上拉加载 下拉刷新
package com.bwie.sx;
import java.io.IOException;
import java.util.Arrays;
import java.util.LinkedList;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import com.bwie.bean.List_news;
import com.bwie.bean.MyAdapter;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnLastItemVisibleListener;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import android.app.ListActivity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.IBinder.DeathRecipient;
import android.text.format.DateUtils;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class MainActivity extends ListActivity {
int index = 1;
private PullToRefreshListView mPullRefreshListView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mPullRefreshListView = (PullToRefreshListView) findViewById(R.id.pull_refresh_list);// 1
new GetDataTask()
.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/"
+ index);
// Set a listener to be invoked when the list should be refreshed.下拉刷新处理
mPullRefreshListView
.setOnRefreshListener(new OnRefreshListener<ListView>() { // 2
@Override
public void onRefresh(
PullToRefreshBase<ListView> refreshView) {
String label = DateUtils.formatDateTime(
getApplicationContext(),
System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME
| DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_ABBREV_ALL);
// Update the LastUpdatedLabel
refreshView.getLoadingLayoutProxy()
.setLastUpdatedLabel(label);// 3.刷新界面处理代理,显示新的时间
// Do work to refresh the list here.
new GetDataTask()
.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/"
+ index); // 4.执行自定义AsyncTask,进行数据的请求刷新
}
});
// Add an end-of-list listener //5.设置上拉加载处理
mPullRefreshListView
.setOnLastItemVisibleListener(new OnLastItemVisibleListener() {
@Override
public void onLastItemVisible() {
new GetDataTask()
.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/"
+ index);
Toast.makeText(MainActivity.this, "正在加载", 1).show();
}
});
}
private class GetDataTask extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... params) {
// Simulates a background job.
String json = null;
try {
Thread.sleep(4000);
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(params[0]);
try {
HttpResponse execute = httpClient.execute(httpGet);
int statusCode = execute.getStatusLine().getStatusCode();
if (statusCode == 200) {
HttpEntity entity = execute.getEntity();
json = EntityUtils.toString(entity);
Log.i("aaa", json);
}
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (InterruptedException e) {
}
return json;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Gson gson = new Gson();
final List_news fromJson = gson.fromJson(result, List_news.class);
Log.i("bbb", fromJson.getData().toString());
// mListItems.addFirst("Added after refresh...");
MyAdapter adapter = new MyAdapter(fromJson.getData(),
getApplicationContext());
ListView actualListView = mPullRefreshListView.getRefreshableView();
actualListView.setAdapter(adapter);
actualListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int arg2, long arg3) {
// TODO Auto-generated method stub
Intent intent = new Intent(MainActivity.this,
DetailsActivity.class);
intent.putExtra("list", fromJson.getData().get(arg2));
startActivity(intent);
}
});
adapter.notifyDataSetChanged();
index = index + 1;
// Call onRefreshComplete when the list has been refreshed.
mPullRefreshListView.onRefreshComplete();
}
}
}
package com.bwie.sx;
import com.bwie.bean.News;
import com.lidroid.xutils.BitmapUtils;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
public class DetailsActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.show_detail);
Intent intent = getIntent();
News news=(News) intent.getSerializableExtra("list");
ImageView imageView=(ImageView) findViewById(R.id.image_show);
TextView textView=(TextView) findViewById(R.id.text_show);
textView.setText(news.getNews_title());
BitmapUtils bitmapUtils=new BitmapUtils(getApplicationContext());
bitmapUtils.display(imageView, news.getPic_url());
}
}
package com.bwie.bean;
import java.util.List;
public class List_news {
List<News> data;
public List<News> getData() {
return data;
}
public void setData(List<News> data) {
this.data = data;
}
}
package com.bwie.bean;
import java.util.List;
import com.bwie.sx.R;
import com.lidroid.xutils.BitmapUtils;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class MyAdapter extends BaseAdapter {
List<News> list;
Context context;
public MyAdapter(List<News> list, Context context) {
super();
this.list = list;
this.context = context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return list.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return list.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
convertView = LayoutInflater.from(context).inflate(
R.layout.list_view, null);
viewHolder.textView = (TextView) convertView
.findViewById(R.id.text);
viewHolder.imageView = (ImageView) convertView
.findViewById(R.id.image);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.textView.setText(list.get(position).getNews_title());
BitmapUtils bitmapUtils = new BitmapUtils(context);
bitmapUtils.display(viewHolder.imageView, list.get(position)
.getPic_url());
return convertView;
}
class ViewHolder {
TextView textView;
ImageView imageView;
}
}
package com.bwie.bean;
import java.io.Serializable;
public class News implements Serializable{
String news_title;
String pic_url;
public String getNews_title() {
return news_title;
}
public void setNews_title(String news_title) {
this.news_title = news_title;
}
public String getPic_url() {
return pic_url;
}
public void setPic_url(String pic_url) {
this.pic_url = pic_url;
}
}
<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="com.bwie.sx.MainActivity" >
<com.handmark.pulltorefresh.library.PullToRefreshListView
android:id="@+id/pull_refresh_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:divider="#19000000"
android:dividerHeight="4dp"
android:fadingEdge="none"
android:fastScrollEnabled="false"
android:footerDividersEnabled="false"
android:headerDividersEnabled="false"
android:smoothScrollbar="true" />
</RelativeLayout>
list_view.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" >
<ImageView
android:id="@+id/image"
android:layout_width="70dp"
android:layout_height="70dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="38dp"
android:layout_marginTop="28dp"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/image"
android:layout_marginBottom="24dp"
android:layout_marginLeft="52dp"
android:layout_toRightOf="@id/image"
android:text="TextView" />
</RelativeLayout>
show_detail.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" >
<ImageView
android:id="@+id/image_show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="57dp"
android:src="@drawable/ic_launcher" />
<TextView
android:id="@+id/text_show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/image_show"
android:layout_centerHorizontal="true"
android:layout_marginTop="89dp"
android:text="TextView" />
</RelativeLayout>
