layout_picture_list.xml
<? xml version = "1.0" encoding = "utf-8" ?>
< FrameLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:layout_width = "fill_parent"
android:layout_height = "fill_parent"
android:background = "@drawable/app_bg"
android:orientation = "vertical" >
< ViewSwitcher
android:id = "@+id/viewswitcher_news_top"
android:layout_width = "match_parent"
android:layout_height = "match_parent"
android:layout_gravity = "center" >
</ ViewSwitcher >
< ListView
android:id = "@+id/picture_id"
android:layout_width = "match_parent"
android:layout_height = "match_parent"
android:cacheColorHint = "@color/transparent"
android:divider = "#00000000"
android:listSelector = "#00000000" />
</ FrameLayout >
PictureListActivity.java
package com.cps.media.ui.picture;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import com.cps.media.R;
import com.cps.media.model.PictureItem;
import com.cps.media.util.CONST;
import com.cps.media.util.Util;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.ViewSwitcher;
import android.widget.AdapterView.OnItemClickListener;
public class PictureListActivity extends Activity {
private ListView mListView;
private MyAdapter mAdapter;
private List<PictureItem> mList;
private ViewSwitcher viewSwitcher;
private int mId;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.layout_picture_list);
mListView = (ListView) findViewById(R.id.picture_id);
mId = getIntent().getIntExtra("id", 1);
viewSwitcher = (ViewSwitcher) findViewById(R.id.viewswitcher_news_top);
viewSwitcher.addView(getLayoutInflater().inflate(
R.layout.layout_progress_page, null));
requestData();
}
private void requestData() {
viewSwitcher.setVisibility(View.VISIBLE);
viewSwitcher.showNext();
Thread t = new Thread() {
@Override
public void run() {
super.run();
HttpClient client = new DefaultHttpClient();
StringBuilder builder = new StringBuilder();
int error = 1;
JSONArray array = null;
HttpGet myget = new HttpGet(CONST.URL_PICTURE_LIST.replace("{0}", mId+""));
try {
HttpResponse response = client.execute(myget);
BufferedReader reader = new BufferedReader(
new InputStreamReader(response.getEntity()
.getContent()));
for (String s = reader.readLine(); s != null; s = reader
.readLine()) {
builder.append(s);
}
JSONObject jsonObject = new JSONObject(builder.toString());
error = jsonObject.getInt("errno");
String errormsg = jsonObject.getString("errmsg");
Log.v("wgp", "url=" + myget.getURI().toString());
Log.v("wgp", "error=" + error);
Log.v("wgp", "errormsg=" + errormsg);
if (error == 0) {
array = jsonObject.getJSONArray("data");
PictureItem item;
mList = new ArrayList<PictureItem>();
for (int i = 0; i < array.length(); i++) {
item = new PictureItem();
item.setId(array.getJSONObject(i).getInt("id"));
item.setTitle(array.getJSONObject(i).getString(
"title"));
item.setImgUrl(array.getJSONObject(i).getString(
"img"));
mList.add(item);
}
if (mList.size() == 0) {
handler.sendEmptyMessage(-1);
} else {
handler.sendEmptyMessage(1);
}
}
} catch (Exception e) {
e.printStackTrace();
handler.sendEmptyMessage(-1);
} finally {
}
}
};
t.start();
}
Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if (msg.what == 1) {
mAdapter = new MyAdapter();
mListView.setAdapter(mAdapter);
mListView.setOnItemClickListener(mListItemListener);
}
viewSwitcher.setVisibility(View.INVISIBLE);
}
};
private OnItemClickListener mListItemListener = new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Util.getHttpImageURI(mList.get(position).getImgUrl()), "image/*");
startActivity(intent);
}
};
class MyAdapter extends BaseAdapter {
private AsyncImageTask mImageTask;
@Override
public int getCount() {
// TODO Auto-generated method stub
return mList.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mList.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return mList.get(position).getId();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = getLayoutInflater().inflate(
R.layout.layout_picture_list_item, null);
holder.tv_name = (TextView) convertView
.findViewById(R.id.name_id);
holder.tv_image = (ImageView) convertView
.findViewById(R.id.type_image_id);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
mImageTask = new AsyncImageTask(holder.tv_image);
mImageTask.execute(mList.get(position).getImgUrl());
holder.tv_name.setText(mList.get(position).getTitle());
return convertView;
}
class ViewHolder {
TextView tv_name;
ImageView tv_image;
int type;
}
private class AsyncImageTask extends AsyncTask<String, Integer, Object> {
private ImageView image;
public AsyncImageTask(ImageView image) {
this.image = image;
}
@Override
protected Object doInBackground(String... params) {
try {
if(Util.CPSE_CACHE.exists())
return Util.getHttpImageURI(params[0]);
else{
return Util.getHttpBitmap(params[0]);
}
} catch (Exception e) {
// TODO: handle exception
}
return null;
}
@Override
protected void onPostExecute(Object result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
if (image != null && result != null) {
if(result instanceof Uri){
image.setImageURI((Uri)result);
}else if(result instanceof Bitmap){
image.setImageBitmap((Bitmap)result);
}
} else if (image != null && result == null) {
image.setImageResource(R.drawable.news_default);
}
}
}
}
}
