Android ScrollView rapide alphabétique dans RecyclerView avec barre D'outils S'effondrant

nous voulons ConnaissancesSectionIndexer. DocSectionIndexer.

Nous avons définirsetFastScrollEnabled(true) méthode, qui est utilisé avec l' LISTVIEW.......Vous pouvez utiliser recyclerview au lieu de listView dans l'exemple ci-dessous....

c'est l'activité

public class FastScoll extends ListActivity {

    ListView fruitView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_fast_scoll);

        fruitView = (ListView) findViewById(android.R.id.list);

        fruitView.setFastScrollEnabled(true);
        String[] fruits = getResources().getStringArray(R.array.fruits_array);

        final List<String> fruitList = Arrays.asList(fruits);
        Collections.sort(fruitList);
        setListAdapter(new ListAdapter(this, fruitList));

        fruitView.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View arg1,
                                    int position, long arg3) {
                Log.e("sushildlh",fruitList.get(position));
            }
        });

    }
}

ceci est l'activity_fast_scoll.fichier xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="5dp" >

    <ListView
        android:id="@android:id/list"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:scrollbarStyle="outsideOverlay" />

</RelativeLayout>

et voici mon adaptateur personnalisé avec SectionIndexer....

public class ListAdapter extends ArrayAdapter<String> implements SectionIndexer {

    String[] sections;
    List<String> fruits;
    List<String> sectionLetters=new ArrayList<String>();

    public ListAdapter(Context context, List<String> fruitList) {
        super(context, android.R.layout.simple_list_item_1, fruitList);
        this.fruits = fruitList;

        for (int x = 0; x < fruits.size(); x++) {
            String fruit = fruits.get(x);
            String ch = fruit.charAt(0)+"";
            ch = ch.toUpperCase(Locale.US);

            sectionLetters.add(ch);
        }

        ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);

        sections = new String[sectionList.size()];

        sectionList.toArray(sections);
    }

    public int getPositionForSection(int section) {

        Log.e("sushildlh", "" + section);
        return section;
    }

    public int getSectionForPosition(int position) {

        Log.d("sushildlh", "" + position);
        return position;
    }

    public Object[] getSections() {
        return sections;
    }
}

ceci est fruits array en chaîne.fichier xml.

 <string-array name="fruits_array">
            <item>Apples</item>
            <item>Apricots</item>
            <item>Avocado</item>
            <item>Annona</item>
            <item>Banana</item>
            <item>Bilberry</item>
            <item>Blackberry</item>
            <item>Custard Apple</item>
            <item>Clementine</item>
            <item>Cantalope</item>
            <item>Coconut</item>
            <item>Currant</item>
            <item>Cherry</item>
            <item>Cherimoya</item>
            <item>Date</item>
            <item>Damson</item>
            <item>Durian</item>
            <item>Elderberry</item>
            <item>Fig</item>
            <item>Feijoa</item>
            <item>Grapefruit</item>
            <item>Grape</item>
            <item>Gooseberry</item>
            <item>Guava</item>
            <item>Honeydew melon</item>
            <item>Huckleberry</item>
            <item>Jackfruit</item>
            <item>Juniper Berry</item>
            <item>Jambul</item>
            <item>Jujube</item>
            <item>Kiwi</item>
            <item>Kumquat</item>
            <item>Lemons</item>
            <item>Limes</item>
            <item>Lychee</item>
            <item>Mango</item>
            <item>Mandarin</item>
            <item>Mangostine</item>
            <item>Nectaraine</item>
            <item>Orange</item>
            <item>Olive</item>
            <item>Prunes</item>
            <item>Pears</item>
            <item>Plum</item>
            <item>Pineapple</item>
            <item>Peach</item>
            <item>Papaya</item>
            <item>Passionfruit</item>
            <item>Pomegranate</item>
            <item>Pomelo</item>
            <item>Raspberries</item>
            <item>Rock melon</item>
            <item>Rambutan</item>
            <item>Strawberries</item>
            <item>Sweety</item>
            <item>Salmonberry</item>
            <item>Satsuma</item>
            <item>Tangerines</item>
            <item>Tomato</item>
            <item>Ugli</item>
            <item>Watermelon</item>
            <item>Woodapple</item>
        </string-array>

et enfin c'est la sortie de ce code....

N'hésitez pas à demander si vous êtes resté quelque part entre les codes ....

Remarque:- FastScroll image seront les mêmes dans les différentes version d'android (par exemple:-lollipop,marshmallow,etc) ci-dessous la sortie est pour lollipop

Personnaliser Alphabétique Rapide scrollView simplement ajouter ces 2 lignes dans votre style.xml fichier AppTheme.

<item name="android:fastScrollTextColor">@color/apptheme_color</item>         //this is used for the color of the Alphabetical Fast scrollView
<item name="android:fastScrollPreviewBackgroundRight">@drawable/bg_default_focused_holo_light</item>          //this is the image or and drawable file you want to set on Alphabetical Fast scrollView

Custom Fast Scorl Output: -

Il y a une bonne bibliothèque ici avec cette exemple. Il y a aussi un bon tutoriel ici avec cet exemple Github.

Utilisation:

faire une RecyclerView.Adaptateur qui met en œuvre BubbleTextGetter, qui donne une position dans les données retournera le texte à afficher dans la bulle-popup. placer le FastScroller à l'intérieur de la disposition que le conteneur de la RecyclerView (probablement à la droite zone.)

personnaliser le FastScroller quelques inconvénients:

ne supporte pas le changement d'orientation, mais c'est probablement facile à réparer. il ne supporte pas les autres managers de layout. Seulement LinearLayoutManager Besoin API 11 et plus.

Code:

BubbleTextGetter

public interface BubbleTextGetter
  {
  String getTextToShowInBubble(int pos);
  }

recycleur _ view _ fast _ scroller_ _ fast_scroller.xml

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:tools="http://schemas.android.com/tools"
       android:layout_width="wrap_content"
       android:layout_height="match_parent">

  <TextView
    android:id="@+id/fastscroller_bubble"
    android:layout_gravity="right|end"
    android:gravity="center"
    android:textSize="48sp" tools:text="A"
    android:layout_width="wrap_content"
    android:textColor="#FFffffff"
    android:layout_height="wrap_content"
    android:background="@drawable/recycler_view_fast_scroller__bubble"
    android:visibility="visible"/>

  <ImageView
    android:id="@+id/fastscroller_handle"
    android:layout_width="wrap_content"
    android:layout_marginRight="8dp"
    android:layout_marginLeft="8dp"
    android:layout_height="wrap_content"
    android:src="@drawable/recycler_view_fast_scroller__handle"/>

</merge>

maintenant ce ScrollListener:

private class ScrollListener extends OnScrollListener
    {
    @Override
    public void onScrolled(RecyclerView rv,int dx,int dy)
      {
      View firstVisibleView=recyclerView.getChildAt(0);
      int firstVisiblePosition=recyclerView.getChildPosition(firstVisibleView);
      int visibleRange=recyclerView.getChildCount();
      int lastVisiblePosition=firstVisiblePosition+visibleRange;
      int itemCount=recyclerView.getAdapter().getItemCount();
      int position;
      if(firstVisiblePosition==0)
        position=0;
      else if(lastVisiblePosition==itemCount-1)
        position=itemCount-1;
      else
        position=firstVisiblePosition;
      float proportion=(float)position/(float)itemCount;
      setPosition(height*proportion);
      }
    }
  }

Cette coutume LinearLayout:

public class FastScroller extends LinearLayout
  {
  private static final int BUBBLE_ANIMATION_DURATION=100;
  private static final int TRACK_SNAP_RANGE=5;

  private TextView bubble;
  private View handle;
  private RecyclerView recyclerView;
  private final ScrollListener scrollListener=new ScrollListener();
  private int height;

  private ObjectAnimator currentAnimator=null;

  public FastScroller(final Context context,final AttributeSet attrs,final int defStyleAttr)
    {
    super(context,attrs,defStyleAttr);
    initialise(context);
    }

  public FastScroller(final Context context)
    {
    super(context);
    initialise(context);
    }

  public FastScroller(final Context context,final AttributeSet attrs)
    {
    super(context,attrs);
    initialise(context);
    }

  private void initialise(Context context)
    {
    setOrientation(HORIZONTAL);
    setClipChildren(false);
    LayoutInflater inflater=LayoutInflater.from(context);
    inflater.inflate(R.layout.recycler_view_fast_scroller__fast_scroller,this,true);
    bubble=(TextView)findViewById(R.id.fastscroller_bubble);
    handle=findViewById(R.id.fastscroller_handle);
    bubble.setVisibility(INVISIBLE);
    }

  @Override
  protected void onSizeChanged(int w,int h,int oldw,int oldh)
    {
    super.onSizeChanged(w,h,oldw,oldh);
    height=h;
    }

  @Override
  public boolean onTouchEvent(@NonNull MotionEvent event)
    {
    final int action=event.getAction();
    switch(action)
      {
      case MotionEvent.ACTION_DOWN:
        if(event.getX()<handle.getX())
          return false;
        if(currentAnimator!=null)
          currentAnimator.cancel();
        if(bubble.getVisibility()==INVISIBLE)
          showBubble();
        handle.setSelected(true);
      case MotionEvent.ACTION_MOVE:
        setPosition(event.getY());
        setRecyclerViewPosition(event.getY());
        return true;
      case MotionEvent.ACTION_UP:
      case MotionEvent.ACTION_CANCEL:
        handle.setSelected(false);
        hideBubble();
        return true;
      }
    return super.onTouchEvent(event);
    }

  public void setRecyclerView(RecyclerView recyclerView)
    {
    this.recyclerView=recyclerView;
    recyclerView.setOnScrollListener(scrollListener);
    }

  private void setRecyclerViewPosition(float y)
    {
    if(recyclerView!=null)
      {
      int itemCount=recyclerView.getAdapter().getItemCount();
      float proportion;
      if(handle.getY()==0)
        proportion=0f;
      else if(handle.getY()+handle.getHeight()>=height-TRACK_SNAP_RANGE)
        proportion=1f;
      else
        proportion=y/(float)height;
      int targetPos=getValueInRange(0,itemCount-1,(int)(proportion*(float)itemCount));
      recyclerView.scrollToPosition(targetPos);
      String bubbleText=((BubbleTextGetter)recyclerView.getAdapter()).getTextToShowInBubble(targetPos);
      bubble.setText(bubbleText);
      }
    }

  private int getValueInRange(int min,int max,int value)
    {
    int minimum=Math.max(min,value);
    return Math.min(minimum,max);
    }

  private void setPosition(float y)
    {
    int bubbleHeight=bubble.getHeight();
    int handleHeight=handle.getHeight();
    handle.setY(getValueInRange(0,height-handleHeight,(int)(y-handleHeight/2)));
    bubble.setY(getValueInRange(0,height-bubbleHeight-handleHeight/2,(int)(y-bubbleHeight)));
    }

  private void showBubble()
    {
    AnimatorSet animatorSet=new AnimatorSet();
    bubble.setVisibility(VISIBLE);
    if(currentAnimator!=null)
      currentAnimator.cancel();
    currentAnimator=ObjectAnimator.ofFloat(bubble,"alpha",0f,1f).setDuration(BUBBLE_ANIMATION_DURATION);
    currentAnimator.start();
    }

  private void hideBubble()
    {
    if(currentAnimator!=null)
      currentAnimator.cancel();
    currentAnimator=ObjectAnimator.ofFloat(bubble,"alpha",1f,0f).setDuration(BUBBLE_ANIMATION_DURATION);
    currentAnimator.addListener(new AnimatorListenerAdapter()
    {
    @Override
    public void onAnimationEnd(Animator animation)
      {
      super.onAnimationEnd(animation);
      bubble.setVisibility(INVISIBLE);
      currentAnimator=null;
      }

    @Override
    public void onAnimationCancel(Animator animation)
      {
      super.onAnimationCancel(animation);
      bubble.setVisibility(INVISIBLE);
      currentAnimator=null;
      }
    });
    currentAnimator.start();
    }

La dernière étape de votre activité onCreate:

    setContentView(R.layout.activity_main);
    RecyclerView recyclerView =(RecyclerView)findViewById(R.id.activity_main_recyclerview);


    FastScroller fastScroller=(FastScroller)findViewById(R.id.fastscroller);
    fastScroller.setRecyclerView(recyclerView);

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/theme_background"
    android:id="@+id/drawerlayout">

    <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        android:id="@+id/activity_main_id"
        tools:context="objectdistance.ajai.ram.sita.gallery.MainActivity">

        <android.support.design.widget.AppBarLayout
            android:id="@+id/app_bar_layout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:fitsSystemWindows="true"
          android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsing_toolbar"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed"
                app:contentScrim="?attr/colorPrimary"
                app:expandedTitleMarginStart="48dp"
                app:expandedTitleMarginEnd="64dp"
                android:fitsSystemWindows="true">

                <ImageView
                    android:id="@+id/imagetoolbar"
                    android:layout_width="match_parent"
                    android:layout_height="200dp"
                    android:scaleType="centerCrop"
                    android:fitsSystemWindows="true"
                    android:foreground="@drawable/image_header_foreground"
                    app:layout_scrollFlags="scroll"
                    app:layout_collapseMode="parallax"/>

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                    android:background="@drawable/theme_background"
                    app:layout_collapseMode="pin" >

                    <Spinner
                        android:id="@+id/spinner_nav"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:dropDownVerticalOffset="?attr/actionBarSize" />

                </android.support.v7.widget.Toolbar>

            </android.support.design.widget.CollapsingToolbarLayout>

        </android.support.design.widget.AppBarLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/activity_main_recyclerview"
        android:layout_width="match_parent"
        android:layout_height="@dimen/activity_main_height"
        android:background="@android:color/darker_gray" />
 </android.support.design.widget.CoordinatorLayout>
</android.support.v4.widget.DrawerLayout>