Pullto...

package com.example.pullto;

import java.util.Arrays;
import java.util.LinkedList;

import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshGridView;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {
    static final int MENU_SET_MODE = 0;

    private LinkedList<String> mListItems;
    private PullToRefreshGridView mPullRefreshGridView;
    private GridView mGridView;
    private ArrayAdapter<String> mAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mPullRefreshGridView = (PullToRefreshGridView) findViewById(R.id.pull_refresh_grid);
        mGridView = mPullRefreshGridView.getRefreshableView();

        mPullRefreshGridView.setOnRefreshListener(new OnRefreshListener2<GridView>() {

            @Override
            public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
                Toast.makeText(MainActivity.this, "下拉加载!", Toast.LENGTH_SHORT).show();
                new GetDataTask().execute();
            }

            @Override
            public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
                Toast.makeText(MainActivity.this, "上拉刷新!", Toast.LENGTH_SHORT).show();
                new GetDataTask().execute();
            }

        });

        mListItems = new LinkedList<String>();

        TextView tv = new TextView(this);
        tv.setGravity(Gravity.CENTER);
        tv.setText("Empty View, Pull Down/Up to Add Items");
        mPullRefreshGridView.setEmptyView(tv);

        mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mListItems);
        mGridView.setAdapter(mAdapter);
    }

    private class GetDataTask extends AsyncTask<Void, Void, String[]> {

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

        @Override
        protected void onPostExecute(String[] result) {
            mListItems.addFirst("Added after refresh...");
            mListItems.addAll(Arrays.asList(result));
            mAdapter.notifyDataSetChanged();

            // Call onRefreshComplete when the list has been refreshed.
            mPullRefreshGridView.onRefreshComplete();

            super.onPostExecute(result);
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, MENU_SET_MODE, 0,
                mPullRefreshGridView.getMode() == Mode.BOTH ? "Change to MODE_PULL_DOWN"
                        : "Change to MODE_PULL_BOTH");
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        MenuItem setModeItem = menu.findItem(MENU_SET_MODE);
        setModeItem.setTitle(mPullRefreshGridView.getMode() == Mode.BOTH ? "Change to MODE_PULL_FROM_START"
                : "Change to MODE_PULL_BOTH");

        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case MENU_SET_MODE:
                mPullRefreshGridView
                        .setMode(mPullRefreshGridView.getMode() == Mode.BOTH ? Mode.PULL_FROM_START
                                : Mode.BOTH);
                break;
        }

        return super.onOptionsItemSelected(item);
    }

    private String[] mStrings = { "我爱我家" };
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

<!-- The PullToRefreshGridView replaces a standard GridView widget. -->
    <com.handmark.pulltorefresh.library.PullToRefreshGridView
        xmlns:ptr="http://schemas.android.com/apk/res-auto"
        android:id="@+id/pull_refresh_grid"
        android:layout_height="fill_parent"
        android:layout_width="fill_parent"
        android:numColumns="auto_fit"
        android:verticalSpacing="1dp"
        android:horizontalSpacing="1dp"
        android:columnWidth="100dp"
        android:stretchMode="columnWidth"
        android:gravity="fill"
        ptr:ptrMode="both"
        ptr:ptrDrawable="@drawable/android" />

</LinearLayout>