Android Calculator app exercise (1)---interface

Android Studio 2.3.2. Reference article: http://blog.csdn.net/like_program/article/details/51813632

1. New Project Mycalculator, all the way next, the default values are used.

2. Modify the contents of the three XML files as required. Many local engineering names are different and changed to their own names.

3. Follow the steps to modify the Activity_main. XML file, encountered a problem:

Android:singleline= "false" obsolete

Temporary handling: Delete this line.

4. Follow the steps to add the code, and the calculator will work.

5. The comments written by the original author are very detailed, plan to read carefully and do it yourself again.

6. Do not add to the beautification section, leaving behind the content to learn. http://blog.csdn.net/like_program/article/details/51925765

Android Calculator app exercise (1)---interface