在使用CoordinatorLayout時，套用AppBarLayout，實現滑動效果如果快速滑動，頂部就會出現回彈問題。

解決方法：重寫

AppBarLayout.Behavior

程式碼如下：

1.

public class TestBehavior extends AppBarLayout.Behavior {

    private static final int TYPE_FLING = 1;
    private boolean isFlinging;
    private boolean shouldBlockNestedScroll;
    public TestBehavior
 
() {
    }

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

    @Override
public boolean onInterceptTouchEvent(CoordinatorLayout parent, AppBarLayout child, MotionEvent ev) {
        Log.i("TestBehavior", "onInterceptTouchEvent:" + child.getTotalScrollRange());
 
shouldBlockNestedScroll = false;
        if (isFlinging) {
            shouldBlockNestedScroll = true;
}
        return super.onInterceptTouchEvent(parent, child, ev);
}

    @Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target, int dx, int dy, int
 
[] consumed, int type) {
        //注意看ViewCompat.TYPE_TOUCH
Log.i("TestBehavior", "onNestedPreScroll:" + child.getTotalScrollRange() + " ,dx:" + dx + " ,dy:" + dy + " ,type:" + type);
//返回1時，表示當前target處於非touch的滑動，
//該bug的引起是因為appbar在滑動時，CoordinatorLayout內的實現NestedScrollingChild2介面的滑動子類還未結束其自身的fling
        //所以這裡監聽子類的非touch時的滑動，然後block掉滑動事件傳遞給AppBarLayout
if (type == TYPE_FLING) {
            isFlinging = true;
}
        if (!shouldBlockNestedScroll) {
            super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type);
}
    }

    @Override
public void onNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout child, View target, int dxConsumed, int dyConsumed, int
dxUnconsumed, int dyUnconsumed, int type) {
        Log.i("TestBehavior", "onNestedScroll: target:" + target.getClass() + " ," + child.getTotalScrollRange() + " ,dxConsumed:"
+ dxConsumed + " ,dyConsumed:" + dyConsumed + " " + ",type:" + type);
        if (!shouldBlockNestedScroll) {
            super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type);
}
    }

    @Override
public void onStopNestedScroll(CoordinatorLayout coordinatorLayout, AppBarLayout abl, View target, int type) {
        super.onStopNestedScroll(coordinatorLayout, abl, target, type);
isFlinging = false;
shouldBlockNestedScroll = false;
}

2.在XML檔案中使用

<android.support.design.widget.AppBarLayout
android:id="@+id/cl"
android:layout_width="match_parent"
android:layout_height="350dp"
android:background="@android:color/white"
android:fitsSystemWindows="true"
android:orientation="vertical"
app:layout_behavior="com.example.zjlmdemo.TestBehavior">