CoordinatorLayout AppBarLayout 结合下拉刷新 上拉加载更多 的滑动冲突解决

如果appBarLayout中有折叠控件 CollapsingToolbarLayout 或者其他一些控件 在滚动的时候进行判断和刷新事件处理

在这里:刷新框架:为

SwipyRefreshLayout

第一步:设置appBarLayout的监听:

if (appBarLayout != null)
            appBarLayout.addOnOffsetChangedListener(this);

第二部:

    @Override
    public void onOffsetChanged(AppBarLayout appBarLayout, int i) {
        super.onOffsetChanged(appBarLayout, i);
        if (srlLayout == null) return;
        srlLayout.setEnabled(i >= 0||isSlideToBottom(recyclerview) ? true : false);
    }

i>=0 表示appBarLayout 完全显示:需要开启能够刷新控件的触摸事件  enable=true;

至于 isSlideToBottom方法请查看 reyclerView滚动到底部的监听

当recyclerView滚动到底部 也需要开启 刷新控件的触摸事件 enable=true;

屏蔽刷新控件的范围:当appBarLayout 在滚动中 recylerView 没有滚动到底部


这里还有一种实现方式:

    @Override
    public void onOffsetChanged(AppBarLayout appBarLayout, int i) {
        super.onOffsetChanged(appBarLayout, i);
        LogUtils.d("-------->off:" + i + "  ScrollRange:" + appBarLayout.getTotalScrollRange() + "  height:" + appBarLayout.getHeight());
    }

CoordinatorLayout AppBarLayout 结合下拉刷新 上拉加载更多 的滑动冲突解决_第1张图片


可以观察到i>=0 表示appBarLaoyut完全打开

i==-appBarLayout.getTotalScrollRange() 时表示appBarLayout完全关闭或者折叠了

所以:i==-appBarLayout.getTotalScrollRange() 也可以进行判断 然后分发给刷新控件


顺便给出一个工具类:

import android.support.design.widget.AppBarLayout;
import android.support.v7.widget.RecyclerView;

/**
 * @author xuanyouwu
 * @email xuanyouwu@163.com
 * @time 2016-04-13 16:25
 */
public class DesignViewUtils {

    /**
     * AppBarLayout 完全显示 打开状态
     *
     * @param verticalOffset
     * @return
     */
    public static boolean isAppBarLayoutOpen(int verticalOffset) {
        return verticalOffset >= 0;
    }

    /**
     * AppBarLayout 关闭或折叠状态
     *
     * @param appBarLayout
     * @param verticalOffset
     * @return
     */
    public static boolean isAppBarLayoutClose(AppBarLayout appBarLayout, int verticalOffset) {
        return appBarLayout.getTotalScrollRange() == Math.abs(verticalOffset);
    }

    /**
     * RecyclerView 滚动到底部 最后一条完全显示
     *
     * @param recyclerView
     * @return
     */
    public static boolean isSlideToBottom(RecyclerView recyclerView) {
        if (recyclerView == null) return false;
        if (recyclerView.computeVerticalScrollExtent() + recyclerView.computeVerticalScrollOffset() >= recyclerView.computeVerticalScrollRange())
            return true;
        return false;
    }

    /**
     * RecyclerView 滚动到顶端
     *
     * @param recyclerView
     * @return
     */
    public static boolean isSlideToTop(RecyclerView recyclerView) {
        return recyclerView.computeVerticalScrollOffset() <= 0;
    }
}


完美解决刷新案例:

import android.support.design.widget.AppBarLayout;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.RecyclerView;
import android.view.ViewGroup;

import com.kekeclient.widget.design.DesignViewUtils;

/**
 * @author xuanyouwu
 * @email xuanyouwu@163.com
 * @time 2016-04-15 11:20
 * 

* 解决 嵌套nestScrolling appbar 刷新冲突 */ public class SwipyAppBarScrollListener extends RecyclerView.OnScrollListener implements AppBarLayout.OnOffsetChangedListener { private AppBarLayout appBarLayout; private RecyclerView recyclerView; private ViewGroup refreshLayout; private boolean isAppBarLayoutOpen = true; private boolean isAppBarLayoutClose; public SwipyAppBarScrollListener(AppBarLayout appBarLayout, ViewGroup refreshLayout, RecyclerView recyclerView) { this.appBarLayout = appBarLayout; this.refreshLayout = refreshLayout; this.recyclerView = recyclerView; disptachScrollRefresh(); } private void disptachScrollRefresh() { if (this.appBarLayout != null && this.recyclerView != null && refreshLayout != null) { this.appBarLayout.addOnOffsetChangedListener(this); this.recyclerView.addOnScrollListener(this); } } @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { super.onScrollStateChanged(recyclerView, newState); } @Override public void onScrolled(RecyclerView recyclerView, int dx, int dy) { super.onScrolled(recyclerView, dx, dy); dispatchScroll(); } @Override public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) { isAppBarLayoutOpen = DesignViewUtils.isAppBarLayoutOpen(verticalOffset); isAppBarLayoutClose = DesignViewUtils.isAppBarLayoutClose(appBarLayout, verticalOffset); dispatchScroll(); } private void dispatchScroll() { if (this.recyclerView != null && this.appBarLayout != null && this.refreshLayout != null) { //不可滚动 if (!(ViewCompat.canScrollVertically(recyclerView, -1) || ViewCompat.canScrollVertically(recyclerView, 1))) { refreshLayout.setEnabled(isAppBarLayoutOpen); } else//可以滚动 { if (isAppBarLayoutOpen || isAppBarLayoutClose) { if (!ViewCompat.canScrollVertically(recyclerView, -1) && isAppBarLayoutOpen) { refreshLayout.setEnabled(true); } else if (isAppBarLayoutClose && !ViewCompat.canScrollVertically(recyclerView, 1)) { refreshLayout.setEnabled(true); } else { refreshLayout.setEnabled(false); } } else { refreshLayout.setEnabled(false); } } } } }


 
  

用法:

recyclerview.addOnScrollListener(new SwipyAppBarScrollListener(appBarLayout, srlLayout, recyclerview));



 
 

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