安卓解决viewPager+scrollView+listView滑动冲突的问题

很多人在开发过程中都会设计到首页里面的排版功能,整个页面是一个可滑动的scrollView,上面是一个viewpager轮播图,然后下面又有带滑动的ListView,我们一般会先禁用ListView的滑动功能,让整个ScrollView在首页上下滑动就可以了。

禁用listView的滑动其实就是自定义一个View重写里面的onMeasure方法就行了，然后对于轮播图和ScrollView的滑动冲突我也是通过自定义的两个InsideViewPager和PagerScrollView来处理，后面会贴出3种自定义View的代码。最后就是一个界面体验的小问题，所有的可滑动的View控件，在滑动到屏幕边缘的时候都会有一个并不是很美观的阴影效果，这里我们可以用相同的方式来解决：

xml文件里面：

<ScrollView

android:id="@+id/scrollView"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:fadingEdge="none"

android:overScrollMode="never"

android:fillViewport="true">

代码里面:

scrollView = getActivity().findViewById(R.id.scrollView);

scrollView.setHorizontalFadingEdgeEnabled(false);

下面贴出解决滑动冲突的代码:

自定义ScrollView:

package cn.wifi.youngrefersto.view;

import android.content.Context;

import android.util.AttributeSet;

import android.view.GestureDetector;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.MotionEvent;

import android.widget.ScrollView;

public class PagerScrollView extends ScrollView{

private GestureDetector mGestureDetector;

public PagerScrollView(Context context) {

super(context);

init();

}

public PagerScrollView(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

init();

}

public PagerScrollView(Context context, AttributeSet attrs) {

super(context, attrs);

init();

}

private void init() {

mGestureDetector = new GestureDetector(getContext(),

new YScrollDetector());

setFadingEdgeLength(0);

}

@Override

public boolean onInterceptTouchEvent(MotionEvent ev) {

return super.onInterceptTouchEvent(ev)

&& mGestureDetector.onTouchEvent(ev);

}

private class YScrollDetector extends SimpleOnGestureListener {

@Override

public boolean onScroll(MotionEvent e1, MotionEvent e2,

float distanceX, float distanceY) {

if (Math.abs(distanceY) >= Math.abs(distanceX)) {

return true;

}

return false;

}

}

}

自定义ViewPager:

package cn.wifi.youngrefersto.view;

import android.content.Context;

import android.support.v4.view.ViewPager;

import android.util.AttributeSet;

import android.view.MotionEvent;

public class InsideViewPager extends ViewPager {

float curX = 0f;

float downX = 0f;

OnSingleTouchListener onSingleTouchListener;

public InsideViewPager(Context context) {

super(context);

}

public InsideViewPager(Context context, AttributeSet attrs) {

super(context, attrs);

}

@Override

public boolean onTouchEvent(MotionEvent ev) {

curX = ev.getX();

// TODO Auto-generated method stub

if (ev.getAction() == MotionEvent.ACTION_DOWN) {

downX = curX;

}

int curIndex = getCurrentItem();

if (curIndex == 0) {

if (downX <= curX) {

getParent().requestDisallowInterceptTouchEvent(false);

} else {

getParent().requestDisallowInterceptTouchEvent(true);

}

} else if (curIndex == getAdapter().getCount() - 1) {

if (downX >= curX) {

getParent().requestDisallowInterceptTouchEvent(false);

} else {

getParent().requestDisallowInterceptTouchEvent(true);

}

} else {

getParent().requestDisallowInterceptTouchEvent(true);

}

return super.onTouchEvent(ev);

}

public void onSingleTouch() {

if (onSingleTouchListener != null) {

onSingleTouchListener.onSingleTouch();

}

}

public interface OnSingleTouchListener {

public void onSingleTouch();

}

public void setOnSingleTouchListner(

OnSingleTouchListener onSingleTouchListener) {

this.onSingleTouchListener = onSingleTouchListener;

}

}

自定义ListView:

package cn.wifi.youngrefersto.view;

import android.content.Context;

import android.util.AttributeSet;

import android.widget.ListView;

public class NoScrollListView extends ListView{

public NoScrollListView(Context context, AttributeSet attrs) {

super(context, attrs);

}

/**

* 设置不滚动

*/

public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

{

int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,

MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, expandSpec);

}

}