What is Flag activity?

Use Intent Flags Intents are used to launch activities on Android. You can set flags that control the task that will contain the activity. Flags exist to create a new activity, use an existing activity, or bring an existing instance of an activity to the front.

What is launch mode single top?

Single Top If an instance of the activity already exists at the top of the current task in this launch mode, no new instance will be generated, and the Android system will send the intent data through onNewIntent (). If an instance does not exist on top of the task, a new instance will be generated.

What is Flag_activity_clear_top?

flag — FLAG_ACTIVITY_CLEAR_TOP: If the Activity being started is already running in the current task then instead of launching the new instance of that Activity, all the other activities on top of it is destroyed (with call to onDestroy method) and this intent is delivered to the resumed instance of the Activity (now …

Which activity state is attained when a new activity is started on top of the current activity?

When a new Activity is started on top of the current one or when a user hits the Home key, the activity is brought to Stopped state. The activity in this state is invisible, but it is not destroyed.

What are the types of flags to run an application in Android?

Following are two types of flags to run an application in Android:

• FLAG_ACTIVITY_NEW_TASK.
• FLAG_ACTIVITY_CLEAR_TOP.

What is single top in Android?

An Activity with singleTask launchMode is allowed to have only one instance in the system (a.k.a. Singleton). If there is an existed Activity instance in the system, the whole Task hold the instance would be moved to top while Intent would be delivered through onNewIntent() method.

What is finishAffinity?

finishAffinity() : finishAffinity() is not used to “shutdown an application”. It is used to remove a number of Activities belonging to a specific application from the current task (which may contain Activities belonging to multiple applications).

What is an activity explain lifecycle of an activity?

Activity Lifecycle: Activity is one of the building blocks of Android OS. In simple words Activity is a screen that user interact with. Every Activity in android has lifecycle like created, started, resumed, paused, stopped or destroyed. These different states are known as Activity Lifecycle.

What is the order of the activity lifecycle?

Activity-lifecycle concepts To navigate transitions between stages of the activity lifecycle, the Activity class provides a core set of six callbacks: onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() . The system invokes each of these callbacks as an activity enters a new state.