Android sets different la s for the items in ListView

Android sets different la s for the items in ListView

MainActivity is as follows:

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 description:

* Set different la s for the items in ListView.

* For example, in this example, the first Item of ListView displays

* The image and other items are displayed in text.

*

* To achieve this, you need to rewrite

* 1 getViewTypeCount () and getItemViewType (int position) methods.

* 1.1 specify several different items in getViewTypeCount.

* 2 is returned here.

* 1.2 In getItemViewType (int position), the position must be different.

* Different types are returned.

* 2 set the layout for items of different types in the getView () method

* 2.1 The Type code when the current position is obtained:

* CurrentType = getItemViewType (position );

* 2.2 set layout for items based on different types

*

* References:

* 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

Private ArrayList

@ Override

Protected void onCreate (Bundle savedInstanceState ){

Super. onCreate (savedInstanceState );

SetContentView (R. layout. main );

Init ();

}

Private void init (){

MArrayList = new ArrayList

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

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 );

}

}

}

The ListViewAdapter is as follows:

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> 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> data, int resource, String [] from, int [] ){

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;

// Obtain the Type corresponding to the current position

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;

}

// ViewHolder of the first Item

Private class FirstItemViewHolder {

ImageView imageView;

}

// ViewHolder of other items except the first Item

Private class OthersViewHolder {

TextView textView;

}

}