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Android Tutorial- Androidology  Part 2 of 3 – Application Lifecycle This Android Tutorial has been taken from Developer Android, from its android video tutorials

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Android Tutorial-Androidology- Part 1 of 3- Architecture 1 of 3 – Architecture Overview

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This Android Tutorial has been taken from Developer.Android

Android Tutorial-Create a New Android Project

After you’ve created an AVD, the next step is to start a new Android project in Eclipse.

  1. From Eclipse, select File > New > Project.If the ADT Plugin for Eclipse has been successfully installed, the resulting dialog should have a folder labeled “Android” which should contain “Android Project”. (After you create one or more Android projects, an entry for “Android XML File” will also be available.)

Select “Android Project” and click Next.


Fill in the project details with the following values:

  • Project name: HelloAndroid
  • Application name: Hello, Android
  • Package name: com.example.helloandroid (or your own private namespace)
  • Create Activity: HelloAndroid
  • Min SDK Version: 2

Click Finish.

  1. Here is a description of each field:
    Project Name
    This is the Eclipse Project name — the name of the directory that will contain the project files.
    Application Name
    This is the human-readable title for your application — the name that will appear on the Android device.
    Package Name
    This is the package namespace (following the same rules as for packages in the Java programming language) that you want all your source code to reside under. This also sets the package name under which the stub Activity will be generated.Your package name must be unique across all packages installed on the Android system; for this reason, it’s very important to use a standard domain-style package for your applications. The example above uses the “com.example” namespace, which is a namespace reserved for example documentation — when you develop your own applications, you should use a namespace that’s appropriate to your organization or entity.

    Create Activity
    This is the name for the class stub that will be generated by the plugin. This will be a subclass of Android’sActivity class. An Activity is simply a class that can run and do work. It can create a UI if it chooses, but it doesn’t need to. As the checkbox suggests, this is optional, but an Activity is almost always used as the basis for an application.
    Min SDK Version
    This value specifies the minimum API Level required by your application. If the API Level entered here matches the API Level provided by one of the available targets, then that Build Target will be automatically selected (in this case, entering “2″ as the API Level will select the Android 1.1 target). With each new version of the Android system image and Android SDK, there have likely been additions or changes made to the APIs. When this occurs, a new API Level is assigned to the system image to regulate which applications are allowed to be run. If an application requires an API Level that is higher than the level supported by the device, then the application will not be installed.

    Other fields: The checkbox for “Use default location” allows you to change the location on disk where the project’s files will be generated and stored. “Build Target” is the platform target that your application will be compiled against (this should be selected automatically, based on your Min SDK Version).

    Notice that the “Build Target” you’ve selected uses the Android 1.1 platform. This means that your application will be compiled against the Android 1.1 platform library. If you recall, the AVD created above runs on the Android 1.5 platform. These don’t have to match; Android applications are forward-compatible, so an application built against the 1.1 platform library will run normally on the 1.5 platform. The reverse is not true.

Your Android project is now ready. It should be visible in the Package Explorer on the left. Open the HelloAndroid.javafile, located inside HelloAndroid > src > com.example.helloandroid). It should look like this:

package com.example.helloandroid;

import android.os.Bundle;

public class HelloAndroid extends Activity {
    /** Called when the activity is first created. */
    public void onCreate(Bundle savedInstanceState) {

Notice that the class is based on the Activity class. An Activity is a single application entity that is used to perform actions. An application may have many separate activities, but the user interacts with them one at a time. The onCreate()method will be called by the Android system when your Activity starts — it is where you should perform all initialization and UI setup. An activity is not required to have a user interface, but usually will.

Now let’s modify some code!

This Android Tutorial has been taken from Developer.Android and you can click the link to read the complete Android Tutorial

Android Tutorial-Android Apps can run in parallel

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This Android Tutorial is taken from developer Android

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Android Tutorial-Deploy your application on a real device

Turn on “USB Debugging” on your device in the settings. Select in the settings Applications > Development, then enable USB debugging. You also need to install the driver for your mobile phone. For details please see Developing on a Device . Please note that the Android version you are developing for must be the installed version on your phone.

To select your phone, select the “Run Configurations”, select “Manual” selection and select your device.

This Android Tutorial is taken from Vogella

Android Development Tutorial-Android Apps can easily embed the web

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This ANDROID TUTORIAL is taken from Android Developers

Portions of this page are reproduced from work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Android Development Tutorial-Android unit testing

Mon, 07/19/2010 – 06:51 | by gabor

SDK Version:


For unit testing you can use the built in JUnit framework just like in “standard” java applications.

A unit test is to test some low-level part – usually a single class – of a project, working individually.

The only trick is to extend AndroidTestCase in your test case instead of TestCase some Android specific methods, like getContext() which is often required by android functions.

Lets see a very simple example using eclipse:

- Create a new project to test, create a new class in it, with a simple method that , like this:

  1. public class ClassToTest{
  2. public int add(int arg1,int arg2){
  3. return arg1+arg2;
  4. }
  5. }

- Create a new test project: File/new/Other…/Android/Android Test Project
new Android Test Project

Add the previously created project as the test target, the other fields can be left as they are auto filled.

This Android Tutorial has been taken from Hello Android Tutorial

Many students are currently enrolled in the Android Tutorial from EDUmobile.

Join now and start you career as an Android developer

Android Tutorial -Application architecture

As mentioned, Android runs atop a Linux kernel. Android applications are written in the Java programming language, and they run within a virtual machine (VM). It’s important to note that the VM is not a JVM as you might expect, but is the Dalvik Virtual Machine, an open source technology. Each Android application runs within an instance of the Dalvik VM, which in turn resides within a Linux-kernel managed process, as shown below.

An Android application consists of one or more of the following classifications:

An application that has a visible UI is implemented with an activity. When a user selects an application from the home screen or application launcher, an activity is started.
A service should be used for any application that needs to persist for a long time, such as a network monitor or update-checking application.
Content providers
You can think of content providers as a database server. A content provider’s job is to manage access to persisted data, such as a SQLite database. If your application is very simple, you might not necessarily create a content provider. If you’re building a larger application, or one that makes data available to multiple activities or applications, a content provider is the means of accessing your data.
Broadcast receivers
An Android application may be launched to process a element of data or respond to an event, such as the receipt of a text message.

An Android application, along with a file called AndroidManifest.xml, is deployed to a device. AndroidManifest.xml contains the necessary configuration information to properly install it to the device. It includes the required class names and types of events the application is able to process, and the required permissions the application needs to run. For example, if an application requires access to the network — to download a file, for example — this permission must be explicitly stated in the manifest file. Many applications may have this specific permission enabled. Such declarative security helps reduce the likelihood that a rogue application can cause damage on your device.

The next section discusses the development environment required to build an

Android application.

This Android Tutorial has been taken from IBM Android Tutorial