Android學習之重載實作ListView的間隔背景色

清單是很常用的資料展現形式，清單的背景色采用不同的顔色間隔顯示是比較好的設計，可以使人更清楚的檢視資料，也使資料看上去更美觀

Android中，預設的ListView的背景色是黑色的，

可以通過重載方法修改背景色

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 關聯擴充卡
        SimpleAdapter mAdapter = new SimpleAdapter(this,
        		getData(), R.layout.main,
        //		new String[]{"title","info","img"},
        //		new int[]{R.id.title, R.id.info, R.id.img});
        		new String[]{"title","info"},
                new int[]{R.id.title, R.id.info})
        {
        	@Override
        	public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
          //      view.setBackgroundResource(colors[position % 10]);
                if (position % 2 == 0 )
                {
                	//如果注釋掉這句，滑動後，所有cell都會變成Color.GRAY
                	//可能是有種緩存機制
                	view.setBackgroundColor(Color.BLACK);
                }
                else
                {
        //        	view.setBackgroundResource(Color.GRAY);
                	view.setBackgroundColor(Color.GRAY);
                }
                return view;
        }
        };
       
        setListAdapter(mAdapter);
    }
           

更多代碼示例

package com.dannyAndroid.simpleadapterlistviewdemo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.app.ListActivity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.*;
import android.widget.SimpleAdapter;

public class SimpleAdapterListViewDemo extends ListActivity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // 關聯擴充卡
        SimpleAdapter mAdapter = new SimpleAdapter(this,
        		getData(), R.layout.main,
        //		new String[]{"title","info","img"},
        //		new int[]{R.id.title, R.id.info, R.id.img});
        		new String[]{"title","info"},
                new int[]{R.id.title, R.id.info})
        {
        	@Override
        	public View getView(int position, View convertView, ViewGroup parent) {
                View view = super.getView(position, convertView, parent);
          //      view.setBackgroundResource(colors[position % 10]);
                if (position % 2 == 0 )
                {
                	//如果注釋掉這句，滑動後，所有cell都會變成Color.GRAY
                	//可能是有種緩存機制
                	view.setBackgroundColor(Color.BLACK);
                }
                else
                {
        //        	view.setBackgroundResource(Color.GRAY);
                	view.setBackgroundColor(Color.GRAY);
                }
                return view;
        }
        };
       
        setListAdapter(mAdapter);
    }
    // 擴充卡的清單資料來源
    private List<Map<String,Object>> getData() {
    	List<Map<String,Object>> mList = new ArrayList<Map<String,Object>>();
    	Map<String,Object> map = new HashMap<String,Object>();
    	
    	map.put("title", "Lei Feng");
    	map.put("info", "male");
    	map.put("img", R.drawable.male);
    	mList.add(map);

    	map = new HashMap<String,Object>();    	
    	map.put("title", "Mu Guiying");
    	map.put("info", "female");
    	map.put("img", R.drawable.female);
    	mList.add(map);

    	map = new HashMap<String,Object>();    	
    	map.put("title", "Lin Chong");
    	map.put("info", "male");
    	map.put("img", R.drawable.male);
    	mList.add(map);
    	
    	for (int i = 0; i < 20; i++)
    	{
    		map = new HashMap<String,Object>();    	
        	map.put("title", "Lin Chong");
        	map.put("info", "male");
        	map.put("img", R.drawable.male);
        	mList.add(map);
    	}
    	return mList;
    }
}