package cc.testlistview;
import java.util.ArrayList;
import java.util.HashMap;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.app.Activity;
/**
* Demo描述:
* 为ListView的Item设置不同的布局.
* 例如在该例子中ListView的第一个Item显示一张
* 图片,其余的Item都显示文字.
*
* 为了达到此目的需要重写BaseAdapter中的
* 1 getViewTypeCount()和getItemViewType(int position)方法.
* 1.1在getViewTypeCount中指定一共有几种不同的item
* 在此返回2即可.
* 1.2在getItemViewType(int position)中需要依据position的不同
* 返回不同的Type.
* 2 在getView()方法中针对不同的Type为Item设置布局
* 2.1得到当前位置(position)时的Type即代码:
* currentType= getItemViewType(position);
* 2.2依据Type的不同为Item设置布局
*
* 参考资料:
* 1 http://blog.csdn.net/yueyue369/article/details/6115552
* 2 http://blog.sina.com.cn/s/blog_5da93c8f0100wx4v.html
* Thank you very much
*/
public class MainActivity extends Activity {
private ListView mListView;
private HashMap<String, Object> mHashMap;
private ArrayList<HashMap<String, Object>> mArrayList;
@Override
protected void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
private void init(){
mArrayList= new ArrayList<HashMap<String,Object>>();
mListView=(ListView) findViewById(R.id.listview);
addDataForListView();
mListView.setAdapter
( new ListViewAdapter(MainActivity. this , mArrayList, R.layout.othersitem, new String []{ "content" }, new int []{R.id.textView}));
mListView.setOnItemClickListener( new ItemClickListenerImpl());
}
private void addDataForListView(){
for ( int i = 0 ; i < 30 ; i++) {
mHashMap= new HashMap<String, Object>();
mHashMap.put( "content" , "This is ---> " +i);
mArrayList.add(mHashMap);
}
}
private class ItemClickListenerImpl implements OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long arg) {
System.out.println( "OnItemClickListener position=" +position);
}
}
}
ListViewAdapter如下:
package cc.testlistview;
import java.util.List;
import java.util.Map;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class ListViewAdapter extends BaseAdapter {
private List<? extends Map<String, ?>> mArrayList;
private int resource;
private LayoutInflater mLayoutInflater;
private final int TYPE_COUNT= 2 ;
private final int FIRST_TYPE= 0 ;
private final int OTHERS_TYPE= 1 ;
private int currentType;
public ListViewAdapter(Context context,List<? extends Map<String, ?>> data, int resource, String[] from, int [] to) {
this .mArrayList=data;
this .resource=resource;
mLayoutInflater=(LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
if (mArrayList== null ) {
return 0 ;
} else {
return (mArrayList.size()+ 1 );
}
}
@Override
public Object getItem( int position) {
if (mArrayList== null ) {
return null ;
} else {
if (position> 0 ) {
return mArrayList.get(position- 1 );
} else {
return mArrayList.get(position+ 1 );
}
}
}
@Override
public long getItemId( int position) {
return position;
}
///
@Override
public int getViewTypeCount() {
return TYPE_COUNT;
}
@Override
public int getItemViewType( int position) {
if (position== 0 ) {
return FIRST_TYPE;
} else {
return OTHERS_TYPE;
}
}
///
@Override
public View getView( int position, View convertView, ViewGroup parent) {
View firstItemView = null ;
View othersItemView= null ;
//获取到当前位置所对应的Type
currentType= getItemViewType(position);
System.out.println( "type=" +currentType);
if (currentType== FIRST_TYPE) {
firstItemView = convertView;
FirstItemViewHolder firstItemViewHolder= null ;
if (firstItemView== null ) {
System.out.println( "firstItemView==null " );
firstItemView = mLayoutInflater.inflate(R.layout.firstitem, null );
firstItemView.setOnClickListener( new OnClickListener() {
@Override
public void onClick(View view) {
System.out.println( "=====click first item=======" );
}
});
firstItemViewHolder= new FirstItemViewHolder();
firstItemViewHolder.imageView=(ImageView) firstItemView.findViewById(R.id.imageView);
firstItemView.setTag(firstItemViewHolder);
} else {
System.out.println( "firstItemView!=null " );
System.out.println( "111 getClass=" +firstItemView.getTag().getClass().toString());
firstItemViewHolder=(FirstItemViewHolder) firstItemView.getTag();
}
if (firstItemViewHolder.imageView!= null ) {
firstItemViewHolder.imageView.setImageResource(R.drawable.ic_launcher);
}
convertView=firstItemView;
} else {
othersItemView = convertView;
OthersViewHolder othersViewHolder= null ;
if (othersItemView== null ) {
System.out.println( "othersItemView==null " );
othersItemView = mLayoutInflater.inflate(R.layout.othersitem, null );
othersViewHolder= new OthersViewHolder();
othersViewHolder.textView=(TextView) othersItemView.findViewById(R.id.textView);
othersItemView.setTag(othersViewHolder);
} else {
System.out.println( "othersItemView!=null " );
System.out.println( "222 getClass=" +othersItemView.getTag().getClass().toString());
othersViewHolder=(OthersViewHolder) othersItemView.getTag();
}
if (mArrayList!= null ) {
if (othersViewHolder.textView!= null ) {
othersViewHolder.textView.setText((String)(mArrayList.get(position- 1 ).get( "content" )));
}
}
convertView=othersItemView;
}
return convertView;
}
//第一个Item的ViewHolder
private class FirstItemViewHolder{
ImageView imageView;
}
//除第一个Item以外其余Item的ViewHolder
private class OthersViewHolder{
TextView textView;
}
}
