android中设置ListView的选中的Item的背景颜色(附源码)

http://longyi-java.iteye.com/blog/976067

ListView中没有默认的选择颜色，只有选择Item后的焦点颜色，鼠标点击时Item有颜色，放开鼠标后颜色也就没有了，要实现放开鼠标后选择项的背景还是有颜色的。

 

1、配置main.xml

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical" android:layout_width="fill_parent"
     android:layout_height="fill_parent">
     <ListView android:id="@+id/listView" android:listSelector="#000000"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content" />
 </LinearLayout>

 

    设置Item的获取焦点颜色为白色android:listSelector="#000000"（即不显示背景颜色）

 

2、配置用于ListView显示Item的button_layout.xml

 

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/LinearLayoutButton"
   android:layout_width="144px"
   android:layout_height="99px"
   android:gravity="center"
   android:orientation="vertical">


     <TextView
         android:id="@+id/TextViewButton"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:textSize="20px">
     </TextView>


 </LinearLayout>

 

 

3、实现Activity

 

 

 package com.listButtonTest.www;

 import java.util.ArrayList;

 import android.app.Activity;
 import android.content.Context;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.BaseAdapter;
 import android.widget.LinearLayout;
 import android.widget.ListView;
 import android.widget.TextView;

 public class listButtonTest extends Activity {
     private ListView listView = null;
     private ListAdapter listAdapter = null;

     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main);
         listView = (ListView) this.findViewById(R.id.listView);
         ArrayList<ButtonView> buttonListView = new ArrayList<ButtonView>();
         ButtonView a = new ButtonView(R.string.l1);
         buttonListView.add(a);
         ButtonView b = new ButtonView(R.string.l2);
         buttonListView.add(b);
         ButtonView c = new ButtonView(R.string.l3);
         buttonListView.add(c);
         ButtonView d = new ButtonView(R.string.l4);
         buttonListView.add(d);
         ButtonView e = new ButtonView(R.string.l5);
         buttonListView.add(e);

         listAdapter = new ListAdapter(buttonListView);
         listView.setAdapter(listAdapter);
         listView.setDividerHeight(0);

         listView.setOnItemClickListener(new ListView.OnItemClickListener() {

             @Override
             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                     long arg3) {
                 // TODO Auto-generated method stub
                 listAdapter.setSelectedPosition(arg2);

                 listAdapter.notifyDataSetInvalidated();

             }
         });
     };



     public class ListAdapter extends BaseAdapter {

         ArrayList<ButtonView> arrayList = null;
         LayoutInflater inflater;
         View view;
         ButtonLayoutHolder buttonLayoutHolder;
         LinearLayout buttonLayout = null;
         TextView buttonText = null;

         private int selectedPosition = -1;// 选中的位置

         public ListAdapter(ArrayList<ButtonView> buttonListView) {
             // TODO Auto-generated constructor stub
             arrayList = buttonListView;
         }

         @Override
         public int getCount() {
             // TODO Auto-generated method stub
             return arrayList.size();
         }

         @Override
         public Object getItem(int position) {
             // TODO Auto-generated method stub
             return arrayList.get(position);
         }

         @Override
         public long getItemId(int position) {
             // TODO Auto-generated method stub
             return position;
         }

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

         @Override
         public View getView(int position, View convertView, ViewGroup parent) {
             // TODO Auto-generated method stub
             inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             view = inflater.inflate(R.layout.button_layout, null, false);
             buttonLayoutHolder = (ButtonLayoutHolder) view.getTag();

             if (buttonLayoutHolder == null) {
                 buttonLayoutHolder = new ButtonLayoutHolder();
                 buttonLayoutHolder.buttonLayout = (LinearLayout) view
                         .findViewById(R.id.LinearLayoutButton);
                 buttonLayoutHolder.textView = (TextView) view
                         .findViewById(R.id.TextViewButton);
                 view.setTag(buttonLayoutHolder);
             }
             buttonLayout = buttonLayoutHolder.buttonLayout;
             buttonText = buttonLayoutHolder.textView;
             if (selectedPosition == position) {
                 buttonText.setSelected(true);
                 buttonText.setPressed(true);
                 buttonLayout.setBackgroundColor(Color.RED);
             } else {
                 buttonText.setSelected(false);
                 buttonText.setPressed(false);
                 buttonLayout.setBackgroundColor(Color.TRANSPARENT);

             }

             buttonText.setTextColor(Color.WHITE);
             buttonText.setText(arrayList.get(position).textViewId);

             return view;

         }

     };

 }

 class ButtonView {
     int textViewId;

     ButtonView(int tId) {
         textViewId = tId;
     }
 }

 class ButtonLayoutHolder {
     LinearLayout buttonLayout;
     TextView textView;
 }

 

 

  在listView的setOnItemClickListener事件中标记这次选择的Item的下标：listAdapter.setSelectedPosition(arg2);

 

  然后调用listAdapter.notifyDataSetInvalidated()通知后台重新刷新界面。

 

  在ListAdapter的getView()方法中，如果是选中的Item则显示背景颜色，如果不是则不显示背景颜色。

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