBirds(birdsRoom);
答案 0 :(得分:0)
如果您想在BirdsRoom中成为唯一的电池和代码来设置如下所示的注释
@Entity(indices = {@Index(value = {"battery", "code"}, unique = true)})
public class BirdsRoom {
@PrimaryKey(autoGenerate = true)
private int id;
@ColumnInfo(name = "battery")
private String battery;
@ColumnInfo(name = "code")
private String birdCode;
@ColumnInfo(name = "latitude")
private double lat;
@ColumnInfo(name = "longitude")
private double lng;