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处理CoordinatorLayout滑动抖动问题

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参考https://www.jianshu.com/p/507091d4cc0f
This commit is contained in:
huangjian
2020-12-02 16:51:24 +08:00
parent 975adea2f5
commit 9de70ff3e4
4 changed files with 200 additions and 0 deletions
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2
app/proguard-rules.pro vendored
View File

@@ -367,3 +367,5 @@
-dontwarn com.meizu.cloud.**
-keep class com.meizu.cloud.** {*;}
-keep class com.yizhuan.erban.ui.widget.AppBarLayoutBehavior {*;}

2
app/src/main/java/com/yizhuan/erban/home/fragment/GameHomeFragment.java
View File

@@ -846,6 +846,8 @@ public class GameHomeFragment extends BaseMvpFragment<IMainFragmentView, MainFra
private void loadHomPlay() {
if (addFriendsAdapter == null) {
mBinding.rvAddFriends.setLayoutManager(new LinearLayoutManager(mContext));
mBinding.rvAddFriends.setNestedScrollingEnabled(false);
mBinding.rvAddFriends.setFocusable(false);
addFriendsAdapter = new HomeAddFriendsAdapter();
mBinding.rvAddFriends.setAdapter(addFriendsAdapter);
mBinding.rvAddFriends.addItemDecoration(new RecyclerView.ItemDecoration() {

195
app/src/main/java/com/yizhuan/erban/ui/widget/AppBarLayoutBehavior.java Normal file
View File

@@ -0,0 +1,195 @@
package com.yizhuan.erban.ui.widget;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.OverScroller;
import androidx.coordinatorlayout.widget.CoordinatorLayout;
import com.google.android.material.appbar.AppBarLayout;
import org.jetbrains.annotations.NotNull;
import java.lang.reflect.Field;
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(@NotNull 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(@NotNull CoordinatorLayout parent, @NotNull AppBarLayout child,
@NotNull 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(@NotNull 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, @NotNull 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);
}
}
}

1
app/src/main/res/layout/fragment_game_home.xml
View File

@@ -97,6 +97,7 @@
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/translucent"
app:layout_behavior="com.yizhuan.erban.ui.widget.AppBarLayoutBehavior"
app:elevation="0dp">
<com.google.android.material.appbar.CollapsingToolbarLayout