上拉刷新

本文的上拉刷新需要用到 paginglistview 这个框架

public class MainActivity extends AppCompatActivity{

    private PagingListView listView;//listview
    private MyPagingAdaper adapter;//适配器

    //设置的三个集合
    private List<String> firstList;
    private List<String> secondList;
    private List<String> thirdList;

    private int pager = 0;

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

        listView = (PagingListView) findViewById(R.id.paging_list_view);
        adapter = new MyPagingAdaper();

        initData();

        listView.setAdapter(adapter);
        listView.setHasMoreItems(true);//用来判断是否还有更多的选项，确定footView的View是否显示还是progressBar显示出来
        listView.setPagingableListener(new PagingListView.Pagingable() {
            @Override
            public void onLoadMoreItems() {
                if (pager < 3) {
                    new CountryAsyncTask().execute();
                } else {
                    listView.onFinishLoading(false, null);
                }
            }
        });
    }

    private void clearData() {
        pager = 0;
        adapter.removeAllItems();
        listView.setHasMoreItems(true);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.options_menu, menu);
        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.refresh:
                clearData();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    private void initData() {
        firstList = new ArrayList<String>();
        for (int i=0;i<12;i++){
            firstList.add("这是一组第"+i+"个item");
        }


        secondList = new ArrayList<String>();
        for (int i=0;i<5;i++){
            secondList.add("这是二组第"+i+"个item");
        }

        thirdList = new ArrayList<String>();
        for (int i=0;i<5;i++){
            thirdList.add("这是三组第"+i+"个item");
        }

    }

    private class CountryAsyncTask extends SafeAsyncTask<List<String>> {

        @Override
        public List<String> call() throws Exception {
            List<String> result = null;
            switch (pager) {
                case 0:
                    result = firstList;
                    break;
                case 1:
                    result = secondList;
                    break;
                case 2:
                    result = thirdList;
                    break;
            }
            Thread.sleep(3000);
            return result;
        }

        @Override
        protected void onSuccess(List<String> newItems) throws Exception {
            super.onSuccess(newItems);
            pager++;
            listView.onFinishLoading(true, newItems);
        }
    }

}

==================================

package test.huawei.com.mypulltorefresh;

import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.widget.LinearLayout;

/**
 * Created by Administrator on 2016/10/30.
 */
public class LoadMoreView extends LinearLayout {
    public LoadMoreView(Context context) {
        super(context,null);
    }

    public LoadMoreView(Context context, AttributeSet attrs) {
        super(context, attrs,0);
    }

    public LoadMoreView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init();
    }

    private void init() {
        LayoutInflater.from(getContext()).inflate(R.layout.lv_load_more,this);
    }
}

===================================

package test.huawei.com.mypulltorefresh;

import android.media.Image;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.paging.listview.PagingBaseAdapter;


public class  MyPagingAdaper extends PagingBaseAdapter<String> {

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

    @Override
    public String getItem(int position) {
        return items.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder  viewHolder ;
        if (convertView==null){
            viewHolder = new ViewHolder();
            convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.listviewitem, null);
            viewHolder.textView = (TextView)convertView.findViewById(R.id.textview);
            viewHolder.image = (ImageView) convertView.findViewById(R.id.image);
            convertView.setTag(viewHolder);
        }else {
            viewHolder = (ViewHolder) convertView.getTag();
        }

        String text = getItem(position);
        viewHolder.image.setImageResource(R.drawable.ic_action_refresh);
        viewHolder.textView.setText(text);

//
//
//        if (convertView != null) {
//            textView = (TextView) convertView;
//        } else {
//            textView = (TextView) LayoutInflater.from(parent.getContext()).inflate(R.layout.simple_list_item_1, null);
//        }
//        textView.setText(text);
        return convertView;
    }

    public class ViewHolder{
        ImageView  image ;
        TextView textView;
    }
}

=============================

package test.huawei.com.mypulltorefresh;

import android.os.Handler;
import android.os.Looper;
import android.util.Log;

import java.io.InterruptedIOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import java.util.concurrent.FutureTask;


/**
 * A class similar but unrelated to android's {@link android.os.AsyncTask}.
 * <p/>
 * Unlike AsyncTask, this class properly propagates exceptions.
 * <p/>
 * If you're familiar with AsyncTask and are looking for {@link android.os.AsyncTask#doInBackground(Object[])},
 * we've named it {@link #call()} here to conform with java 1.5's {@link Callable} interface.
 * <p/>
 * Current limitations: does not yet handle progress, although it shouldn't be
 * hard to add.
 * <p/>
 * If using your own executor, you must call future() to get a runnable you can execute.
 *
 * @param <ResultT>
 */
public abstract class SafeAsyncTask<ResultT> implements Callable<ResultT> {
    public static final int DEFAULT_POOL_SIZE = 25;
    protected static final Executor DEFAULT_EXECUTOR = Executors.newFixedThreadPool(DEFAULT_POOL_SIZE);

    protected Handler handler;
    protected Executor executor;
    protected StackTraceElement[] launchLocation;
    protected FutureTask<Void> future;


    /**
     * Sets executor to Executors.newFixedThreadPool(DEFAULT_POOL_SIZE) and
     * Handler to new Handler()
     */
    public SafeAsyncTask() {
        this.executor = DEFAULT_EXECUTOR;
    }

    /**
     * Sets executor to Executors.newFixedThreadPool(DEFAULT_POOL_SIZE)
     */
    public SafeAsyncTask(Handler handler) {
        this.handler = handler;
        this.executor = DEFAULT_EXECUTOR;
    }

    /**
     * Sets Handler to new Handler()
     */
    public SafeAsyncTask(Executor executor) {
        this.executor = executor;
    }

    public SafeAsyncTask(Handler handler, Executor executor) {
        this.handler = handler;
        this.executor = executor;
    }


    public FutureTask<Void> future() {
        future = new FutureTask<Void>(newTask());
        return future;
    }

    public SafeAsyncTask<ResultT> executor(Executor executor) {
        this.executor = executor;
        return this;
    }

    public Executor executor() {
        return executor;
    }

    public SafeAsyncTask<ResultT> handler(Handler handler) {
        this.handler = handler;
        return this;
    }

    public Handler handler() {
        return handler;
    }

    public void execute() {
        execute(Thread.currentThread().getStackTrace());
    }

    protected void execute(StackTraceElement[] launchLocation) {
        this.launchLocation = launchLocation;
        executor.execute(future());
    }

    public boolean cancel(boolean mayInterruptIfRunning) {
        if (future == null) throw new UnsupportedOperationException("You cannot cancel this task before calling future()");

        return future.cancel(mayInterruptIfRunning);
    }


    /**
     * @throws Exception, captured on passed to onException() if present.
     */
    protected void onPreExecute() throws Exception {
    }

    /**
     * @param t the result of {@link #call()}
     * @throws Exception, captured on passed to onException() if present.
     */
    @SuppressWarnings({"UnusedDeclaration"})
    protected void onSuccess(ResultT t) throws Exception {
    }

    /**
     * Called when the thread has been interrupted, likely because
     * the task was canceled.
     * <p/>
     * By default, calls {@link #onException(Exception)}, but this method
     * may be overridden to handle interruptions differently than other
     * exceptions.
     *
     * @param e an InterruptedException or InterruptedIOException
     */
    protected void onInterrupted(Exception e) {
        onException(e);
    }

    /**
     * Logs the exception as an Error by default, but this method may
     * be overridden by subclasses.
     *
     * @param e the exception thrown from {@link #onPreExecute()}, {@link #call()}, or {@link #onSuccess(Object)}
     * @throws RuntimeException, ignored
     */
    protected void onException(Exception e) throws RuntimeException {
        onThrowable(e);
    }

    protected void onThrowable(Throwable t) throws RuntimeException {
        Log.e("roboguice", "Throwable caught during background processing", t);
    }

    /**
     * @throws RuntimeException, ignored
     */
    protected void onFinally() throws RuntimeException {
    }


    protected Task<ResultT> newTask() {
        return new Task<ResultT>(this);
    }


    public static class Task<ResultT> implements Callable<Void> {
        protected SafeAsyncTask<ResultT> parent;
        protected Handler handler;

        public Task(SafeAsyncTask<ResultT> parent) {
            this.parent = parent;
            this.handler = parent.handler != null ? parent.handler : new Handler(Looper.getMainLooper());
        }

        public Void call() throws Exception {
            try {
                doPreExecute();
                doSuccess(doCall());

            } catch (final Exception e) {
                try {
                    doException(e);
                } catch (Exception f) {
                    // logged but ignored
                    Log.e("BACKGROUND_TASK", "Exception in", f);
                }

            } catch (final Throwable t) {
                try {
                    doThrowable(t);
                } catch (Exception f) {
                    // logged but ignored
                    Log.e("BACKGROUND_TASK", "Exception in", f);
                }
            } finally {
                doFinally();
            }

            return null;
        }

        protected void doPreExecute() throws Exception {
            postToUiThreadAndWait(new Callable<Object>() {
                public Object call() throws Exception {
                    parent.onPreExecute();
                    return null;
                }
            });
        }

        protected ResultT doCall() throws Exception {
            return parent.call();
        }

        protected void doSuccess(final ResultT r) throws Exception {
            postToUiThreadAndWait(new Callable<Object>() {
                public Object call() throws Exception {
                    parent.onSuccess(r);
                    return null;
                }
            });
        }

        protected void doException(final Exception e) throws Exception {
            if (parent.launchLocation != null) {
                final ArrayList<StackTraceElement> stack = new ArrayList<StackTraceElement>(Arrays.asList(e.getStackTrace()));
                stack.addAll(Arrays.asList(parent.launchLocation));
                e.setStackTrace(stack.toArray(new StackTraceElement[stack.size()]));
            }
            postToUiThreadAndWait(new Callable<Object>() {
                public Object call() throws Exception {
                    if (e instanceof InterruptedException || e instanceof InterruptedIOException) parent.onInterrupted(e);
                    else parent.onException(e);
                    return null;
                }
            });
        }

        protected void doThrowable(final Throwable e) throws Exception {
            if (parent.launchLocation != null) {
                final ArrayList<StackTraceElement> stack = new ArrayList<StackTraceElement>(Arrays.asList(e.getStackTrace()));
                stack.addAll(Arrays.asList(parent.launchLocation));
                e.setStackTrace(stack.toArray(new StackTraceElement[stack.size()]));
            }
            postToUiThreadAndWait(new Callable<Object>() {
                public Object call() throws Exception {
                    parent.onThrowable(e);
                    return null;
                }
            });
        }

        protected void doFinally() throws Exception {
            postToUiThreadAndWait(new Callable<Object>() {
                public Object call() throws Exception {
                    parent.onFinally();
                    return null;
                }
            });
        }


        /**
         * Posts the specified runnable to the UI thread using a handler,
         * and waits for operation to finish.  If there's an exception,
         * it captures it and rethrows it.
         *
         * @param c the callable to post
         * @throws Exception on error
         */
        protected void postToUiThreadAndWait(final Callable c) throws Exception {
            final CountDownLatch latch = new CountDownLatch(1);
            final Exception[] exceptions = new Exception[1];

            // Execute onSuccess in the UI thread, but wait
            // for it to complete.
            // If it throws an exception, capture that exception
            // and rethrow it later.
            handler.post(new Runnable() {
                public void run() {
                    try {
                        c.call();
                    } catch (Exception e) {
                        exceptions[0] = e;
                    } finally {
                        latch.countDown();
                    }
                }
            });

            // Wait for onSuccess to finish
            latch.await();

            if (exceptions[0] != null) throw exceptions[0];

        }

    }

}