開源項地址:https://github.com/chrisbanes/Android-PullToRefresh
在Android-PullToRefresh-master文件夾下,我們會看到還有三個文件夾:extras,
library,sample。其中sample就是作者爲我們提供的Demo,library是我們在使用Sample必須用到的jar。extras中是使用ListFragment和ViewPage用到的jar。
裏面有三個庫工程分別導入到eclipse中:
最主要的還是library庫工程
創建自己工程project,然後查看project的properties->android項,在下面添加依賴庫
然後就可以使用了
最基本的使用:
xml文件:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/pull_refresh_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>
聲明瞭一個PullToRefreshListView,裏面所有的屬性都是ListView的,沒有任何其他屬性,當然了PullToRefreshListView也提供了很多配置的屬性,後面會詳細介紹。
package com.hust.mydemo;
import java.util.Arrays;
import java.util.LinkedList;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnLastItemVisibleListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import android.R.integer;
import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.AndroidCharacter;
import android.text.format.DateUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends Activity {
PullToRefreshListView mPullToRefreshListView;//下列刷新list
ListView actualListView;
LinkedList<String> listItems;//數據
ArrayAdapter<String> adapter;//適配器
private String[] mStrings = {
"ListItem_00", "ListItem_01", "ListItem_02", "ListItem_03","ListItem_04",
"ListItem_05", "ListItem_06", "ListItem_07", "ListItem_08","ListItem_09",
"ListItem_10", "ListItem_11", "ListItem_12", "ListItem_13", "ListItem_14",
"ListItem_15", "ListItem_16", "ListItem_17", "ListItem_18", "ListItem_19" };
int i=0,j=20;
/**刷新模式,
* 包括{
* 1.DISABLED(0x0) 禁止通過手勢和手動執行
* 2.PULL_FROM_START(0x1) 可執行下拉刷新
* 3.PULL_FROM_END(0x2) 可執行上拉刷新
* 3.BOTH(0x3) 上下都可執行
* 4.MANUAL_REFRESH_ONLY(0x4) 禁止通過手勢執行,但可以手動設置
* }*/
static final int MENU_SET_MODE = 2;
/**這裏我們來判斷是下拉還是上拉*/
private Mode CurrentMode;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initData();
/*
//監聽列表被刷新時事件
mPullToRefreshListView.setOnRefreshListener(new OnRefreshListener<ListView>() {
@Override
public void onRefresh(PullToRefreshBase<ListView> refreshView) {
//設置下拉時顯示的日期和時間
String label=DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME|DateUtils.FORMAT_SHOW_DATE|DateUtils.FORMAT_ABBREV_ALL);
// 更新顯示的label
mPullToRefreshListView.getLoadingLayoutProxy().setLastUpdatedLabel(label);
// 執行加載更多數據任務.
new GetDataTask().execute();
}
});*/
mPullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(
PullToRefreshBase<ListView> refreshView) {
//設置下拉時顯示的日期和時間
String label=DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME|DateUtils.FORMAT_SHOW_DATE|DateUtils.FORMAT_ABBREV_ALL);
// 更新顯示的label
mPullToRefreshListView.getLoadingLayoutProxy().setLastUpdatedLabel(label);
CurrentMode=refreshView.getCurrentMode();
// 執行加載更多數據任務.
new GetDataTask().execute();
}
@Override
public void onPullUpToRefresh(
PullToRefreshBase<ListView> refreshView) {
//設置下拉時顯示的日期和時間
String label=DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME|DateUtils.FORMAT_SHOW_DATE|DateUtils.FORMAT_ABBREV_ALL);
// 更新顯示的label
mPullToRefreshListView.getLoadingLayoutProxy().setLastUpdatedLabel(label);
CurrentMode=refreshView.getCurrentMode();
// 執行加載更多數據任務.
new GetDataTask().execute();
}
});
//監聽滑動到底部的事件
mPullToRefreshListView.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {
@Override
public void onLastItemVisible() {
Toast.makeText(MainActivity.this,
"已到列表底部!", Toast.LENGTH_SHORT).show();
}
});
}
public void initView(){
mPullToRefreshListView=(PullToRefreshListView) findViewById(R.id.pull_refresh_list);
//通過getRefreshableView()來得到一個listview對象
actualListView=mPullToRefreshListView.getRefreshableView();
}
/**
* 設置listview的適配器
*/
public void initData(){
listItems=new LinkedList<String>();
listItems.addAll(Arrays.asList(mStrings));
//把string數組中的string添加到鏈表中
adapter=new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, listItems);
actualListView.setAdapter(adapter);
}
/**
* @author:tuke
* @tips :通過異步任務來加載網絡中的數據,進行更新
*
*/
private class GetDataTask extends AsyncTask<Void, Void, String[]> {
@Override
protected String[] doInBackground(Void... params) {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
}
return mStrings;
}
@Override
protected void onPostExecute(String[] result) {
//這裏是提供給我們比較MODE的方法,返回0則表示相當
if (CurrentMode.compareTo(Mode.PULL_FROM_START)==0) {
listItems.addFirst("ListItem_"+--i);
}else {
listItems.addLast("ListItem_"+(j++));
}
adapter.notifyDataSetChanged();
//當數據加載完成,需要調用onRefreshComplete.
mPullToRefreshListView.onRefreshComplete();
super.onPostExecute(result);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
switch (id) {
case R.id.pullfromstart:
mPullToRefreshListView.setMode(Mode.PULL_FROM_START);
break;
case R.id.pullfromend:
mPullToRefreshListView.setMode(Mode.PULL_FROM_END);
break;
case R.id.both:
mPullToRefreshListView.setMode(Mode.BOTH);
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
}
說白了,重要的地方就是設置模式,和設置監聽器,1,設置Mode
Java代碼 收藏代碼
PullToRefreshListView mListView = (PullToRefreshListView) findViewById(R.id.list_view);
mListView.setMode(Mode.BOTH);
Mode.BOTH:同時支持上拉下拉Mode.PULL_FROM_START:只支持下拉Pulling Down
Mode.PULL_FROM_END:只支持上拉Pulling Up
2,實現Listener
如果Mode設置成Mode.BOTH,需要設置刷新Listener爲OnRefreshListener2,並實現onPullDownToRefresh()、onPullUpToRefresh()兩個方法。
如果Mode設置成Mode.PULL_FROM_START或Mode.PULL_FROM_END,需要設置刷新Listener爲OnRefreshListener,同時實現onRefresh()方法。
當然也可以設置爲OnRefreshListener2,但是Mode.PULL_FROM_START的時候只調用onPullDownToRefresh()方法,Mode.PULL_FROM的時候只調用onPullUpToRefresh()方法.
如果我們想改變下拉刷新的HeaderLayout的文字,文字顏色,背景,加載圖標怎麼辦?
1,在java代碼方法的設置:
可以在初始化完成mPullRefreshListView後,通過mPullRefreshListView.getLoadingLayoutProxy()可以得到一個ILoadingLayout對象,這個對象可以設置各種指示器中的樣式、文本等。
ILoadingLayout startLabels = mPullRefreshListView
.getLoadingLayoutProxy();
startLabels.setPullLabel("你可勁拉,拉...");// 剛下拉時,顯示的提示
startLabels.setRefreshingLabel("好嘞,正在刷新...");// 刷新時
startLabels.setReleaseLabel("你敢放,我就敢刷新...");// 下來達到一定距離時,顯示的提示
默認是上拉和下拉的字同時改變的,如果我希望單獨改變呢?
private void initIndicator()
{
ILoadingLayout startLabels = mPullRefreshListView
.getLoadingLayoutProxy(true, false);
startLabels.setPullLabel("你可勁拉,拉...");// 剛下拉時,顯示的提示
startLabels.setRefreshingLabel("好嘞,正在刷新...");// 刷新時
startLabels.setReleaseLabel("你敢放,我就敢刷新...");// 下來達到一定距離時,顯示的提示
ILoadingLayout endLabels = mPullRefreshListView.getLoadingLayoutProxy(
false, true);
endLabels.setPullLabel("你可勁拉,拉2...");// 剛下拉時,顯示的提示
endLabels.setRefreshingLabel("好嘞,正在刷新2...");// 刷新時
endLabels.setReleaseLabel("你敢放,我就敢刷新2...");// 下來達到一定距離時,顯示的提示
}
mPullRefreshListView.getLoadingLayoutProxy(true, false);接收兩個參數,爲true,false返回設置下拉的ILoadingLayout;爲false,true返回設置上拉的。2,library類工程中爲pulltorefresh提供了很多自定義屬性
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="PullToRefresh">
<!-- A drawable to use as the background of the Refreshable View -->
<!-- 設置刷新view的背景 -->
<attr name="ptrRefreshableViewBackground" format="reference|color" />
<!-- A drawable to use as the background of the Header and Footer Loading Views -->
<!-- 設置頭部view的背景 -->
<attr name="ptrHeaderBackground" format="reference|color" />
<!-- Text Color of the Header and Footer Loading Views -->
<!-- 設置頭部/底部文字的顏色 -->
<attr name="ptrHeaderTextColor" format="reference|color" />
<!-- Text Color of the Header and Footer Loading Views Sub Header -->
<!-- 設置頭部/底部副標題的文字顏色 -->
<attr name="ptrHeaderSubTextColor" format="reference|color" />
<!-- Mode of Pull-to-Refresh that should be used -->
<!-- 設置下拉刷新的模式,有多重方式可選。無刷新功能,從頂部刷新,從底部刷新,二者都有,只允許手動刷新 -->
<attr name="ptrMode">
<flag name="disabled" value="0x0" />
<flag name="pullFromStart" value="0x1" />
<flag name="pullFromEnd" value="0x2" />
<flag name="both" value="0x3" />
<flag name="manualOnly" value="0x4" />
<!-- These last two are depreacted -->
<!-- 這兩個屬性不推薦了,用上面的代替即可 -->
<flag name="pullDownFromTop" value="0x1" />
<flag name="pullUpFromBottom" value="0x2" />
</attr>
<!-- Whether the Indicator overlay(s) should be used -->
<!-- 是否顯示指示箭頭 -->
<attr name="ptrShowIndicator" format="reference|boolean" />
<!-- Drawable to use as Loading Indicator. Changes both Header and Footer. -->
<!-- 指示箭頭的圖片 -->
<attr name="ptrDrawable" format="reference" />
<!-- Drawable to use as Loading Indicator in the Header View. Overrides value set in ptrDrawable. -->
<!-- 頂部指示箭頭的圖片,設置後會覆蓋ptrDrawable中頂部的設置 -->
<attr name="ptrDrawableStart" format="reference" />
<!-- Drawable to use as Loading Indicator in the Fooer View. Overrides value set in ptrDrawable. -->
<!-- 底部指示箭頭的圖片,設置後會覆蓋ptrDrawable中底部的設置 -->
<attr name="ptrDrawableEnd" format="reference" />
<!-- Whether Android's built-in Over Scroll should be utilised for Pull-to-Refresh. -->
<attr name="ptrOverScroll" format="reference|boolean" />
<!-- Base text color, typeface, size, and style for Header and Footer Loading Views -->
<!-- 設置文字的基本字體 -->
<attr name="ptrHeaderTextAppearance" format="reference" />
<!-- Base text color, typeface, size, and style for Header and Footer Loading Views Sub Header -->
<!-- 設置副標題的基本字體 -->
<attr name="ptrSubHeaderTextAppearance" format="reference" />
<!-- Style of Animation should be used displayed when pulling. -->
<!-- 設置下拉時標識圖的動畫,默認爲rotate -->
<attr name="ptrAnimationStyle">
<flag name="rotate" value="0x0" />
<flag name="flip" value="0x1" />
</attr>
<!-- Whether the user can scroll while the View is Refreshing -->
<!-- 設置刷新時是否允許滾動,一般爲true -->
<attr name="ptrScrollingWhileRefreshingEnabled" format="reference|boolean" />
<!--
Whether PullToRefreshListView has it's extras enabled. This allows the user to be
able to scroll while refreshing, and behaves better. It acheives this by adding
Header and/or Footer Views to the ListView.
-->
<!-- 允許在listview中添加頭/尾視圖 -->
<attr name="ptrListViewExtrasEnabled" format="reference|boolean" />
<!--
Whether the Drawable should be continually rotated as you pull. This only
takes effect when using the 'Rotate' Animation Style.
-->
<!-- 當設置rotate時,可以用這個來設置刷新時旋轉的圖片 -->
<attr name="ptrRotateDrawableWhilePulling" format="reference|boolean" />
<!-- BELOW HERE ARE DEPRECEATED. DO NOT USE. -->
<attr name="ptrAdapterViewBackground" format="reference|color" />
<attr name="ptrDrawableTop" format="reference" />
<attr name="ptrDrawableBottom" format="reference" />
</declare-styleable>
</resources>
ptrMode,ptrDrawable,ptrAnimationStyle這三個上面已經介紹過。
ptrRefreshableViewBackground 設置整個mPullRefreshListView的背景色
ptrHeaderBackground 設置下拉Header或者上拉Footer的背景色
ptrHeaderTextColor 用於設置Header與Footer中文本的顏色
ptrHeaderSubTextColor 用於設置Header與Footer中上次刷新時間的顏色
ptrShowIndicator如果爲true會在mPullRefreshListView中出現icon,右上角和右下角,挺有意思的。
ptrHeaderTextAppearance , ptrSubHeaderTextAppearance分別設置拉Header或者上拉Footer中字體的類型顏色等等。
ptrRotateDrawableWhilePulling當動畫設置爲rotate時,下拉是是否旋轉。
看到有這麼多可以設置的屬性,別以爲真的就可以定製了。真正要定製還得到layout中改變刷新佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<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"
ptr:ptrAnimationStyle="rotate"
ptr:ptrHeaderTextColor="#000000"
ptr:ptrHeaderSubTextColor="#00ffff"
ptr:ptrHeaderBackground="@null"
ptr:ptrDrawable="@drawable/android"
ptr:ptrMode="both"
/>
</LinearLayout>