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

Java代码


<?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



Java代码


<?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





Java代码


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。