Android下拉刷新ListView――RTPullListView(demo)

2020-04-11 12:29:54

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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; 
} 
} 

}; 
} 