Difference between revisions of "ANDROID: Komponen Aplikasi"

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(Created page with "Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml t...")
 
Line 3: Line 3:
 
There are following four main components that can be used within an Android application −
 
There are following four main components that can be used within an Android application −
  
Sr.No Components & Description
+
Sr.No Components & Description
1
+
    1 Activities           They dictate the UI and handle the user interaction to the smart phone screen.
Activities
+
    2 Services             They handle background processing associated with an application.
 
+
    3 Broadcast Receivers They handle communication between Android OS and applications.
They dictate the UI and handle the user interaction to the smart phone screen.
+
    4 Content Providers   They handle data and database management issues.
 
 
2
 
Services
 
 
 
They handle background processing associated with an application.
 
 
 
3
 
Broadcast Receivers
 
 
 
They handle communication between Android OS and applications.
 
 
 
4
 
Content Providers
 
 
 
They handle data and database management issues.
 
  
 
Activities
 
Activities
Line 29: Line 14:
 
An activity is implemented as a subclass of Activity class as follows −
 
An activity is implemented as a subclass of Activity class as follows −
  
public class MainActivity extends Activity {
+
public class MainActivity extends Activity {
}
+
}
 +
 
 
Services
 
Services
 
A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.
 
A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.
Line 36: Line 22:
 
A service is implemented as a subclass of Service class as follows −
 
A service is implemented as a subclass of Service class as follows −
  
public class MyService extends Service {
+
public class MyService extends Service {
}
+
}
 +
 
 
Broadcast Receivers
 
Broadcast Receivers
 
Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.
 
Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.
Line 43: Line 30:
 
A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.
 
A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.
  
public class MyReceiver  extends  BroadcastReceiver {
+
public class MyReceiver  extends  BroadcastReceiver {
  public void onReceive(context,intent){}
+
    public void onReceive(context,intent){}
}
+
}
 +
 
 
Content Providers
 
Content Providers
 
A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.
 
A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.
Line 51: Line 39:
 
A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.
 
A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.
  
public class MyContentProvider extends  ContentProvider {
+
public class MyContentProvider extends  ContentProvider {
  public void onCreate(){}
+
    public void onCreate(){}
}
+
}
 +
 
 
We will go through these tags in detail while covering application components in individual chapters.
 
We will go through these tags in detail while covering application components in individual chapters.
  
Line 60: Line 49:
  
 
S.No Components & Description
 
S.No Components & Description
1
+
  1 Fragments    Represents a portion of user interface in an Activity.
Fragments
+
  2 Views        UI elements that are drawn on-screen including buttons, lists forms etc.
 +
  3 Layouts      View hierarchies that control screen format and appearance of the views.
 +
  4 Intents      Messages wiring components together.
 +
  5 Resources    External elements, such as strings, constants and drawable pictures.
 +
  6 Manifest    Configuration file for the application.
  
Represents a portion of user interface in an Activity.
 
 
2
 
Views
 
 
UI elements that are drawn on-screen including buttons, lists forms etc.
 
 
3
 
Layouts
 
 
View hierarchies that control screen format and appearance of the views.
 
 
4
 
Intents
 
 
Messages wiring components together.
 
 
5
 
Resources
 
 
External elements, such as strings, constants and drawable pictures.
 
 
6
 
Manifest
 
 
Configuration file for the application.
 
 
Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact.
 
Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact.
  
Line 94: Line 61:
  
 
Sr.No Components & Description
 
Sr.No Components & Description
1
+
  1 Activities           They dictate the UI and handle the user interaction to the smart phone screen.
Activities
+
  2 Services             They handle background processing associated with an application.
 
+
  3 Broadcast Receivers They handle communication between Android OS and applications.
They dictate the UI and handle the user interaction to the smart phone screen.
+
  4 Content Providers   They handle data and database management issues.
 
 
2
 
Services
 
 
 
They handle background processing associated with an application.
 
 
 
3
 
Broadcast Receivers
 
 
 
They handle communication between Android OS and applications.
 
 
 
4
 
Content Providers
 
 
 
They handle data and database management issues.
 
  
 
Activities
 
Activities
Line 119: Line 71:
 
An activity is implemented as a subclass of Activity class as follows −
 
An activity is implemented as a subclass of Activity class as follows −
  
public class MainActivity extends Activity {
+
public class MainActivity extends Activity {
}
+
}
 +
 
 
Services
 
Services
 
A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.
 
A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.
Line 126: Line 79:
 
A service is implemented as a subclass of Service class as follows −
 
A service is implemented as a subclass of Service class as follows −
  
public class MyService extends Service {
+
public class MyService extends Service {
}
+
}
 +
 
 
Broadcast Receivers
 
Broadcast Receivers
 
Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.
 
Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.
Line 133: Line 87:
 
A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.
 
A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.
  
public class MyReceiver  extends  BroadcastReceiver {
+
public class MyReceiver  extends  BroadcastReceiver {
  public void onReceive(context,intent){}
+
    public void onReceive(context,intent){}
}
+
}
 +
 
 
Content Providers
 
Content Providers
 
A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.
 
A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.
Line 141: Line 96:
 
A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.
 
A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.
  
public class MyContentProvider extends  ContentProvider {
+
public class MyContentProvider extends  ContentProvider {
  public void onCreate(){}
+
    public void onCreate(){}
}
+
}
 +
 
 
We will go through these tags in detail while covering application components in individual chapters.
 
We will go through these tags in detail while covering application components in individual chapters.
  
Line 150: Line 106:
  
 
S.No Components & Description
 
S.No Components & Description
1
+
  1 Fragments   Represents a portion of user interface in an Activity.
Fragments
+
  2 Views       UI elements that are drawn on-screen including buttons, lists forms etc.
 
+
  3 Layouts     View hierarchies that control screen format and appearance of the views.
Represents a portion of user interface in an Activity.
+
  4 Intents     Messages wiring components together.
 
+
  5 Resources   External elements, such as strings, constants and drawable pictures.
2
+
  6 Manifest     Configuration file for the application.
Views
 
 
 
UI elements that are drawn on-screen including buttons, lists forms etc.
 
 
 
3
 
Layouts
 
 
 
View hierarchies that control screen format and appearance of the views.
 
 
 
4
 
Intents
 
 
 
Messages wiring components together.
 
 
 
5
 
Resources
 
 
 
External elements, such as strings, constants and drawable pictures.
 
 
 
6
 
Manifest
 
  
Configuration file for the application.
 
  
 
==Referensi==
 
==Referensi==
  
 
* https://www.tutorialspoint.com/android/android_application_components.htm
 
* https://www.tutorialspoint.com/android/android_application_components.htm

Revision as of 10:47, 8 June 2022

Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact.

There are following four main components that can be used within an Android application −

Sr.No	Components & Description
   1	Activities           They dictate the UI and handle the user interaction to the smart phone screen.
   2	Services             They handle background processing associated with an application.
   3	Broadcast Receivers  They handle communication between Android OS and applications.
   4	Content Providers    They handle data and database management issues.

Activities An activity represents a single screen with a user interface,in-short Activity performs actions on the screen. For example, an email application might have one activity that shows a list of new emails, another activity to compose an email, and another activity for reading emails. If an application has more than one activity, then one of them should be marked as the activity that is presented when the application is launched.

An activity is implemented as a subclass of Activity class as follows −

public class MainActivity extends Activity {
}

Services A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.

A service is implemented as a subclass of Service class as follows −

public class MyService extends Service {
}

Broadcast Receivers Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.

A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.

public class MyReceiver  extends  BroadcastReceiver {
   public void onReceive(context,intent){}
}

Content Providers A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.

A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.

public class MyContentProvider extends  ContentProvider {
   public void onCreate(){}
}

We will go through these tags in detail while covering application components in individual chapters.

Additional Components There are additional components which will be used in the construction of above mentioned entities, their logic, and wiring between them. These components are −

S.No Components & Description

 1	Fragments    Represents a portion of user interface in an Activity.
 2	Views        UI elements that are drawn on-screen including buttons, lists forms etc.
 3	Layouts      View hierarchies that control screen format and appearance of the views.
 4	Intents      Messages wiring components together.
 5	Resources    External elements, such as strings, constants and drawable pictures.
 6	Manifest     Configuration file for the application.

Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact.

There are following four main components that can be used within an Android application −

Sr.No Components & Description

  1	Activities           They dictate the UI and handle the user interaction to the smart phone screen.
  2	Services             They handle background processing associated with an application.
  3	Broadcast Receivers  They handle communication between Android OS and applications.
  4	Content Providers    They handle data and database management issues.

Activities An activity represents a single screen with a user interface,in-short Activity performs actions on the screen. For example, an email application might have one activity that shows a list of new emails, another activity to compose an email, and another activity for reading emails. If an application has more than one activity, then one of them should be marked as the activity that is presented when the application is launched.

An activity is implemented as a subclass of Activity class as follows −

public class MainActivity extends Activity {
}

Services A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity.

A service is implemented as a subclass of Service class as follows −

public class MyService extends Service {
}

Broadcast Receivers Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action.

A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcaster as an Intent object.

public class MyReceiver  extends  BroadcastReceiver {
   public void onReceive(context,intent){}
}

Content Providers A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely.

A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions.

public class MyContentProvider extends  ContentProvider {
   public void onCreate(){}
}

We will go through these tags in detail while covering application components in individual chapters.

Additional Components There are additional components which will be used in the construction of above mentioned entities, their logic, and wiring between them. These components are −

S.No Components & Description

 1	Fragments    Represents a portion of user interface in an Activity.
 2	Views        UI elements that are drawn on-screen including buttons, lists forms etc.
 3	Layouts      View hierarchies that control screen format and appearance of the views.
 4	Intents      Messages wiring components together.
 5	Resources    External elements, such as strings, constants and drawable pictures.
 6	Manifest     Configuration file for the application.


Referensi