HvListView的layout_width是item中列宽的总和。
import android.content.Context;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.ListView;
/**
* 横向滚动ListView
* 自定义ListView,增加了横向手势监听,并在横向滚动时手动触发Layout容器内的滚动。
*/
public class HvListView extends ListView {
/** 手势 */
private GestureDetector mGesture;
/** 列头 */
public LinearLayout mListHead;
/** 偏移坐标 */
private int mOffset = 0;
/** 屏幕宽度 */
private int screenWidth;
/** 构造函数 */
public HvListView(Context context, AttributeSet attrs) {
super(context, attrs);
mGesture = new GestureDetector(context, mOnGesture);
}
/** 分发触摸事件 */
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
super.dispatchTouchEvent(ev);
return mGesture.onTouchEvent(ev);
}
/** 手势 */
private GestureDetector.OnGestureListener mOnGesture = new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
return false;
}
/** 滚动 */
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
synchronized (HvListView.this) {
int moveX = (int) distanceX;
int curX = mListHead.getScrollX();
int scrollWidth = getWidth();
int dx = moveX;
//控制越界问题
if (curX + moveX < 0)
dx = 0;
if (curX + moveX + getScreenWidth() > scrollWidth)
dx = scrollWidth - getScreenWidth() - curX;
mOffset += dx;
//根据手势滚动Item视图
for (int i = 0, j = getChildCount(); i < j; i++) {
View child = ((ViewGroup) getChildAt(i)).getChildAt(1);
if (child.getScrollX() != mOffset)
child.scrollTo(mOffset, 0);
}
mListHead.scrollBy(dx, 0);
}
requestLayout();
return true;
}
};
/**
* 获取屏幕可见范围内最大屏幕
* @return
*/
public int getScreenWidth() {
if (screenWidth == 0) {
screenWidth = getContext().getResources().getDisplayMetrics().widthPixels;
if (getChildAt(0) != null) {
screenWidth -= ((ViewGroup) getChildAt(0)).getChildAt(0)
.getMeasuredWidth();
} else if (mListHead != null) {
//减去固定第一列
screenWidth -= mListHead.getChildAt(0).getMeasuredWidth();
}
}
return screenWidth;
}
/** 获取列头偏移量 */
public int getHeadScrollX() {
return mListHead.getScrollX();
}
}
import java.util.List;
import java.util.Map;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
/**
* 自定义Adapter,填充HvListView,并实现隔行变色的功能
*/
public class HvListViewAdapter extends BaseAdapter {
private List extends Map> data = null;
private Context context = null;
private int resource = 0;
private String[] from = null;
private int[] to = null;
private HvListView listView = null;
public HvListViewAdapter(Context context,
List extends Map> data,
int resource,
String[] from,
int[] to,
HvListView listView){
this.context = context;
this.data = data;
this.resource = resource;
this.from = from;
this.to = to;
this.listView = listView;
}
@Override
public int getCount() {
return data.size();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(resource, null);
}
for (int i = 0; i < to.length; i++) {
((TextView) convertView.findViewById(to[i])).setText(data.get(position).get(from[i]).toString());
}
//校正(处理同时上下和左右滚动出现错位情况)
View child = ((ViewGroup) convertView).getChildAt(1);
int head = listView.getHeadScrollX();
if (child.getScrollX() != head) {
child.scrollTo(listView.getHeadScrollX(), 0);
}
//隔行变色
if (position % 2 == 0){
convertView.setBackgroundResource(R.color.ivory);
}else{
convertView.setBackgroundResource(R.color.peachpuff);
}
return convertView;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
}
import android.app.Activity;
import android.os.Bundle;
import android.widget.LinearLayout;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class HvListViewActivity extends Activity {
private HvListView listView;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.hv_listview_layout);
listView = (HvListView)findViewById(R.id.hv_listview);
listView.mListHead = (LinearLayout)findViewById(R.id.hv_listview_item_head);
initData();
}
private void initData(){
List
从代码看得出,本办法比较麻烦的是需要自己来指定固定宽度。在企业应用展示多行多列数据时还是非常有用的,比如炒股软件也有这样的需求。
当前不支持Fling操作,所以即使用力滑也不好滑太多。
参考:Android支持横行滚动的ListView控件