Intro to Android Programming

Introduction to Android Programming 0 to “Hello World” in 60 minutes or less Silicon Valley China Wireless Group Peter van der Linden [email_address] Android Technology Evangelist Developer Community Technical Services Motorola Mobility

Content ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],These slides are online at: http://www.slideshare.net account: pvdl01

Moore’s Law and Mobile Devices ,[object Object],[object Object],[object Object],[object Object],[object Object]

Smart Phone Family Tree PDA cell phone smart phone tablet netbook laptop Moore’s Law Moore’s law Actual Family Tree

My Phone has 802.11 b/g/n Wifi 1 GHz CPU Moore’s Law This is not a toy. This is equivalent to a Windows XP PC 512 MB RAM bluetooth DVD quality video player Music quality audio USB port

My Droid X Phone ALSO has accelerometer Digital compass Moore’s Law Today’s Windows PCs don’t have these … HD video capture Voice phone with noise-canceling hw 8 MP camera Orientation sensors GPS receiver

Smart Phone Family Tree smart phone laptop Moore’s Law A more insightful way to think of it! = + more hw

Implications of HW capabilities Moore’s Law ,[object Object],[object Object],[object Object],[object Object],[object Object]

2. Android Software Checklist ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The more of these you have, the easier your learning curve will be

2. Android Software Checklist ,[object Object],[object Object],That’s enough to get started!

The SDK tool chain 5. Java runtime SE ver 6 4. Eclipse 3.5 3. Eclipse ADT plug-in 2. Android SDK 1. Android Platform(s) Download 1,2,3, from developer.android.com 4 from Eclipse.org 5 from java.com

One stop shopping for Tools ,[object Object],[object Object],[object Object],[object Object],MOTODEV Studio

Compile time tools Java JRE Eclipse 3.5 Eclipse ADT plug-in Android SDK ,[object Object],[object Object],[object Object],[object Object]

Runtime Development Tools Eclipse 3.5 Android SDK Android Platform ,[object Object],[object Object],[object Object],[object Object],[object Object],Emu

3. Ingredients of an App ,[object Object],Java “ glue” XML, icons Media, data files, etc AndroidManifest.xml describes the app overall, features used, version, etc

[object Object],Ingredients of an App, II

[object Object],Ingredients of an App, III Java “ glue” code XML, icons, etc Manifest.xml

Ingredients of an App, IV ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

4. GUI Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Press You can have text in a TextView Another Button

4. GUI Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],public class MyActivity extends Activity implements OnClickListener { Button b= (Button) findViewById(R.id.pressme); b.setOnClickListener(this); . . . // Implement the OnClickListener callback public void onClick(View v) { // actions when the button is clicked }

GUI Basics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Getting into Code ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Getting into Code, XML 1 ,[object Object],[object Object],<?xml version= "1.0" encoding="utf-8"?> <LinearLayout … some attribute=“value” pairs … > <TextView … some attribute=“value” pairs … /> </LinearLayout>

Getting into Code, XML 2 ,[object Object],[object Object],<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent” > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello” /> </LinearLayout>

Getting into Code, XML 3 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Getting into Code, XML 3 ,[object Object]

Getting into Code, II ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Getting into Code, Activity 1 ,[object Object],[object Object],public class MainActivity extends android.app.Activity { /** Called when the activity is first created. */ public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // glue code! } }

Getting into Code, Activity 2 ,[object Object],[object Object],package com.motorola.hello2; import android.app.Activity; import android.os.Bundle; public class MainActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); } }

Getting into Code, Glue ,[object Object],[object Object],[object Object],[object Object],setContentView( R.layout.main ); // says “use layout in file res/layout/main.xml”

Getting into Code, Glue 2 The glue code is generated for you Makes XML names in res folder, visible in Java namespace! Create an ID name for an XML element with this attribute In Java, get hold of that XML-declared TextView by: In XML, get hold of that XML-declared TextView by: TextView tv = (TextView) findViewById( R.id.myTV ); <TextView android:id="@+id/myTV " <Button android:layout_below= ”@id/myTV "

Getting into Manifest ,[object Object],< ?xml version= "1.0" encoding="utf-8"?> <manifest xmlns:android= "http://schemas.android.com/apk/res/android" package= "com.motorola.hello2" android:versionCode= "1" android:versionName= "1.0"> <application android:icon= "@drawable/icon" android:label="@string/app_name"> <activity android:name= ".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> <uses-sdk android:minSdkVersion= "8" /> </manifest>

Running your code ,[object Object],[object Object],[object Object],[object Object]

Follow-up ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Q & A Where to find more information: http://developer.motorola.com One stop shopping, with links to many other useful places One stop Tools and SDK download Tools that work for all Android devices from all manufacturers.

Apache 2 license Copyright (c) 2007-2010 by the Android Open Source Project Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Intro to Android Programming

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