Android次更新房间后，更新其他livedata

Question

我的数据库有两个数据，我有两个livedata来观察这两个数据，当我更新一条数据时，livedata1变了，但是问题来了，livedata2也变了。这是我的代码，这有什么问题。

    val userDB = UserDB.getInstance(this)
    var userDao = userDB?.getUserDao()

    val live0: LiveData<List<UserBean>>? = userDao?.getUser(0)
    val live1: LiveData<List<UserBean>>? = userDao?.getUser(1)
    val userBean1 = UserBean("jack", 10, 1)
    val userBean2 = UserBean("david", 20, 0)

    CoroutineScope(Dispatchers.IO).launch {
        (0..5).forEach {
            delay(1000)
            userDao?.updateUserAge(it, "jack")
        }
    }
    live0?.observe(this, {
        it.forEach { index ->
            Log.e("live0 ------->",
                "id = ${index.id} ,name = ${index.userName} ,age = ${index.age} ,gender = ${index.gender}")
        }
    })
    live1?.observe(this, {
        it.forEach { index ->
            Log.e("live1 ------->",
                "id = ${index.id} ,name = ${index.userName} ,age = ${index.age} ,gender = ${index.gender}")
        }
    })


@Dao

接口 UserDao {

@Insert
fun insertUsers(vararg users: UserBean)

@Query("UPDATE UserBean SET age =:age WHERE name =:name")
suspend fun updateUserAge(age: Int, name: String)

@Query("SELECT * FROM UserBean where gender =:gender ORDER BY ID DESC")
fun getUser(gender: Int): LiveData<List<UserBean>>

}

这是我的 logcat enter image description here

Answer 1

当您在 table 中进行任何更改时，实时数据会向您发送更新，因此它工作正常，您必须围绕此构建逻辑。

Android次更新房间后，更新其他livedata

After Android update the room, other livedata is update

android

android-room

android-livedata