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android android-activity class findviewbyid

using findviewbyid in a class that does NOT extend Activity in android

I have a class that is currently extending Activity and I have methods like findViewById, ArrayAdapter etc.
I want to turn it into an independent class but all the above methods become undefined. What is the problem? Shouldn’t importing the classes be enough? For eg, I import android.view.View for findViewById but it still makes no difference.
Please advise.

you should pass the instance of your Activity to your Second Class on the constructor like this :

In your Activity Instanciate your Class like this :

MyClass instance = new MyClass(this);

And in your second Class , the constructor will be like this :

public class MyClass {
public Activity activity;
//.... other attributes
public MyClass( Activity _activity){
this.activity = _activity;
//other initializations...
}
}

and then when you want to use the findViewById() method , you can do like this :

EditText txt = (EditText)this.activity.findViewById(R.id.txt);