Package Com.example.zimusortlistview; Import java.util.ArrayList;
Import java.util.List;
Import Android.os.Bundle;
Import android.app.Activity;
Import Android.view.LayoutInflater;
Import Android.view.Menu;
Import Android.view.View;
Import Android.view.ViewGroup;
Import Android.widget.AdapterView;
Import Android.widget.AdapterView.OnItemClickListener;
Import Android.widget.ArrayAdapter;
Import Android.widget.BaseAdapter;
Import Android.widget.LinearLayout;
Import Android.widget.ListView;
Import Android.widget.TextView;
Import Android.widget.Toast; /**
* @author Peng Xiangming
* Load multiple layouts in the ListView
* Take the city list as an example to ensure that there are no identical elements in Cityletter and CityName, and that there are no identical elements in letter
*/
public class Mainactivity extends Activity implements onitemclicklistener{ String[] letter={"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X "," Y "," Z "};
String[] cityletter={"C", "B", "H", "G", "W", "C", "s", "s", "C", "W", "H", "Z", "C", "D", "N", "L", "Q", "s", "s"
, "L", "N", "H", "X", "H", "S", "Z", "G", "N", "J", "T", "S", "X", "A"};
String[] cityname={"Changsha", "Beijing", "Hangzhou", "Guangzhou", "Wuhan", "Chongqing", "Shanghai", "Shenzhen", "Changchun", "Urumqi", "Harbin", "Zhengzhou", "Chengdu", "Dalian", "Nanchang", "Lanzhou", "Qiqihar", " Shantou "," Suzhou "
, "Lhasa", "Nanjing", "Hohhot", "Xiamen", "Hefei", "Shenyang", "Zhangjiajie", "Guizhou", "Ningxia", "Jinan", "Tianjin", "Shijiazhuang", "Xi ' an", "Macau"};
List<string> lettertocity=new arraylist<string> ();
int count;
ListView LV;
ListView Lv1;
@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);
String str= "";
for (int i=0;i<letter.length;i++) {
Str=letter[i];
Boolean isaddletter=false;
for (int j=0;j<cityletter.length;j++) {
if (Str.equals (Cityletter[j])) {
if (!isaddletter) {
Lettertocity.add (str);
Isaddletter=true;
}
Lettertocity.add (Cityname[j]);
}
}
}
lv= (ListView) Findviewbyid (R.ID.LISTVIEW1);
Lv.setadapter (New Myadapter ());
Lv.setonitemclicklistener (this);
lv1= (ListView) Findviewbyid (R.ID.LISTVIEW2);
Lv1.setadapter (New MyAdapter1 ());
Lv1.setonitemclicklistener (this);
}
Class MyAdapter1 extends baseadapter{
@Override
public int GetCount () {
TODO auto-generated Method Stub
return letter.length;
} @Override
Public Object getItem (int position) {
TODO auto-generated Method Stub
return letter[position];
} @Override
public long getitemid (int position) {
TODO auto-generated Method Stub
return position;
} @Override
Public View GetView (int position, View Convertview, ViewGroup parent) {
View View=layoutinflater.from (mainactivity.this). Inflate (r.layout.letter_list, NULL);
TextView tv= (TextView) View.findviewbyid (R.id.letterlisttextview);
Tv.settext (Letter[position]);
return view;
}
}
Class Myadapter extends baseadapter{ final static int type_1=1;
final static int type_2=2;
@Override
public int GetCount () {
TODO auto-generated Method Stub
return Lettertocity.size ();
} @Override
Public Object getItem (int position) {
TODO auto-generated Method Stub
return Lettertocity.get (position);
} @Override
public long getitemid (int position) {
TODO auto-generated Method Stub
return position;
}
@Override
public int Getitemviewtype (int position) {
for (int i=0;i<letter.length;i++) {
if (Lettertocity.get (position). Equals (Letter[i])) {
return type_1;
}
}
return type_2;
}
@Override
public int Getviewtypecount () {
return 3;
} @Override
Public View GetView (int position, View Convertview, ViewGroup parent) {
/**
* Even though Convertview caches some layouts, when refactoring, you don't know how to get Convertview back to the layout you need, you need to
* To let adapter know what layouts I currently have, I'll refactor the layout selection rules when I refactor item so that Convertview can return to the layout you need.
* You need to rewrite the following two functions
* @Override
* public int getitemviewtype (int position) {} This function gets the type of view created in GetView
* @Override
* public int Getviewtypecount () {} returns the number of view types created in GetView
* As for the detailed use of these two methods, you can see the API
*/
ViewHolder1 Vh1=null;
ViewHolder2 Vh2=null;
int Type=getitemviewtype (position);
if (convertview==null) {
Switch (type) {
Case Type_1:
Convertview=layoutinflater.from (Mainactivity.this). Inflate (r.layout.letter, NULL);
Vh1=new ViewHolder1 ();
vh1.tv= (TextView) Convertview.findviewbyid (R.id.lettertextview);
Convertview.settag (VH1);
Break
Case type_2:
Convertview=layoutinflater.from (Mainactivity.this). Inflate (r.layout.city, NULL);
Vh2=new ViewHolder2 ();
vh2.tv= (TextView) Convertview.findviewbyid (R.id.citytextview);
Convertview.settag (VH2);
Break
Default
Break
}
}else{
Switch (type) {
Case Type_1:
vh1= (ViewHolder1) Convertview.gettag ();
Break
Case type_2:
Vh2= (ViewHolder2) Convertview.gettag ();
Break
Default
Break
}
}
Switch (type) {
Case Type_1:
Vh1.tv.setText (Lettertocity.get (position));
Break
Case type_2:
Vh2.tv.setText (Lettertocity.get (position));
Break
Default
Break
}
return convertview;
This method is not advisable and the view refreshes when refreshed
Boolean isletter=false;
for (int i=0;i<letter.length;i++) {
if (Lettertocity.get (position). Equals (Letter[i])) {
Isletter=true;
Break
// }
// }
Viewholder Vh=null;
if (convertview==null) {
Vh=new Viewholder ();
if (isletter) {
Convertview=layoutinflater.from (Mainactivity.this). Inflate (r.layout.letter, NULL);
vh.tv= (TextView) Convertview.findviewbyid (R.id.lettertextview);
}else{
Convertview=layoutinflater.from (Mainactivity.this). Inflate (r.layout.city, NULL);
vh.tv= (TextView) Convertview.findviewbyid (R.id.citytextview);
// }
Convertview.settag (VH);
}else{
VH = (Viewholder) convertview.gettag ();
// }
Vh.tv.setText (Lettertocity.get (position));
return convertview;
List of cities, modifying layouts
Boolean isletter=false;
for (int i=0;i<letter.length;i++) {
if (Lettertocity.get (position). Equals (Letter[i])) {
Isletter=true;
Break
// }
// }
View view;
Viewholder VH;
if (convertview==null) {
View=layoutinflater.from (Mainactivity.this). Inflate (r.layout.letter_city, NULL);
Vh=new Viewholder ();
vh.tv= (TextView) View.findviewbyid (R.id.lettertextview);
Vh.ll= (LinearLayout) View.findviewbyid (R.ID.LL);
Convertview=view;
Convertview.settag (VH);
}else{
view= (View) Convertview;
Vh= (Viewholder) Convertview.gettag ();
// }
Vh.tv.setText (Lettertocity.get (position));
if (isletter) {
Vh.ll.setBackgroundColor (Color.ltgray);
Vh.tv.setPadding (5, 5, Vh.tv.getPaddingRight (), 5);
}else{
Vh.ll.setBackgroundColor (Color.White);
Vh.tv.setPadding (Ten, Vh.tv.getPaddingRight (), 10);
// }
return view;
}
} @Override
public void Onitemclick (adapterview<?> parent, view view, int position,
Long id) {
Switch (Parent.getid ()) {
Case R.ID.LISTVIEW1:
Boolean isletter=false;
for (int i=0;i<letter.length;i++) {
if (Letter[i].equals (lettertocity.get (position))) {
Isletter=true;
Break
}
}
if (!isletter) {
Toast.maketext (this, lettertocity.get (position), Toast.length_short). Show ();
}
Break
Case R.ID.LISTVIEW2:
for (int i=0;i<lettertocity.size (); i++) {
if (Letter[position].equals (Lettertocity.get (i))) {
Lv.setselection (i);
Break
}
}
Break
Default
Break
}
}
} Class viewholder{
TextView TV;
LinearLayout ll;
}
Class viewholder1{
TextView TV;
}
Class viewholder2{
TextView TV;
} |
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