Just trying to give an answer
1) since @Last Warrior said deleting a field
2) You determined the text size in 13sp, and I think that there is no place for 13sp due to the layout under the button
3) you had to specify an attribute of a fixed size or weight for the layout containing the button and the entire top XML layout, so that the space ends on the button and the text is cut off.
4) try specifying the size of wrap_content or fill_parent, and if you used weight, you will see that your size in dp / sp does not go beyond the weight limits.
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