亲测效果如下：
布局结构解析： 消除系统自带Toolbar的UI设计冲突问题。这样便于UI布局还原UI设计效果 折叠效果得到保证。头部布局放最后在上拉过程中不会被遮挡 这样的布局后续可以很方便的进化调整。比如进行滑动和tablayout联动等等 如果是不太复杂的首页这个可以直接拿来就用哦！
源码地址: gitee:https://gitee.com/lc951/my-android github:https://github.com/lichong951/MyAndroid/
参考ConstraintLayout：约束布局ConstraintLayout看这一篇就够了 CollapsingToolbarLayout：android新特性：使用CollapsingToolbarLayout实现折叠效果及问题解决
CoordinatorLayout+AppBarLayout抖动问题本想自己复现一下的，结果发现抖动效果没那么明显。借用一下这张图 
解决方案如下：
/**
*
* @author yangchong
* blog : https://github.com/yangchong211
* time : 2019/03/13
* desc : 自定义Behavior
* revise: 解决appbarLayout若干问题
* 1）快速滑动appbarLayout会出现回弹
* 2）快速滑动appbarLayout到折叠状态下，立马下滑，会出现抖动的问题
* 3）滑动appbarLayout，无法通过手指按下让其停止滑动
*
*/
public class AppBarLayoutBehavior extends AppBarLayout.Behavior {
private static final String TAG = "AppbarLayoutBehavior";
private static final int TYPE_FLING = 1;
private boolean isFlinging;
private boolean shouldBlockNestedScroll;
public AppBarLayoutBehavior(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onInterceptTouchEvent(CoordinatorLayout parent, AppBarLayout child, MotionEvent ev) {
LogUtil.d(TAG, "onInterceptTouchEvent:" + child.getTotalScrollRange());
shouldBlockNestedScroll = isFlinging;
switch (ev.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
//手指触摸屏幕的时候停止fling事件
stopAppbarLayoutFling(child);
break;
default:
break;
}
return super.onInterceptTouchEvent(parent, child, ev);
}
/**
* 反射获取私有的flingRunnable 属性，考虑support 28以后变量名修改的问题
* @return Field
* @throws NoSuchFieldException
*/
private Field getFlingRunnableField() throws NoSuchFieldException {
Class superclass = this.getClass().getSuperclass();
try {
// support design 27及一下版本
Class headerBehaviorType = null;
if (superclass != null) {
headerBehaviorType = superclass.getSuperclass();
}
if (headerBehaviorType != null) {
return headerBehaviorType.getDeclaredField("mFlingRunnable");
}else {
return null;
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
// 可能是28及以上版本
Class headerBehaviorType = superclass.getSuperclass().getSuperclass();
if (headerBehaviorType != null) {
return headerBehaviorType.getDeclaredField("flingRunnable");
} else {
return null;
}
}
}
/**
* 反射获取私有的scroller 属性，考虑support 28以后变量名修改的问题
* @return Field
* @throws NoSuchFieldException
*/
private Field getScrollerField() throws NoSuchFieldException {
Class superclass = this.getClass().getSuperclass();
try {
// support design 27及一下版本
Class headerBehaviorType = null;
if (superclass != null) {
headerBehaviorType = superclass.getSuperclass();
}
if (headerBehaviorType != null) {
return headerBehaviorType.getDeclaredField("mScroller");
}else {
return null;
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
// 可能是28及以上版本
Class headerBehaviorType = superclass.getSuperclass().getSuperclass();
if (headerBehaviorType != null) {
return headerBehaviorType.getDeclaredField("scroller");
}else {
return null;
}
}
}
/**
* 停止appbarLayout的fling事件
* @param appBarLayout
*/
private void stopAppbarLayoutFling(AppBarLayout appBarLayout) {
//通过反射拿到HeaderBehavior中的flingRunnable变量
try {
Field flingRunnableField = getFlingRunnableField();
Field scrollerField = getScrollerField();
if (flingRunnableField != null) {
flingRunnableField.setAccessible(true);
}
if (scrollerField != null) {
scrollerField.setAccessible(true);
}
Runnable flingRunnable = null;
if (flingRunnableField != null) {
flingRunnable = (Runnable) flingRunnableField.get(this);
}
OverScroller overScroller = (OverScroller) scrollerField.get(this);
if (flingRunnable != null) {
LogUtil.d(TAG, "存在flingRunnable");
appBarLayout.removeCallbacks(flingRunnable);
flingRunnableField.set(this, null);
}
if (overScroller != null && !overScroller.isFinished()) {
overScroller.abortAnimation();
}
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
@Override
public boolean onStartNestedScroll(CoordinatorLayout parent, AppBarLayout child,
View directTargetChild, View target,
int nestedScrollAxes, int type) {
LogUtil.d(TAG, "onStartNestedScroll");
stopAppbarLayoutFling(child);
return super.onStartNestedScroll(parent, child, directTargetChild, target,
nestedScrollAxes, type);
}
@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout,
AppBarLayout child, View target,
int dx, int dy, int[] consumed, int type) {
LogUtil.d(TAG, "onNestedPreScroll:" + child.getTotalScrollRange()
+ " ,dx:" + dx + " ,dy:" + dy + " ,type:" + type);
//type返回1时，表示当前target处于非touch的滑动，
//该bug的引起是因为appbar在滑动时，CoordinatorLayout内的实现NestedScrollingChild2接口的滑动
//子类还未结束其自身的fling
//所以这里监听子类的非touch时的滑动，然后block掉滑动事件传递给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) {
LogUtil.d(TAG, "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) {
LogUtil.d(TAG, "onStopNestedScroll");
super.onStopNestedScroll(coordinatorLayout, abl, target, type);
isFlinging = false;
shouldBlockNestedScroll = false;
}
private static class LogUtil{
static void d(String tag, String string){
Log.d(tag,string);
}
}
}
应用:
关于这个抖动的问题已经有大佬博客写的很细致了。参考下面即可： 【亲测】CoordinatorLayout滑动抖动问题
解决CoordinatorLayout+AppBarLayout滑动抖动（回弹）问题
COORDINATORLAYOUT+APPBARLAYOUT+RECYCLERVIEW 滑动冲突引发屏幕抖动的解决方案
CoordinatorLayout滑动抖动问题
解决CoordinatorLayout的动画抖动以及回弹问题
CoordinatorLayout和AppBarLayout 嵌套滑动时抖动的一个原生bug
