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layout_picture_list.xml

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<? 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" >

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??? < ViewSwitcher

??????? android:id = "@+id/viewswitcher_news_top"

??????? android:layout_width = "match_parent"

??????? android:layout_height = "match_parent"

??????? android:layout_gravity = "center" >

??? </ ViewSwitcher >

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??? < 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" />

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</ FrameLayout >

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PictureListActivity.java

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package com.cps.media.ui.picture;

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import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

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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;

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import com.cps.media.R;

import com.cps.media.model.PictureItem;

import com.cps.media.util.CONST;

import com.cps.media.util.Util;

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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;

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public class PictureListActivity extends Activity {

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??? private ListView mListView;

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??? private MyAdapter mAdapter;

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??? private List<PictureItem> mList;

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??? private ViewSwitcher viewSwitcher;

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??? private int mId;

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??? @Override

??? protected void onCreate(Bundle savedInstanceState) {

?????? // TODO Auto-generated method stub

?????? super.onCreate(savedInstanceState);

?????? setContentView(R.layout.layout_picture_list);

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?????? 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();

??? }

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??? 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+""));

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????????????? 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);

???????????????????? }

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???????????????????? if (mList.size() == 0) {

???????????????????????? handler.sendEmptyMessage(-1);

???????????????????? } else {

???????????????????????? handler.sendEmptyMessage(1);

???????????????????? }

????????????????? }

????????????? } catch (Exception e) {

????????????????? e.printStackTrace();

????????????????? handler.sendEmptyMessage(-1);

????????????? } finally {

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????????????? }

?????????? }

?????? };

?????? t.start();

??? }

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??? Handler handler = new Handler() {

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?????? public void handleMessage(android.os.Message msg) {

?????????? if (msg.what == 1) {

????????????? mAdapter = new MyAdapter();

????????????? mListView.setAdapter(mAdapter);

????????????? mListView.setOnItemClickListener(mListItemListener);

?????????? }

?????????? viewSwitcher.setVisibility(View.INVISIBLE);

?????? }

??? };

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??? private OnItemClickListener mListItemListener = new OnItemClickListener() {

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?????? @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);

?????? }

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??? };

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??? class MyAdapter extends BaseAdapter {

??????

?????? private AsyncImageTask mImageTask;

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?????? @Override

?????? public int getCount() {

?????????? // TODO Auto-generated method stub

?????????? return mList.size();

?????? }

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?????? @Override

?????? public Object getItem(int position) {

?????????? // TODO Auto-generated method stub

?????????? return mList.get(position);

?????? }

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?????? @Override

?????? public long getItemId(int position) {

?????????? // TODO Auto-generated method stub

?????????? return mList.get(position).getId();

?????? }

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?????? @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());

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?????????? return convertView;

?????? }

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??? ??? class ViewHolder {

?????????? TextView tv_name;

?????????? ImageView tv_image;

?????????? int type;

?????? }

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?????? private class AsyncImageTask extends AsyncTask<String, Integer, Object> {

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?????????? private ImageView image;

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?????????? public AsyncImageTask(ImageView image) {

????????????? this.image = image;

?????????? }

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?????????? @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;

?????????? }

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?????????? @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);

????????????? }

?????????? }

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?????? }

??? }

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}

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