1. Android application
development basics
Anton Narusberg

2. Hello, I’m Anton.
• Developer since 2006
• Android developer since 2010
• Partner at Cannedapps

3. Topics
• Getting up and running with Android SDK
• "Hello World!"
• Deeper dive into Android application
components

4. Android SDK

5. • Speed, Power, Control
• Standardized user experience
• Ability to be on the edge
• Integration

6. Getting started
• Java Development Kit (JDK)
• IDE (Eclipse recommended)
• Android SDK
• Android Development Tools (ADT)

7. ADT plugin for Eclipse
• SDK Tools Integration
• Code Editors
• Layout Refactoring Support
• Android Virtual Devices Manager
• DDMS
• ...
more at http://developer.android.com/guide/developing/tools/adt.html

8. “Hello eSport!”

9. Android application
components
• Activity
• Layouts & Views
• Service
• Intent
• AndroidManifest.xml

10. Activity

11. Activity
UI concept that represents a single screen on your app

12. Activity
UI concept that represents a single screen on your app
DashboardActivity TrainingActivity

13. Activity lifecycle

14. DashboardActivity
public class DashboardActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.dashboard);
preferences = PreferenceManager.getDefaultSharedPreferences(this);
initViews();
initShadows();
attachEvents();
}
@Override
protected void onResume() {
shadower.turnOn();
super.onResume();
}
@Override
protected void onPause() {
shadower.turnOff();
super.onPause();
}
....
}

15. Dashboard layout

16. Dashboard layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/background_gradient">
<ImageView
android:layout_width="40dp"
android:layout_height="36dp"
android:layout_marginTop="18dp"
android:layout_marginLeft="15dp"
android:background="@drawable/logo_run"/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="170dp"
android:layout_alignParentBottom="true">
<ImageView
android:id="@+id/dashboard_history_button_shadow"
android:layout_width="100dp"
android:layout_height="97dp"
android:layout_marginLeft="110dp"
android:background="@drawable/menu_history_shadow"/>
<Button
android:id="@+id/dashboard_history_button"
android:layout_width="100dp"
android:layout_height="97dp"
android:layout_marginLeft="110dp"
android:background="@drawable/menu_history"/>
.......
</RelativeLayout>
</RelativeLayout>

17. Service
Background process that can run for a long time

18. Service
Background process that can run for a long time

19. Binding the Service from Activity
public class TrainingActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate();
Intent intent = new Intent(this, RunningSessionService.class);
bindService(intent, sessionConnection, BIND_AUTO_CREATE);
}
@Override
protected void onDestroy() {
unbindService(sessionConnection);
super.onDestroy();
}
private ServiceConnection sessionConnection = new ServiceConnection() {
public void onServiceDisconnected(ComponentName name) {}
public void onServiceConnected(ComponentName name, IBinder serviceBinding) {
RunningSessionService.SessionBinder binding = (RunningSessionService.SessionBinder) serviceBinding;
session = binding.getService();
}
};
public void onStartTrackingClicked() {
if (session != null) {
session.startTracking();
}
}
}

20. Binding the Service from Activity
public class RunningSessionService extends Service {
@Override
public void onCreate() {
super.onCreate();
init();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {}
@Override
public void onDestroy() {}
@Override
public IBinder onBind(Intent intent) {
binding = new SessionBinder(this);
return binding;
}
@Override
public boolean onUnbind(Intent intent) {
stopSelf();
return super.onUnbind(intent);
}
public void startTracking() {
...
}
public void stopTracking() {
...
}
}

21. Intent
• An "intention" to do some work:
• Broadcast a message
• Start a Service
• Launch an Activity
• Display a web page or a list of contacts
• dial a phone nr. or answer a call
• etc.

22. Launching next Activity with an Intent
DashboardActivity TrainingActivity

23. Intent
public class DashboardActivity extends Activity {
private void initViews() {
runButton = (Button) findViewById(R.id.dashboard_run_button);
historyButton = (Button) findViewById(R.id.dashboard_history_button);
}
private void attachEvents() {
runButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(DashboardActivity.this, SelectTrackActivity.class);
startActivity(intent);
}
});
...
}
...
}

24. AndroidManifest.xml

25. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cannedapps.runner"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="3"/>
<application
android:name="Runner"
android:label="@string/app_name"
android:icon="@drawable/ic_launcher_run"
android:theme="@android:style/Theme.NoTitleBar">
<activity
android:name="DashboardActivity"
android:label="@string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SettingsActivity"/>
<activity
android:name="TracksActivity"
android:screenOrientation="portrait"/>
...
<service android:enabled="true" android:name=".tracking.RunningSessionService"/>
</application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
</manifest>

26. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.cannedapps.runner"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="3"/>
<application
android:name="Runner"
android:label="@string/app_name" Describe Activities & Services
android:icon="@drawable/ic_launcher_run"
android:theme="@android:style/Theme.NoTitleBar">
<activity
android:name="DashboardActivity"
android:label="@string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SettingsActivity"/>
<activity
android:name="TracksActivity"
android:screenOrientation="portrait"/>
...
<service android:enabled="true" android:name=".tracking.RunningSessionService"/>
</application>
Describe Permissions
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
</manifest>

27. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" General setup
package="com.cannedapps.runner"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="3"/>
<application
android:name="Runner"
android:label="@string/app_name" Describe Activities & Services
android:icon="@drawable/ic_launcher_run"
android:theme="@android:style/Theme.NoTitleBar">
<activity
android:name="DashboardActivity"
android:label="@string/app_name"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SettingsActivity"/>
<activity
android:name="TracksActivity"
android:screenOrientation="portrait"/>
...
<service android:enabled="true" android:name=".tracking.RunningSessionService"/>
</application>
Describe Permissions
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
</manifest>

28. Publishing to the Market
1. Sign up at https://market.android.com/publish
- 25$ fee
2. Prepare your application Package
- Test it
- Build it
- Sign it
3. Upload promotional material
4. Publish

29. Questions?
Anton Narusberg
anton@cannedapps.com
@antonnarusberg

30. Resources
Android resources
http://developer.android.com
Android Developers Google group
http://groups.google.com/group/android-developers
Online Tutorials
http://anddev.org

31. Community
Tallinn Android Developers
http://www.meetup.com/Tallinn-Android-Developers/