RecyclerView

Question

स्क्रॉलिंग पर निचले पट्टी को ऊपर/नीचे कैसे स्क्रॉल करें, Google की हाल ही में डिज़ाइन सपोर्ट लाइब्रेरी के रिलीज के साथ कई शानदार नए विचार पेश किए गए हैं। कुछ नए घटकों का उपयोग करना (उदा। कोऑर्डिनेटरलाउट) शायद (!) आपको स्क्रॉलिंग व्यवहार प्राप्त करने में सक्षम बनाता है।

मैं व्यवहार स्क्रॉल लेकिन कुछ भी मेरे लिए काम कर रहा है में बनाया से कुछ के साथ tryed किया गया था,

मैं FloatingActionButton

यहाँ मैं क्या चाहते हैं के स्थान पर मेरे लेआउट में एक bottombar (LinearLayout) है।

1. इस स्क्रीन के नीचे लॉन्च बार दिखाना चाहिए।
2. रीसाइक्लिंगव्यू नीचे बार के स्क्रॉलअप पर स्क्रॉलडाउन होना चाहिए।
3. recyclerview नीचे पट्टी के scrolldown पर

वहाँ इस लक्ष्य को हासिल करने के लिए किसी भी अंतर्निहित तंत्र है scrollup चाहिए? या हमें जावा कोड लिखना चाहिए?

यहाँ मेरी कोड है:

main_activty.xml

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:fitsSystemWindows="true"> 

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

     <include layout="@layout/toolbar_srp" /> 

     <android.support.design.widget.TabLayout 
      android:id="@+id/tabs" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:elevation="5dp" 
      app:tabGravity="fill" 
      app:tabIndicatorColor="@android:color/white" 
      app:tabMode="fixed" /> 

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

    <!-- All Scrollable Views --> 

    <android.support.v4.view.ViewPager 
     android:id="@+id/viewpager" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" /> 

    <!-- Bottom bar--> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="bottom" 
     android:background="#a0000000" 
     android:orientation="horizontal" 
     android:paddingBottom="@dimen/padding_small" 
     android:paddingTop="@dimen/padding_small"> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="AC" 
      android:textColor="@color/white" /> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="Sleeper" 
      android:textColor="@color/white" /> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="Premium" 
      android:textColor="@color/white" /> 

    </LinearLayout> 


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

fragment.xml (यहाँ मैं putted था मेरी recyclerview कोड)

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@color/white" 
    android:orientation="vertical"> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" 
     android:paddingBottom="@dimen/padding_small" 
     android:paddingTop="@dimen/padding_small" 
     android:weightSum="1"> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:background="@drawable/bg_srp_sorter" 
      android:clickable="true" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="Departure" /> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:background="@drawable/bg_srp_sorter" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="Duration" /> 

     <TextView 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.33" 
      android:gravity="center" 
      android:paddingBottom="@dimen/padding_small" 
      android:paddingTop="@dimen/padding_small" 
      android:text="Price" /> 

    </LinearLayout> 

    <View 
     android:layout_width="match_parent" 
     android:layout_height="1dp" 
     android:background="@color/lite_gray"></View> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:weightSum="1"> 

     <android.support.v7.widget.RecyclerView 
      android:id="@+id/bus_list_recycler_view" 
      android:layout_width="match_parent" 
      android:layout_height="0dp" 
      android:layout_weight="1" /> 

    </LinearLayout> 
</LinearLayout> 

toolbar.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.Toolbar 

xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/toolbar" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="@color/colorPrimary" 
    app:layout_scrollFlags="scroll|enterAlways" 
    android:minHeight="?attr/actionBarSize"> 


    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:weightSum="1"> 

     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.10"> 

      <ImageView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:src="@drawable/abc_ic_ab_back_mtrl_am_alpha" /> 


     </LinearLayout> 


     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.78" 
      android:orientation="vertical"> 

      <LinearLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:orientation="horizontal" 
       android:weightSum="1"> 

       <TextView 
        android:id="@+id/toolbar_title_source" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="0.47" 
        android:ellipsize="end" 
        android:singleLine="true" 
        android:text="Thiruvananthapuram " 
        android:textColor="@color/white" 
        android:textSize="@dimen/label_text_size_large" /> 

       <TextView 
        android:id="@+id/toolbar_title_arrow" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="0.08" 
        android:text="@string/char_right" 
        android:textColor="@color/white" 
        android:textSize="@dimen/label_text_size_large" 
        android:textStyle="bold" /> 

       <TextView 
        android:id="@+id/toolbar_title_destination" 
        android:layout_width="0dp" 
        android:layout_height="wrap_content" 
        android:layout_weight="0.47" 
        android:ellipsize="end" 
        android:singleLine="true" 
        android:text=" Cochin" 
        android:textColor="@color/white" 
        android:textSize="@dimen/label_text_size_large" /> 


      </LinearLayout> 


      <TextView 
       android:id="@+id/toolbar_sub_title" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:text="2 Seat(s)" 
       android:textColor="@color/lite_gray" 
       android:textSize="@dimen/label_text_size_normal" /> 

     </LinearLayout> 


     <LinearLayout 
      android:layout_width="0dp" 
      android:layout_height="wrap_content" 
      android:layout_weight="0.13"> 

      <ImageView 
       android:layout_width="30dp" 
       android:layout_height="30dp" 
       android:scaleType="fitCenter" 
       android:src="@drawable/filter" /> 
     </LinearLayout> 
    </LinearLayout> 

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

Answer 1

जब से तुम CoordinatorLayout उपयोग कर रहे हैं आप एक कस्टम Behaviour प्राप्त कर सकते हैं कि आप क्या नीचे दिए गए उदाहरण का पालन अनुरोध किया बना सकते हैं: create एक वर्ग है कि नीचे दिए गए उदाहरण का पालन करें extends CoordinatorLayout.Behavior<View>:

public class QuickReturnFloaterBehavior extends CoordinatorLayout.Behavior<View> { 

    private int distance; 

    public QuickReturnFloaterBehavior(Context context, AttributeSet attrs) { 
     super(context, attrs); 
    } 

    @Override 
    public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) { 
     return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0; 
    } 

    @Override public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, View child, View target, int dx, int dy, int[] consumed) { 
     if (dy > 0 && distance < 0 || dy < 0 && distance > 0) { 
      child.animate().cancel(); 
      distance = 0; 
     } 
     distance += dy; 
     final int height = child.getHeight() > 0 ? (child.getHeight()) : 600/*update this accordingly*/; 
     if (distance > height && child.isShown()) { 
      hide(child); 
     } else if (distance < 0 && !child.isShown()) { 
      show(child); 
     } 
    } 

    private void hide(View view) { 
     view.setVisibility(View.GONE);// use animate.translateY(height); instead 
    } 

    private void show(View view) { 
     view.setVisibility(View.VISIBLE);// use animate.translateY(-height); instead 
    } 

} 

अब लागू करने के लिए इस behaviour में जोड़ना अपने लेआउट

app:layout_behavior="com.example.QuickReturnFloaterBehavior" 

Answer 2

इस तरह मैंने किया:

mRecylerView.addOnScrollListener(new HideShowScrollListener() { 
      @Override 
      public void onHide() { 
       //fab.animate().setInterpolator(new AccelerateDecelerateInterpolator()).scaleX(0).scaleY(0); 
       // do your hiding animation here 

      } 

      @Override 
      public void onShow() { 
       // fab.animate().setInterpolator(new AccelerateDecelerateInterpolator()).scaleX(1).scaleY(1); 
       // do your showing animation here 
      } 
     }); 

आप HideShowScrollListener.class

/** 
* This class is a ScrollListener for RecyclerView that allows to show/hide 
* views when list is scrolled. 
* */ 
public abstract class HideShowScrollListener extends RecyclerView.OnScrollListener { 
    private static final int HIDE_THRESHOLD = 20; 
    private int scrolledDistance = 0; 
    private boolean controlsVisible = true; 

    @Override 
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
     super.onScrolled(recyclerView, dx, dy); 

     if (scrolledDistance > HIDE_THRESHOLD && controlsVisible) { 
      onHide(); 
      controlsVisible = false; 
      scrolledDistance = 0; 
     } else if (scrolledDistance < -HIDE_THRESHOLD && !controlsVisible) { 
      onShow(); 
      controlsVisible = true; 
      scrolledDistance = 0; 
     } 

     if((controlsVisible && dy>0) || (!controlsVisible && dy<0)) { 
      scrolledDistance += dy; 
     } 
    } 

    public abstract void onHide(); 
    public abstract void onShow(); 

} 

Answer 3

public class ScrollAwareFABBehavior extends FloatingActionButton.Behavior { 
    private static final Interpolator INTERPOLATOR = new FastOutSlowInInterpolator(); 
    private boolean mIsAnimatingOut = false; 
public ScrollAwareFABBehavior(Context context, AttributeSet attrs) { 
    super(); 
} 

@Override 
public boolean onStartNestedScroll(final CoordinatorLayout coordinatorLayout, final FloatingActionButton child, 
            final View directTargetChild, final View target, final int nestedScrollAxes) { 
    // Ensure we react to vertical scrolling 
    return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL 
      || super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes); 
} 

@Override 
public void onNestedScroll(final CoordinatorLayout coordinatorLayout, final FloatingActionButton child, 
          final View target, final int dxConsumed, final int dyConsumed, 
          final int dxUnconsumed, final int dyUnconsumed) { 
    super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed); 
    if (dyConsumed > 0 && !this.mIsAnimatingOut && child.getVisibility() == View.VISIBLE) { 
     // User scrolled down and the FAB is currently visible -> hide the FAB 
     animateOut(child); 
    } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) { 
     // User scrolled up and the FAB is currently not visible -> show the FAB 
     animateIn(child); 
    } 
} 

// Same animation that FloatingActionButton.Behavior uses to hide the FAB when the AppBarLayout exits 
private void animateOut(final FloatingActionButton button) { 
    if (Build.VERSION.SDK_INT >= 14) { 
     ViewCompat.animate(button).scaleX(0.0F).scaleY(0.0F).alpha(0.0F).setInterpolator(INTERPOLATOR).withLayer() 
       .setListener(new ViewPropertyAnimatorListener() { 
        public void onAnimationStart(View view) { 
         ScrollAwareFABBehavior.this.mIsAnimatingOut = true; 
        } 

        public void onAnimationCancel(View view) { 
         ScrollAwareFABBehavior.this.mIsAnimatingOut = false; 
        } 

        public void onAnimationEnd(View view) { 
         ScrollAwareFABBehavior.this.mIsAnimatingOut = false; 
         view.setVisibility(View.GONE); 
        } 
       }).start(); 
    } else { 
     Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_out); 
     anim.setInterpolator(INTERPOLATOR); 
     anim.setDuration(200L); 
     anim.setAnimationListener(new Animation.AnimationListener() { 
      public void onAnimationStart(Animation animation) { 
       ScrollAwareFABBehavior.this.mIsAnimatingOut = true; 
      } 

      public void onAnimationEnd(Animation animation) { 
       ScrollAwareFABBehavior.this.mIsAnimatingOut = false; 
       button.setVisibility(View.GONE); 
      } 

      @Override 
      public void onAnimationRepeat(final Animation animation) { 
      } 
     }); 
     button.startAnimation(anim); 
    } 
} 

// Same animation that FloatingActionButton.Behavior uses to show the FAB when the AppBarLayout enters 
private void animateIn(FloatingActionButton button) { 
    button.setVisibility(View.VISIBLE); 
    if (Build.VERSION.SDK_INT >= 14) { 
     ViewCompat.animate(button).scaleX(1.0F).scaleY(1.0F).alpha(1.0F) 
       .setInterpolator(INTERPOLATOR).withLayer().setListener(null) 
       .start(); 
    } else { 
     Animation anim = AnimationUtils.loadAnimation(button.getContext(), R.anim.fab_in); 
     anim.setDuration(200L); 
     anim.setInterpolator(INTERPOLATOR); 
     button.startAnimation(anim); 
    } 
} 

}

और आप एक्सएमएल एप्लिकेशन सेट की आवश्यकता होगी, की जाएगी: layout_behavior की तरह ..

<android.support.design.widget.FloatingActionButton 
    android:id="@+id/fab" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="end|bottom" 
    android:layout_margin="16dp" 
    app:fabSize="mini" 
    android:src="@drawable/ic_action_edit" 
    app:layout_behavior="com.package.name.ScrollAwareFABBehavior"/> 

Answer 4

@ k0sh जुर्माना समाधान दिया । लेआउट को दिखाते हुए और छुपाते समय मैं एक चिकनी एनीमेशन प्राप्त करने के लिए इसे अपडेट करना चाहता हूं।नीचे दिए गए कोड के साथ onNestedPreScroll() के अंदर पूरा कोड बदलें:

if (dy > 0) { 

     CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) child.getLayoutParams(); 
     int viewBottomMargin = layoutParams.bottomMargin; 
     child.animate().translationY(child.getHeight() + viewBottomMargin).setInterpolator(new LinearInterpolator()).start(); 

} else if (dy < 0) { 

     child.animate().translationY(0).setInterpolator(new LinearInterpolator()).start(); 

} 

Answer 5

दृश्यता और आपका टुकड़ा में एनीमेशन के साथ छिपाएं:

recyclerView.addOnScrollListener(new HideShowScrollListener() { 
     final Fragment parentFragment = getParentFragment(); 
     @Override 
     public void onHide() { 
      bottomLayout.animate().setDuration(200).translationYBy(-bottomLayout.getHeight()).setListener(new AnimatorListenerAdapter() { 
        @Override 
        public void onAnimationEnd(Animator animation) { 
         bottomLayout.setVisibility(View.GONE); 
        } 
      }); 
     } 

     @Override 
     public void onShow() { 
      bottomLayout.animate().setDuration(200).translationY(0).setListener(new AnimatorListenerAdapter() { 
        @Override 
        public void onAnimationEnd(Animator animation) { 
         bottomLayout.setVisibility(View.VISIBLE); 
        } 
      }); 
     } 

     @Override 
     public void onScrolled() { 
      // To load more data 
     } 
    }); 

HideShowScrollListener.java

public abstract class HideShowScrollListener extends RecyclerView.OnScrollListener { 
     private static final int HIDE_THRESHOLD = 20; 
     private int scrolledDistance = 0; 
     private boolean controlsVisible = true; 

     @Override 
     public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
      super.onScrolled(recyclerView, dx, dy); 

      onScrolled(); 

      if (scrolledDistance > HIDE_THRESHOLD && controlsVisible) { 
       onHide(); 
       controlsVisible = false; 
       scrolledDistance = 0; 
      } else if (scrolledDistance < -HIDE_THRESHOLD && !controlsVisible) { 
       onShow(); 
       controlsVisible = true; 
       scrolledDistance = 0; 
      } 

      if((controlsVisible && dy>0) || (!controlsVisible && dy<0)) { 
       scrolledDistance += dy; 
      } 
     } 

     public abstract void onHide(); 
     public abstract void onShow(); 
     public abstract void onScrolled(); 
} 

Answer 6

@ k0sh का QuickReturnFloaterBehavior काम करता है लेकिन कभी-कभी मामूली स्क्रॉल नहीं सुनता है।

मेरे पास NestedScrollView में LinearLayout के साथ एक निचली बार & के साथ रीसाइक्लिंग दृश्य नहीं था। इसलिए, मैं अन्य सुझाए गए उत्तरों का उपयोग नहीं कर सकता।

जो लोग एक ही स्थिति रखते हैं इस पोस्ट से BottomNavigationBehavior का उपयोग कर सकते हैं। यह पूरी तरह से & उपयोगी काम करता है।

वर्तमान उच्च स्तर का परिदृश्य एक स्क्रॉल सामग्री है, तो नीचे नेविगेशन जब यह नीचे स्क्रॉल किया है छिपाने के लिए और वापस वापस लेना जब सामग्री को स्क्रॉल किया है चाहिए। इस उद्देश्य के लिए, हमें स्क्रॉल की दिशा से अवगत होना चाहिए। VerticalScrollingBehavior एक सामान्य लेआउट व्यवहार है कि यह किसी भी तरह कोऑर्डिनेटरलाउटआउट का विस्तार है। व्यवहार जो स्क्रॉलिंग की दिशा के लिए ईवेंट भेजता है। BottomNavigationBehavior के लिए

स्रोत कोड - https://gist.github.com/NikolaDespotoski/1d6fef4949eb9be05a46#file-bottomnavigationbehavior-java

टुकड़ा से BottomNavigationBehavior

@Override 
public void onDirectionNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed, @ScrollDirection int scrollDirection) { 
    handleDirection(child, scrollDirection); 
} 

@Override 
protected boolean onNestedDirectionFling(CoordinatorLayout coordinatorLayout, V child, View target, float velocityX, float velocityY, @ScrollDirection int scrollDirection) { 
    handleDirection(child, scrollDirection); 
    return true; 
} 

private void handleDirection(V child, @ScrollDirection int scrollDirection) { 
    if (!scrollingEnabled) return; 
    if (scrollDirection == ScrollDirection.SCROLL_DIRECTION_DOWN && hidden) { 
     hidden = false; 
     animateOffset(child, 0); 
    } else if (scrollDirection == ScrollDirection.SCROLL_DIRECTION_UP && !hidden) { 
     hidden = true; 
     animateOffset(child, child.getHeight()); 
    } 
} 

Answer 7

package com.keshav.hideactionbarandfooterexample; 

import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.support.v7.widget.Toolbar; 
import android.util.Log; 
import android.view.View; 
import android.view.animation.AccelerateInterpolator; 
import android.view.animation.DecelerateInterpolator; 
import android.widget.FrameLayout; 
import android.widget.ImageButton; 

import java.util.ArrayList; 
import java.util.List; 

import adapters.RecyclerAdapter; 
import listners.HidingScrollListener; 

public class MainActivity extends AppCompatActivity { 

    private Toolbar mToolbar; 
    private Toolbar toolbar_bottom; 
    private ImageButton mFabButton; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     setTheme(R.style.AppThemeRed); 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     Log.e("keshav", "MainActivity called"); 

     initToolbar(); 
     mFabButton = (ImageButton) findViewById(R.id.fabButton); 
     initRecyclerView(); 
    } 

    private void initToolbar() { 
     mToolbar = (Toolbar) findViewById(R.id.toolbar); 
     toolbar_bottom = (Toolbar) findViewById(R.id.toolbar_bottom); 
     setSupportActionBar(mToolbar); 
     setSupportActionBar(toolbar_bottom); 
     setTitle(getString(R.string.app_name)); 
     mToolbar.setTitleTextColor(getResources().getColor(android.R.color.white)); 
     toolbar_bottom.setTitleTextColor(getResources().getColor(android.R.color.white)); 


     toolbar_bottom.setVisibility(View.GONE); 
    } 

    private void initRecyclerView() { 
     RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerView); 
     recyclerView.setLayoutManager(new LinearLayoutManager(this)); 
     RecyclerAdapter recyclerAdapter = new RecyclerAdapter(createItemList()); 
     recyclerView.setAdapter(recyclerAdapter); 

     recyclerView.addOnScrollListener(new HidingScrollListener() { 
      @Override 
      public void onHide() { 
       hideViews(); 
      } 

      @Override 
      public void onShow() { 
       showViews(); 
      } 
     }); 
    } 

    private void hideViews() { 
     // TODO (-mToolbar) plus means 2 view above ho jaye or not visible to user 
     mToolbar.animate().translationY(-mToolbar.getHeight()).setInterpolator(new AccelerateInterpolator(2)); 

     // TODO uncomment this Hide Footer in android when Scrolling 
     // TODO (+mToolbar) plus means 2 view forward ho jaye or not visible to user 
     toolbar_bottom.animate().translationY(+toolbar_bottom.getHeight()).setInterpolator(new AccelerateInterpolator(2)); 

     // TODO keshav Hide Also Floatng Button In Android 
     FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) mFabButton.getLayoutParams(); 
     int fabBottomMargin = lp.bottomMargin; 
     mFabButton.animate().translationY(mFabButton.getHeight() + fabBottomMargin).setInterpolator(new AccelerateInterpolator(2)).start(); 
     // TODO keshav Hide Also Floatng Button In Android 
    } 

    private void showViews() { 
     mToolbar.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)); 

     // TODO uncomment this Hide Footer in android when Scrolling 
     toolbar_bottom.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)); 
     mFabButton.animate().translationY(0).setInterpolator(new DecelerateInterpolator(2)).start(); 
    } 

    private List<String> createItemList() { 
     List<String> itemList = new ArrayList<>(); 
     for (int i = 0; i < 20; i++) { 
      itemList.add("Item " + i); 
     } 
     return itemList; 
    } 
} 

============================================= 
      RecyclerAdapter 
============================================= 
package adapters; 

import android.content.Context; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 

import com.keshav.hideactionbarandfooterexample.R; 

import java.util.List; 

/* 
* RecyclerView Adapter that allows to add a header view. 
* */ 
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    private static final int TYPE_HEADER = 2; 
    private static final int TYPE_ITEM = 1; 
    private List<String> mItemList; 

    public RecyclerAdapter(List<String> itemList) { 
     mItemList = itemList; 
    } 

    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     Context context = parent.getContext(); 
     if (viewType == TYPE_ITEM) { 
      final View view = LayoutInflater.from(context).inflate(R.layout.recycler_item, parent, false); 
      return RecyclerItemViewHolder.newInstance(view); 
     } else if (viewType == TYPE_HEADER) { 
      final View view = LayoutInflater.from(context).inflate(R.layout.recycler_header, parent, false); 
      return new RecyclerHeaderViewHolder(view); 
     } 
     throw new RuntimeException("There is no type that matches the type " + viewType + " + make sure your using types correctly"); 
    } 

    @Override 
    public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) { 
     if (!isPositionHeader(position)) { 
      RecyclerItemViewHolder holder = (RecyclerItemViewHolder) viewHolder; 
      String itemText = mItemList.get(position - 1); // header 
      holder.setItemText(itemText); 
     } 
    } 

    public int getBasicItemCount() { 
     return mItemList == null ? 0 : mItemList.size(); 
    } 


    @Override 
    public int getItemViewType(int position) { 
     if (isPositionHeader(position)) { 
      return TYPE_HEADER; 
     } 

     return TYPE_ITEM; 
    } 

    @Override 
    public int getItemCount() { 
     return getBasicItemCount() + 1; // header 
    } 

    private boolean isPositionHeader(int position) { 
     return position == 0; 
    } 

} 

===================================================== 
     RecyclerHeaderViewHolder 
===================================================== 
package adapters; 

import android.support.v7.widget.RecyclerView; 
import android.view.View; 

public class RecyclerHeaderViewHolder extends RecyclerView.ViewHolder { 
    public RecyclerHeaderViewHolder(View itemView) { 
     super(itemView); 
    } 
} 

===================================================== 
       RecyclerItemViewHolder 
===================================================== 

package adapters; 

import android.support.v7.widget.RecyclerView; 
import android.view.View; 
import android.widget.TextView; 

import com.keshav.hideactionbarandfooterexample.R; 


public class RecyclerItemViewHolder extends RecyclerView.ViewHolder { 

    private final TextView mItemTextView; 

    public RecyclerItemViewHolder(final View parent, TextView itemTextView) { 
     super(parent); 
     mItemTextView = itemTextView; 
    } 

    public static RecyclerItemViewHolder newInstance(View parent) { 
     TextView itemTextView = (TextView) parent.findViewById(R.id.itemTextView); 
     return new RecyclerItemViewHolder(parent, itemTextView); 
    } 

    public void setItemText(CharSequence text) { 
     mItemTextView.setText(text); 
    } 

} 

=================================================== 
      activity_main.xml 
=================================================== 

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
       android:layout_width="match_parent" 
       android:layout_height="match_parent"> 

    <android.support.v7.widget.RecyclerView 
      android:id="@+id/recyclerView" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"/> 

    <android.support.v7.widget.Toolbar 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="?attr/actionBarSize" 
      android:background="?attr/colorPrimary"/> 

    <ImageButton 
      android:id="@+id/fabButton" 
      android:layout_width="56dp" 
      android:layout_height="56dp" 
      android:layout_gravity="bottom|right" 
      android:layout_marginBottom="16dp" 
      android:layout_marginRight="16dp" 
      android:background="@drawable/fab_bcg" 
      android:src="@drawable/ic_favorite_outline_white_24dp" 
      android:contentDescription="@string/fab_description"/> 


    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"> 

    <android.support.v7.widget.Toolbar 
     android:id="@+id/toolbar_bottom" 
     android:layout_width="match_parent" 
     android:layout_alignParentBottom="true" 
     android:layout_height="?attr/actionBarSize" 
     android:background="?attr/colorPrimary"/> 

    </RelativeLayout> 

</FrameLayout> 


================================================== 
    recycle_header.xml in layout folder 
================================================== 

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

================================================== 
    recycle_item.xml in layout folder 
================================================== 
<?xml version="1.0" encoding="utf-8"?> 
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:card_view="http://schemas.android.com/apk/res-auto" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center" 
    android:layout_margin="8dp" 
    card_view:cardCornerRadius="4dp"> 
    <TextView 
     android:id="@+id/itemTextView" 
     android:layout_width="match_parent" 
     android:layout_height="?attr/listPreferredItemHeight" 
     android:gravity="center_vertical" 
     android:padding="8dp" 
     style="@style/Base.TextAppearance.AppCompat.Body2"/> 
</android.support.v7.widget.CardView> 


================================================= 
         styles.xml 
================================================= 
<resources> 

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> 
    </style> 

    <style name="AppThemeRed" parent="AppTheme"> 
     <item name="colorPrimary">@color/color_primary_red</item> 
     <item name="colorPrimaryDark">@color/color_primary_red_dark</item> 
    </style> 

    <style name="AppThemeGreen" parent="AppTheme"> 
     <item name="colorPrimary">@color/color_primary_green</item> 
     <item name="colorPrimaryDark">@color/color_primary_green_dark</item> 
    </style> 

    <style name="AppThemeBlue" parent="AppTheme"> 
     <item name="colorPrimary">@color/color_primary_blue</item> 
     <item name="colorPrimaryDark">@color/color_primary_blue_dark</item> 
     <item name="colorAccent">@color/color_accent_pink</item> 
    </style> 

</resources> 

build.gradle निर्भरता

compile 'com.android.support:appcompat-v7:25.3.1' 
    compile 'com.android.support:recyclerview-v7:25.3.1' 
    compile 'com.android.support:cardview-v7:25.3.1' 
    compile 'com.android.support:design:25.3.1'