The specified child already has a parent. You must call removeView() on the child's parent first

Question

I create this post, because i am new at this, and i need a little help. I am doing a little exercise about a application you that put your name, and it returns \"hello (the

Answer 1

You dont need this line: setContentView(txtCambiado);

Answer 2

In my case i just pass the wrong view to the Method

Answer 3

I encountered this error whenever I omitted a parameter while inflating the view for a fragment in the onCreateView() method like so:

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view=inflater.inflate(R.layout.fragment_reject, container);
    return view;
}

The solution is to change the view inflation line to:

View view=inflater.inflate(R.layout.fragment_reject, container,false);

The explanation can be found at the Android guide for fragments

Quoting from the guide, the final parameter in the view initialization statement is false because:

"the system is already inserting the inflated layout into the container—passing true would create a redundant view group in the final layout"

Answer 4

Try this way,hope this will help you to solve your problem.

TextView textView = new TextView(this);
textView.setText("CustomTextView");
addContentView(textView,new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));

Answer 5

I’ve found a solution. I had to clear fragment’s parent from views before destroying and I’ve used the next peace of code for this:

in Java

public void onDestroyView() {
        if (rootView != null){
            ViewGroup viewGroup = (ViewGroup)rootView.getParent();
            if (viewGroup != null){
                viewGroup.removeAllViews();
            }
        }
        super.onDestroyView();
    }

in Kotlin

override fun onDestroyView() {
    if (rootView != null) {
        val viewGroup = rootView.parent as ViewGroup?
        viewGroup?.removeAllViews();
    }
    super.onDestroyView()
}

Answer 6

in ActivitySaludo, this line,

    setContentView(txtCambiado);

you must set the content view for the activity only once.