PullToRefreshGridView上拉加载、下拉刷新
eclipse中的项目：
//注意：此刷新功能是使用的第三方的PullToRefreshScrollView，因此需要导入第三方library作为依赖
步骤：导入第三方library，依赖：点击你的应用程序右击，再点击properties，再点击Android，再点击add，选中library，点击OK
//请求网路需要配置完网络权限 <uses-permission android:name="android.permission.INTERNET"/>
Android Studio中的项目：导入library，并依赖
导入：点击File，New——>import Module 打开libray的位置，选中libray ,点击OK
依赖：点击Android studio工具栏中的有多个小方块的那个，再点击 app，再点击Dependencies,再点击+符号，再点击Module dependency，选中libray，点击OK，依赖成功
//-------------------一下是主布局文件-------------------------------
//注意：当自己定义属性是高度要填充父窗体，如果是包裹内容，会不显示数据
<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"
>
<com.handmark.pulltorefresh.library.PullToRefreshGridView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/gv_gridview"
android:numColumns="2"></com.handmark.pulltorefresh.library.PullToRefreshGridView>
<!-- <com.handmark.pulltorefresh.library.PullToRefreshGridView
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:id="@+id/gv_gridview"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:numColumns="2"
android:verticalSpacing="1dp"
android:horizontalSpacing="1dp"
android:columnWidth="100dp"
android:stretchMode="columnWidth"
android:gravity="fill"
ptr:ptrMode="both"
ptr:ptrDrawable="@drawable/default_ptr_rotate" /> -->
</RelativeLayout>
//---------------一下是gridview的条目的布局文件 叫：fenlei_item_gridview----------------------
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:scaleType="fitXY"
android:src="@drawable/ic_launcher"
android:id="@+id/iv_fenlei_grid_goods_img"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_fenlei_grid_goods_name"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/tv_fenlei_grid_shop_price"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:id="@+id/tv_fenlei_grid_market_price"/>
</LinearLayout>
</LinearLayout>
//-------------------一下是bean包中的FenLeiGoods类，封装类商品的属性---------------------------
package com.bwie.test;
public class FenLeiGoods {
private String id;
private String goods_name;
private String shop_price;
private String market_price;
private String goods_img;
private String reservable;
private String efficacy;
private String watermarkUrl;
public FenLeiGoods(String id, String goods_name, String shop_price, String market_price, String goods_img, String reservable, String efficacy, String watermarkUrl) {
this.id = id;
this.goods_name = goods_name;
this.shop_price = shop_price;
this.market_price = market_price;
this.goods_img = goods_img;
this.reservable = reservable;
this.efficacy = efficacy;
this.watermarkUrl = watermarkUrl;
}
public FenLeiGoods() {
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getGoods_name() {
return goods_name;
}
public void setGoods_name(String goods_name) {
this.goods_name = goods_name;
}
public String getShop_price() {
return shop_price;
}
public void setShop_price(String shop_price) {
this.shop_price = shop_price;
}
public String getMarket_price() {
return market_price;
}
public void setMarket_price(String market_price) {
this.market_price = market_price;
}
public String getGoods_img() {
return goods_img;
}
public void setGoods_img(String goods_img) {
this.goods_img = goods_img;
}
public String getReservable() {
return reservable;
}
public void setReservable(String reservable) {
this.reservable = reservable;
}
public String getEfficacy() {
return efficacy;
}
public void setEfficacy(String efficacy) {
this.efficacy = efficacy;
}
public String getWatermarkUrl() {
return watermarkUrl;
}
public void setWatermarkUrl(String watermarkUrl) {
this.watermarkUrl = watermarkUrl;
}
@Override
public String toString() {
return "FenLeiGoods{" +
"id='" + id + '\'' +
", goods_name='" + goods_name + '\'' +
", shop_price='" + shop_price + '\'' +
", market_price='" + market_price + '\'' +
", goods_img='" + goods_img + '\'' +
", reservable='" + reservable + '\'' +
", efficacy='" + efficacy + '\'' +
", watermarkUrl='" + watermarkUrl + '\'' +
'}';
}
}
//-------------------------以下是自定义的适配器类---------------------------------
package com.bwie.test;
import java.util.List;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class MyFenLeiAdapter extends BaseAdapter{
private List<FenLeiGoods> fenLeiGoodses;
private Context context;
public MyFenLeiAdapter(List<FenLeiGoods> fenLeiGoodses, Context context) {
this.fenLeiGoodses = fenLeiGoodses;
this.context = context;
}
@Override
public int getCount() {
return fenLeiGoodses.size();
}
@Override
public Object getItem(int position) {
return fenLeiGoodses.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder=null;
FenLeiGoods fenLeiGoodss=fenLeiGoodses.get(position);
if (convertView==null){
convertView=View.inflate(context, R.layout.fenlei_item_gridview,null);
holder=new ViewHolder();
holder.goods_img= (ImageView) convertView.findViewById(R.id.iv_fenlei_grid_goods_img);
holder.goods_name= (TextView) convertView.findViewById(R.id.tv_fenlei_grid_goods_name);
holder.shop_price= (TextView) convertView.findViewById(R.id.tv_fenlei_grid_shop_price);
holder.market_price= (TextView) convertView.findViewById(R.id.tv_fenlei_grid_market_price);
convertView.setTag(holder);
}
holder= (ViewHolder) convertView.getTag();
holder.goods_name.setText(fenLeiGoodss.getGoods_name());
holder.shop_price.setText(fenLeiGoodss.getShop_price());
holder.market_price.setText(fenLeiGoodss.getMarket_price());
ImageLoader.getInstance().init(ImageLoaderConfiguration.createDefault(context));
DisplayImageOptions options=new DisplayImageOptions.Builder().cacheOnDisk(true).cacheInMemory(true).build();
ImageLoader.getInstance().displayImage(fenLeiGoodss.getGoods_img(),holder.goods_img,options);
return convertView;
}
static class ViewHolder{
public TextView goods_name;
public TextView shop_price;
public TextView market_price;
public ImageView goods_img;
}
}
//----------=============以下是MainActivity中======================
package com.bwie.test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshGridView;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.widget.GridView;
import android.widget.Toast;
public class MainActivity extends Activity {
//数据网址
private String urlPath="http://m.yunifang.com/yunifang/mobile/category/list?random=12024&encode=815abd1d3bb7ad28ade130e19dad79dc";
//定义集合
private List<FenLeiGoods> fenLeiGoodses=new ArrayList<FenLeiGoods>();
//定义适配器
private MyFenLeiAdapter adapter;
//PullToRefreshGridView
private PullToRefreshGridView gv_gridview;
//---------------------------------------------
//使用Handler更新UI
private Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what){
case 0:
//获得数据
String text= (String) msg.obj;
//解析数据json串
tojson(text);
break;
}
}
};
//-------------------------------------------------------
//解析数据json串
private void tojson(String text) {
try {
JSONObject obj=new JSONObject(text);
JSONObject data=obj.getJSONObject("data");
JSONArray goodsBrief=data.getJSONArray("goodsBrief");
for (int i=0;i<goodsBrief.length();i++){
JSONObject json=goodsBrief.getJSONObject(i);
String id=json.getString("id");
String goods_name=json.getString("goods_name");
String shop_price=json.getString("shop_price");
String market_price=json.getString("market_price");
String goods_img=json.getString("goods_img");
String reservable=json.getString("reservable");
String efficacy=json.getString("efficacy");
//添加到集合
FenLeiGoods fenleigoodss=new FenLeiGoods(id,goods_name,shop_price,market_price,goods_img,reservable,efficacy,null);
fenLeiGoodses.add(fenleigoodss);
Log.i("kkkkkkkkkkkkkkkkk",fenLeiGoodses.toString());
//设置适配器
if (adapter==null) {
adapter = new MyFenLeiAdapter(fenLeiGoodses, this);
gv_gridview.setAdapter(adapter);
}else{
adapter.notifyDataSetChanged();
}
}
} catch (JSONException e) {
e.printStackTrace();
}
}
//-------------------onCreate中---------------------
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//找到控件
gv_gridview = (PullToRefreshGridView) findViewById(R.id.gv_gridview);
//获得网络数据
huodeshuju();
//设置gridview的模式
gv_gridview.setMode(Mode.BOTH);
//设置刷新监听
gv_gridview.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2() {
@Override//下拉刷新
public void onPullDownToRefresh(PullToRefreshBase refreshView) {
Toast.makeText(MainActivity.this, "下拉刷新", 0).show();
//重新获得数据
huodeshuju();
//刷新适配器
adapter.notifyDataSetChanged();
//调用完成刷新的方法
new FinishRefresh().execute();
}
@Override//上拉加载
public void onPullUpToRefresh(PullToRefreshBase refreshView) {
Toast.makeText(MainActivity.this, "上拉加载", 0).show();
//重新获得数据
huodeshuju();
//刷新适配器
adapter.notifyDataSetChanged();
//调用完成刷新的方法
new FinishRefresh().execute();
}
});
}
//-----------------------------------
//完成刷新的方法
private class FinishRefresh extends AsyncTask<Void, Void, Void> {
@Override
protected Void doInBackground(Void... params) {
try {
//停留2秒
Thread.sleep(2000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Void result){
//刷新完成
gv_gridview.onRefreshComplete();
}
}
//---------------------------------------
private void huodeshuju() {
new Thread(){
@Override
public void run() {
try {
URL url=new URL(urlPath);
HttpURLConnection urlconnection= (HttpURLConnection) url.openConnection();
urlconnection.setConnectTimeout(5000);
urlconnection.setReadTimeout(5000);
urlconnection.setRequestMethod("GET");
//urlconnection.connect();
int code=urlconnection.getResponseCode();
if (code==200){
InputStream inputstream=urlconnection.getInputStream();
BufferedReader reader=new BufferedReader(new InputStreamReader(inputstream));
String line;
StringBuffer buffer=new StringBuffer();
while ((line=reader.readLine())!=null){
buffer.append(line);
}
String str=buffer.toString();
Message message=new Message();
message.what=0;
message.obj=str;
handler.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
}
//----------=============以上是MainActivity中======================
