Google官方SwipeRefreshLayout下拉重新整理的用法。，swiperefreshlayout

Google官方SwipeRefreshLayout下拉重新整理的用法。，swiperefreshlayout

《Android SwipeRefreshLayout：Google官方SDK包中的下拉重新整理》
下拉重新整理在如今移動開發中應用如此廣泛和普遍，以至於Google乾脆在SDK中給予支援。在android-support-v4包中，Google增加了SwipeRefreshLayout，該組件提供基礎的下拉重新整理表現能力和開放出來供開發人員調用的基本介面。

 1 package com.lixu.SwipeRefreshLayoutyongfa; 2  3 import java.util.ArrayList; 4 import android.app.Activity; 5 import android.os.AsyncTask; 6 import android.os.Bundle; 7 import android.support.v4.widget.SwipeRefreshLayout; 8 import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener; 9 import android.widget.ArrayAdapter;10 import android.widget.ListView;11 12 public class MainActivity extends Activity {13     private ArrayAdapter<String> adapter;14     private ArrayList<String> date;15     private SwipeRefreshLayout srl;16     private int count = 0;17 18     @Override19     protected void onCreate(Bundle savedInstanceState) {20         super.onCreate(savedInstanceState);21         setContentView(R.layout.activity_main);22 23         date = new ArrayList<String>();24 25         ListView lv = (ListView) findViewById(R.id.lv);26 27         srl = (SwipeRefreshLayout) findViewById(R.id.srl);28         // 設定重新整理動畫的顏色.29         srl.setColorSchemeResources(android.R.color.holo_green_light, android.R.color.holo_blue_bright,30                 android.R.color.holo_red_light);31 32         srl.setOnRefreshListener(new OnRefreshListener() {33             // SwipeRefreshLayout接管其包裹的ListView下拉事件。34             // 每一次對ListView的下拉動作，將觸發SwipeRefreshLayout的onRefresh()。35             @SuppressWarnings("unchecked")36             @Override37             public void onRefresh() {38 39                 new MyAsyncTask().execute();40 41             }42         });43         adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, date);44 45         lv.setAdapter(adapter);46     }47 48     private class MyAsyncTask extends AsyncTask {49         @Override50         protected void onPreExecute() {51             super.onPreExecute();52             // 重新整理開始53             srl.setRefreshing(true);54         }55 56         @Override57         protected Object doInBackground(Object... params) {58             // 處理一些耗時的事件59             return count++;60         }61 62         @Override63         protected void onPostExecute(Object result) {64             super.onPostExecute(result);65             // add(0,xxx)每次將更新的資料xxx添加到頭部。66             date.add(0, "" + result);67             // 重新整理適配器68             adapter.notifyDataSetChanged();69             // 重新整理完畢70             srl.setRefreshing(false);71         }72 73     }74 75 }

xml檔案：

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     xmlns:tools="http://schemas.android.com/tools" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     tools:context="com.lixu.SwipeRefreshLayoutyongfa.MainActivity" > 6  7     <android.support.v4.widget.SwipeRefreshLayout 8         android:id="@+id/srl" 9         android:layout_width="match_parent"10         android:layout_height="match_parent" >11 12         <ListView13             android:id="@+id/lv"14             android:layout_width="match_parent"15             android:layout_height="match_parent" />16     </android.support.v4.widget.SwipeRefreshLayout>17 18 </RelativeLayout>

運行效果：