Java 如何避免在Android Room中复制

我想创建一个应用程序来存储滑板车的名称，但当我搜索名称时，我会得到重复的名称，我使用的是Android的Room，这是我的代码。任何人请帮助我，谢谢

波乔班

Dao接口

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如果你想在你的鸟舍里保持电池和代码的唯一性，可以设置如下注释

@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;

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通过调用

insertBirds

共享有关如何存储数据的代码。我已经共享了代码，Birds类和BirdLocation类是我的改装POJO类，BirdsRoom是entitiy classIt它给了我以下错误：android.database.sqlite.SQLiteConstraintException:唯一约束失败：BirdsRoom.code（代码2067）当您的BirdsRoom已准备就绪并且您更改了BirdsRoom时，您必须迁移数据库或uninstal应用程序，然后使用新的BirdsRoom重新安装。不，这没有帮助，第一次运行成功，但第二次运行失败。感谢我添加了（onconfig=ConflictStrategy.REPLACE）它有帮助，非常感谢

@Query("SELECT * FROM BirdsRoom" )
List<BirdsRoom> getCachedBirds();

@Insert(onConflict = OnConflictStrategy.REPLACE)
void insertBirds(BirdsRoom... birdsRoom);

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);

@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;