Android下拉刷新ListView――RTPullListView(demo)

2020-04-11 12:29:54

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供稿：網(wǎng)友

下拉刷新在越來越多的App中使用，已經(jīng)形成一種默認(rèn)的用戶習(xí)慣，遇到列表顯示的內(nèi)容時，用戶已經(jīng)開始習(xí)慣性的拉拉。在交互習(xí)慣上已經(jīng)形成定性。之前在我的文章《IOS學(xué)習(xí)筆記34―EGOTableViewPullRefresh實現(xiàn)下拉刷新》中介紹過如何在IOS上實現(xiàn)下拉刷新的功能。今天主要介紹下在Android上實現(xiàn)下拉刷新的Demo，下拉控件參考自Github上開源項目PullToRefresh，并做簡單修改。最終效果如下：

工程結(jié)構(gòu)如下：

使用過程中可以對下拉顯示效果進行自定義，如果要修改頂部下拉顯示，則只需修改pulllist_head.xml即可，修改底部獲取更多則修改list_footview.xml即可。

接下來是在Activity中使用：

復(fù)制代碼代碼如下:

 
/** 
* 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底部獲取更多按鈕（可自定義） 
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); 

//下拉刷新監(jiān)聽器 
pullListView.setonRefreshListener(new OnRefreshListener() { 

@Override 
public void onRefresh() { 
new Thread(new Runnable() { 

@Override 
public void run() { 
try { 
//模擬數(shù)據(jù)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(); 
} 
}); 

//獲取更多監(jiān)聽器 
footerView.setOnClickListener(new OnClickListener() { 

@Override 
public void onClick(View v) { 
moreProgressBar.setVisibility(View.VISIBLE); 

new Thread(new Runnable() { 

@Override 
public void run() { 
try { 
//模擬數(shù)據(jù)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(); 
} 
}); 
} 
//結(jié)果處理 
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; 
} 
} 

}; 
} 