Fixed AppBarLayout.Behavior for https://issuetracker.google.com/66996774

FixAppBarLayoutBehavior.java

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package your.package;
 
import android.content.Context;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CoordinatorLayout;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.view.View;

/**
 * Workaround AppBarLayout.Behavior for https://issuetracker.google.com/66996774
 *
 * See https://gist.github.com/chrisbanes/8391b5adb9ee42180893300850ed02f2 for
 * example usage.
 *
 * Change the package name as you wish.
 */
public class FixAppBarLayoutBehavior extends AppBarLayout.Behavior {

    public FixAppBarLayoutBehavior() {
        super();
    }

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

    @Override
    public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target,
            int dxConsumed, int dyConsumed, int dxUnconsumed, int dyUnconsumed, int type) {
        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed,
                dxUnconsumed, dyUnconsumed, type);
        stopNestedScrollIfNeeded(dyUnconsumed, child, target, type);
    }

    @Override
    public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child,
            View target, int dx, int dy, int[] consumed, int type) {
        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type);
        stopNestedScrollIfNeeded(dy, child, target, type);
    }

    private void stopNestedScrollIfNeeded(int dy, AppBarLayout child, View target, int type) {
        if (type == ViewCompat.TYPE_NON_TOUCH) {
            final int currOffset = getTopAndBottomOffset();
            if ((dy < 0 && currOffset == 0)
                    || (dy > 0 && currOffset == -child.getTotalScrollRange())) {
                ViewCompat.stopNestedScroll(target, ViewCompat.TYPE_NON_TOUCH);
            }
        }
    }
}

Usage.java

AppBarLayout abl = findViewById(R.id.app_bar);
((CoordinatorLayout.LayoutParams) abl.getLayoutParams()).setBehavior(new FixAppBarLayoutBehavior());

usage.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.support.design.widget.AppBarLayout
            android:id="@+id/app_bar"
            android:layout_height="..."
            android:layout_width="..."
            app:layout_behavior="your.package.FixAppBarLayoutBehavior">

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

    <!-- Content -->

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

It solves the fling problem but normal ACTION_MOVE does not work on RecyclerView (Horizontal) inside NestedScrollView

thank u

You are genius! Thank you.

It works perfectly, but when I test on older Android like 4.1.1 the problem happens again, the button can't be click and only can scroll half of the screen.

yeah, you can't expect this to be working on such old Android.
For me works good, thanks!

Works perfect to me! Thanks, you saved me

thank you . it works

Nice, thank you man

Amazing ! I lost a lot of time to recognize that it was the appbar... thanks a lot !

Works perfectly to me, thank you very much!

Thanks!!!

Thanks

You saved me :D Thanks!

Thanks!!!

Excellent work! This saved me a lot of headache.

Mantap jiwa..

Works perfect! Thanks

Not working for me on V27.1.1
I've tried both java and xml ways but in vain.
Checked on emulator running on 5.0 and physical device running on 7.1.1
Any ideas ?

Thanks so much i was wondering if there is any solution or not but now i am feeling very lucky thankyou so much

Am having same issue with BottomSheetBehavior, any fix for that?

Why isn't this incorporated in the official release so far? I have a Horizontal recyclerview inside a vertical recyclerview, which is inside a nestedscrollview. I'm now having issues with the usability of the horizontal scroll. It works very different from the Google Play app, which has good UX, I need to know if there's a standard solution for this provided by Android.

@harsha-main I have the same layout with horizontal recycler inside a vertical recycler inside a coordinator layout. One think that fixed my issues with the app bar layout was setting android:nestedScrollEnabled="false" on the horizontal recycler. It fixed our issues with our collapsing header so it might fix your issues.

Thanks!!!

Thanks Chris ! 🙌

Thanks!

Oh God!!!
Finaly!!!
Thanks!!!!

doesn't work for me, crashes!.

Seems to be solved in the latest version of AndroidX dependencies

doesn't work for me