Android ListView构建支持单选和多选的投票项目

/** * 主题项目类 * @author zoupeiyang * */public class SubjectItem { /**  * 主题id  */ private String subjectId; /**  * 主题名称  */ private String subjectName; /**  * 主题id  */ private String itemId; /**  * 主题名称  */ private String itemName; /**  * 是否多选  */ private Boolean isMultiChoice; public String getSubjectId() {  return subjectId; } public void setSubjectId(String subjectId) {  this.subjectId = subjectId; } public String getSubjectName() {  return subjectName; } public void setSubjectName(String subjectName) {  this.subjectName = subjectName; } public String getItemId() {  return itemId; } public void setItemId(String itemId) {  this.itemId = itemId; } public String getItemName() {  return itemName; } public void setItemName(String itemName) {  this.itemName = itemName; } public Boolean getIsMultiChoice() {  return isMultiChoice; } public void setIsMultiChoice(Boolean isMultiChoice) {  this.isMultiChoice = isMultiChoice; }}

/**  * 模拟从数据库表获取投票主题项目的数据源  *   * @return  */ public static List<SubjectItem> getSubjectItems() {  List<SubjectItem> list = new ArrayList<SubjectItem>();  HashMap<String, Boolean> subjectMap = new HashMap<String, Boolean>();  for (int i = 0; i < 3; i++) {   for (int j = 0; j < 3; j++) {    SubjectItem item = new SubjectItem();    item.setSubjectId(i + "");    //为了方便主题标题和主题项目的布局，集合中同一个主题的项目，只有主题第一个项目的对象的主题名称不为空，其它为空    //这样显示ListView的每列时如果主题名称为空就隐藏主题名称    if (subjectMap.containsKey(item.getSubjectId())) {     item.setSubjectName("");    } else {     item.setSubjectName("投票主题" + i);     subjectMap.put(item.getSubjectId(), true);    }    item.setItemId(i + "" + j);    item.setItemName("项目名称" + i + "" + j);    item.setIsMultiChoice(i % 2 == 1 ? true : false);    list.add(item);   }  }  return list; }

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <!-- 投票主题ID，默认隐藏 --> <TextView  android:id="@+id/tv_subject_id"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:text=""  android:visibility="gone" />  <!-- 投票主题下项目ID，默认隐藏 --> <TextView  android:id="@+id/tv_subject_item_id"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:text=""  android:visibility="gone" />  <!-- 投票主题类型，true为多选，否则为单选，默认隐藏 -->  <TextView  android:id="@+id/tv_is_multi_choice"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:text=""  android:visibility="gone" />  <!-- 投票主题名称，只有主题下的第一个项目才会显示主题名称，其它项目不显示 --> <TextView  android:id="@+id/tv_subject_name"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:layout_marginTop="20dp"  android:layout_marginBottom="10dp"  android:textSize="14sp"  android:textColor="#1387DD"  android:textStyle="bold"  android:text="" /> <LinearLayout  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="horizontal" >   <!-- 投票项目名称 -->  <TextView   android:id="@+id/tv_subject_item_name"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:gravity="center_vertical" />   <!-- 多选项目显示CheckBox -->  <CheckBox   android:id="@+id/cb_subject_item"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:clickable="false"   android:focusable="false"   android:focusableInTouchMode="false"   android:gravity="center_vertical" />   <!-- 单选项目显示RadioButton -->  <RadioButton   android:id="@+id/rb_subject_item"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:clickable="false"   android:focusable="false"   android:focusableInTouchMode="false"   android:gravity="center_vertical" /> </LinearLayout></LinearLayout>

<?xml version="1.0" encoding="UTF-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffffffff" > <RelativeLayout  android:id="@+id/rl_head"  android:layout_width="match_parent"  android:layout_height="45dp"  android:layout_alignParentTop="true"  android:background="#0C99EF"  android:paddingLeft="10dp" >  <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_centerInParent="true"   android:text="投票项目"   android:textColor="#ffffffff"   android:textSize="16sp" /> </RelativeLayout> <!-- 投票项目ListView --> <ListView  android:id="@+id/lv_subject"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_below="@id/rl_head"  android:layout_marginBottom="50dp"  android:layout_marginLeft="10dp" > </ListView> <Button  android:id="@+id/btn_add"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_alignParentBottom="true"  android:layout_marginBottom="10dp"  android:text="提交" /></RelativeLayout>

package com.example.listviewcheckbox.adapter;import java.util.HashMap;import java.util.List;import com.example.listviewcheckbox.R;import com.example.listviewcheckbox.entity.SubjectItem;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.CheckBox;import android.widget.RadioButton;import android.widget.TextView;public class SubjectAdapter extends BaseAdapter {  private List<SubjectItem> list; private Context context; //存储所有主题的项目的选中状态，遍历这个容器可以获取选中的项目信息 private HashMap<String,Boolean> subjectItemMap; private LayoutInflater inflater;  public class ViewHolder{  //投票主题id控件  public TextView tvSubjectId;  //投票主题名称控件  public TextView tvSubjectName;  //投票项目名称控件  public TextView tvSubjectItemName;  //投票项目id控件  public TextView tvSubjectItemId;  //投票主题类型（单选或多选）控件  public TextView tvIsMultiChoice;  //选中CheckBox控件（主题类型为多选时显示）  public CheckBox cbSubjectItem;  //选中RadioButton控件（主题类型为单选时显示）  public RadioButton rbSubjectItem;   }  public SubjectAdapter(List<SubjectItem> list,Context context) {  this.list=list;  this.context=context;   inflater = LayoutInflater.from(context);  this.subjectItemMap=new HashMap<String, Boolean>();  //初始化subjectItemMap，默认所有项目为未选中状态  for (int i = 0; i < list.size(); i++) {   this.subjectItemMap.put(list.get(i).getItemId(), false);  } } @Override public int getCount() {  // TODO Auto-generated method stub  return list.size(); } @Override public Object getItem(int position) {  // TODO Auto-generated method stub  return list.get(position); } @Override public long getItemId(int position) {  // TODO Auto-generated method stub  return position; } @Override public View getView(int position, View convertView, ViewGroup parent) {  // TODO Auto-generated method stub  ViewHolder viewHolder = null;  SubjectItem item = list.get(position);  if(convertView!=null&&convertView.getId()==R.id.lv_subject)  {   viewHolder=(ViewHolder)convertView.getTag();  }  else {   viewHolder = new ViewHolder();   convertView=inflater.inflate(R.layout.listview_subject_item, null);   viewHolder.tvSubjectId=(TextView)convertView.findViewById(R.id.tv_subject_id);   viewHolder.tvSubjectName=(TextView) convertView.findViewById(R.id.tv_subject_name);   viewHolder.tvSubjectItemId = (TextView) convertView.findViewById(R.id.tv_subject_item_id);   viewHolder.tvSubjectItemName = (TextView) convertView.findViewById(R.id.tv_subject_item_name);   viewHolder.cbSubjectItem = (CheckBox) convertView.findViewById(R.id.cb_subject_item);   viewHolder.rbSubjectItem = (RadioButton) convertView.findViewById(R.id.rb_subject_item);   viewHolder.tvIsMultiChoice = (TextView) convertView.findViewById(R.id.tv_is_multi_choice );     }  //如果项目名称为空就隐藏当前项的产品名称，即所有子项目只允许第一个子项目出现产品名称  if(item.getSubjectName().equals(""))  {   viewHolder.tvSubjectName.setVisibility(View.GONE);  }  else {   viewHolder.tvSubjectName.setText(item.getSubjectName());  }  viewHolder.tvSubjectItemId.setText(item.getItemId());  viewHolder.tvSubjectId.setText(item.getSubjectId());  viewHolder.tvSubjectItemName.setText(item.getItemName());  viewHolder.tvIsMultiChoice.setText(item.getIsMultiChoice().toString());  //当前项目为多选项目  if(item.getIsMultiChoice().toString().equals("true"))  {   viewHolder.cbSubjectItem.setVisibility(View.VISIBLE);   viewHolder.rbSubjectItem.setVisibility(View.GONE);   viewHolder.cbSubjectItem.setChecked(this.subjectItemMap.get(item.getItemId()));     }  //当前项目为单选项目  else {   viewHolder.cbSubjectItem.setVisibility(View.GONE);   viewHolder.rbSubjectItem.setVisibility(View.VISIBLE);   viewHolder.rbSubjectItem.setChecked(this.subjectItemMap.get(item.getItemId()));  }  convertView.setTag(viewHolder);  return convertView; }  /**  * 获取所有主题的项目的选中状态容器  * @return  */  public HashMap<String,Boolean> getSubjectItemMap() {   return this.subjectItemMap;  }}

public class SubjectActivity extends Activity { private ListView lvSubject; private SubjectAdapter subjectAdapter; private List<SubjectItem> list; private Button btnAdd; // 用来保存单选主题当前选中的项目，这样用户在切换选择同一个主题下其它选项时能够将之前选中的项目的状态设置为未选状态 private HashMap<String, String> radioButtonSelectedMaps; @Override public void onCreate(Bundle savedInstanceState) {  // TODO Auto-generated method stub  super.onCreate(savedInstanceState);  setContentView(R.layout.listview_subject_activity);  lvSubject = (ListView) findViewById(R.id.lv_subject);  btnAdd = (Button) findViewById(R.id.btn_add);  //从数据源获取投票主题和项目信息  list = DataService.getSubjectItems();  subjectAdapter = new SubjectAdapter(list, this);  lvSubject.setAdapter(subjectAdapter);  radioButtonSelectedMaps = new HashMap<String, String>();  // 提交投票事件处理  btnAdd.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    String selectValues="选中信息:";    //遍历用户选中项目，可以根据实际需求获取选中项目的任何信息    for (int i = 0; i < list.size(); i++) {     if(subjectAdapter.getSubjectItemMap().get(list.get(i).getItemId()))     {      selectValues+="项目ID:"+list.get(i).getItemId()+"项目名称:"+list.get(i).getItemName();     }         }    Toast.makeText(SubjectActivity.this, selectValues.equals("选中信息:")?"未选中任何信息":selectValues, Toast.LENGTH_LONG).show();   }  });  // ListView控件每一行点击事件处理  lvSubject.setOnItemClickListener(new OnItemClickListener() {   @Override   public void onItemClick(AdapterView<?> parent, View view,     int position, long id) {    // TODO Auto-generated method stub    ViewHolder viewHolder = (ViewHolder) view.getTag();    // 如果当前行是多选项目    if (viewHolder.tvIsMultiChoice.getText().equals("true")) {     viewHolder.cbSubjectItem.toggle();     subjectAdapter.getSubjectItemMap().put(viewHolder.tvSubjectItemId.getText().toString(),viewHolder.cbSubjectItem.isChecked());    }         //如果当前行为单选项目，注意单选项目选中后需要将同一主题下已经选中的项目设置为未选中状态    else {     String currentSubjectIdSelected=viewHolder.tvSubjectId.getText().toString();     String currentSubjectItemId=viewHolder.tvSubjectItemId.getText().toString();     //判断该单选主题是否有已经选中项目，如果有需要将它的选中状态设置为未选中     if (radioButtonSelectedMaps.containsKey(currentSubjectIdSelected)) {      subjectAdapter.getSubjectItemMap().put(radioButtonSelectedMaps.get(currentSubjectIdSelected),false);     }     //将当前选中的项目设置为该单选主题的选中项目     radioButtonSelectedMaps.put(currentSubjectIdSelected,currentSubjectItemId);     viewHolder.rbSubjectItem.toggle();     subjectAdapter.getSubjectItemMap().put(currentSubjectItemId,viewHolder.rbSubjectItem.isChecked());     //更新ListView     updateListView();    }}}); }  /**  * 更新ListView  */ private void updateListView() {  subjectAdapter.notifyDataSetChanged(); }}

// 提交投票事件处理  btnAdd.setOnClickListener(new OnClickListener() {   @Override   public void onClick(View v) {    // TODO Auto-generated method stub    String selectValues="选中信息:";    //遍历用户选中项目，可以根据实际需求获取选中项目的任何信息    for (int i = 0; i < list.size(); i++) {     if(subjectAdapter.getSubjectItemMap().get(list.get(i).getItemId()))     {      selectValues+="项目ID:"+list.get(i).getItemId()+"项目名称:"+list.get(i).getItemName();     }         }    Toast.makeText(SubjectActivity.this, selectValues.equals("选中信息:")?"未选中任何信息":selectValues, Toast.LENGTH_LONG).show();   }  });