Brief Information

• Name : Operating System 운영체제
• Lecturer : Ahn Woohyun 안우현
• Semester : 2016 Fall
• Major?: BE,?Computer Science and Engineering
• Textbook
  • 박성근 (2014)『이것이 안드로이드다』한빛미디어
  • 김상형 (2016)『안드로이드 프로그래밍 정복 1』한빛미디어
  • 김상형 (2016)『안드로이드 프로그래밍 정복 2』한빛미디어
• Syllabus : Syllabus_2016-5-2__Embedded Operating System.pdf
• In?short
  • Programming Android programs
• Review the Tests
  • Midterm:
    • Know the code routine for a certain function.
    • Know definitions and lists.
    • Coding experience would help me exclusive to others. Most difficult are the problems that require us to fill in blanks in some source codes.

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Assignments

Assignment 1

• Title: Display like the given layout
• Duration: 2016-09-07~11 (4 days)
• Key words: layout XML files, LinearLayout, RelavtiveLayout, TextView, EditText, Button
• Demonstration video
• Project files

Assignment 2

• Title: Implementing a calculator
• Duration: 2016-09-21~28 (7 days)
• Keywords: TableLayout, Button, RadioButton
• Demonstration video
• Project files

Assignment 3

• Title: Implicit intent with WebView, TextView, and a hyperlink
• Duration: 2016-10-12~26 (14 days)
• Key words:?Intent, implicit intent, WebView
• Demonstration video
• Project files

Assignment 4

• Title: Display the air quality in Seoul depending on the input date and place
• Duration: 2016-10-28~11-13 (16 days)
• Key words: Intent, XML parsing, DOM parser, working thread
• Demonstration video
• Project files

Assignment 5

• Title: Music Player
• Duration: 2016-?-?~12-21
• Key words
• Demonstration video
• Project files

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How to Study

• Know how to use classes.
• Know terms in Android.
• Remember example implementations.

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Summary

4 Components in Android

1. Activities
2. Broadcast receivers
3. Content providers
4. Services

Chapter 4. The Concept of Views and View Groups

Chapter 5. View Groups

Types of View Groups

• LinearLayout
• RelativeLayout
• FrameLayout
• TableLayout

Chapter 6. Views

Types of Views

• TextView
• EditText
• Button
• ImageView

Chapter 8. Events

Types of Events

• TouchEvent
• KeyEvent

Focus

Chapter 10. Execution of an Activity and Intent

Chapter 11. Activity Lifecycle

Chapter 13.?Data Communication Using Intent

Chapter 14-1. Processes and Threads

Chapter 14-2. Looper, MessageQueue, and Handler

Chapter 14-3.?AsyncTask, CountDownTimer, Timer, and HandlerThread

AsyncTask

• doInBackground() is executed by a?working thread. The rest of methods are executed by the UI thread.
• doInBackground() should always be implemented.

Steps to Implement AsyncTask

1. Make an Activity.
2. In the Activity, public

Chapter 15. BroadcastReceiver and BroadcastListener

• Classes
  • BroadcastReceiver
    • onReceive(Context, Intent)
  • Activity
    • sendBroadcast(Intent)
    • registerReceiver(BroadcastReceiver, IntentFilter)
    • unregisterReceiver(BroadcastReceiver)
• Concepts
  • broadcast & receive
  • static broadcast receivers & dynamic broadcast receivers

Broadcasting Activities

Static Broadcast Receivers

• Register a broadcast receiver before the compile time.
• AndroidManifest.xml>>application tag>> Add receiver tag
  
  XHTML

  <application>... <receiver android:name=".BroadcastSideReceiver"> <intent-filter android:priority="0"> <action android:name="com.superdroid.test.Broadcasting.action.FILE_DOWNLOAD"> </intent-filter> </receiver> </application>

  1 2 3 4 5 6 7

  <application>...   <receiver android:name=".BroadcastSideReceiver">     <intent-filter android:priority="0">       <action android:name="com.superdroid.test.Broadcasting.action.FILE_DOWNLOAD">     </intent-filter>   </receiver> </application>

Dynamic Broadcast Receivers

• Register a broadcast receiver in the running time.
• Register a broadcast receiver.
  
  src/BroadcastingActivity.java

  Java

  public class BroadcastingActivity extends Activity { BroadcastReceiver broadcastReceiver = null; protected void onCreate(Bundle savedInstanceState) { ... IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction("com.superdroid.test.Broadcasting.action.FILE_DOWNLOADED"); intentFilter.setPriority(0); // Higher, earlier. broadcastReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String fileName = intent.getStringExtra("FILE_NAME"); } registerReceiver(broadcastReceiver, intentFilter); } } }

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

  public class BroadcastingActivity extends Activity {   BroadcastReceiver broadcastReceiver = null;   protected void onCreate(Bundle savedInstanceState)  {     ...     IntentFilter intentFilter = new IntentFilter();     intentFilter.addAction("com.superdroid.test.Broadcasting.action.FILE_DOWNLOADED");     intentFilter.setPriority(0); // Higher, earlier.     broadcastReceiver = new BroadcastReceiver() {       public void onReceive(Context context, Intent intent) {         String fileName = intent.getStringExtra("FILE_NAME");       }       registerReceiver(broadcastReceiver, intentFilter);     }   } }

• Unregister the broadcast receiver.
  
  src/BroadcastingActivity.java

  public class BroadcastingActivity extends Activity { BroadcastReceiver broadcastReceiver = null; ... protected void onDestroy() { unregisterReceiver(broadcastReceiver); super.onDestroy(); } ... }

  1 2 3 4 5 6 7 8 9

  public class BroadcastingActivity extends Activity {   BroadcastReceiver broadcastReceiver = null;   ...   protected void onDestroy() {     unregisterReceiver(broadcastReceiver);     super.onDestroy();   }   ... }

  
   

FLAG_EXCLUDE_STOPPED_PACKAGES Intent Filter

• FLAG_EXCLUDE_STOPPED_PACKAGES
  • The default state
  • If set, this intent will not match any components in packages that are currently stopped.
• FLAG_INCLUDE_STOPPED_PACKAGES
  • If set, this intent will always match any components in packages that are currently stopped.
  • Java

    Intent intent = new Intent(); intent.setAction(...); intent.putExtra(...); intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES); sentBroadcast(intent);

    1 2 3 4 5

    Intent intent = new Intent(); intent.setAction(...); intent.putExtra(...); intent.addFlags(Intent.FLAG_INCLUDE_STOPPED_PACKAGES); sentBroadcast(intent);

    
     

Chapter 18. Services

• There are two modes of services: started services and bound services.
• Started services
  • start/end a service
  • Other components can start a started service.
  • Other components can end a started service.
• Bound services
  • between the start and end of a service
  • If a service is on running, a bound service can return the requested result.
  • connection
• Since Service is one of the 4 components, after a Service is made, the Service should be added in <application> tag in AndroidManifest.xml.

Chapter 16. Files and Databases

 

Chapter 17. Content Providers

 

Chapter 20. Advanced View Groups

ScrollView

• 뷰마다 배치가 다양한 레이아웃을 스크롤하고 싶다면 스크롤뷰를 사용한다.
• 스크롤 전에 보이지 않을 자식뷰까지 미리 그려두기 때문에 자식 뷰가 많을수록 메모리 사용량이 증가.

AdapterView

• 동일한 구조의 레이아웃들이 수직으로 그룹을 구성한 리스트의 구조.
• 현재 화면에 보이지 않는 자식 뷰를 미리 생성하지 않고 스크롤되어 보여야할 때 비로소 생성된다. 메모리 사용량 감소.

Chapter 9. Resources