Android calculator Layout

Introduction:

After learning several android layout methods, we made an android calculator.

I searched the internet for this information and found that there was a problem with the layout, not full of the screen, but only accounted for a part.

The instructor's suggestion is: Setting the font size is the key. However, after I fixed the font size problem and solved the screen problem, I found that the font was not centered. On the left side of the horizontal line. The attribute used later has not changed. But later I found that this attribute does not appear to be used, and a Layout is used for nesting to solve this problem.

The implementation result is as follows:

 

 

 

 

 

 

 

 

 

 

The xml file code in LayOut is as follows:

View Code

25sp45dp

Note: If the whole screen is not fully covered during copying, change

The two parameters to be added to the dimens file.

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