Android listview viewpager滑动 跳动冲突解决
如:
当触发 滑动事件 的时候容易引起 滑动冲突 (比如斜着滑动viewpager 的时候 listview会跳动)
特别是在 下拉刷新或者上拉加载 的时候 , 组件可能会传递到viewpager当中
查阅了很多的帖子 发现修改起来都非常麻烦
(1)解决方案1. 针对viewpager 做了些修改
替换掉support.v4当中的viewpager即可:
package com.example.bz_viewpager;import android.content.Context;import android.support.v4.view.ViewPager;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.ViewGroup;/** * viewpage 和listview 相互冲突 将父view 传递到viewpage 里面 * * 使用父类的方法 parent.requestDisallowInterceptTouchEvent(true); * * 当 requestDisallowInterceptTouchEvent 如果为true的时候 表示:父view 不拦截子view的touch 事件 * * 这个方法只是改变flag * * @author baozi * */public class DecoratorViewPager extends ViewPager {private ViewGroup parent;public DecoratorViewPager(Context context) {super(context);// TODO Auto-generated constructor stub}public DecoratorViewPager(Context context, AttributeSet attrs) {super(context, attrs);}public void setNestedpParent(ViewGroup parent) {this.parent = parent;}@Overridepublic boolean dispatchTouchEvent(MotionEvent ev) {if (parent != null) {parent.requestDisallowInterceptTouchEvent(true);}return super.dispatchTouchEvent(ev);}@Overridepublic boolean onInterceptTouchEvent(MotionEvent arg0) {if (parent != null) {parent.requestDisallowInterceptTouchEvent(true);}return super.onInterceptTouchEvent(arg0);}@Overridepublic boolean onTouchEvent(MotionEvent arg0) {if (parent != null) {parent.requestDisallowInterceptTouchEvent(true);}return super.onTouchEvent(arg0);}}
2 . 在xml里面:<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android=""android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#f1f1f1" ><com.example.bz_viewpager.DecoratorViewPagerandroid:id="@+id/vp"android:layout_width="match_parent"android:layout_height="200dp"android:fadingEdge="none" /></RelativeLayout>3. 在代码里使用
将 viewpager 的父view传递到viewpager里面
调用: vp.setNestedpParent((ViewGroup)vp.getParent()); 方法
如下:
lv = (ListView) findViewById(R.id.lv);View header = LayoutInflater.from(MainActivity.this).inflate(R.layout.viewpage_layout, null);DecoratorViewPager vp = (DecoratorViewPager) header.findViewById(R.id.vp);vp.setNestedpParent((ViewGroup)vp.getParent());MyPagapter myPagapter = new MyPagapter(MainActivity.this);vp.setAdapter(myPagapter);lv.addHeaderView(header);(2)解析:
viewgroup 当中有 一个requestDisallowInterceptTouchEvent方法
这个方法只改变flag 当 view.requestDisallowInterceptTouchEvent 参数为true的时候
view 不会拦截其子控件的 触摸事件
/*** Called when a child does not want this parent and its ancestors to* intercept touch events with* {@link ViewGroup#onInterceptTouchEvent(MotionEvent)}.** <p>This parent should pass this call onto its parents. This parent must obey* this request for the duration of the touch (that is, only clear the flag* after this parent has received an up or a cancel.</p>** @param disallowIntercept True if the child does not want the parent to*intercept touch events.*/public void requestDisallowInterceptTouchEvent(boolean disallowIntercept);贴上源码: public void requestDisallowInterceptTouchEvent(boolean disallowIntercept) {if (disallowIntercept == ((mGroupFlags & FLAG_DISALLOW_INTERCEPT) != 0)) {// We're already in this state, assume our ancestors are tooreturn;}if (disallowIntercept) {mGroupFlags |= FLAG_DISALLOW_INTERCEPT;} else {mGroupFlags &= ~FLAG_DISALLOW_INTERCEPT;}// Pass it up to our parentif (mParent != null) {mParent.requestDisallowInterceptTouchEvent(disallowIntercept);}}
Demo 下载地址:
祝福大家每日精进
谢谢
，世界没有永久的冬天;不要讨厌麻烦，
