Android listview 加载不同的布局实现

由于项目在一个listview 中加载不同的布局item  搞定了该部分后 写出来跟大家分享下

改功能的实现又两种方式 

第一种的方式比较傻瓜式的 跟加载一种布局item 没有太大的区别 我就简单的说下基本的实现方式

该方式主要的特点就是在一个arraylist中 add 进去 不同的 数据modle类 每一个数据modle类 负责将数据显示到不同的布局上去  在实现 getview的方法时 通过 对 数据modle类 .class 进行判断 来加载 inflater 不同的布局 然后将数据显示

此方法跟加载一种布局的adpter 的写法没有太大的去呗 只是多了一个 .class 的判断 从而选择加载某个特点的布局 有几种布局 就需要定义多少的 viewholder；

第二中方法是利用 adapter自带的一些回调函数来实现 该功能谷歌已经在api中实现了

主要用到的方法是 

getItemViewType  该方法通过gettype 来确定当前要显示什么布局 当系统调用 getview时就根据type类型加载布局了

在该方法里必须返回一个“0” 否则会报错 

getViewTypeCount 返回需要加载的布局数

下面附上 adpter部分的代码 ：

public class ResponseAdapter extends BaseAdapter {
private ArrayList<ResponseModle> responseList;
private Context context;
private LayoutInflater inflater;
private final int MAX_TYPE = 4;
public ResponseAdapter(Context context,ArrayList<ResponseModle> responseList) {
// TODO Auto-generated constructor stub
this.context = context;
this.responseList = responseList;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
if(responseList==null&&responseList.size()==0){
return 0;
}
return responseList.size();
}


@Override
public Object getItem(int arg0) {
// TODO Auto-generated method stub
if(responseList==null&&responseList.size()==0){
return null;
}
return responseList.get(arg0);
}


@Override
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return arg0;
}


@Override
public int getItemViewType(int position) {
// TODO Auto-generated method stub
// if(position==0)
// return 0;
switch(responseList.get(position).getType()){
case Common.I_PUBLISHED:
return Common.I_PUBLISHED;
case Common.I_COMMENED:
return Common.I_COMMENED;
case Common.I_TAKED:
return Common.I_TAKED;
case Common.I_RELATED:
return Common.I_RELATED;
default:
return 0;
}
}


@Override
public int getViewTypeCount() {
// TODO Auto-generated method stub
return MAX_TYPE;
}


@Override
public View getView(int position, View convertView, ViewGroup group) {
// TODO Auto-generated method stub
IPublishedViewHolder publishViewHolder = null;
ITakedViewHolder takedViewHolder=null;
ICommentViewHolder commentViewHolder=null;
IRelatedViewHolder relatedViewHolder=null;
ResponseModle respModle = responseList.get(position);
int type = respModle.getType();
if(convertView==null){

switch(type){
case Common.I_PUBLISHED:
    convertView = inflater.inflate(R.layout.i_published, null);
    publishViewHolder = new IPublishedViewHolder();
    publishViewHolder.authouname = (TextView)convertView.findViewById(R.id.authorname);
    publishViewHolder.resp_content = (TextView)convertView.findViewById(R.id.resp_content);
    publishViewHolder.resp_promise = (TextView)convertView.findViewById(R.id.resp_promise);
    convertView.setTag(publishViewHolder);
    break;
case Common.I_TAKED:
convertView = inflater.inflate(R.layout.i_taked, null);
takedViewHolder = new ITakedViewHolder();
takedViewHolder. tk_name = (TextView)convertView.findViewById(R.id.tk_name);
takedViewHolder. tk_content = (TextView)convertView.findViewById(R.id.tk_content);
takedViewHolder. tk_promise = (TextView)convertView.findViewById(R.id.tk_promise);
convertView.setTag(takedViewHolder);
break;
case Common.I_COMMENED:
convertView = inflater.inflate(R.layout.i_commened, null);
commentViewHolder = new ICommentViewHolder();
commentViewHolder. com_name = (TextView)convertView.findViewById(R.id.com_name);
commentViewHolder. com_content = (TextView)convertView.findViewById(R.id.com_content);
commentViewHolder. com_promise = (TextView)convertView.findViewById(R.id.com_promise);
convertView.setTag(commentViewHolder);
break;
case Common.I_RELATED:
convertView = inflater.inflate(R.layout.i_related, null);
relatedViewHolder = new IRelatedViewHolder();
relatedViewHolder. related_name = (TextView)convertView.findViewById(R.id.related_name);
relatedViewHolder. relate_content = (TextView)convertView.findViewById(R.id.relate_content);
relatedViewHolder. relate_promise = (TextView)convertView.findViewById(R.id.relate_promise);
convertView.setTag(relatedViewHolder);
break;
}

}else{
switch(type){
case Common.I_PUBLISHED:
publishViewHolder = (IPublishedViewHolder)convertView.getTag();
break;
case Common.I_COMMENED:
commentViewHolder = (ICommentViewHolder)convertView.getTag();
break;
case Common.I_TAKED:
takedViewHolder = (ITakedViewHolder)convertView.getTag();
break;
case Common.I_RELATED:
relatedViewHolder = (IRelatedViewHolder)convertView.getTag();
break;
}

}
switch(type){
case Common.I_PUBLISHED:
publishViewHolder.authouname.setText(respModle.getAuthorModle().getName());
publishViewHolder.resp_content.setText(respModle.getContent());
publishViewHolder.resp_promise.setText(respModle.getPromise());
break;
case Common.I_COMMENED:
commentViewHolder.com_name.setText(respModle.getAuthorModle().getName());
commentViewHolder.com_content.setText(respModle.getContent());
commentViewHolder.com_promise.setTag(respModle.getPromise());
break;
case Common.I_TAKED:
takedViewHolder.tk_name.setText(respModle.getAuthorModle().getName());
takedViewHolder.tk_content.setText(respModle.getContent());
takedViewHolder.tk_promise.setText(respModle.getPromise());
break;
case Common.I_RELATED:
relatedViewHolder.related_name.setText(respModle.getAuthorModle().getName());
relatedViewHolder.relate_content.setText(respModle.getContent());
relatedViewHolder.relate_promise.setText(respModle.getPromise());
break;
}
return convertView;
}
class IPublishedViewHolder{
TextView authouname;
TextView resp_content ;
TextView resp_promise ;
}
class ITakedViewHolder{
TextView tk_name;
TextView tk_content;
TextView tk_promise;
}
class ICommentViewHolder{
TextView com_name;
TextView com_content;
TextView com_promise;

}
class IRelatedViewHolder{
TextView related_name;
TextView relate_content;
TextView relate_promise;
}