Android 学习之开源项目PullToRefresh的使用 _开源项目

寸阳分阴须爱惜，休负春色与时光。这篇文章主要讲述Android 学习之开源项目PullToRefresh的使用相关的知识，希望能为你提供帮助。

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首先下载 android-PullToRefresh-master

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下载地址 https://github.com/chrisbanes/Android-PullToRefresh

下载之后将其解压

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如今我们用eclipse 创建一个项目取名PullToRefresh

将上面的library 引入我们的项目
引入成功之后打开项目的project.properties文件我们能够看到
android.library.reference.1=../Android-PullToRefresh-master/library

这样就表示能够引用成功了

我们在res/layout创建布局文件main.xml

< ?
xml version="1.0" encoding="utf-8"?> < LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#FFFFFF" android:orientation="vertical" > < !--xmlns:ptr = "http://schemas.android.com/apk/res-auto"为我们要使用PullToRefresh 里面一些属性须要引的命名空间 --> < com.handmark.pulltorefresh.library.PullToRefreshListView xmlns:ptr = "http://schemas.android.com/apk/res-auto" android:id="@+id/pull_refresh_list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:dividerHeight="4dp" android:fadingEdge="none" android:fastScrollEnabled="false" android:footerDividersEnabled="false" android:headerDividersEnabled="false" android:smoothScrollbar="true" ptr:ptrMode="both" /> < /LinearLayout>

接着创建 MainActivity.java

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> 以便与监听滚动栏到顶部和究竟部 */ 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载入时的铃声（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); } //模拟网络载入数据的异步请求类 // 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(10); } catch (InterruptedException e) { } return mStrings; }//主线程更新UI @Override protected void onPostExecute(String[] result) {//向RefreshListView Item 加入一行数据并刷新ListView //mListItems.addLast("Added after refresh..."); mListItems.addFirst("Added after refresh..."); mAdapter.notifyDataSetChanged(); //通知RefreshListView 我们已经更新完毕 // 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" }; }

眼下编码已经完毕我们測试一下