Low Level Android app fundamentals: Rookie/Novice/fresher...

APPLICATION COMPONENTS:

1. Activity(ACT)

activity, window(W), view(V)
Activity.setContentView()

2. Service(SVC)-

3.  Broadcast Receiver(BR)- 

4. Content Provider(CP)- 

ContentProvider(CP) and ContentResolver(CR)

ACTIVATING COMPONENTS USING INTENT

ACT:

Context.startActivity() 

Activity.startActivityForResult(). 

getIntent() 

onNewIntent() 

onActivityResult()

SVC:

Context.startService()

onStart() 

Context.bindService() 

onBind() 




BR:

Context.sendBroadcast()

Context.sendOrderedBroadcast()

Context.sendStickyBroadcast()

onReceive()





SHUTTING DOWN COMPONENTS

ACT:
finish()
finishActivity(). (startActivityForResult())


SVC:
stopSelf() 
Context.stopService().



THE MANIFEST FILE

<activity> 

<service>

<receiver>

<provider>

Context.registerReceiver().

INTENT FILTERS

ACTIVITIES AND TASKS

The principal Intent flags are:

FLAG_ACTIVITY_NEW_TASK
FLAG_ACTIVITY_CLEAR_TOP
FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
FLAG_ACTIVITY_SINGLE_TOP

The principal <activity> attributes are:

taskAffinity
launchMode
allowTaskReparenting
clearTaskOnLaunch
alwaysRetainTaskState
finishOnTaskLaunch