Android Training Part 1

RGUIG Saad - AIMAF

Android

1lundi 21 janvier 13

Morning Program :

1.General Introduction

2.Environment Setup

3.HelloWorl Application

4.Android Application Anatomy

Android

2lundi 21 janvier 13

General Introduction : Android

3lundi 21 janvier 13

General Introduction : Android

Android has more than 48 percent of the smartphone market, versus 32 percent for iOS. Google indicates there are 850,000 Android device activations per day and total Google Play app downloads have reached more than 15 billion. App search firm Xyologic reports that in March 2012 there were 617 million app downloads on Android versus 393 million app downloads on iPhone in the U.S.

4lundi 21 janvier 13

General Introduction : Android

5lundi 21 janvier 13

General Introduction : Android

1.0 ASTRO

6lundi 21 janvier 13

General Introduction : Android

1.5 Cupcake

7lundi 21 janvier 13

General Introduction : Android

1.6 Donut

8lundi 21 janvier 13

General Introduction : Android

2.1 Eclair

9lundi 21 janvier 13

General Introduction : Android

2.2 Froyo

10lundi 21 janvier 13

General Introduction : Android

2.3 Gingerbread

11lundi 21 janvier 13

General Introduction : Android

3 Honycomb

12lundi 21 janvier 13

General Introduction : Android

2.4 Ice Cream Sandwich

13lundi 21 janvier 13

General Introduction : Android

4.1 Jellybean

14lundi 21 janvier 13

AndroidEnvironment Setup

Environment Setup Steps

15lundi 21 janvier 13

AndroidHello World Application

Create a new Application

16lundi 21 janvier 13

AndroidHello World Application

Eclipse Android Perspective

17lundi 21 janvier 13

AndroidHello World Application

Application Installation on device

18lundi 21 janvier 13

AndroidHello World Application

Test the App

Emulator Phone19lundi 21 janvier 13

AndroidHello World Application

Android project anatomy

src/ – Source folder contains all your Java source code

gen/ – Generated folder contains source code generated by Android/Eclipse.It contains R.java – one of Android’s most important file to perform name lookup/resolution and referencing.R.java is automatically generated by the build system and references your resources.

assets/ – Assets folder contains static files such as html which can be included in your program.

res/ – Resource folder contains your program resource files.

res/drawables/ – Contains image files eg. PNG, JPG etc but also drawables which are specified in XML format

res/layouts/ – Contains XML files to specify your application View layouts

res/values/ – Contains XML files where you can specify static string,text, numeric and other constant values.

libs/ – A folder containing third-party/downloaded JAR libraries which can be used in your Android App.

AndroidManifest.xml – A manifest file where you can specify all you Activities, Permissions, and other configurations.

20lundi 21 janvier 13

AndroidHello World Application

Android project anatomy<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="fr.aimaf" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="fr.aimaf.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application></manifest>

21lundi 21 janvier 13

AndroidHello World Application

Android project anatomy

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" >

<TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="@string/hello_world" />

</RelativeLayout>

22lundi 21 janvier 13

AndroidHello World Application

Android Activity Life cycle

23lundi 21 janvier 13

AndroidHello World Application

Android Activity Life cycle

Method Description

onCreate()

Called when the activity is first created. This is where you should do all of your normal static set up — create views, bind data to lists, and so on. This method is passed a Bundle object containing the activity's previous state, if that state was captured (see Saving Activity State, later).Always followed by onStart().

onReStart()Called after the activity has been stopped, just prior to it being started again.Always followed by onStart()

onStart()Called just before the activity becomes visible to the user.Followed by onResume() if the activity comes to the foreground, or onStop() if it becomes hidden.

24lundi 21 janvier 13

AndroidHello World Application

Android Activity Life cycle

onResume()Called just before the activity starts interacting with the user. At this point the activity is at the top of the activity stack, with user input going to it.Always followed by onPause().

onPause()

Called when the system is about to start resuming another activity. This method is typically used to commit unsaved changes to persistent data, stop animations and other things that may be consuming CPU, and so on. It should do whatever it does very quickly, because the next activity will not be resumed until it returns.Followed either by onResume() if the activity returns back to the front, or by onStop() if it becomes invisible to the user.

onStop()

Called when the system is about to start resuming another activity. This method is typically used to commit unsaved changes to persistent data, stop animations and other things that may be consuming CPU, and so on. It should do whatever it does very quickly, because the next activity will not be resumed until it returns.Followed either by onResume() if the activity returns back to the front, or by onStop() if it becomes invisible to the user.

onDestroy()Called before the activity is destroyed. This is the final call that the activity will receive. It could be called either because the activity is finishing (someone called finish() on it), or because the system is temporarily destroying this instance of the activity to save space. You can distinguish between these two scenarios with theisFinishing() method.

25lundi 21 janvier 13

AndroidHello World Application

Android Activity Life cycle

public class MainActivity extends Activity {

@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); }}

26lundi 21 janvier 13

Android

27lundi 21 janvier 13