大道之行，天下为公。这篇文章主要讲述android 项目学习随笔十七（ListViewGridView显示组图）相关的知识，希望能为你提供帮助。
ListView、GridView显示组图，处理机制相同

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< ?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="match_parent" android:layout_margin="10dp" android:background="@drawable/pic_list_item_bg" android:orientation="vertical" > < ImageView android:id="@+id/iv_icon" android:layout_width="match_parent" android:layout_height="160dp" android:scaleType="centerCrop" android:src="https://www.songbingjia.com/android/@drawable/news_pic_default" /> < TextView android:id="@+id/tv_title" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="8dp" android:singleLine="true" android:text="标题" android:textColor="#000" android:textSize="18sp" /> < /LinearLayout> < /LinearLayout>

list_item_photo.xml
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< ?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:orientation="vertical" > < FrameLayout android:layout_width="match_parent" android:layout_height="match_parent" > < ListView android:id="@+id/lv_list" android:layout_width="match_parent" android:layout_height="match_parent" android:cacheColorHint="#fff" android:divider="@null" > < /ListView> < GridView android:id="@+id/gv_list" android:layout_width="match_parent" android:layout_height="match_parent" android:numColumns="2" android:visibility="gone" > < /GridView> < /FrameLayout> < /LinearLayout>

pager_menu_detail_photo.xml
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import java.util.ArrayList; /** * 组图对象封装 * */ public class PhotoBean { public int retcode; public PhotoData data; public class PhotoData { public ArrayList< PhotoNewsData> news; }public class PhotoNewsData { public String id; public String listimage; public String pubdate; public String title; public String url; } }

PhotoBean
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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.zhsh66.R; import com.itheima.zhsh66.base.BaseMenuDetailPager; import com.itheima.zhsh66.domain.PhotoBean; import com.itheima.zhsh66.domain.PhotoBean.PhotoNewsData; import com.itheima.zhsh66.global.Constants; import com.itheima.zhsh66.utils.CacheUtils; import com.lidroid.xutils.BitmapUtils; import com.lidroid.xutils.HttpUtils; import com.lidroid.xutils.ViewUtils; 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; import com.lidroid.xutils.view.annotation.ViewInject; /** * 菜单详情页-组图 * */ public class PhotosMenuDetailPager extends BaseMenuDetailPager implements OnClickListener {@ViewInject(R.id.lv_list) private ListView lvList; @ViewInject(R.id.gv_list) private GridView gvList; private ArrayList< PhotoNewsData> mPhotoList; private boolean isList = true; // 当前界面状态private ImageButton btnDisplay; public PhotosMenuDetailPager(Activity activity, ImageButton btnDisplay) { super(activity); this.btnDisplay = btnDisplay; btnDisplay.setOnClickListener(this); }@Override public View initView() { View view = View.inflate(mActivity, R.layout.pager_menu_detail_photo, null); ViewUtils.inject(this, view); return view; }@Override public void initData() { String cache = CacheUtils.getCache(Constants.PHOTOS_URL, mActivity); if (!TextUtils.isEmpty(cache)) { processResult(cache); }getDataFromServer(); }private void getDataFromServer() { HttpUtils utils = new HttpUtils(); utils.send(HttpMethod.GET, Constants.PHOTOS_URL, new RequestCallBack< String> () {@Override public void onSuccess(ResponseInfo< String> responseInfo) { processResult(responseInfo.result); CacheUtils.setCache(Constants.PHOTOS_URL, responseInfo.result, mActivity); }@Override public void onFailure(HttpException error, String msg) { error.printStackTrace(); Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT) .show(); } }); }protected void processResult(String result) { Gson gson = new Gson(); PhotoBean photoBean = gson.fromJson(result, PhotoBean.class); mPhotoList = photoBean.data.news; lvList.setAdapter(new PhotoAdapter()); gvList.setAdapter(new PhotoAdapter()); }class PhotoAdapter extends BaseAdapter {private BitmapUtils mBitmapUtils; public PhotoAdapter() { mBitmapUtils = new BitmapUtils(mActivity); mBitmapUtils.configDefaultLoadingImage(R.drawable.news_pic_default); }@Override public int getCount() { return mPhotoList.size(); }@Override public PhotoNewsData 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 = null; if (convertView == null) { convertView = View.inflate(mActivity, R.layout.list_item_photo, null); holder = new ViewHolder(); holder.tvTitle = (TextView) convertView .findViewById(R.id.tv_title); holder.ivIcon = (ImageView) convertView .findViewById(R.id.iv_icon); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); }PhotoNewsData item = getItem(position); holder.tvTitle.setText(item.title); mBitmapUtils.display(holder.ivIcon, item.listimage); return convertView; }}static class ViewHolder { public TextView tvTitle; public ImageView ivIcon; }@Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_display: // 如果当前是列表, 要切换成grid, 如果是grid,就切换成列表 if (isList) { isList = false; lvList.setVisibility(View.GONE); gvList.setVisibility(View.VISIBLE); btnDisplay.setImageResource(R.drawable.icon_pic_list_type); } else { isList = true; lvList.setVisibility(View.VISIBLE); gvList.setVisibility(View.GONE); btnDisplay.setImageResource(R.drawable.icon_pic_grid_type); }break; default: break; } } }

PhotosMenuDetailPager 共用一个Adapter
protected void processResult(String result) {
Gson gson = new Gson();
PhotoBean photoBean = gson.fromJson(result, PhotoBean.class);
mPhotoList = photoBean.data.news;
lvList.setAdapter(new PhotoAdapter());
gvList.setAdapter(new PhotoAdapter());
}
缓存到本地
public void initData() {
String cache = CacheUtils.getCache(Constants.PHOTOS_URL, mActivity);
if (!TextUtils.isEmpty(cache)) {
processResult(cache);
}
getDataFromServer();
}
------------------------------------------------------------------------------
初始化标题按钮（Base  ）

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< ?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:orientation="vertical" > < include layout="@layout/title_bar" /> < FrameLayout android:id="@+id/fl_content" android:layout_width="match_parent" android:layout_height="match_parent" > < /FrameLayout> < /LinearLayout>

View Code
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import android.app.Activity; import android.view.View; import android.view.View.OnClickListener; import android.widget.FrameLayout; import android.widget.ImageButton; import android.widget.TextView; import com.itheima.zhsh66.MainActivity; import com.itheima.zhsh66.R; import com.jeremyfeinstein.slidingmenu.lib.SlidingMenu; /** * 五个标签页的基类 * */ public abstract class BasePager {public Activity mActivity; // 标签页面的根布局 public View mRootView; public TextView tvTitle; public ImageButton btnMenu; // 帧布局容器, 将来要动态向里面添加内容 public FrameLayout flContent; // 组图切换按钮 public ImageButton btnDisplay; public BasePager(Activity activity) { mActivity = activity; initView(); }/** * 初始化布局 */ public void initView() { mRootView = View.inflate(mActivity, R.layout.base_pager, null); tvTitle = (TextView) mRootView.findViewById(R.id.tv_title); btnMenu = (ImageButton) mRootView.findViewById(R.id.btn_menu); flContent = (FrameLayout) mRootView.findViewById(R.id.fl_content); btnDisplay = (ImageButton) mRootView.findViewById(R.id.btn_display); btnMenu.setOnClickListener(new OnClickListener() {@Override public void onClick(View v) { toggle(); } }); }/** * 侧边栏展开或者收起的方法 */ private void toggle() { MainActivity mainUI = (MainActivity) mActivity; SlidingMenu slidingMenu = mainUI.getSlidingMenu(); slidingMenu.toggle(); // 开关(如果状态为开,它就关; 如果状态为关,它就开) }/** * 初始化数据 */ public abstract void initData(); }

BasePager ------------------------------------------------------------------------------
【android 项目学习随笔十七（ListViewGridView显示组图）】对按钮的传递、调用
if (pager instanceof PhotosMenuDetailPager) {


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import java.util.ArrayList; import android.app.Activity; import android.text.TextUtils; import android.view.View; import android.widget.Toast; import com.google.gson.Gson; import com.itheima.zhsh66.MainActivity; import com.itheima.zhsh66.base.BaseMenuDetailPager; import com.itheima.zhsh66.base.BasePager; import com.itheima.zhsh66.base.impl.menudetail.InteractMenuDetailPager; import com.itheima.zhsh66.base.impl.menudetail.NewsMenuDetailPager; import com.itheima.zhsh66.base.impl.menudetail.PhotosMenuDetailPager; import com.itheima.zhsh66.base.impl.menudetail.TopicMenuDetailPager; import com.itheima.zhsh66.domain.NewsMenuData; import com.itheima.zhsh66.global.Constants; import com.itheima.zhsh66.utils.CacheUtils; 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 * */ public class NewsCenterPager extends BasePager {// 菜单详情页集合 private ArrayList< BaseMenuDetailPager> mMenuDetailPagers; private NewsMenuData mNewsMenuData; // 新闻分类信息网络数据public NewsCenterPager(Activity activity) { super(activity); }@Override public void initData() { System.out.println("新闻中心初始化..."); tvTitle.setText("新闻"); // 1.首先先看本地有没有缓存 // 2.有缓存,直接加载缓存 String cache = CacheUtils.getCache(Constants.CATEGORIES_URL, mActivity); if (!TextUtils.isEmpty(cache)) { // 有缓存 System.out.println("发现缓存...."); processResult(cache); }// 即使发现有缓存,仍继续调用网络, 获取最新数据 getDataFromServer(); }/** * 从服务器获取数据 需要权限: < uses-permission * android:name="android.permission.INTERNET"/> */ private void getDataFromServer() { HttpUtils utils = new HttpUtils(); utils.send(HttpMethod.GET, Constants.CATEGORIES_URL, new RequestCallBack< String> () {@Override public void onSuccess(ResponseInfo< String> responseInfo) { // 请求成功 String result = responseInfo.result; // 获取json字符串 // System.out.println("result:" + result); processResult(result); // 写缓存 CacheUtils.setCache(Constants.CATEGORIES_URL, result, mActivity); }@Override public void onFailure(HttpException error, String msg) { // 请求失败 error.printStackTrace(); Toast.makeText(mActivity, msg, Toast.LENGTH_SHORT) .show(); } }); }/** * 解析json数据 * * @param result */ protected void processResult(String result) { // gson-> json Gson gson = new Gson(); mNewsMenuData = https://www.songbingjia.com/android/gson.fromJson(result, NewsMenuData.class); System.out.println("解析结果:" + mNewsMenuData); // 获取侧边栏对象 MainActivity mainUI = (MainActivity) mActivity; LeftMenuFragment leftMenuFragment = mainUI.getLeftMenuFragment(); // 将网络数据设置给侧边栏 leftMenuFragment.setData(mNewsMenuData.data); // 初始化4个菜单详情页 mMenuDetailPagers = new ArrayList< BaseMenuDetailPager> (); mMenuDetailPagers.add(new NewsMenuDetailPager(mActivity, mNewsMenuData.data.get(0).children)); mMenuDetailPagers.add(new TopicMenuDetailPager(mActivity)); mMenuDetailPagers.add(new PhotosMenuDetailPager(mActivity, btnDisplay)); mMenuDetailPagers.add(new InteractMenuDetailPager(mActivity)); // 菜单详情页-新闻作为初始页面 setCurrentMenuDetailPager(0); }// 给新闻中心页面的FrameLayout填充布局 protected void setCurrentMenuDetailPager(int position) { BaseMenuDetailPager pager = mMenuDetailPagers.get(position); // 移除之前所有的view对象, 清理屏幕 flContent.removeAllViews(); flContent.addView(pager.mRootView); pager.initData(); // 初始化数据// 更改标题 tvTitle.setText(mNewsMenuData.data.get(position).title); // 组图页面需要显示切换按钮 if (pager instanceof PhotosMenuDetailPager) { btnDisplay.setVisibility(View.VISIBLE); } else { btnDisplay.setVisibility(View.GONE); } }}

NewsCenterPager  

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