我正在尝试使用Kotlin实现Dialogflow(以前的api.ai)代理与我的Android应用程序的集成。我检查了关于kotlin lateinit
的其他Q& A,并且Android中的onCreate()生命周期非常适合后期初始化实现,以避免使用空对象和相应的!!
和?
编写脏代码访问Kotlin。但是我遇到了属性getter或setter期待的错误'在尝试lateinint
自定义类的实例时。这是代码:
class AIApplication : Application() {
private var activitiesCount: Int = 0
var lateinit settingsManager: SettingsManager
//private set
private val isInForeground: Boolean
get() = activitiesCount > 0
override fun onCreate() {
super.onCreate()
settingsManager = SettingsManager(this)
}
这给了我错误的' 预期属性getter或setter '在lateinit settingsManager
行。以下是SettingsManager
定义:
class SettingsManager(private val context: Context) {
private val prefs: SharedPreferences
private var useBluetooth: Boolean = false
var isUseBluetooth: Boolean
get() = useBluetooth
set(useBluetooth) {
this.useBluetooth = useBluetooth
prefs.edit().putBoolean(PREF_USE_BLUETOOTH, useBluetooth).commit()
val controller = (context.applicationContext as AIApplication).getBluetoothController()
if (useBluetooth) {
controller!!.start()
} else {
controller!!.stop()
}
}
init {
prefs = context.getSharedPreferences(SETTINGS_PREFS_NAME, Context.MODE_PRIVATE)
useBluetooth = prefs.getBoolean(PREF_USE_BLUETOOTH, true)
}
companion object {
private val SETTINGS_PREFS_NAME = "ai.api.APP_SETTINGS"
private val PREF_USE_BLUETOOTH = "USE_BLUETOOTH"
}
}
那么这样做的正确方法是什么?我是否需要对SettingsManager类进行一些更改?请清楚解释整个概念。
答案 0 :(得分:1)
SettingsManager的lateinit声明是错误的。试试这个:
lateinit var settingsManager: SettingsManager
而不是
var lateinit settingsManager: SettingsManager
希望这有帮助。