自定义Adapter实现类似office表格被选中的效果

自定义Adapter实现类似office表格被选中的效果

已有 298 次阅读2012-6-18 11:15 |个人分类:ListView|系统分类:Android开发| 表格, office, BaseAdapter

package com.mexxen.util;

import java.util.List;

import java.util.Map;

import android.content.Context;

import android.graphics.Color;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.TextView;

/**自定义List*/

public class ListAdapter extends BaseAdapter{

// 被选中的序号

private int selectedPosition = -1;

private LayoutInflater inflater;

// CONTEXT

private Context context;

/**要导入进的数据源*/

private List<Map<String, Object>> data;

private int resource;

private String[] from;

private int[] to;

private TextView[] tv;

public ListAdapter(Context context, List<Map<String, Object>> data, int resource, String[] from, int[] to){

this.context = context;

this.data = data;

this.resource = resource;

this.from = from;

this.to = to;

tv = new TextView[to.length];

}

public int getSelectedPosition() {

return selectedPosition;

}

public void setSelectedPosition(int selectedPosition) {

this.selectedPosition = selectedPosition;

}

public int getCount() {

return data.size();

}

public Object getItem(int position) {

return data.get(position);

}

public long getItemId(int position) {

return position;

}

public View getView(int position, View view, ViewGroup arg2) {

if(inflater == null){

inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

if(view == null){

view  = inflater.inflate(resource, null, false);

}

for(int i = 0; i < to.length; i++){

// 遍历数组，给每个TextView设置文本内容

tv[i] = (TextView) view.findViewById(to[i]);

tv[i].setText(data.get(position).get(from[i]).toString());

}

if(selectedPosition == position){

for(int i = 0; i < to.length; i++){

tv[i].setSelected(true);

tv[i].setPressed(true);

tv[i].setBackgroundColor(Color.BLUE);

tv[i].setTextColor(Color.WHITE);

}

}else{

for(int i = 0; i < to.length; i++){

tv[i].setSelected(false);

tv[i].setPressed(false);

tv[i].setBackgroundColor(Color.WHITE);

tv[i].setTextColor(Color.BLACK);

}

}

return view;

}

}


Activity中调用
Listview listView;
private ListAdapter la;


//实例化listView

//实例化自定义适配ListAdapter
//与系统的 SimpleAdapter 参数一样只是to只能是TextView的数组
la =new ListAdapter(context, data, resource, from, to);
listView.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

la.setSelectedPosition(position - 1);

la.notifyDataSetInvalidated();

}

});

此代码超过100个TextView会比较卡，数据多建议分页。