[英]How to override method when instantiating object in Kotlin?
In Java, to override method when instantiating new object we can do this 在Java中,要在实例化新对象时覆盖方法,我们可以这样做
public ActivityTestRule<MainActivity> rule = new ActivityTestRule<MainActivity>(
MainActivity.class) {
@Override
protected void beforeActivityLaunched() {
// implement code
super.beforeActivityLaunched();
}
};
How to do that in Kotlin? 如何在Kotlin中做到这一点? I tried this code but it failed to compile. 我尝试了此代码,但无法编译。
@Rule @JvmField
var rule = ActivityTestRule<MainActivity>(MainActivity::class.java) {
override fun beforeActivityLaunched() {
super.beforeActivityLaunched()
}
}
If you want to create anonymous inner class, you should use object
. 如果要创建匿名内部类,则应使用object
。
var rule = object : ActivityTestRule<MainActivity>(MainActivity::class.java) {
override fun beforeActivityLaunched() {
super.beforeActivityLaunched()
}
}
See also Object Expressions and Declarations . 另请参见对象表达式和声明 。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.