What is Android App Development?
Android devices typically include a set of sensors that can be accessed through Android applications. For example, the GPS built into many smartphones is a sensor. As a result, you can access the GPS from within your Android applications. Here, in this blog, we will discuss about android development basics and to learn more about basics of android, join Android Training in Chennai.
Apps and APK Files:
An Android app is simply an Android app. An APK file contains an app (Android application package). The APK file contains the compiled Java code as well as other resources for the Android application, such as text and images.
An Android activity is a graphical user interface component. It is analogous to a window in a desktop application. Because mobile phone screens are so small, an activity usually takes up the entire screen. When you open multiple activities, they stack on top of one another. You cannot arrange activities side by side as you can on a desktop.
These two screenshots depict an Android app that displays a list of websites. If you click on any of the websites in the list, it will launch a new activity that will take up the entire screen. If you use your Android device’s “back” button, you will be taken back to the first activity with the list of websites.
A fragment in Android is a piece of a larger user interface. A fragment typically occupies only a portion of the screen. Inside activities, fragments are used. Fragments can be reused for a variety of activities.
Views and ViewGroups are commonly found within Fragments.
Views and ViewGroups:
Android GUI elements are classified into three types: Activities, Views, and ViewGroups. The screens/windows are the activities. Views are individual GUI elements such as a TextView that displays text, a Button that users can click on, and so on. ViewGroups are View containers. A ViewGroup is a container for a collection of Views.
Views and ViewGroups may be nested within an activity or a fragment (which is again nested inside an activity).
Layout XML Files:
XML files can be used to define the layout and contents of activities, fragments, and some ViewGroups. The layout XML files define which GUI components an activity or fragment contains, as well as how the GUI components are styled (size, margins, padding, etc.).
Android operating system to notify it that another action or activity is required. When a user chooses to share a photo, a photo app, for example, may send an intent to the operating system. The “sharing action” is described by the intent. Other applications that understand how to perform the “sharing action” can then be launched, and the sharing can be done through another application.
Android widgets are graphical user interface components that can be displayed outside of an activity. On many Android home screens, for example, a weather widget displaying today’s weather is displayed. Widgets are created and distributed as part of an Android application.
Views in Android are also known as “widgets” at times. Many of the GUI components (View subclasses, for example) are found in a Java package called Android. Widget. However, GUI components are not the same as a widget that can be found on an Android device’s home screen. So, when reading about Android, make a distinction between GUI components that can be used inside ViewGroups, Fragments, and Activities (and also inside Widgets) and Widgets that can live on the Android device’s home screen.
Android services are background processes that can run on an Android device even when no apps are visible. A user interface is not required for services. For example, a service could check a remote server for updates, backup data every hour, and so on.
Android devices typically include a set of sensors that can be accessed through Android applications. For example, the GPS built into many smartphones is a sensor. As a result, you can access the GPS from within your Android applications.
As discussed above the android basics for beginners and the basics of android studio, you will understand the importance of an Android Platform. So if you want to know how to be a successful Android Developer, you can join FITA Academy’s Android Training in Coimbatore and impart yourself with the Android development strategies, techniques, and tools.