* what i made * point 1 - same space with margin, weight ratio 2 - have toast pop up message when the button is clicked (using onclick and user defined methods) 3 - color, string enrolling 1. constraint >> linear (google prefers constraint layout) 2. enroll the color resource folder >>> values >>> colors.xml 3. enroll the string res > values > strings.xml the real value MyCalculator_chapter7 233..

1. how to inherit the parent's width and height from the parent layout to chlid button? there are a lot of buttons inside of the linear layout, and i want to fit the button size to layout 2. how to align the items inside of linear layout android : align? want to align the buttons at the. center with same space. Q3. how to designate the ratio of each button? ex. number 0 button should be two time..