TabActivity


public class TabActivity
extends ActivityGroup

java.lang.Object
   ↳ android.content.Context
     ↳ android.content.ContextWrapper
       ↳ android.view.ContextThemeWrapper
         ↳ android.app.Activity
           ↳ android.app.ActivityGroup
             ↳ android.app.TabActivity


This class was deprecated in API level 13.
New applications should use Fragments instead of this class; to continue to run on older devices, you can use the v4 support library which provides a version of the Fragment API that is compatible down to Build.VERSION_CODES.DONUT.

For apps developing against Build.VERSION_CODES.HONEYCOMB or later, tabs are typically presented in the UI using the new ActionBar.newTab() and related APIs for placing tabs within their action bar area.

Summary

Inherited constants

Inherited fields

Public constructors

TabActivity()

Public methods

TabHost getTabHost()

Returns the TabHost the activity is using to host its tabs.

TabWidget getTabWidget()

Returns the TabWidget the activity is using to draw the actual tabs.

void onContentChanged()

Updates the screen state (current list and other views) when the content changes.

void setDefaultTab(String tag)

Sets the default tab that is the first tab highlighted.

void setDefaultTab(int index)

Sets the default tab that is the first tab highlighted.

Protected methods

void onChildTitleChanged(Activity childActivity, CharSequence title)
void onPostCreate(Bundle icicle)

Called when activity start-up is complete (after onStart() and onRestoreInstanceState(Bundle) have been called).

void onRestoreInstanceState(Bundle state)

This method is called after onStart() when the activity is being re-initialized from a previously saved state, given here in savedInstanceState.

void onSaveInstanceState(Bundle outState)

Called to retrieve per-instance state from an activity before being killed so that the state can be restored in onCreate(Bundle) or onRestoreInstanceState(Bundle) (the Bundle populated by this method will be passed to both).

Inherited methods

Public constructors

TabActivity

Added in API level 1
public TabActivity ()

Public methods

getTabHost

Added in API level 1
public TabHost getTabHost ()

Returns the TabHost the activity is using to host its tabs.

Returns
TabHost the TabHost the activity is using to host its tabs.

getTabWidget

Added in API level 1
public TabWidget getTabWidget ()

Returns the TabWidget the activity is using to draw the actual tabs.

Returns
TabWidget the TabWidget the activity is using to draw the actual tabs.

onContentChanged

Added in API level 1
public void onContentChanged ()

Updates the screen state (current list and other views) when the content changes.

setDefaultTab

Added in API level 1
public void setDefaultTab (String tag)

Sets the default tab that is the first tab highlighted.

Parameters
tag String: the name of the default tab

setDefaultTab

Added in API level 1
public void setDefaultTab (int index)

Sets the default tab that is the first tab highlighted.

Parameters
index int: the index of the default tab

Protected methods

onChildTitleChanged

Added in API level 1
protected void onChildTitleChanged (Activity childActivity, 
                CharSequence title)

Parameters
childActivity Activity

title CharSequence

onPostCreate

Added in API level 1
protected void onPostCreate (Bundle icicle)

Called when activity start-up is complete (after onStart() and onRestoreInstanceState(Bundle) have been called). Applications will generally not implement this method; it is intended for system classes to do final initialization after application code has run.

Derived classes must call through to the super class's implementation of this method. If they do not, an exception will be thrown.


If you override this method you must call through to the superclass implementation.

Parameters
icicle Bundle: If the activity is being re-initialized after previously being shut down then this Bundle contains the data it most recently supplied in onSaveInstanceState(Bundle). Note: Otherwise it is null.

onRestoreInstanceState

Added in API level 1
protected void onRestoreInstanceState (Bundle state)

This method is called after onStart() when the activity is being re-initialized from a previously saved state, given here in savedInstanceState. Most implementations will simply use onCreate(Bundle) to restore their state, but it is sometimes convenient to do it here after all of the initialization has been done or to allow subclasses to decide whether to use your default implementation. The default implementation of this method performs a restore of any view state that had previously been frozen by onSaveInstanceState(Bundle).

This method is called between onStart() and onPostCreate(Bundle). This method is called only when recreating an activity; the method isn't invoked if onStart() is called for any other reason.

Parameters
state Bundle: the data most recently supplied in onSaveInstanceState(Bundle). This value cannot be null.

onSaveInstanceState

Added in API level 1
protected void onSaveInstanceState (Bundle outState)

Called to retrieve per-instance state from an activity before being killed so that the state can be restored in onCreate(Bundle) or onRestoreInstanceState(Bundle) (the Bundle populated by this method will be passed to both).

This method is called before an activity may be killed so that when it comes back some time in the future it can restore its state. For example, if activity B is launched in front of activity A, and at some point activity A is killed to reclaim resources, activity A will have a chance to save the current state of its user interface via this method so that when the user returns to activity A, the state of the user interface can be restored via onCreate(Bundle) or onRestoreInstanceState(Bundle).

Do not confuse this method with activity lifecycle callbacks such as onPause(), which is always called when the user no longer actively interacts with an activity, or onStop() which is called when activity becomes invisible. One example of when onPause() and onStop() is called and not this method is when a user navigates back from activity B to activity A: there is no need to call onSaveInstanceState(Bundle) on B because that particular instance will never be restored, so the system avoids calling it. An example when onPause() is called and not onSaveInstanceState(Bundle) is when activity B is launched in front of activity A: the system may avoid calling onSaveInstanceState(Bundle) on activity A if it isn't killed during the lifetime of B since the state of the user interface of A will stay intact.

The default implementation takes care of most of the UI per-instance state for you by calling View.onSaveInstanceState() on each view in the hierarchy that has an id, and by saving the id of the currently focused view (all of which is restored by the default implementation of onRestoreInstanceState(Bundle)). If you override this method to save additional information not captured by each individual view, you will likely want to call through to the default implementation, otherwise be prepared to save all of the state of each view yourself.

If called, this method will occur after onStop() for applications targeting platforms starting with Build.VERSION_CODES.P. For applications targeting earlier platform versions this method will occur before onStop() and there are no guarantees about whether it will occur before or after onPause().

Parameters
outState Bundle: Bundle in which to place your saved state. This value cannot be null.