ListFragment
  public
  
  
  
  class
  ListFragment
  
  
  
  
    extends Fragment
  
  
  
  
  
  
| java.lang.Object | ||
| ↳ | android.app.Fragment | |
| ↳ | android.app.ListFragment | |
      This class was deprecated
      in API level 28.
    Use the Support Library
      ListFragment for consistent behavior across all devices
      and access to Lifecycle.
  
A fragment that displays a list of items by binding to a data source such as an array or Cursor, and exposes event handlers when the user selects an item.
 ListFragment hosts a ListView object that can
 be bound to different data sources, typically either an array or a Cursor
 holding query results. Binding, screen layout, and row layout are discussed
 in the following sections.
 
Screen Layout
 ListFragment has a default layout that consists of a single list view.
 However, if you desire, you can customize the fragment layout by returning
 your own view hierarchy from onCreateView(LayoutInflater, ViewGroup, Bundle).
 To do this, your view hierarchy must contain a ListView object with the
 id "@android:id/list" (or R.id.list if it's in code)
 
Optionally, your view hierarchy can contain another view object of any type to display when the list view is empty. This "empty list" notifier must have an id "android:empty". Note that when an empty view is present, the list view will be hidden when there is no data to display.
The following code demonstrates an (ugly) custom list layout. It has a list with a green background, and an alternate red "no data" message.
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:orientation="vertical"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:paddingLeft="8dp"
         android:paddingRight="8dp">
     <ListView android:id="@id/android:list"
               android:layout_width="match_parent"
               android:layout_height="match_parent"
               android:background="#00FF00"
               android:layout_weight="1"
               android:drawSelectorOnTop="false"/>
     <TextView android:id="@id/android:empty"
               android:layout_width="match_parent"
               android:layout_height="match_parent"
               android:background="#FF0000"
               android:text="No data"/>
 </LinearLayout>
 Row Layout
You can specify the layout of individual rows in the list. You do this by specifying a layout resource in the ListAdapter object hosted by the fragment (the ListAdapter binds the ListView to the data; more on this later).
A ListAdapter constructor takes a parameter that specifies a layout resource for each row. It also has two additional parameters that let you specify which data field to associate with which object in the row layout resource. These two parameters are typically parallel arrays.
 Android provides some standard row layout resources. These are in the
 R.layout class, and have names such as simple_list_item_1,
 simple_list_item_2, and two_line_list_item. The following layout XML is the
 source for the resource two_line_list_item, which displays two data
 fields,one above the other, for each list row.
 
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical">
     <TextView android:id="@+id/text1"
         android:textSize="16sp"
         android:textStyle="bold"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"/>
     <TextView android:id="@+id/text2"
         android:textSize="16sp"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"/>
 </LinearLayout>
 You must identify the data bound to each TextView object in this layout. The syntax for this is discussed in the next section.
Binding to Data
 You bind the ListFragment's ListView object to data using a class that
 implements the ListAdapter interface.
 Android provides two standard list adapters:
 SimpleAdapter for static data (Maps),
 and SimpleCursorAdapter for Cursor
 query results.
 
 You must use
 ListFragment.setListAdapter() to
 associate the list with an adapter.  Do not directly call
 ListView.setAdapter() or else
 important initialization will be skipped.
 
See also:
Summary
| Inherited XML attributes | |
|---|---|
| Inherited constants | 
|---|
| Public constructors | |
|---|---|
| 
      ListFragment()
       | |
| Public methods | |
|---|---|
| 
        
        
        
        
        
        ListAdapter | 
      getListAdapter()
      Get the ListAdapter associated with this fragment's ListView. | 
| 
        
        
        
        
        
        ListView | 
      getListView()
      Get the fragment's list view widget. | 
| 
        
        
        
        
        
        long | 
      getSelectedItemId()
      Get the cursor row ID of the currently selected list item. | 
| 
        
        
        
        
        
        int | 
      getSelectedItemPosition()
      Get the position of the currently selected list item. | 
| 
        
        
        
        
        
        View | 
      onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
      Provide default implementation to return a simple list view. | 
| 
        
        
        
        
        
        void | 
      onDestroyView()
      Detach from list view. | 
| 
        
        
        
        
        
        void | 
      onListItemClick(ListView l, View v, int position, long id)
      This method will be called when an item in the list is selected. | 
| 
        
        
        
        
        
        void | 
      onViewCreated(View view, Bundle savedInstanceState)
      Attach to list view once the view hierarchy has been created. | 
| 
        
        
        
        
        
        void | 
      setEmptyText(CharSequence text)
      The default content for a ListFragment has a TextView that can be shown when the list is empty. | 
| 
        
        
        
        
        
        void | 
      setListAdapter(ListAdapter adapter)
      Provide the cursor for the list view. | 
| 
        
        
        
        
        
        void | 
      setListShown(boolean shown)
      Control whether the list is being displayed. | 
| 
        
        
        
        
        
        void | 
      setListShownNoAnimation(boolean shown)
      Like  | 
| 
        
        
        
        
        
        void | 
      setSelection(int position)
      Set the currently selected list item to the specified position with the adapter's data | 
| Inherited methods | |
|---|---|
Public constructors
Public methods
getListAdapter
public ListAdapter getListAdapter ()
Get the ListAdapter associated with this fragment's ListView.
| Returns | |
|---|---|
| ListAdapter | |
getListView
public ListView getListView ()
Get the fragment's list view widget.
| Returns | |
|---|---|
| ListView | |
getSelectedItemId
public long getSelectedItemId ()
Get the cursor row ID of the currently selected list item.
| Returns | |
|---|---|
| long | |
getSelectedItemPosition
public int getSelectedItemPosition ()
Get the position of the currently selected list item.
| Returns | |
|---|---|
| int | |
onCreateView
public View onCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
Provide default implementation to return a simple list view.  Subclasses
 can override to replace with their own layout.  If doing so, the
 returned view hierarchy must have a ListView whose id
 is android.R.id.list and can optionally
 have a sibling view id android.R.id.empty
 that is to be shown when the list is empty.
 
If you are overriding this method with your own custom content,
 consider including the standard layout R.layout.list_content
 in your layout file, so that you continue to retain all of the standard
 behavior of ListFragment.  In particular, this is currently the only
 way to have the built-in indeterminant progress state be shown.
| Parameters | |
|---|---|
| inflater | LayoutInflater: The LayoutInflater object that can be used to inflate
 any views in the fragment, | 
| container | ViewGroup: If non-null, this is the parent view that the fragment's
 UI should be attached to.  The fragment should not add the view itself,
 but this can be used to generate the LayoutParams of the view. | 
| savedInstanceState | Bundle: If non-null, this fragment is being re-constructed
 from a previous saved state as given here. | 
| Returns | |
|---|---|
| View | Return the View for the fragment's UI, or null. | 
onListItemClick
public void onListItemClick (ListView l, View v, int position, long id)
This method will be called when an item in the list is selected. Subclasses should override. Subclasses can call getListView().getItemAtPosition(position) if they need to access the data associated with the selected item.
| Parameters | |
|---|---|
| l | ListView: The ListView where the click happened | 
| v | View: The view that was clicked within the ListView | 
| position | int: The position of the view in the list | 
| id | long: The row id of the item that was clicked | 
onViewCreated
public void onViewCreated (View view, Bundle savedInstanceState)
Attach to list view once the view hierarchy has been created.
| Parameters | |
|---|---|
| view | View: The View returned byonCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle). | 
| savedInstanceState | Bundle: If non-null, this fragment is being re-constructed
 from a previous saved state as given here. | 
setEmptyText
public void setEmptyText (CharSequence text)
The default content for a ListFragment has a TextView that can be shown when the list is empty. If you would like to have it shown, call this method to supply the text it should use.
| Parameters | |
|---|---|
| text | CharSequence | 
setListAdapter
public void setListAdapter (ListAdapter adapter)
Provide the cursor for the list view.
| Parameters | |
|---|---|
| adapter | ListAdapter | 
setListShown
public void setListShown (boolean shown)
Control whether the list is being displayed. You can make it not displayed if you are waiting for the initial data to show in it. During this time an indeterminant progress indicator will be shown instead.
Applications do not normally need to use this themselves.  The default
 behavior of ListFragment is to start with the list not being shown, only
 showing it once an adapter is given with setListAdapter(android.widget.ListAdapter).
 If the list at that point had not been shown, when it does get shown
 it will be do without the user ever seeing the hidden state.
| Parameters | |
|---|---|
| shown | boolean: If true, the list view is shown; if false, the progress
 indicator.  The initial value is true. | 
setListShownNoAnimation
public void setListShownNoAnimation (boolean shown)
Like setListShown(boolean), but no animation is used when
 transitioning from the previous state.
| Parameters | |
|---|---|
| shown | boolean | 
setSelection
public void setSelection (int position)
Set the currently selected list item to the specified position with the adapter's data
