android中设置ListView的选中的Item的背景颜色

 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。

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