You may liken the various View objects as household items like furniture and appliances in a house. Every visible UI control occupies an area on your screen and provides the point of interaction between you and the app through events like clicking, touching, and keying. The View class is the base class of all graphical UI objects collectively called UI controls or Widgets like Button, TextView, EditText, CheckBox, RadioButton, ImageView, Spinner, and many more, that you see on your Android device's screen. I have set the scope of this article to cover the more common and more important UI layouts and UI controls as follows:Įvery Android's user interface is composed of a hierarchical collection of View and ViewGroup objects. Nowadays, a typical UI is graphical based, comprising UI controls like textbox, button, checkbox, radio button, datepicker, and many more, and is presented in a variety of layouts. Take out your Android phone, pick an app, and launch it, what comes into sight? The User Interface! The user interface or UI is the only thing and everything that the user can see and interact with your app. So, where shall we begin? The answer lies with your Android phone. In the subsequent tutorials that follow, we are going to scrutinize and explore the various building blocks that make up an Android app. You would have gained an overview of how an Android app is being built. You have got your hands dirty while Creating a Simple Hello World Android Project. Download app-release-apk.zip - 456.5 KB.
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