How to open a kotlin fragment from java Activity?

Question

我在 java 中有一个活动MainActivity ，在 Kotlin 中有一个片段FirstFragment ，在MainActivity编写代码来打开FirstFragment 。

getSupportFragmentManager().beginTransaction().replace(R.id.my_container, new FirstFragment()).commit();

Answer 1

You can call kotlin and java from each other, you just import the class and call it. Does not matter if it is kotlin or not.