Android中ExpandableListView + BaseAdapter使用详解
Android中ListView的用法基本上学的时候都会使用，其中可以使用ArrayAdapter，SimpleAdapter，BaseAdapter去实现，这次主要使用的 ExpandableListView展示一种两层的效果，ExpandableListView是android中可以实现下拉list的一个控件类似于QQ那种我好友之后就是一排自己的好友，就是两层效果，实现的话使用SimpleExpandableListAdapter即可。
先看看效果：
页面布局代码：
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<?xml version="1.0" encoding="utf-8"?> android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:background="#f6f6f6"> <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent"> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true"> <include android:id="@+id/titleIndex" layout="@layout/title_main" /> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#e9e9e9" android:padding="10dp"> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <EditText android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/keywordstxt" android:background="@drawable/search_txt" android:paddingLeft="10dp" /> <ImageButton android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/searchbtn" android:background="@drawable/search_btn" /> </LinearLayout> </LinearLayout> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingLeft="10dp" android:paddingRight="10dp" android:layout_marginTop="2dp" android:layout_marginBottom="75dp"> <ExpandableListView android:id="@+id/list" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/view_yuan_morelist" android:cacheColorHint="#00000000" android:listSelector="#00000000" android:groupIndicator="@null" android:childDivider="#d5d5d5" android:dividerHeight="1dp" android:divider="#d5d5d5"/> </LinearLayout> </LinearLayout> <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true"> <LinearLayout android:orientation="horizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/adiv" android:background="@drawable/ad" /> </LinearLayout> </LinearLayout> </RelativeLayout></LinearLayout> |
Activity代码：
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package coalsms.kwstu.coalsms;import android.app.Activity;import android.app.AlertDialog;import android.app.ProgressDialog;import android.content.DialogInterface;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.view.View;import android.widget.EditText;import android.widget.ExpandableListView;import android.widget.ExpandableListView.OnChildClickListener;import android.widget.ImageView;import android.widget.Toast;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;import Adapter.expandableListAdapter;import Json.JsonTools;import http.HttpUtils;import models.DateList;import models.SmsBase;/** * Created by Administrator on 2014/10/26. */public class MainActivity extends Activity { ExpandableListView expandableListView=null; private expandableListAdapter adapter; private List<DateList> listGroup=null; private List<SmsBase> listked=null; EditText keywordstxt=null; private ProgressDialog progressDialoggroup; private ProgressDialog progressDialogked; private ImageView ad=null; @Override protected void onPause() { adapter.notifyDataSetChanged(); super.onPause(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); expandableListView = (ExpandableListView) findViewById(R.id.list); progress(); //加载广告信息 ad = (ImageView) findViewById(R.id.adiv); //图片资源 //得到可用的图片 Bitmap bitmap = getHttpBitmap(url); //显示 ad.setImageBitmap(bitmap); //搜索 keywordstxt = (EditText) findViewById(R.id.keywordstxt); ImageView searchBtn = (ImageView) findViewById(R.id.searchbtn); searchBtn.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setClass(MainActivity.this, SearchReasultActivity.class); Bundle bundle = new Bundle(); bundle.putString("keywordTxt",keywordstxt.getText().toString().trim()); intent.putExtras(bundle); startActivity(intent); } }); //设置 ImageView setup = (ImageView) findViewById(R.id.setup); setup.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Intent intent = new Intent(); intent.setClass(MainActivity.this, SetupActivity.class); startActivity(intent);// 启动Activity finish(); } }); //设置item点击的监听器 expandableListView.setOnChildClickListener(new OnChildClickListener() { @Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { return false; } }); expandableListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View clickedView, int groupPosition, long groupId) { adapter.Clear(); progressKey(listGroup.get(groupPosition).getDATETMP()); return false;//返回true表示此事件在此被处理了 } }); //点击某一项关闭其他项 expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() { @Override public void onGroupExpand(int groupPosition) { for (int i = 0; i < listGroup.size(); i++) { if (groupPosition != i) { expandableListView.collapseGroup(i); } } } }); } Handler handler = new Handler() { @Override public void handleMessage(Message msg) { Bundle data = null; data = msg.getData(); String jsonString = "",jsonStringKed = ""; switch (msg.what) { case 1: progressDialoggroup.cancel(); jsonString = (String) data.get("jsonString"); listGroup = JsonTools.getDateList( "DateList", jsonString); jsonStringKed = (String) data.get("jsonStringKed"); listked = JsonTools.getSmsBaseList( "SmsList", jsonStringKed); adapter= new expandableListAdapter(listGroup,listked,MainActivity.this); expandableListView.setAdapter(adapter); break; case 2: progressDialogked.cancel(); jsonString = (String) data.get("jsonString"); listked = JsonTools.getSmsBaseList( "SmsList", jsonString); if(listked.size()==0) Toast.makeText( MainActivity.this, "暂时无数",Toast.LENGTH_SHORT).show(); for (int i = 0; i < listked.size(); i++) { adapter.addItem(listked.get(i)); } adapter.notifyDataSetChanged(); break; } super.handleMessage(msg); } }; //获取组列表 public void progress() { progressDialoggroup = new ProgressDialog(this); progressDialoggroup.setMessage("正在加载......"); progressDialoggroup.setTitle("消息"); progressDialoggroup.show(); beginThread thread = new beginThread(); thread.start(); } class beginThread extends Thread { public void run() { handler.sendEmptyMessage(0); try { String jsonString="",jsonStringKed=""; jsonString = HttpUtils .getJsonContent(InitActivity.webserviceUrl + "****/getListDate?username="+****+"&days="+InitActivity.showDays); jsonStringKed = HttpUtils .getJsonContent(InitActivity.webserviceUrl + "88888/getListSms?888="+InitActivity.8888+"&curday=2013-01-01"); Message message = new Message(); Bundle data = new Bundle(); data.putString("jsonString", jsonString); data.putString("jsonStringKed", jsonStringKed); message.what = 1; message.setData(data); handler.sendMessage(message); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; //获取子项目列表 public void progressKey(String dateStr) { progressDialogked = new ProgressDialog(this); progressDialogked.setMessage("正在加载......"); progressDialogked.setTitle("消息"); progressDialogked.show(); beginKedThread thread = new beginKedThread(dateStr); thread.start(); } class beginKedThread extends Thread { String dateStr=""; public beginKedThread(String dateStr){ this.dateStr=dateStr; } public void run() { handler.sendEmptyMessage(0); try { String jsonString=""; jsonString = HttpUtils .getJsonContent(InitActivity.webserviceUrl + "888/8888?username="+InitActivity.888+"&curday="+dateStr); Message message = new Message(); Bundle data = new Bundle(); data.putString("jsonString", jsonString); message.what = 2; message.setData(data); handler.sendMessage(message); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }; /** * 获取网落图片资源 * @param url * @return */ public static Bitmap getHttpBitmap(String url){ URL myFileURL; Bitmap bitmap=null; try{ myFileURL = new URL(url); //获得连接 HttpURLConnection conn=(HttpURLConnection)myFileURL.openConnection(); //设置超时时间为6000毫秒，conn.setConnectionTiem(0);表示没有时间限制 conn.setConnectTimeout(6000); //连接设置获得数据流 conn.setDoInput(true); //不使用缓存 conn.setUseCaches(false); //这句可有可无，没有影响 //conn.connect(); //得到数据流 InputStream is = conn.getInputStream(); //解析得到图片 bitmap = BitmapFactory.decodeStream(is); //关闭数据流 is.close(); }catch(Exception e){ e.printStackTrace(); } return bitmap; }} |
expandableListAdapter代码
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package Adapter;import android.app.Activity;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Color;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.os.Bundle;import android.text.Html;import android.text.method.ArrowKeyMovementMethod;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseExpandableListAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import java.io.InputStream;import java.util.HashMap;import java.util.List;import coalsms.kwstu.coalsms.InitActivity;import coalsms.kwstu.coalsms.R;import models.DateList;import models.SmsBase;import models.VersionModel;/** * Created by Administrator on 2014/10/27. */public class expandableListAdapter extends BaseExpandableListAdapter { List<DateList> lists = null; List<SmsBase> kedList = null; Activity activity = null; int curItem=0; private DBAdapter db = null; public expandableListAdapter(List<DateList> list, List<SmsBase> KedList , Activity activity) {// super(); this.lists = list; this.kedList = KedList; this.activity = activity; this.db = new DBAdapter(activity); } //设置组视图的图片 int[] logos = new int[]{R.drawable.listlbg}; //重写ExpandableListAdapter中的各个方法 @Override public int getGroupCount() { // TODO Auto-generated method stub return lists.size(); } public void addItem(SmsBase item) { kedList.add(item); } public void Clear() { // TODO Auto-generated method stub this.kedList.clear(); } @Override public Object getGroup(int groupPosition) { // TODO Auto-generated method stub return lists.get(groupPosition); } @Override public long getGroupId(int groupPosition) { // TODO Auto-generated method stub return groupPosition; } @Override public int getChildrenCount(int groupPosition) { // TODO Auto-generated method stub return kedList.size(); } @Override public Object getChild(int groupPosition, int childPosition) { // TODO Auto-generated method stub return kedList.get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { // TODO Auto-generated method stub return childPosition; } @Override public boolean hasStableIds() { // TODO Auto-generated method stub return true; } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { AbsListView.LayoutParams lp = new AbsListView.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT); AbsListView.LayoutParams lpTxt = new AbsListView.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT); RelativeLayout.LayoutParams rpl = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); rpl.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE); RelativeLayout.LayoutParams rpr = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.MATCH_PARENT); rpr.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE); // TODO Auto-generated method stub RelativeLayout rl = new RelativeLayout( activity); LinearLayout ll = new LinearLayout( activity); LinearLayout lr = new LinearLayout( activity); ll.setOrientation(0); ll.setLayoutParams(rpl); lr.setLayoutParams(rpr); lr.setPadding(0, 20, 15, 0); ImageView logo = new ImageView(activity); logo.setImageResource(logos[0]); logo.setPadding(0, 0, 0, 0); ll.addView(logo); TextView textViewDate = new TextView( activity); textViewDate.setLayoutParams(lp); textViewDate.setGravity(Gravity.CENTER_VERTICAL); textViewDate.setPadding(0, 0, 10, 0); textViewDate.setTextSize(16); textViewDate.setTextColor(Color.rgb(86,86,86)); textViewDate.setText(lists.get(groupPosition).getDATETMP()); ll.addView(textViewDate); TextView textViewWeek = new TextView( activity); textViewWeek.setLayoutParams(lp); textViewWeek.setGravity(Gravity.CENTER_VERTICAL); textViewWeek.setPadding(0, 0, 30, 0); textViewWeek.setTextSize(24); if(groupPosition==0) { textViewWeek.setTextColor(Color.rgb(0, 153, 68)); textViewWeek.setText("今天"); } else { textViewWeek.setTextColor(Color.rgb(0, 104, 183)); textViewWeek.setText(lists.get(groupPosition).getWEEKTMP()); } ll.addView(textViewWeek); TextView textViewCount = new TextView( activity); textViewCount.setLayoutParams(lpTxt); textViewCount.setGravity(Gravity.CENTER); textViewCount.setPadding(0, 0, 0, 0); textViewCount.setTextSize(20); textViewCount.setTextColor(Color.WHITE); textViewCount.setText(lists.get(groupPosition).getCOUNTTMP()); textViewCount.setBackgroundResource(R.drawable.count_bg); lr.addView(textViewCount); rl.addView(ll); rl.addView(lr); return rl; } @Override public View getChildView(int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { // TODO Auto-generated method stub convertView = LayoutInflater.from(activity).inflate(R.layout.layout_listview_item, null); TextView t1 = (TextView)convertView.findViewById(R.id.ItemTitle); TextView t2 = (TextView)convertView.findViewById(R.id.ItemText); ImageView iv = (ImageView)convertView.findViewById(R.id.scbtn); String content=kedList.get(childPosition).getCONTENT(); iv.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { //写入本地数据库 db.open(); long id; //写入数据 //判断是否收藏过 Cursor c = db.getCollectionById(kedList.get(childPosition).getID()); if(c.getCount()==0) { id = db.insertCollection(kedList.get(childPosition).getID(), kedList.get(childPosition).getCONTENT()); Toast toast = Toast.makeText(activity, "收藏成功", Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); }else{ Toast toast = Toast.makeText(activity, "此短讯已经收藏，不能重复收藏", Toast.LENGTH_LONG); toast.setGravity(Gravity.CENTER, 0, 0); toast.show(); } db.close(); } }); t1.setTextSize(InitActivity.fontSize); t1.setTextColor(Color.rgb(86, 86, 86)); t1.setTextIsSelectable(true); t1.setText(Html.fromHtml(content)); t2.setText(Html.fromHtml(kedList.get(childPosition).getSENDTIME())); t2.setTextSize(InitActivity.fontSize); t2.setTextColor(Color.rgb(204,204,204)); return convertView; } final Html.ImageGetter imageGetter = new Html.ImageGetter() { public Drawable getDrawable(String source) { Drawable d = null; try { InputStream is = new DefaultHttpClient() .execute(new HttpGet(source)).getEntity() .getContent(); Bitmap bm = BitmapFactory.decodeStream(is); d = new BitmapDrawable(bm); d.setBounds(0, 0, bm.getWidth(), bm.getHeight()); } catch (Exception e) { e.printStackTrace(); } return d; } }; /*** 半角转换为全角 * * @param input * @return */ public static String ToDBC(String input) { char[] c = input.toCharArray(); for (int i = 0; i < c.length; i++) { if (c[i] == 12288) { c[i] = (char) 32; continue; } if (c[i] > 65280 && c[i] < 65375) c[i] = (char) (c[i] - 65248); } return new String(c); } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { // TODO Auto-generated method stub return true; }} |
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