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Егор Глухов's questions

Martin Hope
Егор Глухов
Asked: 2020-11-10 00:44:20 +0000 UTC
  • 0

我正在使用 ViewModelProviders。但是今天，更新库后，出现了 30 条消息。据我了解， ViewModelProviders 已不再可用并需要更换，我查看了 developer.google 但不明白用什么来代替它？我的代码：

**
 * Kotlin extensions for dependency injection
 */

inline fun <reified T : ViewModel> FragmentActivity.injectViewModel(factory: ViewModelProvider.Factory): T {
    return ViewModelProviders.of(this, factory)[T::class.java]
}

inline fun <reified T : ViewModel> Fragment.injectViewModel(factory: ViewModelProvider.Factory): T {
    return ViewModelProviders.of(this, factory)[T::class.java]
}

你能解释为什么它被弃用吗？

android
Martin Hope
Егор Глухов
Asked: 2020-04-01 12:15:44 +0000 UTC
  • 1

我想知道如何正确存储缓存？也就是说，我想听听关于如何最好地存储它的建议。例如，我是这样想的：下载信息，保存到缓存中。如果用户使用从 Internet 下载的信息切换回视图，那么我们会发布现有的视图，并检查已经过去了多少时间。然后是存储的问题。因为，新的信息进来了，但是旧的信息没有被删除，然后就出现了一个逻辑问题。下载新信息时删除它，在什么时间之后。还是每天重置？我想听听一个建议。你如何实现缓存存储。

java
Martin Hope
Егор Глухов
Asked: 2020-03-27 09:22:18 +0000 UTC
  • 0

我正在尝试从收到的 JSON 数据创建一个数据库

const val CURRENT_USER_ID = 0

@Entity(tableName = "current_user")
data class User_new(
    @SerializedName("avatar")
    val avatar: String,
    @SerializedName("balance")
    val balance: Double,
    @SerializedName("id")
    val id_user: Int,
    @SerializedName("login")
    val login: String,
    @SerializedName("not_adult")
    val notAdult: Int,
    @SerializedName("token")
    val token: String
){
    @PrimaryKey(autoGenerate = false)
    var id: Int = CURRENT_USER_ID
}

此处使用数据类

   data class authClient(
    @SerializedName("msg")
    val msg: String,
    @SerializedName("response")
       val user: User_new,
    @SerializedName("status")
    val status: String
)

基础创建

@Dao
interface CurrentUserDao {

    @Insert(onConflict = OnConflictStrategy.REPLACE)
    fun upset(weatherEntry: User_new)

    @Query("select * from current_user where id = $CURRENT_USER_ID")
    fun getGlavsMetric(): LiveData<ImperialCurrentUserEntry>
}

ImperialCurrentUserEntry

data class ImperialCurrentUserEntry(
    @ColumnInfo(name = "avatar")
    override val avata_user: String,
    @ColumnInfo(name = "balance")
    override val balance_user: Double,
    @ColumnInfo(name = "id_user")
    override val id_user_a: Int,
    @ColumnInfo(name = "login")
    override val login_user: String,
    @ColumnInfo(name = "notAdult")
    override val notAdult_user: Int,
    @ColumnInfo(name = "token")
    override val token_user: String
):UnitSpecificCurrentUser

预测数据库

@Database(
    entities = [User_new::class],
    version = 1
)
abstract class ForecastDatabase : RoomDatabase() {
    abstract fun currentGlavsDao():CurrentUserDao

    companion object {
        @Volatile private var instance: ForecastDatabase? = null
        private val LOCK = Any()

        operator fun invoke(context: Context) = instance ?: synchronized(LOCK){
            instance ?: buildDatabase(context).also { instance = it}
        }

        private fun buildDatabase(context: Context)=
                Room.databaseBuilder(context.applicationContext,
                    ForecastDatabase::class.java, "forecast.db")
                    .build()
    }
}

像这样打电话

    GlobalScope.launch(Dispatchers.Main) {
        val textcurrent = apiServer
            .getAuth("Login","Pass").await()

        textView.text = textcurrent.user.toString()
    }

启动程序并获取链接后出现错误 错误

对这个代码发誓

val textcurrent = apiServer
            .getAuth("Login","Pass").await()

很抱歉文字很多，请帮忙

android