Create Mobile Apps With Apphinge

Introduction

Over the Past Two Years, developers around the world have helped make Android Marker the go-to place for more than 100,000 apps, games and widgets Previously, you could only access Android Market directly from your device, but today we are introducing the Apping.in which is a web based Android & iOS Application builder website where you can Create your own Android Application according to your need. The website makes it easy to discover great new apps with a bigger, brighter interface. You can share apps with your friends through any Social Networking Website.

Features of Android Apps & iOS

List of Features in The Android & iOS operating system are :

·         Messaging

SMS and MMS are available forms of messaging, including threaded text messaging and Android Cloud To Device Messaging (C2DM) and now enhanced version of C2DM, Android Google Cloud Messaging (GCM) is also a part of Android Push Messaging service.

·         Web Browser

The web browser available in Android is based on the open-source Blink (previously WebKit) layout engine, coupled with Chrome's V8 JavaScript engine. The browser scores 100/100 on the Acid3 test on Android 4.0.

·         Mutli-Touch

Android has native support for multi-touch which was initially made available in handsets such as the HTC Hero. The feature was originally disabled at the kernel level. Google has since released an update for the Nexus One and the Motorola Droid which enables multi-touch natively

·         Multitasking

Multitasking of applications, with unique handling of memory allocation, is available

·         Video Calling

Video calling through Google Talk is available in Android 2.3.4

·         Multiple language support

Android supports multiple languages

·         Connectivity

Android supports connectivity technologies including GSM/EDGE, Wi-Fi, Bluetooth, LTE, CDMA, EV-DO, UMTS, NFC, IDEN and WiMAX.

·         Bluetooth

Supports voice dialing and sending contacts between phones, sending files (OPP), accessing the phone book (PBAP), A2DP and AVRCP. Keyboard, mouse and joystick (HID) support is available in Android 3.1+, and in earlier versions through manufacturer customizations and third-party applications.

Working of Android Apps

Android apps are written in the Java programming language. The Android SDK tools compile your code—along with any data and resource files—into an APK: an Android package, which is an archive file with an .apk suffix. One APK file contains all the contents of an Android app and is the file that Android-powered devices use to install the app.

 Once installed on a device, each Android app lives in its own security sandbox:

• The Android operating system is a multi-user Linux system in which each app is a different user.
•   By default, the system assigns each app a unique Linux user ID (the ID is used only by the system and is unknown to the app). The system sets permissions for all the files in an app so that only the user ID assigned to that app can access them
• Each process has its own virtual machine (VM), so an app's code runs in isolation from other apps.
• By default, every app runs in its own Linux process. Android starts the process when any of the app's components need to be executed, then shuts down the process when it's no longer needed or when the system must recover memory for other apps.

       

           Example of Android Apps

Android Hello World Example

      Let us proceed to write a simple Android Application which will print "Hello World!"

      The first step is to create a simple Android Application using Eclipse IDE. Follow the option File -> New -> Project and finally select Android New Application wizard from the wizard list. Now name your application as HelloWorld using the wizard window as follows:

      Next, follow the instructions provided and keep all other entries as default till the final step. Once your project is created successfully, you will have following project screen:

      The main activity code is a Java file MainActivity.java. This is the actual application file which ultimately gets converted to a Dalvik executable and runs your application. Following is the default code generated by the application wizard for Hello World! application:

      Let's try to run our Hello World! application we just created. I assume you had created your AVD while doing environment setup. To run the app from Eclipse, open one of your project's activity files and click Run Eclipse Run Icon icon from the toolbar. Eclipse installs the app on your AVD and starts it and if everything is fine with your setup and application, it will display following Emulator window: