<span style="font-family:Arial, Helvetica, sans-serif;"><span style="background-color: rgb(255, 255, 255);">原创文章 ，转载请说明出处</span></span>
<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">ListVeiw的重要性不多说，总结今天一下使用LIstView加载两种Item样式的情况</span>
1）要加载两种item样式，两个item样式xml文件肯定需要准备好 个人觉得 id望文生义很重要，
2）绑定ListView控件，不多说， 接着initView()准备两个Item布局需要的数据
3）最关键的一步来了，重写BaseAdapter!!!!!!!!! 怎么重写呢???附上的例子实现ListView的第一个Item与之后的Item样式不同，直接上代码 ，附带详细注释
importandroid.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by CMS on 2016/8/10.
*/
public class TextAdapter extends BaseAdapter{
private class ViewHolder1{ //ListView中大海报模块ViewHolder
ImageView imageView1;
TextView textView1-1;
TextView textView1-2;
TextView textView1-3;
TextView textView1-4;
TextView textView1-5;
}
private class ViewHolder2{ //ListView下面子模块ViewHolder
ImageView imageView2;
TextView textView2-1;
TextView textView2-2;
TextView textView2-3;
TextView textView2-4;
}
private Context context; //存储上下文
private List<Map<String,Object>> listData; //存储数据源
private int[] resource; //存储item布局文件
private String[] keyForm; //存储数据key值
private int[] idForm; //存储对应控件Id
private LayoutInflater inflater; //用来找res/layout/下的xml布局文件，并且实例化
private ViewHolder1 viewHolder1=null;
private ViewHolder2viewHolder2=null;
public TextAdapter(Context context,List<Map<String,Object>>listData, int[]resource, String[] keyForm, int[] idForm){
this.context=context;
this.listData=listData;
this.resource=new int[resource.length];
this.keyForm=new String[keyForm.length];
this.idForm=new int[idForm.length];
//调用系统方法拷贝数组
System.arraycopy(keyForm,0,this.keyForm,0,keyForm.length);
System.arraycopy(idForm,0,this.idForm,0,idForm.length);
System.arraycopy(resource,0,this.resource,0,resource.length);
inflater=(LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount(){
return listData.size();
}
@Override
public ObjectgetItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount(){
//重写getViewTypeCount()方法返回item样式的数量 这里实现ListView的第一个Item与之后的item的样式不同
return 2;
}
@Override
public int getItemViewType(int position) {
//返回item的样式类型 用在getView()方法中判断
if (position==0){ //如果是第一个item 放回类型0
return 0;
}else{ //如果是第二个item 放回类型1
return 1;
}
}
@Override
public ViewgetView(int position, View convertView, ViewGroup parent){
if (getItemViewType(position)==0){ //如果item需要使用的样式类型为第一种
if (convertView!=null){ //判断是否缓存
viewHolder1= (ViewHolder1) convertView.getTag(); //converView不为空 通过tag找到缓存的布局
}else{
convertView=inflater.inflate(resource[0],null); //同步第一个item的样式布局文件的实例化布局
viewHolder1=new ViewHolder1(); //实例化第一个Item对应的VIE我Holder
//获取idForm数组中的id数据 绑定控件
viewHolder1.imageView1= (ImageView) convertView.findViewById(idForm[0]);
viewHolder1.textView1-1= (TextView) convertView.findViewById(idForm[1]);
viewHolder1.textView1-2= (TextView) convertView.findViewById(idForm[2]);
viewHolder1.textView1-3= (TextView) convertView.findViewById(idForm[3]);
viewHolder1.textView1-4= (TextView) convertView.findViewById(idForm[4]);
viewHolder1.textView1-5= (TextView) convertView.findViewById(idForm[5]);
convertView.setTag(viewHolder1);
}
}else { //如果Item需要使用的样式为第二种 下面步骤同上
if (convertView!=null){
viewHolder2= (ViewHolder2) convertView.getTag();
}else{
convertView=inflater.inflate(resource[1],null);
viewHolder2=new ViewHolder2();
viewHolder2.imageView2= (ImageView) convertView.findViewById(idForm[6]);
viewHolder2.textView2-1= (TextView) convertView.findViewById(idForm[7]);
viewHolder2.textView2-2= (TextView) convertView.findViewById(idForm[8]);
viewHolder2.textView2-3= (TextView) convertView.findViewById(idForm[9]);
viewHolder2.textView2-4= (TextView) convertView.findViewById(idForm[10]);
convertView.setTag(viewHolder2);
}
}
//
HashMap<String,Object> map= (HashMap<String,Object>) listData.get(position); //通过位置获取listData中的map元素
if(getItemViewType(position)==0&&map!=null){ //当item需要加载的布局类型为第一种时
//通过keyFrorm获取各个数据相应的Key值 然后通过Key中在map中取出对应的数据
int imageView1= (Integer) map.get(keyForm[0]);
String textView1-1= (String) map.get(keyForm[1]);
String textView1-2= (String)map.get(keyForm[2]);
String textView1-3= (String)map.get(keyForm[3]);
//设置布局中控件要显示的视图
viewHolder1.imageView1.setImageResource(imageView1);
viewHolder1.textView1-1.setText(textView1-1);
viewHolder1.textView1-2.setText(textView1-2);
viewHolder1.textView1-3.setText(textView1-3);
//为特定的控件设置点击事件
viewHolder1.textView1-4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, "报名参加", Toast.LENGTH_SHORT).show();
}
});
viewHolder1.textView1-5.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(context, "查看详情", Toast.LENGTH_SHORT).show();
}
});
}else if (getItemViewType(position)!=0&&map!=null){ //当item需要加载的布局类型为第二种时 其他步骤同上
int imageView2= (Integer) map.get(keyForm[4]);
String textView2-1= (String) map.get(keyForm[5]);
String textView2-2= (String)map.get(keyForm[6]);
String textView2-3= (String)map.get(keyForm[7]);
viewHolder2.imageView2.setImageResource(imageView2);
viewHolder2.textView2-1.setText(textView2-1);
viewHolder2.textView2-2.setText(textView2-2);
viewHolder2.textView2-3.setText(textView2-3);
viewHolder2.textView2-4.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(context, "查看详情", Toast.LENGTH_SHORT).show();
}
});
}
return convertView;
}
}
importandroid.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Created by CMS on 2016/8/10.
*/
public class TextAdapter extends BaseAdapter{
private class ViewHolder1{ //ListView中大海报模块ViewHolder
ImageView imageView1;
TextView textView1-1;
TextView textView1-2;
TextView textView1-3;
TextView textView1-4;
TextView textView1-5;
}
private class ViewHolder2{ //ListView下面子模块ViewHolder
ImageView imageView2;
TextView textView2-1;
TextView textView2-2;
TextView textView2-3;
TextView textView2-4;
}
private Context context; //存储上下文
private List<Map<String,Object>> listData; //存储数据源
private int[] resource; //存储item布局文件
private String[] keyForm; //存储数据key值
private int[] idForm; //存储对应控件Id
private LayoutInflater inflater; //用来找res/layout/下的xml布局文件，并且实例化
private ViewHolder1 viewHolder1=null;
private ViewHolder2viewHolder2=null;
public TextAdapter(Context context,List<Map<String,Object>>listData, int[]resource, String[] keyForm, int[] idForm){
this.context=context;
this.listData=listData;
this.resource=new int[resource.length];
this.keyForm=new String[keyForm.length];
this.idForm=new int[idForm.length];
//调用系统方法拷贝数组
System.arraycopy(keyForm,0,this.keyForm,0,keyForm.length);
System.arraycopy(idForm,0,this.idForm,0,idForm.length);
System.arraycopy(resource,0,this.resource,0,resource.length);
inflater=(LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount(){
return listData.size();
}
@Override
public ObjectgetItem(int position) {
return listData.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount(){
//重写getViewTypeCount()方法返回item样式的数量 这里实现ListView的第一个Item与之后的item的样式不同
return 2;
}
@Override
public int getItemViewType(int position) {
//返回item的样式类型 用在getView()方法中判断
if (position==0){ //如果是第一个item 放回类型0
return 0;
}else{ //如果是第二个item 放回类型1
return 1;
}
}
@Override
public ViewgetView(int position, View convertView, ViewGroup parent){
if (getItemViewType(position)==0){ //如果item需要使用的样式类型为第一种
if (convertView!=null){ //判断是否缓存
viewHolder1= (ViewHolder1) convertView.getTag(); //converView不为空 通过tag找到缓存的布局
}else{
convertView=inflater.inflate(resource[0],null); //同步第一个item的样式布局文件的实例化布局
viewHolder1=new ViewHolder1(); //实例化第一个Item对应的VIE我Holder
//获取idForm数组中的id数据 绑定控件
viewHolder1.imageView1= (ImageView) convertView.findViewById(idForm[0]);
viewHolder1.textView1-1= (TextView) convertView.findViewById(idForm[1]);
viewHolder1.textView1-2= (TextView) convertView.findViewById(idForm[2]);
viewHolder1.textView1-3= (TextView) convertView.findViewById(idForm[3]);
viewHolder1.textView1-4= (TextView) convertView.findViewById(idForm[4]);
viewHolder1.textView1-5= (TextView) convertView.findViewById(idForm[5]);
convertView.setTag(viewHolder1);
}
}else { //如果Item需要使用的样式为第二种 下面步骤同上
if (convertView!=null){
viewHolder2= (ViewHolder2) convertView.getTag();
}else{
convertView=inflater.inflate(resource[1],null);
viewHolder2=new ViewHolder2();
viewHolder2.imageView2= (ImageView) convertView.findViewById(idForm[6]);
viewHolder2.textView2-1= (TextView) convertView.findViewById(idForm[7]);
viewHolder2.textView2-2= (TextView) convertView.findViewById(idForm[8]);
viewHolder2.textView2-3= (TextView) convertView.findViewById(idForm[9]);
viewHolder2.textView2-4= (TextView) convertView.findViewById(idForm[10]);
convertView.setTag(viewHolder2);
}
}
//
HashMap<String,Object> map= (HashMap<String,Object>) listData.get(position); //通过位置获取listData中的map元素
if(getItemViewType(position)==0&&map!=null){ //当item需要加载的布局类型为第一种时
//通过keyFrorm获取各个数据相应的Key值 然后通过Key中在map中取出对应的数据
int imageView1= (Integer) map.get(keyForm[0]);
String textView1-1= (String) map.get(keyForm[1]);
String textView1-2= (String)map.get(keyForm[2]);
String textView1-3= (String)map.get(keyForm[3]);
//设置布局中控件要显示的视图
viewHolder1.imageView1.setImageResource(imageView1);
viewHolder1.textView1-1.setText(textView1-1);
viewHolder1.textView1-2.setText(textView1-2);
viewHolder1.textView1-3.setText(textView1-3);
//为特定的控件设置点击事件
viewHolder1.textView1-4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(context, "报名参加", Toast.LENGTH_SHORT).show();
}
});
viewHolder1.textView1-5.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(context, "查看详情", Toast.LENGTH_SHORT).show();
}
});
}else if (getItemViewType(position)!=0&&map!=null){ //当item需要加载的布局类型为第二种时 其他步骤同上
int imageView2= (Integer) map.get(keyForm[4]);
String textView2-1= (String) map.get(keyForm[5]);
String textView2-2= (String)map.get(keyForm[6]);
String textView2-3= (String)map.get(keyForm[7]);
viewHolder2.imageView2.setImageResource(imageView2);
viewHolder2.textView2-1.setText(textView2-1);
viewHolder2.textView2-2.setText(textView2-2);
viewHolder2.textView2-3.setText(textView2-3);
viewHolder2.textView2-4.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
Toast.makeText(context, "查看详情", Toast.LENGTH_SHORT).show();
}
});
}
return convertView;
}
}
4）回到Activity 实例化TextAdapter 将准备好的数据传入 然后setAdapter