How to disable scrolling of AppBarLayout in CoordinatorLayout?

Question

I have MapFragment with parallax effect inside AppBarLayout:

I want to disable scrolling on AppBarLayout, because it is not possible to move across map, since touch evenys on the map are always handled as scroll events. I would like to handle collapsing of AppBarLayout by scrolling RecyclerView only, which is on the bottom of the screen.

This is my xml:

<?xml version="1.0" encoding="utf-8"?>

<android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    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="wrap_content"
        android:fitsSystemWindows="true"
        app:contentScrim="@color/white"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
        app:titleEnabled="false">

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:layout_collapseMode="parallax"
            android:fitsSystemWindows="true">

            <fragment
                android:id="@+id/map"
                android:name="com.androidmapsextensions.SupportMapFragment"
                android:layout_width="match_parent"
                android:layout_height="match_parent" />
        </FrameLayout>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="73dp"
            app:contentInsetLeft="0dp"
            app:contentInsetStart="0dp"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

            <include
                android:id="@+id/search_bar"
                layout="@layout/layout_searchbar" />
        </android.support.v7.widget.Toolbar>

        <View
            android:id="@+id/toolbar_shadow"
            android:layout_width="match_parent"
            android:layout_height="3dp"
            android:layout_below="@id/search_bar"
            android:layout_gravity="bottom"
            android:background="@drawable/toolbar_dropshadow"
            android:visibility="gone" />
    </android.support.design.widget.CollapsingToolbarLayout>
</android.support.design.widget.AppBarLayout>


<RecyclerView
    android:id="@+id/farm_list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/transparent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

Thank you for the response.

Where is your `CoordinatorLayout`? – Joaquin Iurchuk Jan 12 '16 at 18:46 — Joaquin Iurchuk, Jan 12 '16 at 18:46

score 68 · Accepted Answer · answered Dec 05 '15 at 23:19

68

I'm not sure I got it, but I think you are looking for a DragCallback.

The DragCallback interface allows to choose whether the sibling scrolling view should be controlled by scrolls onto the AppBarLayout.

You can define one by calling:

CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams();
AppBarLayout.Behavior behavior = (AppBarLayout.Behavior) params.getBehavior();
behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
    @Override
    public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
        return false;
    }
});

By always returning false, your scrolling view will not be controlled by the ABL any longer.

Note: before calling this you should check that ViewCompat.isLaidOut(appBarLayout), otherwise params.getBehavior() will return null.

answered Dec 05 '15 at 23:19

natario

24,954
17
88
158

Actually the solution I added above did the trick, but thank you for help anyway. I'm curious so I will give it a try :) – janox1x2x3 Dec 06 '15 at 00:10
2

Setting onInterceptTouchEvent to the coordinator might give you some problem in the future. This is the "official" solution (if I got your question). – natario Dec 06 '15 at 11:09
2

Can't make it work with this solution. Can you explain a little bit more, please? Thanks – Joaquin Iurchuk Jan 12 '16 at 18:52
@joaquin if canDrag returns true, you can scroll the whole view by scrolling the appbarlayout. If canDrag returns false, the appbarlayout does not react to scroll events. – natario Jan 12 '16 at 23:53
2

The "behavior" variable that is returned to me is null. How did you get it to work? – android developer Jun 11 '17 at 14:14
1

i got null while accessing params.getBehavior. This answer (https://stackoverflow.com/a/33230473/6117565) is another way to change behavior and it worked for me: – bikram Mar 19 '18 at 18:28
don't forget about the ''Note" – latifalbr Jan 08 '20 at 01:24

score 40 · Answer 2 · answered Oct 26 '16 at 16:12

Problem

AppBarLayout scrolls even if the scroll content fits the screen.
It is because by default we can drag AppBarLayout by touching & dragging AppBarLayout.

Solution

We will disable "Dragging" behaviour for AppBarLayout.

// Disable "Drag" for AppBarLayout (i.e. User can't scroll appBarLayout by directly touching appBarLayout - User can only scroll appBarLayout by only using scrollContent)
if (appBarLayout.getLayoutParams() != null) {
    CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams();
    AppBarLayout.Behavior appBarLayoutBehaviour = new AppBarLayout.Behavior();
    appBarLayoutBehaviour.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
        @Override
        public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
            return false;
        }
    });
    layoutParams.setBehavior(appBarLayoutBehaviour);
}

Reference

This is just extension of "natario's" accepted answer above.
https://developer.android.com/reference/android/support/design/widget/AppBarLayout.Behavior.DragCallback.html

Hi Vasanth! I want to disable user scroll (of CoordinatorLayout) when he scrolls into the recyclerview. how can I do that please? — anthony, Jan 30 '17 at 12:30

Victor Rendina · Answer 3 · 2018-10-21T20:34:17.960

You can accomplish this by defining a custom app:layout_behavior in xml. With this approach you don't have to worry about getting a reference to the LayoutParams and doing null checks.

  <android.support.design.widget.AppBarLayout
      android:id="@+id/app_bar_layout"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      app:layout_behavior="com.yourcompany.FixedAppBarLayoutBehavior"
      >

Then create a custom class that extends from AppBarLayout.Behavior.

public class FixedAppBarLayoutBehavior extends AppBarLayout.Behavior {

  public FixedAppBarLayoutBehavior(Context context, AttributeSet attrs) {
    super(context, attrs);

    setDragCallback(new DragCallback() {
      @Override public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
        return false;
      }
    });
  }
}

Updated with Kotlin version:

class FixedAppBarLayoutBehavior(context: Context, attrs: AttributeSet) : AppBarLayout.Behavior(context, attrs) {
  init {
    setDragCallback(object : DragCallback() {
      override fun canDrag(appBarLayout: AppBarLayout): Boolean = false
    })
  }
}

score 6 · Answer 4 · answered Dec 05 '15 at 23:07

So after two hours of trying I have found a solution, which is pretty simple. I just needed to extend CoordinatorLayout and override OnInterceptTouchEvent method so the class looks like this:

public class NonTouchableCoordinatorLayout extends CoordinatorLayout {
public NonTouchableCoordinatorLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
    return false;
}

}

score 1 · Answer 5 · answered Oct 24 '17 at 02:10

1

you can use the NestedScrollView.setNestedScrollingEnabled(false) to disable the AppBarLayout nestScroll envent

answered Oct 24 '17 at 02:10

JinJieGoo

21
5

2

you can still scroll/expand appbar by dragging your finger on the appbar area. – Alex Sep 21 '18 at 16:13

How to disable scrolling of AppBarLayout in CoordinatorLayout?

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