ScrollView中嵌套ListView,GridView

一、在ScrollView中添加一属性 android:fillViewport=”true” 。

二、指定ListView的高度 android:layout_height=”XXXdip” ;

三、通过方法计算高度 setLayoutParams(params);

private void setListViewHeight(ListView listView) {
//获取ListView对应的Adapter
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}
int totalHeight = 0;
for (int i = 0, len = listAdapter.getCount(); i < len; i++) { //listAdapter.getCount()返回数据项的数目
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0); //计算子项View 的宽高
totalHeight += listItem.getMeasuredHeight(); //统计所有子项的总高度
}

ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
//listView.getDividerHeight()获取子项间分隔符占用的高度
//params.height最后得到整个ListView完整显示需要的高度
listView.setLayoutParams(params);
}

四、重写ListView，GridView

public class TestListView extends ListView{

public TestListView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
public TestListView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public TestListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
int expandSpec = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);

super.onMeasure(widthMeasureSpec, expandSpec);
}

}

public class MyGridView extends GridView{

public MyGridView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public MyGridView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
public MyGridView(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// TODO Auto-generated method stub
int expandSpec = MeasureSpec.makeMeasureSpec(
Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, expandSpec);

}
}

五、 解决scroolview与viewpager冲突

1.自定义scrollview

/**
* 能够兼容ViewPager的ScrollView
* @Description: 解决了ViewPager在ScrollView中的滑动反弹问题

* @File: ScrollViewExtend.java

* @Package com.image.indicator.control

* @Author Hanyonglu

* @Date 2012-6-18 下午01:34:50

* @Version V1.0
*/
public class ScrollViewExtend extends ScrollView {
// 滑动距离及坐标
private float xDistance, yDistance, xLast, yLast;

public ScrollViewExtend(Context context, AttributeSet attrs) {
super(context, attrs);
}

@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
xDistance = yDistance = 0f;
xLast = ev.getX();
yLast = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
final float curX = ev.getX();
final float curY = ev.getY();

xDistance += Math.abs(curX - xLast);
yDistance += Math.abs(curY - yLast);
xLast = curX;
yLast = curY;

if(xDistance > yDistance){
return false;
}
}

return super.onInterceptTouchEvent(ev);
}
} 2.自定义viewpager
public class ChildViewPager extends ViewPager{
/** 触摸时按下的点 **/
PointF downP = new PointF();
/** 触摸时当前的点 **/
PointF curP = new PointF();
OnSingleTouchListener onSingleTouchListener;

public ChildViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

public ChildViewPager(Context context) {
super(context);
// TODO Auto-generated constructor stub
}

@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
// TODO Auto-generated method stub
//当拦截触摸事件到达此位置的时候，返回true，
//说明将onTouch拦截在此控件，进而执行此控件的onTouchEvent
return true;
}

@Override
public boolean onTouchEvent(MotionEvent arg0) {
// TODO Auto-generated method stub
//每次进行onTouch事件都记录当前的按下的坐标
curP.x = arg0.getX();
curP.y = arg0.getY();

if(arg0.getAction() == MotionEvent.ACTION_DOWN){
//记录按下时候的坐标
//切记不可用 downP = curP ，这样在改变curP的时候，downP也会改变
downP.x = arg0.getX();
downP.y = arg0.getY();
//此句代码是为了通知他的父ViewPager现在进行的是本控件的操作，不要对我的操作进行干扰
getParent().requestDisallowInterceptTouchEvent(true);
}

if(arg0.getAction() == MotionEvent.ACTION_MOVE){
//此句代码是为了通知他的父ViewPager现在进行的是本控件的操作，不要对我的操作进行干扰
getParent().requestDisallowInterceptTouchEvent(true);
}

if(arg0.getAction() == MotionEvent.ACTION_UP){
//在up时判断是否按下和松手的坐标为一个点
//如果是一个点，将执行点击事件，这是我自己写的点击事件，而不是onclick
if(downP.x==curP.x && downP.y==curP.y){
onSingleTouch();
return true;
}
}

return super.onTouchEvent(arg0);
}

/**
* 单击
*/
public void onSingleTouch() {
if (onSingleTouchListener!= null) {

onSingleTouchListener.onSingleTouch();
}
}

/**
* 创建点击事件接口
* @author wanpg
*
*/
public interface OnSingleTouchListener {
public void onSingleTouch();
}

public void setOnSingleTouchListener(OnSingleTouchListener onSingleTouchListener) {
this.onSingleTouchListener = onSingleTouchListener;
}

}