Android Basics

What is Android?

Android is a stack of software for mobile devices which has Operating System, middleware and some key applications. The application executes within its own process and its own instance of Dalvik Virtual Machine. Many Virtual Machines run efficiently by a DVM device. DVM executes Java language byte code which later transforms into .dex format files.

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What are the key components of Android Architecture?

Mainly Android Architecture have 4 key components: 

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What are the advantages of Android?

Multitasking – Yups, Android phones can run many applications, it means you can browse, Facebook while listened to the song. Ease of Notification – Any SMS, Email, or even the latest articles from an RSS Reader, there will always be a notification on the Home Screen Android phone, do not miss the LED indicator is […]

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What are the disadvantages of Android?

Given that Android is an open-source platform, and the fact that different Android operating systems have been released on different mobile devices, there’s no clear cut policy to how applications can adapt with various OS versions and upgrades.

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What is activity in Android?

An activity is a single, focused thing that the user can do.

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What are the exceptions in Android?

InflateException : This exception is thrown by an inflater on error conditions. Surface.OutOfResourceException: When a surface is not created or re-sized, this exception is thrown.

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What are the different methods of the Activity life cycle in Android?

Here are Seven main methods: 

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What dialog boxes are supported in android?

Android supports 4 dialog boxes: AlertDialog: An alert dialog box supports 0 to 3 buttons and a list of Selectable elements, including check boxes and radio buttons. Among the other dialog boxes, the most suggested dialog box is the alert dialog box.

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