CODEWITHSUNDEEP
androidscrollfloating-action-button
Mulgard
Mulgard

Reputation: 10609

FloatingActionButton hide on list scroll

Im using the FloatingActionButton from the android.support.design.widget package:

<android.support.design.widget.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentEnd="true"
    android:layout_marginBottom="20dp"
    android:layout_marginEnd="16dp"
    android:clickable="true"
    android:backgroundTint="@color/primaryColor"
    android:src="@drawable/ic_search_white_24dp"
    app:borderWidth="0dp"
    app:elevation="6dp"
    app:backgroundTint="@color/primaryColorDark"
    app:rippleColor="@color/accentColor" />

Is it possible to configure that button to hide with an animation when the listview is scrolling down and to show it again when listview is scrolling up to the top?

Upvotes: 63

Views: 97014

Answers (14)

ganjaam
ganjaam

Reputation: 1284

Just to add, for NestedScrollView the approach will be something like the following:

        // register the extended floating action Button
        final ExtendedFloatingActionButton extendedFloatingActionButton = findViewById(R.id.extFloatingActionButton);
  
        // register the nestedScrollView from the main layout
        NestedScrollView nestedScrollView = findViewById(R.id.nestedScrollView);
  
        // handle the nestedScrollView behaviour with OnScrollChangeListener
        // to extend or shrink the Extended Floating Action Button
        nestedScrollView.setOnScrollChangeListener(new NestedScrollView.OnScrollChangeListener() {
            @Override
            public void onScrollChange(NestedScrollView v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {
                // the delay of the extension of the FAB is set for 12 items
                if (scrollY > oldScrollY + 12 && extendedFloatingActionButton.isExtended()) {
                    extendedFloatingActionButton.shrink();
                }
  
                // the delay of the extension of the FAB is set for 12 items
                if (scrollY < oldScrollY - 12 && !extendedFloatingActionButton.isExtended()) {
                    extendedFloatingActionButton.extend();
                }
  
                // if the nestedScrollView is at the first item of the list then the
                // extended floating action should be in extended state
                if (scrollY == 0) {
                    extendedFloatingActionButton.extend();
                }
            }
        });

I've taken this code from GeeksForGeeks

Upvotes: 0

Jagadish Nallappa
Jagadish Nallappa

Reputation: 842

Sorry! I am late by years to answer this. I hope this still helps someone. This is also my first answer.

Mates! No need to implement scroll listeners.

Add the following to the floating action button xml:

app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"

giving:

<com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
        android:id="@+id/fabAddOItransferIn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="@dimen/fab_margin"
        android:text="@string/btn_text_transfer_in"
        app:icon="@android:drawable/ic_input_add"
        app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

In response to the following comment of mine, "Sorry! I just noticed this has a weird side effect. Any snackbars will overlap this floating action button if app:layout_behavior="com.google.android.material.behavior.HideBottomViewOnScrollBehavior is added. ☹️ Taking this line off will prevent the overlap and the floating action button will behave as it is intended to inside the coordinator layout. "

To counter this, do use the following:

Snackbar.make(floating_action_button, "Some snackbar text!", BaseTransientBottomBar.LENGTH_SHORT).setAnchorView(floating_action_button).show();

Upvotes: 79

Nithin
Nithin

Reputation: 5840

Another method for recycleView using kotlin extensions.

fun RecyclerView.attachFab(fab : FloatingActionButton) {
    this.addOnScrollListener(object : RecyclerView.OnScrollListener(){
        override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
            super.onScrolled(recyclerView, dx, dy)
            if (dy > 0)
                fab.hide()
            else if (dy < 0)
                fab.show()
        }
    })
}

Now you can attach fab to any recycleView with:

rv.attachFab(requireActivity().fab)
// in my case i made fab public on activity

Upvotes: 5

user11902704
user11902704

Reputation:

for Kotlin it is very simple (API 23+)

myRecyclerView.setOnScrollChangeListener { _, _, _, _, oldScrollY ->
    if (oldScrollY < 0) myFAB.hide() else myFAB.show()
}

Upvotes: 3

Jesus Dimrix
Jesus Dimrix

Reputation: 4568

Kotlin + DataBinding Adapter

@BindingAdapter("bindAdapter:attachFloatingButton")
fun bindRecyclerViewWithFB(recyclerView: RecyclerView, fb: FloatingActionButton) {
    recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
        override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
            super.onScrolled(recyclerView, dx, dy)

            if (dy > 0 && fb.isShown) {
                fb.hide()
            } else if (dy < 0 && !fb.isShown) {
                fb.show()
            }
        }
    })
}

and the xml

    <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/main_recyclerview"
            android:layout_width="match_parent"
            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
            android:layout_height="wrap_content"
            android:clipToPadding="false"
            android:paddingBottom="8dp" app:layout_constraintEnd_toEndOf="parent" android:layout_marginEnd="8dp"
            app:layout_constraintStart_toStartOf="parent" android:layout_marginStart="8dp"
            android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="@+id/main_chips"
            android:layout_marginBottom="8dp"
            **bindAdapter:attachFloatingButton="@{mainFb}"**
            app:layout_constraintBottom_toBottomOf="parent" 
            app:layout_constraintVertical_bias="0.0"/>


    <com.google.android.material.floatingactionbutton.ExtendedFloatingActionButton
            android:id="@+id/main_fb"
            android:layout_width="wrap_content"
            app:layout_constraintBottom_toBottomOf="parent"
            style="@style/Widget.Design.FloatingActionButton"
            app:layout_constraintEnd_toEndOf="parent"
            android:layout_height="wrap_content"
            android:layout_margin="18dp"
            android:background="@color/colorPrimaryDark"
            app:icon="@drawable/ic_add_black_24dp"/>

Upvotes: 4

Irfan Raza
Irfan Raza

Reputation: 2963

Those who are looking to make it with recyclerview can do this:

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        if (dy > 0 || dy < 0 && fab.isShown())
            fab.hide();
    }

    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        if (newState == RecyclerView.SCROLL_STATE_IDLE)
            fab.show();
        super.onScrollStateChanged(recyclerView, newState);
    }
});

Upvotes: 77

Elias Meireles
Elias Meireles

Reputation: 1058

There is my code in kotlin.

class ScrollAwareFABBehavior (val recyclerView: RecyclerView, val floatingActionButton: FloatingActionButton) {

    fun start() {
        recyclerView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
            override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
                super.onScrolled(recyclerView, dx, dy)

                if (dy > 0) {
                    if (floatingActionButton!!.isShown) {
                        floatingActionButton?.hide()
                    }
                } else if (dy < 0) {
                    if (!floatingActionButton!!.isShown) {
                        floatingActionButton?.show()
                    }
                }
            }
        })
    }
}

Now, you just need to call the ScrollAwareFABBehavior with the recyclerView and the fab on constructor, then call method start().

ScrollAwareFABBehavior(recyclerView = recyclerViewPlaceFormContainer, floatingActionButton = floatingActionButton).start()

Upvotes: 5

Abdul Rizwan
Abdul Rizwan

Reputation: 4108

using this class you can easily animate you FAB, here I have implemented onStopNestedScroll() method to show your Fab whenever scroll stop. I set 1000 miliSeconds as delay using Handler();

public class FabBehaviour extends CoordinatorLayout.Behavior<FloatingActionButton> {
    private static final String TAG = "ScrollingFABBehavior";
    Handler mHandler;

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

    public FabBehaviour() {
        super();
    }

    @Override
    public void onStopNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull final FloatingActionButton child, @NonNull View target, int type) {
        super.onStopNestedScroll(coordinatorLayout, child, target, type);
        if (mHandler == null)
            mHandler = new Handler();


        mHandler.postDelayed(new Runnable() {
            @Override
            public void run() {
                child.animate().translationY(0).setInterpolator(new LinearInterpolator()).start();
                Log.d("FabAnim", "startHandler()");
            }
        }, 1000);
    }

    @Override
    public void onNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull FloatingActionButton child, @NonNull View target, int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type);
        if (dyConsumed > 0) {
            Log.d("Scrolling", "Up");
            CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) child.getLayoutParams();
            int fab_bottomMargin = layoutParams.bottomMargin;
            child.animate().translationY(child.getHeight() + fab_bottomMargin).setInterpolator(new LinearInterpolator()).start();
        } else if (dyConsumed < 0) {
            Log.d("Scrolling", "down");
            child.animate().translationY(0).setInterpolator(new LinearInterpolator()).start();
        }
    }

    @Override
    public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull FloatingActionButton child, @NonNull View directTargetChild, @NonNull View target, int axes, int type) {
        if (mHandler != null) {
            mHandler.removeMessages(0);
            Log.d("Scrolling", "stopHandler()");
        }
        return axes == ViewCompat.SCROLL_AXIS_VERTICAL;
    }


}

your_layout.xml

<android.support.design.widget.FloatingActionButton
        android:id="@+id/imageViewYes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end|right"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_yes"
        app:backgroundTint="@color/white"
        android:scaleType="center"
        app:elevation="6dp"
        app:fabSize="normal"
        app:layout_behavior="com.your.package.FabBehaviour"
        app:pressedTranslationZ="12dp"
        app:rippleColor="@color/gray" />

Upvotes: 9

Seven
Seven

Reputation: 3262

A small improvement to the code from Irfan Raza:

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener(){
        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy){
            if (dy<0 && !fab.isShown())
                fab.show();
            else if(dy>0 && fab.isShown())
                fab.hide();
        }

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
            super.onScrollStateChanged(recyclerView, newState);
        }
    });

The Floating Action Button hides when scrolling down and shows when scrolling up.

Upvotes: 29

Naveen Kumar M
Naveen Kumar M

Reputation: 7557

Here I am adding extra padding for last view item to avoid overlapping list item with floating action button

I used this in a RecyclerView.Adapter's onBindViewHolder method to set the bottom margin of the last item in the list to 72dp so that it will scroll up above the floating action button.

This does not require a dummy entry in the list.

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    // other binding code goes here.

    if (position + 1 == getItemCount()) {
        // set bottom margin to 72dp.
        setBottomMargin(holder.itemView, (int) (72 * Resources.getSystem().getDisplayMetrics().density));
    } else {
        // reset bottom margin back to zero. (your value may be different)
        setBottomMargin(holder.itemView, 0);
    }
}

public static void setBottomMargin(View view, int bottomMargin) {
    if (view.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
        ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
        params.setMargins(params.leftMargin, params.topMargin, params.rightMargin, bottomMargin);
        view.requestLayout();
    }
}

Upvotes: 4

Suraj Vaishnav
Suraj Vaishnav

Reputation: 8315

mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
    super.onScrolled(recyclerView, dx, dy);
    if (dy > 0 && mFloatingActionButton.getVisibility() == View.VISIBLE) {
        mFloatingActionButton.hide();
    } else if (dy < 0 && mFloatingActionButton.getVisibility() != View.VISIBLE) {
        mFloatingActionButton.show();
    }
}});

Upvotes: 2

Syed Ali Naqi
Syed Ali Naqi

Reputation: 701

See this. Here it tells how to do what you are trying to achieve. You have to use it like this in a CoordinatorLayout and ListView :

<android.support.design.widget.CoordinatorLayout
    android:id="@+id/main_content"
    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">

          <ListView
              android:id="@+id/lvToDoList"
              android:layout_width="match_parent"
              android:layout_height="match_parent"></ListView>

          <android.support.design.widget.FloatingActionButton
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:layout_gravity="bottom|right"
              android:layout_margin="16dp"
              android:src="@drawable/ic_done"
              app:layout_anchor="@id/lvToDoList"
              app:layout_anchorGravity="bottom|right|end" />

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

Upvotes: 26

muni
muni

Reputation: 81

hey there is o require to take the recyclerview for auto hiding the floating action button on scrolling down for this purpose we can use default listview with floating action button in normal way only make modifications on listview.onscroll listener then we can get feel like recycle

 listview.setOnScrollListener(new AbsListView.OnScrollListener() {
        @Override
        public void onScrollStateChanged(AbsListView view, int scrollState) {


        }

        @Override
        public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

            int lastItem = firstVisibleItem + visibleItemCount;
            if (lastItem == totalItemCount) {

                fab.setVisibility(View.INVISIBLE);
            }else {
                fab.setVisibility(View.VISIBLE);
            }
        }
    });

Upvotes: 8

PravinDodia
PravinDodia

Reputation: 3290

According to me the best way to implement this would be as below.

public class ScrollingFABBehavior extends FloatingActionButton.Behavior {


private static final String TAG = "ScrollingFABBehavior";

public ScrollingFABBehavior(Context context, AttributeSet attrs) {
    super();
    // Log.e(TAG, "ScrollAwareFABBehavior");
}


public boolean onStartNestedScroll(CoordinatorLayout parent, FloatingActionButton child, View directTargetChild, View target, int nestedScrollAxes) {

    return true;
}

@Override
public boolean layoutDependsOn(CoordinatorLayout parent, FloatingActionButton child, View dependency) {
    if (dependency instanceof RecyclerView)
        return true;

    return false;
}

@Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout,
                           FloatingActionButton child, View target, int dxConsumed,
                           int dyConsumed, int dxUnconsumed, int dyUnconsumed) {
    // TODO Auto-generated method stub
    super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed,
            dxUnconsumed, dyUnconsumed);
    //Log.e(TAG, "onNestedScroll called");
    if (dyConsumed > 0 && child.getVisibility() == View.VISIBLE) {
     //   Log.e(TAG, "child.hide()");
        child.hide();
    } else if (dyConsumed < 0 && child.getVisibility() != View.VISIBLE) {
      //  Log.e(TAG, "child.show()");
        child.show();
    }
}}

For detailed answer check this out. Hide FloatingActionButton on scroll of RecyclerView

Upvotes: 2

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