Using context of a fragment within its innerclass in Kotlin

Question

I have a fragment SelectFileFragment that has a innerclassTest. I need to use the context i.e. the activity that started the fragment SelectFileFragment in its innerclassTest.

I'm new to Kotlin so I want to know how I can get the context and then use in the inner class.

//there will be a few lines of code in java representing what i'm trying to achieve.

class FileSelectFragment : BaseFragment() {

public Context context;      //java


override fun onCreateView{
....
context = getActivity();   //java
....

}
class Test(){

private fun testMethod(){

context.getString(...);    //java

}

}

}

ianhanniballake · Accepted Answer · 2019-08-05 22:27:07Z

4

In Kotlin, a class must be explicitly declared inner class in order to use fields / methods from the outer class.

answered Aug 5, 2019 at 22:27

ianhanniballake

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5 Comments

Adeel Zafar Over a year ago

Alright. But how do I get context in the first place in Kotlin?

Adeel Zafar Over a year ago

And saving it in a variable.

ianhanniballake Over a year ago

context is already a property made available to you (Kotlin rewrites getContext() as context), so you don't need to save it as a variable or do anything. You'll probably want to use requireContext() though if you want a non-null Context instance.

Adeel Zafar Over a year ago

Now, I'm getting this error: Constructor of inner class can be called only with receiver of containing class

ianhanniballake Over a year ago

You can't create an inner class from outside of the outer class. That's true for both Kotlin and Java.

Eldhose M Babu · Accepted Answer · 2019-08-05 22:46:36Z

3

Adding this answer to make it clear for you. The answer is same as what @ianhanniballake posted above.

Please find the complete code snippet below : If you this this answers your question, please mark @ianhanniballake post as the answer.

class FileSelectFragment : BaseFragment() {

inner class Test(){

    private fun testMethod(){
        context.getString(R.string.app_name);    //java
    }
}

}

answered Aug 5, 2019 at 22:46

Eldhose M Babu

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