Android 如何使用来自其他 XML 文件的控件

Question

I'm using Android studio. I have activity_main.xml and MainActivity.java , secondactivity.xml and SecondActivity.java for it.

I have a button control in activity_main.java .

I want to use that button.click event from SecondActivity.java (not from MainActivity.java) .

How can I use control of XML files other than that's particular JAVA file. I'm trying,

  Button but = (Button)  FindViewById(R.Layout.activity_main)

In SecondActivity.java file but I got failed, where am I wrong. Please help.

Answer 1

see in FindViewById you pass layout. activity file and you cast in button object that is not possible you try to pass button id