Android ListView下拉加载更多，http请求加载数据，Item点击事件

1.这个demo的数据来源于公司数据库，HTTP请求获取数据的线程请不要全部照抄，建议自己伪造list数据，否则无法显示列表!

2.显示更多既可以点击，也可以拖拽。

3.ListView  item有绑定有事件,可以点击!

直接上代码:

以下是最主要的Activity：

package com.example.helloworld;import java.io.IOException;import java.util.ArrayList;import java.util.List;import org.apache.http.HttpResponse;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpPost;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.util.EntityUtils;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import com.example.adapter.ListItemAdapter;import com.example.domain.GoodsRes;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.os.Message;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.ListView;public class GoodsListActivity extends Activity implements OnScrollListener{//private List<GoodsRes> list = new ArrayList<GoodsRes>();private List<GoodsRes> glist;ListView grLv ;private Button searchMoreBtn;private LinearLayout loadView;private int currentPageCount = 1;private int lastItem;private Handler myHandler = new Handler(){public void handleMessage(android.os.Message msg) {if(msg.what == 1){try {Thread.sleep(3000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}searchMoreBtn.setVisibility(View.VISIBLE);loadView.setVisibility(View.GONE);ListItemAdapter adapter = new ListItemAdapter(glist,GoodsListActivity.this);grLv.setAdapter(adapter);}};};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.goods_list);grLv = (ListView) findViewById(R.id.goods_listView);//searchMoreBtn = (Button) findViewById(R.id.search_more);addPageMore();MyThread thread = new MyThread(1, 20);thread.start();//list = thread.getGlist();grLv.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View v, int index,long id) {GoodsRes gr = glist.get(index);Intent intent = new Intent(GoodsListActivity.this, GoodsDetailActivity.class);Bundle data = new Bundle();intent.putExtra("gr", gr);startActivity(intent);}});grLv.setOnScrollListener(this);}public void addPageMore(){View view = LayoutInflater.from(this).inflate(R.layout.list_page_load, null);searchMoreBtn = (Button) view.findViewById(R.id.search_more);loadView = (LinearLayout) view.findViewById(R.id.load_id);searchMoreBtn.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {currentPageCount++;MyThread th = new MyThread(currentPageCount, 20);searchMoreBtn.setVisibility(View.GONE);loadView.setVisibility(View.VISIBLE);th.start();}});grLv.addFooterView(view);}class MyThread extends Thread{private HttpClient httpClient;private int pageTo = 1;//默认第一页private int pageNum = 20;//默认每页显示15条public MyThread(int pageTo, int pageNum) {super();this.pageTo = pageTo;this.pageNum = pageNum;}@Overridepublic void run() {Looper.prepare();  httpClient = new DefaultHttpClient();String url = "http://192.168.1.103:8080/TransportMarket/mGoodsResourceAction!getGoodsResourceData.do?pg="+this.pageTo+"&nm="+this.pageNum;HttpPost post = new HttpPost(url);try {HttpResponse resp = httpClient.execute(post);String msg = EntityUtils.toString(resp.getEntity());JSONObject obj = new JSONObject(msg);String gl = obj.getString("gl");JSONArray ga = new JSONArray(gl);glist = new ArrayList<GoodsRes>();for(int i = 0; i<ga.length(); i++){JSONObject js = (JSONObject) ga.get(i);String id = js.getString("id");String tt = js.getString("tt");String cl = js.getString("cl");String sd = js.getString("sd");String pn = js.getString("pn");String ct = js.getString("ct");GoodsRes gr = new GoodsRes();gr.setId(id);gr.setPn(pn);gr.setCt(ct);gr.setTt(tt);gr.setSd(sd);glist.add(gr);}//ListView grLv = (ListView) findViewById(R.id.goods_listView);//ListItemAdapter adapter = new ListItemAdapter(glist,GoodsListActivity.this);//grLv.setAdapter(adapter);Message msgs = new Message();msgs.what = 1;myHandler.sendMessage(msgs);Looper.loop();  } catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (JSONException e) {e.printStackTrace();}}public int getPageTo() {return pageTo;}public void setPageTo(int pageTo) {this.pageTo = pageTo;}public int getPageNum() {return pageNum;}public void setPageNum(int pageNum) {this.pageNum = pageNum;}}public List<GoodsRes> getGlist() {return glist;}public void setGlist(List<GoodsRes> glist) {this.glist = glist;}public int getCurrentPageCount() {return currentPageCount;}public void setCurrentPageCount(int currentPageCount) {this.currentPageCount = currentPageCount;}@Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {lastItem = firstVisibleItem + visibleItemCount - 1;  //减1是因为上面加了个addFooterView}@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {// TODO Auto-generated method stubif(lastItem == glist.size()  && scrollState == this.SCROLL_STATE_IDLE){ currentPageCount++;MyThread th = new MyThread(currentPageCount, 20);searchMoreBtn.setVisibility(View.GONE);loadView.setVisibility(View.VISIBLE);th.start();}}}

以下是Adapter

package com.example.adapter;import java.util.List;import com.example.domain.GoodsRes;import com.example.helloworld.R;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class ListItemAdapter extends BaseAdapter{private List<GoodsRes> list;private Context ctx;public ListItemAdapter(List<GoodsRes> list, Context ctx) {super();this.list = list;this.ctx = ctx;}@Overridepublic int getCount() {return list.size();}@Overridepublic Object getItem(int index) {return list.get(index);}@Overridepublic long getItemId(int index) {return index;}@Overridepublic View getView(int index, View convertView, ViewGroup parent) {View v = convertView;if(v == null){LayoutInflater li = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);v = li.inflate(R.layout.goods_item,null); }if(list != null && list.size() > 0){TextView textView_title = (TextView) v.findViewById(R.id.goods_item_title);textView_title.setText(list.get(index).getTt());TextView textView_brief = (TextView) v.findViewById(R.id.goods_item_brief);textView_brief.setText(list.get(index).getSd());}return v;}public List<GoodsRes> getList() {return list;}public void setList(List<GoodsRes> list) {this.list = list;}public Context getCtx() {return ctx;}public void setCtx(Context ctx) {this.ctx = ctx;}}

以下是列表显示数据List的POJO

package com.example.domain;import java.io.Serializable;public class GoodsRes implements Serializable{private String id;private String tt;private String cl;private String sd;private String pn;private String ct;private String ot;private String cn;private String pd;private String pg;public String getId() {return id;}public void setId(String id) {this.id = id;}public String getTt() {return tt;}public void setTt(String tt) {this.tt = tt;}public String getCl() {return cl;}public void setCl(String cl) {this.cl = cl;}public String getSd() {return sd;}public void setSd(String sd) {this.sd = sd;}public String getPn() {return pn;}public void setPn(String pn) {this.pn = pn;}public String getCt() {return ct;}public void setCt(String ct) {this.ct = ct;}public String getOt() {return ot;}public void setOt(String ot) {this.ot = ot;}public String getCn() {return cn;}public void setCn(String cn) {this.cn = cn;}public String getPd() {return pd;}public void setPd(String pd) {this.pd = pd;}public String getPg() {return pg;}public void setPg(String pg) {this.pg = pg;}}

以下是xml文件

1.goods_list.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <ListView         android:id="@+id/goods_listView"        android:layout_width="wrap_content"        android:divider="@color/black"        android:dividerHeight="2dp"         android:layout_height="wrap_content">    </ListView>   </RelativeLayout>

2.goods_item.xml

<?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:descendantFocusability="blocksDescendants"    android:orientation="vertical" >    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content" >        <ImageView            android:id="@+id/goods_item_img"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:src="@drawable/ic_launcher" />        <LinearLayout            android:layout_width="0dp"            android:layout_height="fill_parent"            android:layout_weight="4"            android:orientation="vertical" >            <TextView                android:id="@+id/goods_item_title"                android:layout_width="wrap_content"                android:layout_height="0dp"                android:layout_weight="2"                android:gravity="center"                android:text="nihao" />            <TextView                android:id="@+id/goods_item_brief"                android:layout_width="wrap_content"                android:layout_height="0dp"                android:singleLine="true"                android:ellipsize="end"                android:layout_weight="1" />        </LinearLayout>       <!--  <LinearLayout            android:layout_width="0dp"            android:layout_height="fill_parent"            android:layout_weight="1" >            <Button                android:focusable="false"                android:id="@+id/goods_item_phone"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:background="@drawable/phone" />        </LinearLayout> -->    </LinearLayout></LinearLayout>

3.list_page_load.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:gravity="center_horizontal"    android:orientation="vertical"    android:paddingBottom="5dp">    <Button        android:id="@+id/search_more"        android:layout_width="fill_parent"        android:layout_height="32dp"        android:background="@drawable/sear_more"/>        <LinearLayout        android:id="@+id/load_id"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@color/red"        android:orientation="horizontal"        android:visibility="gone">        <ProgressBar            android:layout_width="match_parent"            android:layout_height="wrap_content"            style="?android:attr/progressBarStyleSmall"             android:indeterminateDrawable="@drawable/progressbar_shape"            android:layout_gravity="center_horizontal" />        <TextView            android:layout_width="wrap_content"            android:layout_height="fill_parent"            android:layout_marginLeft="10dp"            android:gravity="center_vertical"            android:text="正在加载..."            android:textSize="12dp" />    </LinearLayout></LinearLayout>