Download Hello Android OSLL

OSLL
Hello Android
Romanikhin Vasily
1
Table of content
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About Adroid;
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Android Architecture;
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Application Fundamentals
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Activity, Service, ContentProvider, BroadcastReceiver, Intent classes ●
Application Resources
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User Interface
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Software for developing
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Practice
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What is Android?
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Android Inc.
Open Handset
Alliance (OHA)
September 23,
2008
October 21, 2008
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Android Architecture
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The project structure
MyProject/
src/
MyActivity.java
res/
drawable/
icon.png
layout/
main.xml
values/
strings.xml
raw/
libs/
...
assets/
...
gen/
R.java
AndroidManifest.xml
✔
src/
✔
res/
✔
drawable/
✔
layout/
✔
values/
✔
gen/
✔
AndroidManifest.xml
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Application Fundamentals
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Application Components:
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Activities
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Services
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Broadcast receivers
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Content providers
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~ Intent
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~ Bundle
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Activity
http://developer.android.com/reference/android/app/Activity.html
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protected void onCreate(Bundle savedInstanceState);
protected void onStart();
protected void onRestart();
protected void onResume();
protected void onPause();
protected void onStop();
protected void onDestroy();
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Service
http://developer.android.com/reference/android/app/Service.html
startService(...)
● stopService(...)
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bindService(...)
● unbindService(...)
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Implementation Service
example
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BroadcastReceiver
http://developer.android.com/reference/android/content/BroadcastReceiver.ht
ml
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public void onReceive(Context context, Intent intent) {/* Actions … */}
Life cycle: if return from onReceive() ­ system kill it
Before using BR you must register it (dynamically – in code; or statically – in AndroidManifest.xml)
The most often used with Service
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ContentProvider
http://developer.android.com/reference/android/content/ContentProvider.html
The primary methods that need to be implemented are:
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onCreate() which is called to initialize the provider
query(Uri, String[], String, String[], String) which returns data to the caller
insert(Uri, ContentValues) which inserts new data into the content provider
update(Uri, ContentValues, String, String[]) which updates existing data in the content provider
delete(Uri, String, String[]) which deletes data from the content provider
getType(Uri) which returns the MIME type of data in the content provider
Why is it need?
● See also ContentResolver, SQLiteOpenHanhler,
Cursor, ManagedCursor.
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AndroidManifest.xml
http://developer.android.com/guide/topics/manifest/manifest-intro.html
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AndroidManifest.xml
<application>
<activity/>
<service/>
<receiver/>
<provider/>
</application>
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Application Resourses
res/
MyProject/
src/
MyActivity.java
res/
drawable/
icon.png
layout/
main.xml
values/
strings.xml
raw/
gen/
R.java
●
anim/
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color/
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drawable/
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layout/
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menu/
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values/
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xml/
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raw
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Application Resources
res/
drawable/
icon.png
background.png
drawable-hdpi/
icon.png
background.png
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Accessing Resources
/res/values/strings.xml
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User Interface
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Runtime (programmically)
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Xml layout file (ex: res/layout/main.xml)
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View
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View group
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Example layout file
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Required software
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JDK >= 1.5 ●
Android SDK (http://developer.android.com/sdk/index.html)
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Adding Platforms and Other Components
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Android NDK (http://developer.android.com/sdk/ndk/index.html)
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Ant >= 1.7

Eclipse (http://www.eclipse.org/downloads/)

ADT (http://developer.android.com/sdk/eclipse­adt.html)

http://osll.spb.ru/projects/geo2tag/wiki/_android_hello_
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Adding Platforms and Other
Components
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android­sdk<...>/tools/android (Linux or Mac)
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SDK Manager.exe (Windows)
Result:
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AVDs
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USB Drivers
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...
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Troubles
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Problems with jdk (not use open­jdk)
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ia32­libs (apt­get install ia32­libs)
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Developing on a Device
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USB Vendor IDs (for Linux or Mac) Device ???? ­ http://it­obzor.com/blog/aliev/pravilnaya­
nastroika­ubuntu­dlya­razrabotki­pod­android­ili­
reshaem­problemu­no­permissio
USB Driver (for Windows)
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Practice
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ExampleButton
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ExampleButtonExt
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ExStackActivity
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ExService
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ExBroadcastReceiver
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ExContentProvider
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What is remained...
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Storage data ●
Internal, External Storage
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DB
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SharedPreferences.
Designing for Performance http://developer.android.com/guide/practices/desi
gn/performance.html
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Questions... ???
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Thanks!
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