池舒欣个人资料,简报怎么写,破茧天魔1
如图是效果图
是仿饿了的点餐界面
1.点击左侧的listview，通过在在适配器中设置item来改变颜色，再通过notifydatasetinvalidated来刷新并用lv_home.setselection(showtitle.get(arg2));来关联右侧的
2.右侧的主要是重写下onscroll的方法；来改变左侧listview的颜色及背景
不过程序中还有个问题，望大神解答就是我右侧的listview下拉时，上面的textview能改变；但是上拉时，textview的不能及时改变应为滑动时我只拿了firstvisibleitem来判断的
demo的连接：
如下是主程序代码
我要评论
package com.item.jiejie;
import java.util.arraylist;
import java.util.list;
import com.item.jiejie.adapter.homeadapter;
import com.item.jiejie.adapter.menuadapter;
import com.item.jiejie.entity.fooddata;
import android.widget.abslistview.onscrolllistener;
import android.os.bundle;
import android.app.activity;
import android.text.textutils;
import android.util.log;
import android.view.view;
import android.view.window;
import android.widget.adapterview;
import android.widget.adapterview.onitemclicklistener;
import android.widget.abslistview;
import android.widget.listview;
import android.widget.textview;
/**
* 防饿了的listview联动的demo
* 有bug
* @author administrator
*
*/
public class mainactivity extends activity {
/**左侧菜单*/
private listview lv_menu;
/**右侧主菜*/
private listview lv_home;
private textview tv_title;
private menuadapter menuadapter;
private homeadapter homeadapter;
private int currentitem;
/**
* 数据源
*/
private list<fooddata> fooddatas;
private string data[] = {"热销榜","新品套餐","便当套餐","单点菜品","饮料类","水果罐头","米饭"};
/**
* 里面存放右边listview需要显示标题的条目position
*/
private arraylist<integer> showtitle;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
requestwindowfeature(window.feature_no_title);
setcontentview(r.layout.activity_main);
setview();
setdata();
}
private void setview() {
// todo auto-generated method stub
lv_menu = (listview)findviewbyid(r.id.lv_menu);
tv_title = (textview)findviewbyid(r.id.tv_titile);
lv_home = (listview)findviewbyid(r.id.lv_home);
fooddatas = new arraylist<fooddata>();
for(int i =0;i < data.length; i++){
fooddatas.add(new fooddata(i, data[0] + i, data[0]));
}
for(int i =0;i < data.length -1; i++){
fooddatas.add(new fooddata(i, data[1] + i, data[1]));
}
for(int i =0;i < data.length-2; i++){
fooddatas.add(new fooddata(i, data[2] + i, data[2]));
}
for(int i =0;i < data.length-3; i++){
fooddatas.add(new fooddata(i, data[3] + i, data[3]));
}
for(int i =0;i < data.length-4; i++){
fooddatas.add(new fooddata(i, data[4] + i, data[4]));
}
for(int i =0;i < data.length-3; i++){
fooddatas.add(new fooddata(i, data[5] + i, data[5]));
}
for(int i =0;i < 6; i++){
fooddatas.add(new fooddata(i, data[6] + i, data[6]));
}
showtitle = new arraylist<integer>();
for(int i = 0; i < fooddatas.size(); i++){
if( i ==0){
showtitle.add(i );
system.out.println(i + "dd");
}else if (!textutils.equals(fooddatas.get(i).gettitle(), fooddatas.get(i - 1).gettitle())) {
showtitle.add(i );
system.out.println(i + "dd");
}
}
}
private void setdata() {
// todo auto-generated method stub
tv_title.settext(fooddatas.get(0).gettitle());
menuadapter = new menuadapter(this);
homeadapter = new homeadapter(this, fooddatas);
lv_menu.setadapter(menuadapter);
lv_home.setadapter(homeadapter);
lv_menu.setonitemclicklistener(new onitemclicklistener() {
@override
public void onitemclick(adapterview<?> arg0, view arg1, int arg2,
long arg3) {
// todo auto-generated method stub
menuadapter.setselectitem(arg2);
menuadapter.notifydatasetinvalidated();
lv_home.setselection(showtitle.get(arg2));
tv_title.settext(data[arg2]);
}
});
lv_home.setonscrolllistener(new onscrolllistener() {
private int scrollstate;
@override
public void onscrollstatechanged(abslistview view, int scrollstate) {
// todo auto-generated method stub
//system.out.println("onscrollstatechanged" + " scrollstate" + scrollstate);
this.scrollstate = scrollstate;
}
@override
public void onscroll(abslistview view, int firstvisibleitem,
int visibleitemcount, int totalitemcount) {
// todo auto-generated method stub
if (scrollstate == abslistview.onscrolllistener.scroll_state_idle) {
return;
}
log.d("jiejie", "onscroll" + " firstvisibleitem" + firstvisibleitem
+" visibleitemcount" + visibleitemcount + " totalitemcount" + totalitemcount);
int current =showtitle.indexof(firstvisibleitem );
system.out.println(current + "dd" + firstvisibleitem);
// lv_home.setselection(current);
if(currentitem != current && current >=0){
currentitem = current;
tv_title.settext(data[current]);
menuadapter.setselectitem(currentitem);
menuadapter.notifydatasetinvalidated();
}
}
});
}
}
左侧listview的适配器代码
package com.item.jiejie.adapter;
import com.item.jiejie.r;
import android.content.context;
import android.graphics.color;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.textview;
/**
* 左侧菜单listview的适配器
* @author administrator
*
*/
public class menuadapter extends baseadapter{
private context context;
private int selectitem = 0;
private string data[] = {"热销榜","新品套餐","便当套餐","单点菜品","饮料类","水果罐头","米饭"};
public menuadapter(context context) {
this.context = context;
}
public int getselectitem() {
return selectitem;
}
public void setselectitem(int selectitem) {
this.selectitem = selectitem;
}
@override
public int getcount() {
// todo auto-generated method stub
return data.length;
}
@override
public object getitem(int arg0) {
// todo auto-generated method stub
return null;
}
@override
public long getitemid(int arg0) {
// todo auto-generated method stub
return 0;
}
@override
public view getview(int arg0, view arg1, viewgroup arg2) {
// todo auto-generated method stub
viewholder holder = null;
if(arg1 == null) {
holder = new viewholder();
arg1 = view.inflate(context, r.layout.item_menu, null);
holder.tv_name = (textview)arg1.findviewbyid(r.id.item_name);
arg1.settag(holder);
}else {
holder = (viewholder)arg1.gettag();
}
if(arg0 == selectitem){
holder.tv_name.setbackgroundcolor(color.white);
holder.tv_name.settextcolor(context.getresources().getcolor(r.color.text_green));
}else {
holder.tv_name.setbackgroundcolor(context.getresources().getcolor(r.color.ll_coachback));
holder.tv_name.settextcolor(context.getresources().getcolor(r.color.text_deep));
}
holder.tv_name.settext(data[arg0]);
return arg1;
}
static class viewholder{
private textview tv_name;
}
}
右侧的适配器代码
package com.item.jiejie.adapter;
import java.util.list;
import com.item.jiejie.r;
import com.item.jiejie.entity.fooddata;
import android.content.context;
import android.text.textutils;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.textview;
/**
* 右侧主界面listview的适配器
*
* @author administrator
*
*/
public class homeadapter extends baseadapter {
private context context;
private list<fooddata> fooddatas;
public homeadapter(context context, list<fooddata> fooddatas) {
this.context = context;
this.fooddatas = fooddatas;
}
@override
public int getcount() {
// todo auto-generated method stub
if(fooddatas!=null){
return fooddatas.size();
}else {
return 10;
}
}
@override
public object getitem(int arg0) {
// todo auto-generated method stub
return null;
}
@override
public long getitemid(int arg0) {
// todo auto-generated method stub
return 0;
}
@override
public view getview(int arg0, view arg1, viewgroup arg2) {
// todo auto-generated method stub
viewhold holder = null;
if(arg1 == null){
arg1 = view.inflate(context, r.layout.item_home, null);
holder = new viewhold();
holder.tv_title = (textview)arg1.findviewbyid(r.id.item_home_title);
holder.tv_name = (textview)arg1.findviewbyid(r.id.item_home_name);
arg1.settag(holder);
}else {
holder = (viewhold)arg1.gettag();
}
holder.tv_name.settext(fooddatas.get(arg0).getname());
holder.tv_title.settext(fooddatas.get(arg0).gettitle());
if(arg0 == 0){
holder.tv_title.setvisibility(view.visible);
}else if (!textutils.equals(fooddatas.get(arg0).gettitle(), fooddatas.get(arg0 -1).gettitle())) {
holder.tv_title.setvisibility(view.visible);
}else {
holder.tv_title.setvisibility(view.gone);
}
return arg1;
}
private static class viewhold{
private textview tv_title;
private textview tv_name;
}
}
以上所述是小编给大家介绍的仿饿了点餐界面2个listview联动效果，希望对大家有所帮助
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