Android 页面片段中的PullToRefresh列表

我想用寻呼机创建PullToRefresh列表片段。 我用的是ActionBarSherlock，和列表中的。没有碎片我没有问题，但我需要支持双窗格布局

布局文件

activity
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".SubcatNavActivity" />

</LinearLayout>

fragment
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ListView
        android:id="@+id/subcat_list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >
    </ListView>
</LinearLayout>

我创建了pager类，以便以后在双窗格模式的主活动中也使用它

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.ViewPager;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.Tab;
import com.actionbarsherlock.app.SherlockFragmentActivity;


public class SubcatNavPager implements ActionBar.TabListener
{   
    public SectionsPagerAdapter mSectionsPagerAdapter;
    public ViewPager mViewPager;
    private SherlockFragmentActivity mFragmentActivity;

    public SubcatNavPager(SherlockFragmentActivity fa) {
        mFragmentActivity = fa;
    }

    public void initialisePaging() {
        mFragmentActivity.setTitle(mFragmentActivity.getResources().getString(SiteContent.curr_cat.nameID));

        try {
            List<Fragment> fragments = new Vector<Fragment>();
            mSectionsPagerAdapter = new SectionsPagerAdapter(mFragmentActivity.getSupportFragmentManager(), fragments);

            for (int i = 0; i < SiteContent.curr_cat.content.size(); ++i) {
                Fragment tmp = SiteContent.curr_cat.fragment.newInstance();

                if (!(tmp instanceof ContentDownloader)) {
                    throw new IllegalStateException(
                            "Fragment must implement content downloader interface.");
                }

                Bundle args = new Bundle();
                args.putInt(SubcatListFragment.SUBCAT_IDX, i);
                tmp.setArguments(args);
                fragments.add((Fragment)tmp);
            }

            mViewPager = (ViewPager)mFragmentActivity.findViewById(R.id.pager);
            mViewPager.setAdapter(mSectionsPagerAdapter);

            final ActionBar actionBar = mFragmentActivity.getSupportActionBar();
            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

            mViewPager
                    .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                        @Override
                        public void onPageSelected(int position) {
                            actionBar.setSelectedNavigationItem(position);
                        }
                    });

            for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
                actionBar.addTab(actionBar.newTab()
                        .setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this));
            }

            actionBar.setDisplayHomeAsUpEnabled(true);
        }
        catch (Exception e) {}
    }

    @Override   
    public void onTabSelected(Tab tab, FragmentTransaction fragmentTransaction) {
        int pos = tab.getPosition();
        SiteContent.setCurrSubCat(pos);
        mViewPager.setCurrentItem(pos);
        ((ContentDownloader)mSectionsPagerAdapter.getItem(pos)).downloadContent(false);
    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {}

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {}


    public class SectionsPagerAdapter extends FragmentPagerAdapter
    {
        private List<Fragment> fragments;

        public SectionsPagerAdapter(FragmentManager fm, List<Fragment> fList) {
            super(fm);
            fragments = fList;
        }

        @Override
        public Fragment getItem(int position) {
            Fragment tmp = fragments.get(position);
            return tmp;
        }

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

        @Override
        public CharSequence getPageTitle(int position) {
            return mFragmentActivity.getResources().getString(SiteContent.curr_cat.content.get(position).nameID);
        }
    }
}

导入android.os.Bundle；
导入android.support.v4.app.Fragment；
导入android.support.v4.app.FragmentManager；
导入android.support.v4.app.FragmentPagerAdapter；
导入android.support.v4.app.FragmentTransaction；
导入android.support.v4.view.ViewPager；
导入com.actionbarsherlock.app.ActionBar；
导入com.actionbarsherlock.app.ActionBar.Tab；
导入com.actionbarsherlock.app.SherlockFragmentActivity；
公共类SubcatNavPager实现ActionBar.TabListener
{   
公共部分SPAGERAAdapter MSECTIONSPAGERAAdapter；
公共视图寻呼机mViewPager；
私人夏洛克支离破碎活动；
公用子呼叫器（SherlockFragmentFa）{
mFragmentActivity=fa；
}
public void initialisePaging（）{
setTitle（mffragmentActivity.getResources（）.getString（SiteContent.curr_cat.nameID））；
试一试{
列表片段=新向量（）；
mSectionsPagerAdapter=新的SectionsPagerAdapter（MFFragmentActivity.getSupportFragmentManager（），fragments）；
对于（int i=0；i

最后，片段本身

import com.actionbarsherlock.app.SherlockListFragment;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

public class SubcatListFragment extends SherlockListFragment implements ContentDownloader
{
    public static final String SUBCAT_IDX = "subcat_idx";
    protected ArrayAdapter<SiteItem> adapter;
    protected DownloadSubcatTask loadTask;
    protected SiteSubcat subcat;
    private PullToRefreshListView mPullToRefreshListView;
    private boolean loadRequested;

    public SubcatListFragment() {           
        adapter = null;
        loadRequested = false;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Bundle args = getArguments();           
        subcat = SiteContent.curr_cat.content.get(args.getInt(SUBCAT_IDX));
        adapter = new ArrayAdapter<SiteItem>(getActivity(), android.R.layout.simple_list_item_1, subcat.items);
        this.setListAdapter(adapter);

        if (loadRequested == true)
            downloadContent(false);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View layout = inflater.inflate(R.layout.fragment_subcat_nav, container, false);

        ListView lv = (ListView) layout.findViewById(R.id.subcat_list);
        ViewGroup parent = (ViewGroup) lv.getParent();

        int lvIndex = parent.indexOfChild(lv);
        parent.removeViewAt(lvIndex);
        mPullToRefreshListView = new PullToRefreshListView(layout.getContext());
        mPullToRefreshListView.setMode(Mode.BOTH);
        mPullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>()
                                {
                                    @Override
                                    public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                                        downloadContent(true);
                                    }
                                });

        parent.addView(mPullToRefreshListView, lvIndex, lv.getLayoutParams());        
        return layout;
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        Intent subcatIntent = new Intent(getActivity(), NewsActivity.class);
        SiteContent.setCurrItem((int)id);
        startActivity(subcatIntent);
    }

    @Override
    public void downloadContent(boolean bRefresh) {
        // on first call to onTabSelected this fragment is not created, yet
        if (subcat == null)
            loadRequested = true;
        else
        {
            loadRequested = false;
            if (loadTask == null && (adapter.isEmpty() == true || bRefresh == true))
                (loadTask = new DownloadSubcatTask()).execute(subcat.getUrl());
        }
    }   

    protected void showProgress(boolean bShow) {
        getActivity().setProgressBarIndeterminateVisibility(bShow);
    }

    private class DownloadSubcatTask extends DownloadTask {
        public DownloadSubcatTask() {}      

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            showProgress(true);
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            adapter.clear();
            loadTask = null;

            try {
                SiteContent.curr_cat.parser.newInstance().parse(result, adapter);
            }
            catch (Exception e) {}

            mPullToRefreshListView.onRefreshComplete();
            adapter.notifyDataSetChanged();
            showProgress(false);
        }
    }
}

import com.actionbarsherlock.app.SherlockListFragment；
导入com.mandrk.pulltorefresh.library.pulltorefresh库；
导入com.mandrk.pulltorefresh.library.PullToRefreshBase.Mode；
导入com.mandrk.pulltorefresh.library.pulltorefresh列表视图；
公共类SubcatListFragment扩展SherlockListFragment实现ContentDownloader
{
公共静态最终字符串SUBCAT\u IDX=“SUBCAT\u IDX”；
受保护的阵列适配器；
受保护的下载子任务加载任务；
受保护站点子目录子目录；
私有PullToRefreshListView mPullToRefreshListView；
请求私有布尔值；
公共子目录片段（）{
适配器=空；
loadrequest=false；
}
@凌驾
创建时的公共void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
Bundle args=getArguments（）；
subcat=SiteContent.curr_cat.content.get（args.getInt（subcat_IDX））；
adapter=newarrayadapter（getActivity（），android.R.layout.simple\u list\u item\u 1，subcat.items）；
这个.setListAdapter（适配器）；
如果（loadRequested==true）
下载内容（假）；
}
@凌驾
CreateView上的公共视图（布局、充气机、视图组容器、捆绑包保存状态）{
视图布局=充气机。充气（R.layout.fragment\u subcat\u nav，container，false）；
ListView lv=（ListView）layout.findViewById（R.id.subcat\u列表）；
ViewGroup parent=（ViewGroup）lv.getParent（）；
int lvIndex=parent.indexOfChild（lv）；
parent.removeViewAt（lvIndex）；
mPullToRefreshListView=new PullToRefreshListView（layout.getContext（））；
mPullToRefreshListView.setMode（Mode.BOTH）；
mPullToRefreshListView.setOnRefreshListener（新的PullToRefreshBase.OnRefreshListener（）
{
@O
import com.actionbarsherlock.app.SherlockListFragment;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshListView;

public class SubcatListFragment extends SherlockListFragment implements ContentDownloader
{
    public static final String SUBCAT_IDX = "subcat_idx";
    protected ArrayAdapter<SiteItem> adapter;
    protected DownloadSubcatTask loadTask;
    protected SiteSubcat subcat;
    private PullToRefreshListView mPullToRefreshListView;
    private boolean loadRequested;

    public SubcatListFragment() {           
        adapter = null;
        loadRequested = false;
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Bundle args = getArguments();           
        subcat = SiteContent.curr_cat.content.get(args.getInt(SUBCAT_IDX));
        adapter = new ArrayAdapter<SiteItem>(getActivity(), android.R.layout.simple_list_item_1, subcat.items);
        this.setListAdapter(adapter);

        if (loadRequested == true)
            downloadContent(false);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View layout = inflater.inflate(R.layout.fragment_subcat_nav, container, false);

        ListView lv = (ListView) layout.findViewById(R.id.subcat_list);
        ViewGroup parent = (ViewGroup) lv.getParent();

        int lvIndex = parent.indexOfChild(lv);
        parent.removeViewAt(lvIndex);
        mPullToRefreshListView = new PullToRefreshListView(layout.getContext());
        mPullToRefreshListView.setMode(Mode.BOTH);
        mPullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>()
                                {
                                    @Override
                                    public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                                        downloadContent(true);
                                    }
                                });

        parent.addView(mPullToRefreshListView, lvIndex, lv.getLayoutParams());        
        return layout;
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        Intent subcatIntent = new Intent(getActivity(), NewsActivity.class);
        SiteContent.setCurrItem((int)id);
        startActivity(subcatIntent);
    }

    @Override
    public void downloadContent(boolean bRefresh) {
        // on first call to onTabSelected this fragment is not created, yet
        if (subcat == null)
            loadRequested = true;
        else
        {
            loadRequested = false;
            if (loadTask == null && (adapter.isEmpty() == true || bRefresh == true))
                (loadTask = new DownloadSubcatTask()).execute(subcat.getUrl());
        }
    }   

    protected void showProgress(boolean bShow) {
        getActivity().setProgressBarIndeterminateVisibility(bShow);
    }

    private class DownloadSubcatTask extends DownloadTask {
        public DownloadSubcatTask() {}      

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            showProgress(true);
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            adapter.clear();
            loadTask = null;

            try {
                SiteContent.curr_cat.parser.newInstance().parse(result, adapter);
            }
            catch (Exception e) {}

            mPullToRefreshListView.onRefreshComplete();
            adapter.notifyDataSetChanged();
            showProgress(false);
        }
    }
}

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View layout = inflater.inflate(R.layout.fragment_subcat_nav, container, false);
        ListView lv = (ListView) layout.findViewById(android.R.id.list);

        mPullToRefreshListView = new PullToRefreshListView(getActivity());
        mPullToRefreshListView.setLayoutParams(lv.getLayoutParams());

        mPullToRefreshListView.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener<ListView>()
                                {
                                    @Override
                                    public void onRefresh(PullToRefreshBase<ListView> refreshView) {
                                        downloadContent(true);
                                    }
                                });

        return mPullToRefreshListView;
    }