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Android Build a Simple Android App (2014) Creating the Screen Layout Editing a Layout File

Android ID

When I try to run or save the project from this point, I get an error:


under the second tag. I didn't add or change this line. What does it mean?

1 Answer

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Let's say in a layout file you have several TextViews. You want to be able to distinguish between them. You do so by giving each one a unique ID. That is the format for giving the ID.

You just have to fill in the name you want for the TextView like so:


You can get an error if you leave it blank like you have above.