如何引用 java 活动 class 的公共方法来自 Kotlin 同伴 ZA8CFDE6331BD59EB2AC96F9666

Question

I have a mix of Kotlin and Java code in my Android App. I need to refer to a public void method declared in an Activity having java code from a Kotlin companion object. I tried some ways including making the method static but of no use.

// java code
public class SampleActivity extends Activity{

     public void toggleMark(boolean canTic)
     { // some code }

}

//Kotlin code
class MyUtils {

    companion object {

         fun setTicPref(context: Context)
         {
             // some code 
             (context as SampleActivity).toggleMark(true) // cannot find declaration to go to

         }
    }

}

Answer 1

Make SampleActivity public.

change

class SampleActivity extends Activity{

     public void toggleMark(boolean canTic)
     { // some code }

}

to

public class SampleActivity extends Activity{

     public void toggleMark(boolean canTic)
     { // some code }

}