belongs to Maven artifact com.android.support:support-v13:28.0.0-alpha1
Deprecated since version 27.1.0
FragmentPagerAdapter
public
abstract
class
FragmentPagerAdapter
extends PagerAdapter
| java.lang.Object | ||
| ↳ | android.support.v4.view.PagerAdapter | |
| ↳ | android.support.v13.app.FragmentPagerAdapter | |
This class was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Implementation of PagerAdapter that
represents each page as a Fragment that is persistently
kept in the fragment manager as long as the user can return to the page.
This version of the pager is best for use when there are a handful of
typically more static fragments to be paged through, such as a set of tabs.
The fragment of each page the user visits will be kept in memory, though its
view hierarchy may be destroyed when not visible. This can result in using
a significant amount of memory since fragment instances can hold on to an
arbitrary amount of state. For larger sets of pages, consider
FragmentStatePagerAdapter.
When using FragmentPagerAdapter the host ViewPager must have a valid ID set.
Subclasses only need to implement getItem(int)
and getCount() to have a working adapter.
Here is an example implementation of a pager containing fragments of lists:
public class FragmentPagerSupport extends Activity {
static final int NUM_ITEMS = 10;
MyAdapter mAdapter;
ViewPager mPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_pager);
mAdapter = new MyAdapter(getFragmentManager());
mPager = (ViewPager)findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
// Watch for button clicks.
Button button = (Button)findViewById(R.id.goto_first);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mPager.setCurrentItem(0);
}
});
button = (Button)findViewById(R.id.goto_last);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mPager.setCurrentItem(NUM_ITEMS-1);
}
});
}
public static class MyAdapter extends FragmentPagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public int getCount() {
return NUM_ITEMS;
}
@Override
public Fragment getItem(int position) {
return ArrayListFragment.newInstance(position);
}
}
public static class ArrayListFragment extends ListFragment {
int mNum;
/**
* Create a new instance of CountingFragment, providing "num"
* as an argument.
*/
static ArrayListFragment newInstance(int num) {
ArrayListFragment f = new ArrayListFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
/**
* When creating, retrieve this instance's number from its arguments.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNum = getArguments() != null ? getArguments().getInt("num") : 1;
}
/**
* The Fragment's UI is just a simple text view showing its
* instance number.
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_pager_list, container, false);
View tv = v.findViewById(R.id.text);
((TextView)tv).setText("Fragment #" + mNum);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, Cheeses.sCheeseStrings));
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
Log.i("FragmentList", "Item clicked: " + id);
}
}
}The R.layout.fragment_pager resource of the top-level fragment is:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:padding="4dip"
android:gravity="center_horizontal"
android:layout_width="match_parent" android:layout_height="match_parent">
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1">
</android.support.v4.view.ViewPager>
<LinearLayout android:orientation="horizontal"
android:gravity="center" android:measureWithLargestChild="true"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:layout_weight="0">
<Button android:id="@+id/goto_first"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="@string/first">
</Button>
<Button android:id="@+id/goto_last"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:text="@string/last">
</Button>
</LinearLayout>
</LinearLayout>The R.layout.fragment_pager_list resource containing each
individual fragment's layout is:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:drawable/gallery_thumb">
<TextView android:id="@+id/text"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:gravity="center_vertical|center_horizontal"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="@string/hello_world"/>
<!-- The frame layout is here since we will be showing either
the empty view or the list view. -->
<FrameLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1" >
<!-- Here is the list. Since we are using a ListActivity, we
have to call it "@android:id/list" so ListActivity will
find it -->
<ListView android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:drawSelectorOnTop="false"/>
<!-- Here is the view to show if the list is emtpy -->
<TextView android:id="@android:id/empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="No items."/>
</FrameLayout>
</LinearLayout>Summary
Inherited constants |
|---|
From
class
android.support.v4.view.PagerAdapter
|
Public constructors | |
|---|---|
FragmentPagerAdapter(FragmentManager fm)
This constructor was deprecated
in API level 27.1.0.
Use |
|
Public methods | |
|---|---|
void
|
destroyItem(ViewGroup container, int position, Object object)
This method was deprecated
in API level 27.1.0.
Use |
void
|
finishUpdate(ViewGroup container)
This method was deprecated
in API level 27.1.0.
Use |
abstract
Fragment
|
getItem(int position)
This method was deprecated
in API level 27.1.0.
Use |
long
|
getItemId(int position)
This method was deprecated
in API level 27.1.0.
Use |
Object
|
instantiateItem(ViewGroup container, int position)
This method was deprecated
in API level 27.1.0.
Use |
boolean
|
isViewFromObject(View view, Object object)
This method was deprecated
in API level 27.1.0.
Use |
void
|
restoreState(Parcelable state, ClassLoader loader)
This method was deprecated
in API level 27.1.0.
Use |
Parcelable
|
saveState()
This method was deprecated
in API level 27.1.0.
Use |
void
|
setPrimaryItem(ViewGroup container, int position, Object object)
This method was deprecated
in API level 27.1.0.
Use |
void
|
startUpdate(ViewGroup container)
This method was deprecated
in API level 27.1.0.
Use |
Inherited methods | |
|---|---|
From
class
android.support.v4.view.PagerAdapter
| |
From
class
java.lang.Object
| |
Public constructors
FragmentPagerAdapter
FragmentPagerAdapter (FragmentManager fm)
This constructor was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
| Parameters | |
|---|---|
fm |
FragmentManager |
Public methods
destroyItem
void destroyItem (ViewGroup container, int position, Object object)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Remove a page for the given position. The adapter is responsible
for removing the view from its container, although it only must ensure
this is done by the time it returns from finishUpdate(ViewGroup).
| Parameters | |
|---|---|
container |
ViewGroup: The containing View from which the page will be removed. |
position |
int: The page position to be removed. |
object |
Object: The same object that was returned by
instantiateItem(View, int).
|
finishUpdate
void finishUpdate (ViewGroup container)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Called when the a change in the shown pages has been completed. At this point you must ensure that all of the pages have actually been added or removed from the container as appropriate.
| Parameters | |
|---|---|
container |
ViewGroup: The containing View which is displaying this adapter's
page views.
|
getItem
Fragment getItem (int position)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Return the Fragment associated with a specified position.
| Parameters | |
|---|---|
position |
int |
| Returns | |
|---|---|
Fragment |
|
getItemId
long getItemId (int position)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Return a unique identifier for the item at the given position.
The default implementation returns the given position. Subclasses should override this method if the positions of items can change.
| Parameters | |
|---|---|
position |
int: Position within this adapter |
| Returns | |
|---|---|
long |
Unique identifier for the item at position |
instantiateItem
Object instantiateItem (ViewGroup container, int position)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Create the page for the given position. The adapter is responsible
for adding the view to the container given here, although it only
must ensure this is done by the time it returns from
finishUpdate(ViewGroup).
| Parameters | |
|---|---|
container |
ViewGroup: The containing View in which the page will be shown. |
position |
int: The page position to be instantiated. |
| Returns | |
|---|---|
Object |
Returns an Object representing the new page. This does not need to be a View, but can be some other container of the page. |
isViewFromObject
boolean isViewFromObject (View view, Object object)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Determines whether a page View is associated with a specific key object
as returned by instantiateItem(ViewGroup, int). This method is
required for a PagerAdapter to function properly.
| Parameters | |
|---|---|
view |
View: Page View to check for association with object |
object |
Object: Object to check for association with view |
| Returns | |
|---|---|
boolean |
true if view is associated with the key object object
|
restoreState
void restoreState (Parcelable state, ClassLoader loader)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Restore any instance state associated with this adapter and its pages
that was previously saved by saveState().
| Parameters | |
|---|---|
state |
Parcelable: State previously saved by a call to saveState() |
loader |
ClassLoader: A ClassLoader that should be used to instantiate any restored objects
|
saveState
Parcelable saveState ()
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Save any instance state associated with this adapter and its pages that should be restored if the current UI state needs to be reconstructed.
| Returns | |
|---|---|
Parcelable |
Saved state for this adapter |
setPrimaryItem
void setPrimaryItem (ViewGroup container, int position, Object object)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Called to inform the adapter of which item is currently considered to be the "primary", that is the one show to the user as the current page. This method will not be invoked when the adapter contains no items.
| Parameters | |
|---|---|
container |
ViewGroup: The containing View from which the page will be removed. |
position |
int: The page position that is now the primary. |
object |
Object: The same object that was returned by
instantiateItem(View, int).
|
startUpdate
void startUpdate (ViewGroup container)
This method was deprecated
in API level 27.1.0.
Use FragmentPagerAdapter instead.
Called when a change in the shown pages is going to start being made.
| Parameters | |
|---|---|
container |
ViewGroup: The containing View which is displaying this adapter's
page views.
|