我在Java中有类似于这个方法声明的东西。假设该类名为public T execute(String s, Function<T> f, Object... args) {}
：
val arg1 = ""
val arg2: String? = null
val javaObject = JavaClass()
javaObject.execute("some string", { print(it) }, arg1, arg2)
如果我想从Kotlin打电话给我（我的版本是1.2.21），我可以写一些类似的东西：
IllegalStateException奇怪的是，我在执行此代码时得到arg2 must not be null。它说args。我能理解它是否说["", null]不能为空。但考虑到这个调用会导致数组看起来像null，这在Java中完全没问题，这看起来很奇怪。
我需要能够将 const MyTabnav = TabNavigator({ScreenOne: {
screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
navigationOptions: {
tabBarLabel: 'ScreenOne',
tabBarIcon: ({ tintColor }) => (
<View style={[styles.tabViewBox]}>
<Text style={[styles.tabText, { color: tintColor }]}>ScreenOne</Text>
</View>
)
}
},
ScreenTwo: {
screen: ({ navigation, screenProps }) => <ScreenOneNav screenProps={{ tabbarNavigation: navigation, ...screenProps, }} onNavigationStateChange={null} />,
navigationOptions: {
tabBarLabel: 'ScreenOne',
tabBarIcon: ({ tintColor }) => (
<View style={[styles.tabViewBox]}>
<Text style={[styles.tabText, { color: tintColor }]}>ScreenTwo</Text>
</View>
)
}
},
ScreenThree: {
screen: ({ navigation, screenProps }) => <StockNotificationNav screenProps={{ tabbarNavigation: navigation, ...screenProps }} onNavigationStateChange={null} />,
navigationOptions: {
tabBarLabel: 'Notifications',
tabBarIcon: ({ tintColor }) => (
<View style={[styles.tabViewBox]}>
<Text style={[styles.tabText, { color: tintColor }]}>ScreenThree</Text>
</View>
)
}
},
},
{
tabBarOptions: {
style: {
backgroundColor: white,
height: 55,
borderTopColor: 'transparent',
borderTopWidth: 1,
paddingRight: 10,
paddingLeft: 10,
borderTopWidth: 1,
borderTopColor: grayPlaceHolder
},
showLabel: false,
showIcon : true,
},
//Here Goes Your CustomTabBar Component
tabBarComponent : CustomTabBarComponent,
initialRouteName: 'ScreenTwo',
tabBarPosition: 'bottom',
animationEnabled: false,
swipeEnabled: false
}, []);
值传递给此方法。我该怎么做才能解决这个问题？
答案 0 :(得分：2)
为此类调用抛出的IllegalStateException意味着该方法返回null，并且您将返回值分配给非null类型的变量。它与varargs无关。