예나아빠_개발

코디네이터레이아웃 사용해서 스크롤시 

툴바 및 리사이클러뷰 스크롤시 최상단 및 최하단 터치 감지가 불량일 때가 있다.

최상단 혹은 최하단 스크롤 후 리스트 항목을 클릭이 되지 않아 두번 클릭해야하는데 

안드로이드 sdk 28에서는 정상동작 한다.

이전 버전에서 AppBarLayout.Behavior 에 버그가 있는듯.

android coordinatorlayout recyclerview scroll click

이렇게 검색하니 스택오버플로우에 올라온 글

Click not working on RecyclerView in CoordinatorLayout when scrolling

게시글 중 해당 링크가 있고 수정된 코드 java와 kotlin이 있음.

https://gist.github.com/chrisbanes/8391b5adb9ee42180893300850ed02f2

수정된 코드소스

java

//////////////////////////////////////////////////////////////////////////////////////////

/**

 * 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);

            }

        }

    }

}

//////////////////////////////////////////////////////////////////////////////////////////

kotlin

//////////////////////////////////////////////////////////////////////////////////////////

/**

 * Workaround AppBarLayout.Behavior for https://issuetracker.google.com/66996774

 *

 *

 * See https://gist.github.com/chrisbanes/8391b5adb9ee42180893300850ed02f2 for

 * example usage.

 *

 * Kotlinised by Erik Huizinga (github: @erikhuizinga).

 */

class FixAppBarLayoutBehavior(context: Context?, attrs: AttributeSet?) :

AppBarLayout.Behavior(context, attrs) {

override fun onNestedScroll(coordinatorLayout: CoordinatorLayout, child: AppBarLayout,

                            target: View, dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int,

                            dyUnconsumed: Int, type: Int) {

super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed,

dyUnconsumed, type)

stopNestedScrollIfNeeded(dyUnconsumed, child, target, type)

}

override fun onNestedPreScroll(coordinatorLayout: CoordinatorLayout, child: AppBarLayout,

                               target: View, dx: Int, dy: Int, consumed: IntArray, type: Int) {

super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type)

stopNestedScrollIfNeeded(dy, child, target, type)

}

private fun stopNestedScrollIfNeeded(dy: Int, child: AppBarLayout, target: View, type: Int) {

if (type == ViewCompat.TYPE_NON_TOUCH) {

val currOffset = topAndBottomOffset

if (dy < 0 && currOffset == 0 || dy > 0 && currOffset == -child.totalScrollRange) {

ViewCompat.stopNestedScroll(target, ViewCompat.TYPE_NON_TOUCH)

}

}

}

}

//////////////////////////////////////////////////////////////////////////////////////////

코드 사용법 

AppBarLayout abl = findViewById(R.id.app_bar);

((CoordinatorLayout.LayoutParams) abl.getLayoutParams()).setBehavior(new FixAppBarLayoutBehavior());

xml 사용법

<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>