Android User Interface Development for beginners
The strength of Android is to have models of devices for all needs: small screen's phones, big screen's phone, tablets,PDA,Smart TV etc. This is an advantage for users but a problem for android application developers. The problem with the screen size is a burden for web developers, and Android apps developers will not escape the rule. To define our user interfaces we need to use layouts that make up the base class for containers of visual elements. They contain other views (buttons, lists, checkboxes, etc.) or other layouts. Interfaces are defined using XML files. This format allows to have a graphical interface editor and to have a real separation between your Java (behavior) code and your interface. Everything that is done in XML could also be done in Java, though the code would be much more complex to maintain. The layout XML file All XML layout files must be placed in the /res/layout directory of your Android project in order for the Android packa