下拉刷新在越来越多的app中使用，已经形成一种默认的用户习惯，遇到列表显示的内容时，用户已经开始习惯性的拉拉。在交互习惯上已经形成定性。之前在我的文章《ios学习笔记34—egotableviewpullrefresh实现下拉刷新》中介绍过如何在ios上实现下拉刷新的功能。今天主要介绍下在android上实现下拉刷新的demo，下拉控件参考自github上开源项目pulltorefresh，并做简单修改。最终效果如下：
工程结构如下：
使用过程中可以对下拉显示效果进行自定义，如果要修改顶部下拉显示，则只需修改pulllist_head.xml即可，修改底部获取更多则修改list_footview.xml即可。
接下来是在activity中使用：
复制代码 代码如下:
/**
* pulllistview
* @author ryan
*
*/
public class rtpulllistviewactivity extends activity {
private static final int internet_failure = -1;
private static final int load_success = 1;
private static final int load_more_success = 3;
private static final int no_more_info = 4;
private static final int load_new_info = 5;
private rtpulllistview pulllistview;
private progressbar moreprogressbar;
private list<string> datalist;
private arrayadapter<string> adapter;
@override
public void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.main);
pulllistview = (rtpulllistview) this.findviewbyid(r.id.pulllistview);
datalist = new arraylist<string>();
for (int i = 0; i < 5; i++) {
datalist.add("item data "+i);
}
adapter = new arrayadapter<string>(this, android.r.layout.simple_list_item_1, datalist);
pulllistview.setadapter(adapter);
//添加listview底部获取更多按钮（可自定义）
layoutinflater inflater = layoutinflater.from(this);
view view = inflater.inflate(r.layout.list_footview, null);
relativelayout footerview =(relativelayout) view.findviewbyid(r.id.list_footview);
moreprogressbar = (progressbar) view.findviewbyid(r.id.footer_progress);
pulllistview.addfooterview(footerview);
//下拉刷新监听器
pulllistview.setonrefreshlistener(new onrefreshlistener() {
@override
public void onrefresh() {
new thread(new runnable() {
@override
public void run() {
try {
//模拟数据刷新
thread.sleep(2000);
datalist.clear();
for (int i = 0; i < 5; i++) {
datalist.add("item data "+i);
}
myhandler.sendemptymessage(load_new_info);
} catch (interruptedexception e) {
e.printstacktrace();
}
}
}).start();
}
});
//获取更多监听器
footerview.setonclicklistener(new onclicklistener() {
@override
public void onclick(view v) {
moreprogressbar.setvisibility(view.visible);
new thread(new runnable() {
@override
public void run() {
try {
//模拟数据刷新
thread.sleep(2000);
for (int i = 0; i < 5; i++) {
datalist.add("new item data "+i);
}
myhandler.sendemptymessage(load_more_success);
} catch (interruptedexception e) {
e.printstacktrace();
}
}
}).start();
}
});
}
//结果处理
private handler myhandler = new handler(){
@override
public void handlemessage(message msg) {
super.handlemessage(msg);
switch (msg.what) {
case load_more_success:
moreprogressbar.setvisibility(view.gone);
adapter.notifydatasetchanged();
pulllistview.setselectionfoot();
break;
case load_new_info:
adapter.notifydatasetchanged();
pulllistview.onrefreshcomplete();
break;
default:
break;
}
}
};
}
具体使用及修改请参考demo源码：源码下载
