簡(jiǎn)單實(shí)現(xiàn)ListView選中后的效果

1、創(chuàng)建activity界面布局.xml

<?xml version="1.0" encoding="utf-8"?>  

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  

              android:orientation="vertical"  

              android:layout_width="match_parent"  

              android:layout_height="match_parent">  

         <ListView android:id="@+id/listview"  

              android:layout_width="match_parent"   

              android:layout_height="match_parent"   

             android:cacheColorHint="#00000000" /> 

</LinearLayout> 

2、自定義列表的適配器adapter

package com.example.t;

import java.util.ArrayList;

import android.content.Context;
import android.graphics.Bitmap;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MyListviewAdapter extends BaseAdapter {

 private LayoutInflater inflater = null;
 private ArrayList<String> arraylist = null;
 private Bitmap icon;

 private int selectedPosition = -1;
 private Context context;

 public void setSelectedPosition(int position) {
  selectedPosition = position;
 }

 public void setDatas(ArrayList<String> tmp) {
  // 保存適配器中的每項(xiàng)的文字信息
  this.arraylist.clear();
  this.arraylist.addAll(tmp);
  notifyDataSetChanged();
 }

 public MyListviewAdapter(Context context) {
  this.context = context;
  // LayoutInflater用來加載界面
  inflater = LayoutInflater.from(context);
 }

 @Override
 public int getCount() {
  return arraylist.size();
 }

 @Override
 public Object getItem(int position) {
  return arraylist.get(position);
 }

 @Override
 public long getItemId(int position) {
  return position;
 }

 // 保存每項(xiàng)中的控件的引用
 class ViewHolder {
  TextView text;
  LinearLayout layout;
 }

 @Override
 public View getView(int position, View convert, ViewGroup parent) {
  ViewHolder holder;
  if (convert == null) // 實(shí)現(xiàn)復(fù)用行布局
  {
   // 調(diào)用LayoutInflater的inflate方法加載layout文件夾中的界面
   convert = inflater.inflate(R.layout.lists, null);
   holder = new ViewHolder();
   holder.text = (TextView) convert.findViewById(R.id.text);
   holder.layout = (LinearLayout) convert.findViewById(R.id.layout);
   // 保存包含當(dāng)前項(xiàng)控件的對(duì)象
   convert.setTag(holder);
  } else {
   // 獲取包含當(dāng)前項(xiàng)控件的對(duì)象
   holder = (ViewHolder) convert.getTag();
  }
  // 設(shè)置當(dāng)前項(xiàng)的內(nèi)容
  holder.text.setText(arraylist.get(position));
  // 設(shè)置選中效果
  if (selectedPosition == position) {
   holder.text.setTextColor(context.getResources().getColor(R.color.textcolor_select));
   holder.layout.setBackgroundResource(R.drawable.list_select)
  } else {
   holder.text.setTextColor(context.getResources().getColor(R.color.textcolor_normal));
   holder.layout.setBackgroundResource(R.drawable.list_normal)
  }
  return convert;
 }
}

3、列表的布局

<?xml version="1.0" encoding="utf-8"?>  

<LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"  

              android:orientation="vertical"  

              android:layout_width="match_parent"  

              android:layout_height="match_parent" 

   <LinearLayout android:orientation="horizontal"  

          android:layout_width="match_parent"  

          android:layout_height="40px"  

          android:id="@+id/layout"  

         android:padding="6px">  

        <TextView android:id="@+id/text"  

              android:layout_gravity="center_horizontal"  

              android:layout_width="match_parent"  

              android:layout_height="wrap_content" />  

    </LinearLayout>   

</LinearLayout>

4、在activity中

      // 添加列表框項(xiàng)目點(diǎn)擊事件   

        listview.setOnItemClickListener(new OnItemClickListener() {  

        @Override  

          public void onItemClick(AdapterView<?> parent, View view, int position, long id) {  

            // 設(shè)置適配器的選中項(xiàng)   

            listAdapter.setSelectedPosition(position);  

           // 更新列表框   

            listAdapter.notifyDataSetInvalidated();      

       }  

   });