Android中ListView与CheckBox结合----多选与记录

来源：互联网发布：intel 超频软件编辑：程序博客网时间：2024/05/15 11:32

很多时候我们会用到ListView与CheckBox结合的东西，比如一个清单，可以用来多选，但是很多人似乎也在这个地方遇到很多问题，我刚开始学的时候也是遇到假选问题，当列表中数量多的之后，我勾选一个，滑动页面会发现条目也勾选上了，这明显与我们的要求不符合，后来网上找了找资料，用HashMap来记录一个CheckBox的勾选记录就解决了

以下是实现的的一个小Demo

这是XML ListView 每个item文件清单

    <?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" >                <RelativeLayout              android:id="@+id/outpatient_check_hospital"              android:layout_width="fill_parent"              android:layout_height="wrap_content"              android:layout_marginBottom="5.0dip"              android:layout_marginLeft="12.599976dip"              android:layout_marginRight="12.599976dip"              android:layout_marginTop="5.0dip"              android:gravity="center_vertical"               android:background="#AAAAAA">                    <LinearLayout                  android:id="@+id/linear_layout_up"                  android:layout_width="fill_parent"                  android:layout_height="wrap_content"                  android:layout_margin="10.0dip"                  android:gravity="center"                  android:orientation="horizontal" >                        <ImageView                      android:layout_width="10dip"                      android:layout_height="10dip"                      android:adjustViewBounds="false" />                        <TextView                      android:id="@+id/tv_device_name"                      android:layout_width="wrap_content"                      android:layout_height="wrap_content"                      android:layout_weight="2.0"                      android:text="名称"                      android:textColor="#ff323232"                      android:textSize="16.0sp"                      android:typeface="monospace" />                        <CheckBox                      android:id="@+id/checkBox1"                      android:layout_width="wrap_content"                      android:layout_height="wrap_content"                      android:text="" />                                </LinearLayout>          </RelativeLayout>            </LinearLayout>

这是显示ListView的页面，简单初始化几个数据

    public class MainActivity extends Activity {                private ListView listView;          private ListViewAdapter adapter;          private String[] beans = new String[] { "1", "2", "3", "4", "5", "6", "7",                  "8", "9", "10", "11", "12", "13","14","15","16","17","18","19" };                @Override          protected void onCreate(Bundle savedInstanceState) {              super.onCreate(savedInstanceState);              setContentView(R.layout.activity_main);                    initView();          }                    private void initView() {              // TODO Auto-generated method stub              Log.i("htp", "beans.size:" + beans.length);              listView = (ListView) findViewById(R.id.listView1);              adapter = new ListViewAdapter(MainActivity.this, beans);              listView.setAdapter(adapter);              listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);          }

下面就写一个Adapter类，我们依然继承BaseAdapter类。这里我们使用一个HashMap<Integer,boolean>的键值来记录checkbox在对应位置的选中状况

package com.example.listviewcheckboxdemo;    import java.util.HashMap;  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.TextView;    public class ListViewAdapter extends BaseAdapter {        private Context context;      private String[] beans;        // 用来控制CheckBox的选中状况      private static HashMap<Integer, Boolean> isSelected;        class ViewHolder {            TextView tvName;          CheckBox cb;      }        public ListViewAdapter(Context context, String[] beans) {          // TODO Auto-generated constructor stub          this.beans = beans;          this.context = context;          isSelected = new HashMap<Integer, Boolean>();          // 初始化数据          initDate();      }        // 初始化isSelected的数据      private void initDate() {          for (int i = 0; i < beans.length; i++) {              getIsSelected().put(i, false);          }      }        @Override      public int getCount() {          // TODO Auto-generated method stub          return beans.length;      }        @Override      public Object getItem(int position) {          // TODO Auto-generated method stub          return beans[position];      }        @Override      public long getItemId(int position) {          // TODO Auto-generated method stub          return position;      }        @Override      public View getView(final int position, View convertView, ViewGroup parent) {          // TODO Auto-generated method stub          // 页面          ViewHolder holder;          String bean = beans[position];          LayoutInflater inflater = LayoutInflater.from(context);          if (convertView == null) {              convertView = inflater.inflate(                      R.layout.assist_device_binding_list_item, null);              holder = new ViewHolder();              holder.cb = (CheckBox) convertView.findViewById(R.id.checkBox1);              holder.tvName = (TextView) convertView                      .findViewById(R.id.tv_device_name);              convertView.setTag(holder);          } else {              // 取出holder              holder = (ViewHolder) convertView.getTag();          }            holder.tvName.setText(bean);          // 监听checkBox并根据原来的状态来设置新的状态          holder.cb.setOnClickListener(new View.OnClickListener() {                public void onClick(View v) {                    if (isSelected.get(position)) {                      isSelected.put(position, false);                      setIsSelected(isSelected);                  } else {                      isSelected.put(position, true);                      setIsSelected(isSelected);                  }                }          });            // 根据isSelected来设置checkbox的选中状况          holder.cb.setChecked(getIsSelected().get(position));          return convertView;      }        public static HashMap<Integer, Boolean> getIsSelected() {          return isSelected;      }        public static void setIsSelected(HashMap<Integer, Boolean> isSelected) {          ListViewAdapter.isSelected = isSelected;      }  }

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