Android Development Tutorial. Human-Computer Interaction II (COMP 4020) Winter 2013

Transcription

1 Android Development Tutorial Human-Computer Interaction II (COMP 4020) Winter 2013

2 Mobile OS Symbian ios BlackBerry Window Phone Android.

3 World-Wide Smartphone Sales (Thousands of Units)

4 Android Phones Sony X10 HTC G1 Samsung i7500 HTC Hero Motorola Cliq HTC Magic Samsung Moment Motorola Droid HTC Tattoo

5 Features Linux OS kernel Java programming Open source libraries: SQLite, WebKit, OpenGL A simple and powerful SDK No licensing, distribution, or development fees Development over many platform Linux, Mac OS, windows Excellent documentation

6 Installation

7 Java Runtime Environment (JRE) Java Development Kit (JDK) Android Developer Tools Bundle (ADT Bundle) Eclipse + ADT plugin Android SDK Tools Android Platform-tools The latest Android platform The latest Android system image for the emulator

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14 Java Runtime Environment (JRE) Java Development Kit (JDK) Android Developer Tools Bundle (ADT Bundle) Eclipse + ADT plugin Android SDK Tools Android Platform-tools The latest Android platform The latest Android system image for the emulator

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18 The workspace is the physical location you are working in Your projects, source files, images and other artifacts can be stored in your workspace

19 Android SDK Manager

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21 Android Virtual Device Manager

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28 Enable USB Debugging on device Utilized to copy data between your device and computer. For Android 3.2 or below: Settings > Applications > Development > USB debugging For Others: Settings > Developer Options > USB debugging.

29 File -> New -> Android Application Project

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36 Folder Structure For Android Project Src Folder (Source folder) contains the java code of the application.

37 Folder Structure For Android Project res Folder (Resource folder): contains all the resources required like images, layouts and values.

38 Folder Structure For Android Project gen Folder: contains java files generated by ADT. These files have references to various resources placed in the application. It contains a special class R which contains all these references.

39 Common Layouts Image Source:

40 Layouts

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42 Create new resource ID named resid in the namespace of your application android:text= MyText" Further redirection to /res/values/strings.xml

43 Folder Structure For Android Project Manifest file:describe the application Declare app s name, version, icon, permission, etc Declare the application's components: activity, service,receiver or provider

44 Core Components Activity An activity is a user interface screen An application might consist of just one activity or several

45 Core Components Intent An Intent is an object that provides runtime binding between separate components (such as two activities). Activity Intent Activity A Context (global information about an application environment) as its first parameter The Class of the app component to which the system should deliver the Intent

46 Activity Example

47 Activity Example

48 Activity Example

49 Activity Example Inherit from the Activity Class Set the layout of the view as described in the activity_main.xml layout

50 Activity Example

51 Activity Example

52 Accelerometer Example An accelerometer is defined as an instrument for measuring the time rate of change of velocity with respect to magnitude or direction

53 Step 1-> Layout <LinearLayout xmlns:android=" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:paddingtop="20dip" android:text="shaker Demo" android:textsize="16sp" android:textstyle="bold" /> <TableLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingtop="10dip" android:stretchcolumns="*" > <TableRow> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="x-axis" android:textsize="14sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="y-axis" android:textsize="14sp" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" android:text="z-axis" android:textsize="14sp" /> </TableRow> <TableRow> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" /> </TableRow> </TableLayout> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:paddingtop="15dip" android:visibility="invisible" /> </LinearLayout>

54 Step 2 -> Java Main File

55 Step 2 -> Java Main File ActivityLifecycle

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57 Accelerometer Example

58 Question?