android124 zhihuibeijing 新闻中心-组图

package com.itheima.zhbj52.base.menudetail;

import java.util.ArrayList;

import android.app.Activity;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.gson.Gson;
import com.itheima.zhbj52.R;
import com.itheima.zhbj52.base.BaseMenuDetailPager;
import com.itheima.zhbj52.domain.PhotosData;
import com.itheima.zhbj52.domain.PhotosData.PhotoInfo;
import com.itheima.zhbj52.domain.PhotosData.PhotosInfo;
import com.itheima.zhbj52.global.GlobalContants;
import com.itheima.zhbj52.utils.CacheUtils;
import com.lidroid.xutils.BitmapUtils;
import com.lidroid.xutils.HttpUtils;
import com.lidroid.xutils.exception.HttpException;
import com.lidroid.xutils.http.ResponseInfo;
import com.lidroid.xutils.http.callback.RequestCallBack;
import com.lidroid.xutils.http.client.HttpRequest.HttpMethod;

/**
* 新闻中心-组图
*/
public class PhotoMenuDetailPager extends BaseMenuDetailPager {
/*public abstract class BaseMenuDetailPager {
public Activity mActivity;
public View mRootView;// 根布局对象
public BaseMenuDetailPager(Activity activity) {
mActivity = activity;
mRootView = initViews();
}
public abstract View initViews();
public void initData() {
}
}*/

private ListView lvPhoto;
private GridView gvPhoto;
private ArrayList<PhotoInfo> mPhotoList;
private PhotoAdapter mAdapter;
private ImageButton btnPhoto;

public PhotoMenuDetailPager(Activity activity, ImageButton btnPhoto) {//btnPhoto对象通过构造函数传过来。
super(activity);
this.btnPhoto = btnPhoto;
btnPhoto.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
changeDisplay();
}
});
}

@Override
public View initViews() {
View view = View.inflate(mActivity, R.layout.menu_photo_pager, null);
//menu_photo_pager.xml
/*<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@+id/lv_photo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#fff"           背景色为白色
android:divider="@null" />              没有分割线
<GridView
android:id="@+id/gv_photo"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:numColumns="2"                     设置为2列
android:visibility="gone" />               默认隐藏。点击可以切换用ListView或者GridView。
</FrameLayout>*/

lvPhoto = (ListView) view.findViewById(R.id.lv_photo);
gvPhoto = (GridView) view.findViewById(R.id.gv_photo);
return view;
}

@Override
public void initData() {
String cache = CacheUtils
.getCache(GlobalContants.PHOTOS_URL, mActivity);
//PHOTOS_URL = "http://10.0.2.2:8080/zhbj/photos/photos_1.json";
if (!TextUtils.isEmpty(cache)) {
}
getDataFromServer();
}

private void getDataFromServer() {
HttpUtils utils = new HttpUtils();
utils.send(HttpMethod.GET, GlobalContants.PHOTOS_URL,
new RequestCallBack<String>() {
@Override
public void onSuccess(ResponseInfo<String> responseInfo) {
String result = (String) responseInfo.result;
parseData(result);
// 设置缓存
CacheUtils.setCache(GlobalContants.PHOTOS_URL, result,
mActivity);
}

@Override
public void onFailure(HttpException error, String msg) {
Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT)
.show();
error.printStackTrace();
}
});
}

protected void parseData(String result) {
Gson gson = new Gson();
PhotosData data = gson.fromJson(result, PhotosData.class);
/*public class PhotosData {
public int retcode;
public PhotosInfo data;
public class PhotosInfo {
public String title;
public ArrayList<PhotoInfo> news;
}
public class PhotoInfo {
public String id;
public String listimage;
public String pubdate;
public String title;
public String type;
public String url;
}
}*/
mPhotoList = data.data.news;// 获取组图列表集合

if (mPhotoList != null) {
mAdapter = new PhotoAdapter();
lvPhoto.setAdapter(mAdapter);//使用同一个mAdapter
gvPhoto.setAdapter(mAdapter);
}
}

class PhotoAdapter extends BaseAdapter {

private BitmapUtils utils;

public PhotoAdapter() {
utils = new BitmapUtils(mActivity);
utils.configDefaultLoadingImage(R.drawable.news_pic_default);//默认加载图片
}

@Override
public int getCount() {
return mPhotoList.size();
}

@Override
public PhotoInfo getItem(int position) {
return mPhotoList.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = View.inflate(mActivity, R.layout.list_photo_item,null);
/*<?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="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:background="@drawable/pic_list_item_bg"
android:gravity="center"
android:orientation="vertical" >
<ImageView
android:id="@+id/iv_pic"
android:layout_width="match_parent"
android:layout_height="180dp"
android:scaleType="centerCrop"
android:src="@drawable/news_pic_default" />
<TextView
android:id="@+id/tv_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="标题"
android:singleLine="true"
android:textColor="#000"
android:textSize="22sp" />
</LinearLayout>
</LinearLayout>*/
holder = new ViewHolder();
holder.tvTitle = (TextView) convertView.findViewById(R.id.tv_title);
holder.ivPic = (ImageView) convertView.findViewById(R.id.iv_pic);

convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
PhotoInfo item = getItem(position);
holder.tvTitle.setText(item.title);
utils.display(holder.ivPic, item.listimage);//加载图片，默认BitmapUtils对图片提供了缓存。
return convertView;
}

}

static class ViewHolder {
public TextView tvTitle;
public ImageView ivPic;
}

private boolean isListDisplay = true;// 是否是列表展示

/**
* 切换展现方式
*/
private void changeDisplay() {
if (isListDisplay) {
isListDisplay = false;
lvPhoto.setVisibility(View.GONE);
gvPhoto.setVisibility(View.VISIBLE);

btnPhoto.setImageResource(R.drawable.icon_pic_list_type);

} else {
isListDisplay = true;
lvPhoto.setVisibility(View.VISIBLE);
gvPhoto.setVisibility(View.GONE);

btnPhoto.setImageResource(R.drawable.icon_pic_grid_type);
}
}
}