Android第三方开源PullToRefresh（系列1）

下拉刷新第三方开源github网址：https://github.com/chrisbanes/Android-PullToRefresh

效果如图：

xml文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.pulltorefresh.MainActivity" >

   <com.handmark.pulltorefresh.library.PullToRefreshListView
       android:id="@+id/pulltorefresh"
       android:layout_width="match_parent"
       android:layout_height="match_parent">
       
   </com.handmark.pulltorefresh.library.PullToRefreshListView>

</RelativeLayout>

java代码：

package com.example.pulltorefresh;

import java.util.ArrayList;
import java.util.List;

import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

	private List<String> data;
	private ArrayAdapter adapter;
	private PullToRefreshListView mPullToRefresh;
	
	private int count = 0;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		data = new ArrayList<String>();
		
		mPullToRefresh = (PullToRefreshListView) findViewById(R.id.pulltorefresh);
		
		mPullToRefresh.setMode(Mode.PULL_FROM_START);
		
		mPullToRefresh.setOnRefreshListener(new OnRefreshListener<ListView>() {

			@Override
			public void onRefresh(PullToRefreshBase<ListView> refreshView) {
				
				new MyAsyncTask().execute();
				
			}
		});
		adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1,data);
		
		mPullToRefresh.setAdapter(adapter);
	}
	private class MyAsyncTask extends AsyncTask{
		
		@Override
		protected void onPreExecute() {
			super.onPreExecute();
			
			mPullToRefresh.setRefreshing();
		}
		
		@Override
		protected Object doInBackground(Object... params) {
			
			try {
				Thread.sleep(3000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			return count++;
		}
		
		@Override
		protected void onPostExecute(Object result) {

			data.add(0,"数据"+result);
			
			adapter.notifyDataSetChanged();
			
			mPullToRefresh.setLastUpdatedLabel("最后更新时间：2015年11月24日\n"+System.currentTimeMillis());
			
			mPullToRefresh.onRefreshComplete();
		}
	}
	
}