Understanding User Interface in Android - Part 1: Layouts So far in my previous few articles on Android I have focused on showing you how to get things done in Android without really spending too much time discussing the visual aspect of Android application development - User Interface design. In this article, and the next, I will walk you through the various elements that make up the UI of an Android application. In this first part of the article, I will discuss the various layouts available in Android to position the various widgets on your screen. Android Screen UI Components
Android Preferences For almost any application we need to provide some settings in order to enable users have some level of control over how the application works. Android has provided a standard mechanism to show, save and manipulate user's preferences. PreferenceActivity class is the standard Android Activity to show Preferences page, it contains a bunch of Preference class instances which use SharedPreferenceclass to save and manipulate corresponding data.There are different types of Preferences Available in Preference package, and if you need something more you can extend Preference class and create your own Preference type. in this article we will go through predefined Preference types in Android and I'm also going to implement a custom Preference type to see how that works.Our Preferences page is gonna look like this :
The Developer's Guide Android provides a rich application framework that allows you to build innovative apps and games for mobile devices in a Java language environment. The documents listed in the left navigation provide details about how to build apps using Android's various APIs. If you're new to Android development, it's important that you understand the following fundamental concepts about the Android app framework: Apps provide multiple entry points Android apps are built as a combination of distinct components that can be invoked individually.
1.1. The Android operating system Android is an operating system based on the Linux kernel.