Android学习之开源项目PullToRefresh的使用(android开发最全教程)

发布时间：2024-02-27

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首先下载 Android-PullToRefresh-master

下载地址我们用eclipse 创建一个项目取名PullToRefresh

将上面的library 引入我们的项目

Android学习之开源项目PullToRefresh的使用(android开发最全教程)

引入成功之后打开项目的project.properties文件我们可以看到

android.library.reference.1=../Android-PullToRefresh-master/library

这样就表示可以引用成功了

我们在res/layout创建布局文件main.xml

view sourceprint?.<?xml version="1.0" encoding="utf-8"?>.<LinearLayout xmlns:android=" >. ..<com.handmark.pulltorefresh.library.PullToRefreshListView.xmlns:ptr = " MainActivity.java

view sourceprint?.package com.pulltorefresh;. .import java.util.Arrays;.import java.util.LinkedList;. .import android.app.Activity;.import android.os.AsyncTask;.import android.os.Bundle;.import android.widget.ArrayAdapter;.import android.widget.ListView;.import android.widget.Toast;. .import com.handmark.pulltorefresh.library.PullToRefreshBase;.import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;.import com.handmark.pulltorefresh.library.PullToRefreshBase.State;.import com.handmark.pulltorefresh.library.PullToRefreshListView;.import com.handmark.pulltorefresh.library.extras.SoundPullEventListener;. . . .public class MainActivity extends Activity {. . .static final int MENU_MANUAL_REFRESH = 0;.static final int MENU_DISABLE_SCROLL = 1;.static final int MENU_SET_MODE = 2;.static final int MENU_DEMO = 3;. .private LinkedList<String> mListItems;.private PullToRefreshListView mPullRefreshListView;.private ArrayAdapter<String> mAdapter;. .@Override.protected void onCreate(Bundle savedInstanceState) {.super.onCreate(savedInstanceState);.setContentView(R.layout.main);.mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);. . ./**.* 实现接口 OnRefreshListener2<ListView> 以便与监听滚动条到顶部和到底部.*/.mPullRefreshListView.setOnRefreshListener(new OnRefreshListener2<ListView>() {.@Override.public void onPullDownToRefresh( PullToRefreshBase<ListView> refreshView) {.Toast.makeText(MainActivity.this, "onPullDownToRefresh", Toast.LENGTH_SHORT).show();.new GetDataTask().execute();.}.@Override.public void onPullUpToRefresh( PullToRefreshBase<ListView> refreshView) {.Toast.makeText(MainActivity.this, "onPullUpToRefresh", Toast.LENGTH_SHORT).show();.new GetDataTask().execute();.}.});. . . .ListView actualListView = mPullRefreshListView.getRefreshableView();. .// Need to use the Actual ListView when registering for Context Menu.registerForContextMenu(actualListView);. .mListItems = new LinkedList<String>();.mListItems.addAll(Arrays.asList(mStrings));. .mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems);. ./**.* Add Sound Event Listener.*/. ./**.* 设置下拉刷新和上拉加载时的铃声（可有可无）.*/.SoundPullEventListener<ListView> soundListener = new SoundPullEventListener<ListView>(this);.soundListener.addSoundEvent(State.PULL_TO_REFRESH, R.raw.pull_event);.soundListener.addSoundEvent(State.RESET, R.raw.reset_sound);.soundListener.addSoundEvent(State.REFRESHING, R.raw.refreshing_sound);.mPullRefreshListView.setOnPullEventListener(soundListener);. .// You can also just use setListAdapter(mAdapter) or.// mPullRefreshListView.setAdapter(mAdapter).actualListView.setAdapter(mAdapter);. . . .}.//模拟网络加载数据的异步请求类.//.private class GetDataTask extends AsyncTask<Void, Void, String[]> {. .//子线程请求数据.@Override.protected String[] doInBackground(Void... params) {.// Simulates a background job..try {.Thread.sleep();.} catch (InterruptedException e) {.}.return mStrings;.}. .//主线程更新UI.@Override.protected void onPostExecute(String[] result) {. .//向RefreshListView Item 添加一行数据并刷新ListView.//mListItems.addLast("Added after refresh...");.mListItems.addFirst("Added after refresh...");.mAdapter.notifyDataSetChanged();. .//通知RefreshListView 我们已经更新完成.// Call onRefreshComplete when the list has been refreshed..mPullRefreshListView.onRefreshComplete();. .super.onPostExecute(result);.}.}. . . .//数据源.private String[] mStrings = { "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",."Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",."Allgauer Emmentaler", "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",."Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale", "Aisy Cendre",."Allgauer Emmentaler" };.}

目前编码已经完成我们测试一下

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