Android 仿今日头条简单的刷新效果实例代码

点击按钮，先自动进行下拉刷新，也可以手动刷新，刷新完后，最后就多一行数据。有四个选项卡。

前两天导师要求做一个给本科学生预定机房座位的app，出发点来自这里。做着做着遇到很多问题，都解决了。这个效果感觉还不错，整理一下。

mainactivity

package com.example.fragmentmytest;
import android.content.dialoginterface;
import android.graphics.color;
import android.os.bundle;
import android.support.v4.app.fragmentactivity;
import android.support.v4.app.fragmentmanager;
import android.support.v4.app.fragmenttransaction;
import android.text.textutils;
import android.view.menu;
import android.view.menuitem;
import android.view.view;
import android.view.view.onclicklistener;
import android.widget.button;
import android.widget.textview;
import com.example.dialog.customdialog;
import com.example.dialog.customdialogchangepwd;
import com.example.dialog.customdialogsignup;
import com.example.myapplication.customapplication;
import com.example.utils.toastutils;
public class mainactivity extends fragmentactivity {
public static final string serveraddress = "http://192.168.1.101";
public static final string serverport = "8080";
onefragment onefragment;
twofragment twofragment;
threefragment threefragment;
fourfragment fourfragment;
button btn1, btn2, btn3, btn4;
onclicklistener clicklistener;
textview stu_msg;
private customapplication app;
/**
* 用于对fragment进行管理
*/
fragmentmanager fragementmanager;
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
app = (customapplication) getapplication(); // 获得customapplication对象
// 必须继承fragmentactivity才能用getsupportfragmentmanager()；最好使用v4.app，已经没怎么有人使用app中的了
fragementmanager = getsupportfragmentmanager();
init();
// 第一次启动时选中第0个tab
settabselection(0);// 不能左右滑动的默认值
}
public void init() {
stu_msg = (textview) findviewbyid(r.id.stu_msg);
btn1 = (button) findviewbyid(r.id.btn1);
btn2 = (button) findviewbyid(r.id.btn2);
btn3 = (button) findviewbyid(r.id.btn3);
btn4 = (button) findviewbyid(r.id.btn4);
clicklistener = new onclicklistener() {
public void onclick(view arg0) {
int id = arg0.getid();
switch (id) {
case r.id.btn1:
settabselection(0);
break;
case r.id.btn2:
settabselection(1);
break;
case r.id.btn3:
settabselection(2);
break;
case r.id.btn4:
settabselection(3);
break;
default:
break;
}
}
};
btn1.setonclicklistener(clicklistener);
btn2.setonclicklistener(clicklistener);
btn3.setonclicklistener(clicklistener);
btn4.setonclicklistener(clicklistener);
}
private void settabselection(int index) {
clearselection();// 每次选中之前先清楚掉上次的选中状态
// 开启一个fragment事务
fragmenttransaction transaction = fragementmanager.begintransaction();
// 先隐藏掉所有的fragment，以防止有多个fragment显示在界面上的情况
hidefragements(transaction);
switch (index) {
case 0:
btn1.setbackgroundcolor(color.parsecolor("#cfefef"));
btn1.settextcolor(color.parsecolor("#ffffff"));
app.setroom(btn1.gettext().tostring());
if (onefragment == null) {
onefragment = new onefragment();
transaction.add(r.id.framelayout, onefragment);
} else {
transaction.show(onefragment);
onefragment.mpullrefreshlistview.setrefreshing(true);
}
break;
case 1:
btn2.setbackgroundcolor(color.parsecolor("#cfefef"));
btn2.settextcolor(color.parsecolor("#ffffff"));
app.setroom(btn2.gettext().tostring());
if (twofragment == null) {
twofragment = new twofragment();
transaction.add(r.id.framelayout, twofragment);
} else {
transaction.show(twofragment);
twofragment.mpullrefreshlistview.setrefreshing(true);
}
break;
case 2:
btn3.setbackgroundcolor(color.parsecolor("#cfefef"));
btn3.settextcolor(color.parsecolor("#ffffff"));
app.setroom(btn3.gettext().tostring());
if (threefragment == null) {
threefragment = new threefragment();
transaction.add(r.id.framelayout, threefragment);
} else {
transaction.show(threefragment);
threefragment.mpullrefreshlistview.setrefreshing(true);
}
break;
case 3:
btn4.setbackgroundcolor(color.parsecolor("#cfefef"));
btn4.settextcolor(color.parsecolor("#ffffff"));
app.setroom(btn4.gettext().tostring());
if (fourfragment == null) {
fourfragment = new fourfragment();
transaction.add(r.id.framelayout, fourfragment);
} else {
transaction.show(fourfragment);
fourfragment.mpullrefreshlistview.setrefreshing(true);
}
break;
default:
break;
}
transaction.commit();
}
/**
* 清除掉所有的选中状态。
*/
private void clearselection() {
btn1.setbackgroundcolor(color.parsecolor("#efefef"));
btn1.settextcolor(color.parsecolor("#234567"));
btn2.setbackgroundcolor(color.parsecolor("#efefef"));
btn2.settextcolor(color.parsecolor("#234567"));
btn3.setbackgroundcolor(color.parsecolor("#efefef"));
btn3.settextcolor(color.parsecolor("#234567"));
btn4.setbackgroundcolor(color.parsecolor("#efefef"));
btn4.settextcolor(color.parsecolor("#234567"));
}
/**
* 将所有的fragment都置为隐藏状态。
* 
* @param transaction
* 用于对fragment执行操作的事务
*/
private void hidefragements(fragmenttransaction transaction) {
if (onefragment != null) {
transaction.hide(onefragment);
}
if (twofragment != null) {
transaction.hide(twofragment);
}
if (threefragment != null) {
transaction.hide(threefragment);
}
if (fourfragment != null) {
transaction.hide(fourfragment);
}
}
}

四个fragment都差不多，这里是第一个：

package com.example.fragmentmytest;
import java.util.arraylist;
import java.util.linkedlist;
import java.util.list;
import android.app.activity;
import android.os.asynctask;
import android.os.bundle;
import android.support.v4.app.fragment;
import android.util.log;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.adapterview;
import android.widget.arrayadapter;
import android.widget.adapterview.onitemclicklistener;
import android.widget.listview;
import com.example.adapter.myadapter;
import com.example.dao.computerroomstatus;
import com.example.utils.toastutils;
import com.handmark.pulltorefresh.library.pulltorefreshbase;
import com.handmark.pulltorefresh.library.pulltorefreshbase.mode;
import com.handmark.pulltorefresh.library.pulltorefreshbase.onrefreshlistener2;
import com.handmark.pulltorefresh.library.pulltorefreshlistview;
public class onefragment extends fragment {
string room = "204";
public pulltorefreshlistview mpullrefreshlistview;
// private arrayadapter<string> madapter;
private int mitemcount = 9;
// private linkedlist<string> mlistitems;
private myadapter madapter;
private list<computerroomstatus> data;
public view oncreateview(layoutinflater inflater, viewgroup container,
bundle savedinstancestatus) {
view view = inflater.inflate(r.layout.twolayout, container, false);
mpullrefreshlistview = (pulltorefreshlistview) view
.findviewbyid(r.id.pull_refresh_list_2);
mpullrefreshlistview.setmode(mode.pull_from_start);
return view;
}
@override
public void onviewcreated(view view, bundle savedinstancestate) {
// todo auto-generated method stub
super.onviewcreated(view, savedinstancestate);
initdatas();
// madapter1 = new myadapter(getactivity(), data);
madapter = new myadapter(getactivity(), data, room,mpullrefreshlistview);
mpullrefreshlistview.setadapter(madapter);
mpullrefreshlistview
.setonrefreshlistener(new onrefreshlistener2<listview>() {
@override
public void onpulldowntorefresh(
pulltorefreshbase<listview> refreshview) {
log.e("tag", "onpulldowntorefresh");
// 这里写下拉刷新的任务
new getdatatask().execute();
}
@override
public void onpulluptorefresh(
pulltorefreshbase<listview> refreshview) {
log.e("tag", "onpulluptorefresh");
// 这里写上拉加载更多的任务
new getdatatask().execute();
}
});
mpullrefreshlistview.setrefreshing(true);
}
private void initdatas() {
// 初始化数据和数据源
data = new arraylist<computerroomstatus>();
for (int i = 0; i < mitemcount; i++) {
data.add(new computerroomstatus(i, "1", "1", "3", "1", "1", "1"));
}
}
protected void autorefresh() {
mpullrefreshlistview.setrefreshing(true);
}
// 请求网络接口，这里是做的假数据
private class getdatatask extends asynctask<void, void, string> {
@override
protected string doinbackground(void... params) {
try {
// todo 解析json
thread.sleep(1000);
} catch (interruptedexception e) {
}
return "" + (mitemcount++);
}
@override
protected void onpostexecute(string result) {
// data.add(new
// computerroomstatus(1,result,result,result,result,result,result));
data.add(new computerroomstatus(integer.parseint(result), "", "",
"3", "1", "1", "1"));
madapter.notifydatasetchanged();
mpullrefreshlistview.onrefreshcomplete();
}
}
}

myadapter

package com.example.adapter;
import java.util.list;
import android.content.context;
import android.content.dialoginterface;
import android.content.res.colorstatelist;
import android.graphics.color;
import android.text.textutils;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.baseadapter;
import android.widget.button;
import android.widget.textview;
import com.example.dao.computerroomstatus;
import com.example.dialog.customdialogorder;
import com.example.fragmentmytest.r;
import com.example.utils.toastutils;
import com.handmark.pulltorefresh.library.pulltorefreshlistview;
public class myadapter extends baseadapter {
private context context;
private list<computerroomstatus> data;
private layoutinflater layoutinflater;
private string room;
private viewholder holder = null;
private pulltorefreshlistview mpullrefreshlistview;
public myadapter(context context, list<computerroomstatus> data, string room,pulltorefreshlistview mpullrefreshlistview) {
this.context = context;
this.data = data;
this.room = room;
this.mpullrefreshlistview = mpullrefreshlistview;
layoutinflater = layoutinflater.from(context);
}
@override
public int getcount() {
return data.size();
}
@override
public object getitem(int position) {
return data.get(position);
}
@override
public long getitemid(int position) {
return position;
}
@override
public view getview(int position, view convertview, viewgroup parent) {
if (convertview == null) {
holder = new viewholder();
convertview = layoutinflater.inflate(r.layout.lv_item, null);
holder.seatid = (textview) convertview.findviewbyid(r.id.seatid);
holder.time1 = (button) convertview.findviewbyid(r.id.time1);
holder.time2 = (button) convertview.findviewbyid(r.id.time2);
holder.time3 = (button) convertview.findviewbyid(r.id.time3);
holder.time4 = (button) convertview.findviewbyid(r.id.time4);
holder.time5 = (button) convertview.findviewbyid(r.id.time5);
holder.time6 = (button) convertview.findviewbyid(r.id.time6);
convertview.settag(holder);
} else {
holder = (viewholder) convertview.gettag();
}
// 获得集合中实体类对象
final computerroomstatus s = data.get(position);
holder.seatid.settext(s.getid() + "");
holder.time1.setonclicklistener(new lvbuttonlistener(position));
holder.time2.setonclicklistener(new lvbuttonlistener(position));
holder.time3.setonclicklistener(new lvbuttonlistener(position));
holder.time4.setonclicklistener(new lvbuttonlistener(position));
holder.time5.setonclicklistener(new lvbuttonlistener(position));
holder.time6.setonclicklistener(new lvbuttonlistener(position));
//略一部分不要紧的......
return convertview;
}
class lvbuttonlistener implements view.onclicklistener {
private int position;
lvbuttonlistener(int pos) {
position = pos;
}
@override
public void onclick(view v) {
switch (v.getid()) {
case r.id.time1:
showdialog(position, "1");
break;
case r.id.time2:
showdialog(position, "2");
break;
case r.id.time3:
showdialog(position, "3");
break;
case r.id.time4:
showdialog(position, "4");
break;
case r.id.time5:
showdialog(position, "5");
break;
case r.id.time6:
showdialog(position, "6");
break;
default:
break;
}
}
}
public void showdialog(final int id, final string witch) {
final customdialogorder.builder builder = new customdialogorder.builder(
context);
builder.settitle("预约上机");
builder.setpositivebutton("预约", new dialoginterface.onclicklistener() {
public void onclick(dialoginterface dialog, int which) {
dialog.dismiss();
// 提交的时候提交application的room和position和witch
toastutils.mytoast(context, room + ":" + id + ":" + witch);
//todo 拼接字符串 get到指定的接口
//todo 并且刷新执行下拉刷新
mpullrefreshlistview.setrefreshing(true);
}
});
builder.setnegativebutton("取消",
new android.content.dialoginterface.onclicklistener() {
public void onclick(dialoginterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
}
class viewholder {
textview seatid;
button time1, time2, time3, time4, time5, time6;
}

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