Android：横行滚动且隔行变色的ListView控件

效果图

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代码

hv_listview_item.xml

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hv_listview_layout.xml

HvListView的layout_width是item中列宽的总和。

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HvListView.java

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();
    }
}

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HvListViewAdapter.java

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> 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> 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;
    }
}

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HvListViewActivity.java

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> data = new ArrayList>();
        for (int i=0;i<50;i++){

            Map item = new HashMap();
            item.put("c1", i+"行1列");
            item.put("c2", i+"行2列");
            item.put("c3", i+"行3列");
            item.put("c4", i+"行4列");
            item.put("c5", i+"行5列");
            item.put("c6", i+"行6列");
            data.add(item);
        }
        HvListViewAdapter adapter = new HvListViewAdapter(this,
                data,
                R.layout.hv_listview_item,
                new String[]{
                        "c1",
                        "c2",
                        "c3",
                        "c4",
                        "c5",
                        "c6"
                },
                new int[]{
                        R.id.hv_listview_item_column1,
                        R.id.hv_listview_item_column2,
                        R.id.hv_listview_item_column3,
                        R.id.hv_listview_item_column4,
                        R.id.hv_listview_item_column5,
                        R.id.hv_listview_item_column6
                },
                listView
        );

        listView.setAdapter(adapter);
    }
}

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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。

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参考：Android支持横行滚动的ListView控件