Android PullToRefreshListView和ViewPager的结合使用

其实这个不是什么新东西了，在介绍（一）中我们就知道了PullToRefreshListView的用法，这里只要将其放入到ViewPager中就行啦。ViewPager还是和以往一样的定义和使用，在适配器中存视图的时候放入PullToRefreshListView就行。

1.ViewPager的布局文件

activity_main.xml

<?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"
android:background="#000000">

<!-- The PullToRefreshListView replaces a standard ListView widget. -->

<android.support.v4.view.ViewPager
android:id="@+id/vp_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />

</LinearLayout>

2.找到ViewPager并设置适配器

private void initViewPager() {
// TODO 自动生成的方法存根
mViewPager = (ViewPager) findViewById(R.id.vp_list);
//得到设置好的view列表
ArrayList<View> viewList = setListViewInVp();
mViewPager.setAdapter(new ListViewPagerAdapter(viewList));
}

适配器：

/**
* @author:Jack Tony
* @tips  :viewPager的适配器
* @date  :2014-10-14
*/
public class ListViewPagerAdapter extends PagerAdapter {
//设置list数组，传入view
private ArrayList<View> mViewList;
private int pagerNum = 0;

public ListViewPagerAdapter(ArrayList<View> viewList) {
mViewList = viewList;
}

public int getPagerNum() {
return pagerNum;
}

@Override
public int getCount() {
return mViewList.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}

@Override
public void destroyItem(View arg0, int position, Object object) {
if (mViewList.get(position) != null) {
((ViewPager) arg0).removeView(mViewList.get(position));
}
}

@Override
public Object instantiateItem(View container, int position) {
try {
if (mViewList.get(position).getParent() == null) {
((ViewPager) container).addView(mViewList.get(position), 0);
} else {
/*
* 很难理解新添加进来的view会自动绑定一个父类，由于一个儿子view不能与两个父类相关，
* 所以得解绑不这样做否则会产生 viewpager java.lang.IllegalStateException:
* The specified child already has a parent. You must call
* removeView() on the child's parent first.
*/
((ViewGroup) mViewList.get(position).getParent())
.removeView(mViewList.get(position));
((ViewPager) container).addView(mViewList.get(position), 0);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
pagerNum = position;
}
return mViewList.get(position);
}

}

3.开始设置要放入viewPager中的listView

布局文件：

layout_listview_in_viewpager.xml

<?xml version="1.0" encoding="utf-8"?>
<com.handmark.pulltorefresh.library.PullToRefreshListView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
ptr:ptrHeaderBackground="@android:color/darker_gray" />

java代码：

private ArrayList<View> setListViewInVp() {
//设置给viewpager中填充的view列表
ArrayList<View> viewList = new ArrayList<View>();
//将string数组放入适配器中
final String[] data = { "1", "2", "3","4", "5", "6", "7", "8", "9", "10", "11",
"12", "13", "14", "15", "16", "17","18", "19", "20",  };
ListAdapter adapter = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, data);

//找到listView的布局，生成可以下拉刷新的listView，添加到视图列表中
LayoutInflater inflater = LayoutInflater.from(getApplication());
for (int i = 0; i < 4; i++) {
PullToRefreshListView plv = (PullToRefreshListView) inflater.inflate(
R.layout.layout_listview_in_viewpager,  null);
plv.setAdapter(adapter);
plv.setOnRefreshListener(new OnRefreshListener<ListView>() {

@Override
public void onRefresh(PullToRefreshBase<ListView> refreshView) {
// TODO 自动生成的方法存根
new GetDataTask(refreshView).execute();
}
});

viewList.add(plv);
}
return viewList;
}

4.定义异步任务

private static class GetDataTask extends AsyncTask<Void, Void, Void> {

PullToRefreshBase<?> mRefreshedView;

public GetDataTask(PullToRefreshBase<?> refreshedView) {
mRefreshedView = refreshedView;
}

@Override
protected Void doInBackground(Void... params) {
// Simulates a background job.
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
}
return null;
}

@Override
protected void onPostExecute(Void result) {
mRefreshedView.onRefreshComplete();
super.onPostExecute(result);
}
}

MainActivity.java的全部代码

package com.example.ptrlistviewinviewpagertest;

import java.util.ArrayList;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

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

public class MainActivity extends Activity {

private ViewPager mViewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

initView();
}

private void initView() {
// TODO 自动生成的方法存根
initViewPager();
}

private void initViewPager() {
// TODO 自动生成的方法存根
mViewPager = (ViewPager) findViewById(R.id.vp_list);
//得到设置好的view列表
ArrayList<View> viewList = setListViewInVp();
mViewPager.setAdapter(new ListViewPagerAdapter(viewList));
}

private ArrayList<View> setListViewInVp() {
//设置给viewpager中填充的view列表
ArrayList<View> viewList = new ArrayList<View>();
//将string数组放入适配器中
final String[] data = { "1", "2", "3","4", "5", "6", "7", "8", "9", "10", "11",
"12", "13", "14", "15", "16", "17","18", "19", "20",  };
ListAdapter adapter = new ArrayAdapter<String>(getApplicationContext(),
android.R.layout.simple_list_item_1, data);

//找到listView的布局，生成可以下拉刷新的listView，添加到视图列表中
LayoutInflater inflater = LayoutInflater.from(getApplication());
for (int i = 0; i < 4; i++) {
PullToRefreshListView plv = (PullToRefreshListView) inflater.inflate(
R.layout.layout_listview_in_viewpager,  null);
plv.setAdapter(adapter);
plv.setOnRefreshListener(new OnRefreshListener<ListView>() {

@Override
public void onRefresh(PullToRefreshBase<ListView> refreshView) {
// TODO 自动生成的方法存根
new GetDataTask(refreshView).execute();
}
});

viewList.add(plv);
}
return viewList;
}

/**
* @author:Jack Tony
* @tips  :viewPager的适配器
* @date  :2014-10-14
*/
public class ListViewPagerAdapter extends PagerAdapter {
//设置list数组，传入view
private ArrayList<View> mViewList;
private int pagerNum = 0;

public ListViewPagerAdapter(ArrayList<View> viewList) {
mViewList = viewList;
}

public int getPagerNum() {
return pagerNum;
}

@Override
public int getCount() {
return mViewList.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}

@Override
public void destroyItem(View arg0, int position, Object object) {
if (mViewList.get(position) != null) {
((ViewPager) arg0).removeView(mViewList.get(position));
}
}

@Override
public Object instantiateItem(View container, int position) {
try {
if (mViewList.get(position).getParent() == null) {
((ViewPager) container).addView(mViewList.get(position), 0);
} else {
/*
* 很难理解新添加进来的view会自动绑定一个父类，由于一个儿子view不能与两个父类相关，
* 所以得解绑不这样做否则会产生 viewpager java.lang.IllegalStateException:
* The specified child already has a parent. You must call
* removeView() on the child's parent first.
*/
((ViewGroup) mViewList.get(position).getParent())
.removeView(mViewList.get(position));
((ViewPager) container).addView(mViewList.get(position), 0);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
pagerNum = position;
}
return mViewList.get(position);
}

}

private static class GetDataTask extends AsyncTask<Void, Void, Void> {

PullToRefreshBase<?> mRefreshedView;

public GetDataTask(PullToRefreshBase<?> refreshedView) {
mRefreshedView = refreshedView;
}

@Override
protected Void doInBackground(Void... params) {
// Simulates a background job.
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
}
return null;
}

@Override
protected void onPostExecute(Void result) {
mRefreshedView.onRefreshComplete();
super.onPostExecute(result);
}
}
}

源码下载：http://download.csdn.net/detail/shark0017/8036901