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Android Build a Self-Destructing Message Android App Using Fragments for Tabs Understanding the Rest of the Pieces

Posted by Sohale Vu
Sohale Vu
18,322 Points

Trouble with the Understanding the rest of the pieces code challenge

I have been trying to figure out where to place

mDeleteButton = (Button)findViewById(R.id.deleteButton);

to make the first part of the code challenge to work, but nothing seems to take it. I'm not sure what I am doing wrong. I believe that this code is correct.

4 Answers

Ernest Grzybowski
Ernest Grzybowski
Treehouse Project Reviewer

What error are you getting from the challenge engine?

If you are working with fragments, remember that you will have to call findViewById() from another view. It would look something like:

mDeleteButton = (Button) rootView.findViewById(R.id.deleteButton);

Edit: Make sure that you put your code that handles Views in onCreateView(). This is what you have to do for Fragments, unlike Activities.

Junior Tan
Junior Tan
1,893 Points

was rootView mentioned in the vid?

Timothy Boland
Timothy Boland
18,237 Points
Timothy Boland
Timothy Boland
18,237 Points

I think this code challenge is a little premature, because the video dosen't discuss how to use onCreateView yet

Sohale Vu
Sohale Vu
18,322 Points
Sohale Vu
Sohale Vu
18,322 Points

The error that I get when my put my code anywhere but inside of the onCreate method is Bummer! There is a compiler error. Please click on preview to view your syntax errors!

When I put my code inside the onCreate method I get

Bummer! Make sure you are setting the button in the correct lifecycle method for a Fragment!

Ernest Grzybowski
Ernest Grzybowski
Treehouse Project Reviewer

Edited my original answer.

Sohale Vu
Sohale Vu
18,322 Points
Sohale Vu
Sohale Vu
18,322 Points

Thank you for your help! So for fragments I need to set the buttons in the onCreateView()?

Ernest Grzybowski
Ernest Grzybowski
Treehouse Project Reviewer

Yep! Almost like how in Activities, you have to call setContentView() before you can start calling on UI elements.