Simple Android app crashes when calling Button Method

 

Simple Android app crashes when calling Button Method

When you try to use the button method and test it on the android emulator, it always crashes. If you don't call any methods its work first, but you need to edit it when you program. A simple example is test1, if you comment out test1.getHeight() it works fine, but when you use it, it crashes. Ultimately, You want to be able to edit the height/width.

Solution :

You may be calling getHeight too early.

Button is populated after the View is rendered, and your Button is called before View is rendered.

Try move your call, getHeight around in different methods, other than onCreate.