PullToRefresh（刷新加载）

/////////////////////////////////////////////  MainActivity    ///////////////////////////////////////////////////////

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.text.format.DateUtils;

import android.widget.ArrayAdapter;

import android.widget.GridView;

import com.handmark.pulltorefresh.library.PullToRefreshBase;

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

import com.handmark.pulltorefresh.library.PullToRefreshGridView;

public class MainActivity extends Activity {
private Context context;
private PullToRefreshGridView gridView;
private List<String> list;
private ArrayAdapter<String> adapter;

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

init();
}

private void init() {
gridView = (PullToRefreshGridView) findViewById(R.id.myGridView);

list = setData("商品--");

adapter = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1,list);

gridView.setAdapter(adapter);

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

@Override
public void onPullDownToRefresh(PullToRefreshBase<GridView> refreshView) {
// label 标签，标记
String label = DateUtils.formatDateTime(getApplicationContext(), System.currentTimeMillis(),  
                       DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE | DateUtils.FORMAT_ABBREV_ALL);
refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);  

List<String> list2 = setData("刷新--");
list.addAll(0,list2);
ArrayAdapter<String> A = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1,list);
gridView.setAdapter(A);
gridView.onRefreshComplete();
}

@Override
public void onPullUpToRefresh(PullToRefreshBase<GridView> refreshView) {
List<String> list3 = setData("加载--");
list.addAll(list3);
ArrayAdapter<String> A = new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1,list);
gridView.setAdapter(A);
gridView.onRefreshComplete();
}
});

}

private List<String> setData(String str) {
List<String> list = new ArrayList<String>();
for(int i=0;i<30;i++){
list.add(str+i);
}
return list;
}
}

/////////////////////////////////////////////  main_ctivity    ///////////////////////////////////////////////////////

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity" >

    <com.handmark.pulltorefresh.library.PullToRefreshGridView

        xmlns:ptr="http://schemas.android.com/apk/res-auto"

        android:id="@+id/myGridView"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:numColumns="3"

        ptr:ptrDrawable="@drawable/ic_launcher"  

        ptr:ptrMode="both"

          />

     

</RelativeLayout>