Question

setOnPlaceSelectedListener以接口作为参数。在Java中，可以通过覆盖开始时的所有方法来创建该接口的实例。如何在Kotlin中做到这一点？

autocompleteFragment.setOnPlaceSelectedListener(new PlaceSelectionListener() {
    @Override
    public void onPlaceSelected(Place place) {
        txtView.setText(place.getName()+","+place.getId());
        Log.i(TAG, "Place: " + place.getName() + ", " + place.getId());
    }

    @Override
    public void onError(Status status) {
        // TODO: Handle the error.
        Log.i(TAG, "An error occurred: " + status);
    }
});

Answer 1

当您找到正式文档（https://kotlinlang.org/docs/reference/object-declarations.html）时，可以创建一个对象声明：

window.addMouseListener(object : MouseAdapter() {
    override fun mouseClicked(e: MouseEvent) { ... }

    override fun mouseEntered(e: MouseEvent) { ... }
})

如何在Kotlin中实例化接口？

1 个答案: