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android开发中 listview和checkbox结合

2024-10-22 22:09:02   213人阅读

通过重写listview的adapter，将listview和checkbox结合在一起，并且二者可以分别操作。

[1].[文件] activity_menu.xml ~ 2KB   下载(13)跳至 [1] [2] [3] [4]

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<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"
>
     <ListView
        android:id="@+id/android:list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="2.0"
        android:scrollbars="vertical"/>
    <TextView
        android:id="@+id/foodname"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1.0"
        android:textSize="20dp"
        android:text=""/>
      <TextView
        android:id="@+id/price"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1.0"
        android:textSize="20dp"
        android:text=""/>
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
        <Button
            android:id="@+id/call"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@drawable/thphone1"
            android:layout_weight="1.0"
        android:textSize="20dp"
            android:text="电话订餐"/>
         <Button
        android:id="@+id/cancelButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1.0"
        android:textSize="20dp"
        android:text="取消"/>
        
    </LinearLayout>
     
</LinearLayout>

[2].[文件] listview_style.xml ~ 1KB   下载(7)跳至 [1] [2] [3] [4]

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<?xmlversion="1.0"encoding="utf-8"?>
<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RelativeLayout01"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:paddingBottom="4dip"
    android:paddingLeft="12dip"
    android:paddingRight="12dip">
<CheckBox
        android:id="@+id/CheckBox01"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:focusable="false"
         android:clickable="false"
        android:focusableInTouchMode="false"
        android:gravity="center_vertical"
        android:paddingTop="12dip"
        >
    </CheckBox>
    <TextView
        android:id="@+id/topTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="TextView1"
        android:textSize="20dip"/>
    <TextView
        android:id="@+id/bottomTextView"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/topTextView"
        android:text="TextView2">
    </TextView>
</RelativeLayout>

[3].[文件] MenuActivity.java ~ 6KB   下载(7)跳至 [1] [2] [3] [4]

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package com.amaker.wlo;
importjava.io.InputStream; importjava.net.URL; importjava.net.URLConnection; importjava.util.ArrayList; importjava.util.HashMap; importjava.util.List;
importjavax.xml.parsers.DocumentBuilder; importjavax.xml.parsers.DocumentBuilderFactory;
importorg.w3c.dom.Document; importorg.w3c.dom.NodeList;
importandroid.app.Activity; importandroid.content.Context; importandroid.content.Intent; importandroid.content.SharedPreferences; importandroid.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.Button;import android.widget.ListView;import android.widget.RelativeLayout;import android.widget.TextView;
importcom.amaker.util.HttpUtil;
publicclass MenuActivity extends Activity {
    privateListView listview;
    privateTextView totalPrice;
    privateTextView totalFood;
    privateButton callBtn;
    privateButton cancleBtn;
    @Override
    protectedvoid onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_menu);
        
        listview=(ListView)findViewById(android.R.id.list);
        
         totalPrice=(TextView)findViewById(R.id.price);
         
         totalFood=(TextView)findViewById(R.id.foodname);
         
         callBtn=(Button)findViewById(R.id.call);
         callBtn.setOnClickListener(callListener);
         
         cancleBtn=(Button)findViewById(R.id.cancelButton);
         cancleBtn.setOnClickListener(canclelistener);
         
         Context context=null;
            try {
                context= createPackageContext("com.amaker.wlo", Context.CONTEXT_IGNORE_SECURITY);
            } catch (NameNotFoundException e) {
               // TODO Auto-generated catch block                e.printStackTrace();
            }
            SharedPreferences preferences = context.getSharedPreferences("shop_id", MODE_WORLD_WRITEABLE);
            int shopid=preferences.getInt("shopid",0);
            
          
         
        String urlStr = HttpUtil.BASE_URL + "servlet/FoodServlet?shopId="+shopid;
        try {
            // 实例化URL             URL url = new URL(urlStr);
            // URLConnection 实例             URLConnection conn = url.openConnection();
            // 获得输入流             InputStream in = conn.getInputStream();
            // 获得DocumentBuilderFactory对象             DocumentBuilderFactory factory = DocumentBuilderFactory
                   .newInstance();
            // 获得DocumentBuilder对象             DocumentBuilder builder = factory.newDocumentBuilder();
            // 获得Document对象             Document doc = builder.parse(in);
            // 获得节点列表             NodeList nl = doc.getElementsByTagName("food");
            // Spinner数据             ArrayList<HashMap<String, Object>> listitem = newArrayList<HashMap<String, Object>>();
            // 获得XML数据             for (inti = 0; i < nl.getLength(); i++) {
               // 商家編號                 // 商家名字foodPrice                 String foodName = doc.getElementsByTagName("foodName")
                       .item(i).getFirstChild().getNodeValue();
               String foodPrice = doc.getElementsByTagName("foodPrice")
                       .item(i).getFirstChild().getNodeValue();
               HashMap<String, Object> map = newHashMap<String, Object>();
               map.put("foodName", foodName);
               map.put("foodPrice", foodPrice+"元");
               listitem.add(map);
            }
            MenuListAdapter listAdapter = newMenuListAdapter(this,listitem, R.layout.listview_style,
                   new String[] { "foodName", "foodPrice"}, 
                   new int[] { R.id.topTextView, R.id.bottomTextView }
            );
            
            listview.setAdapter(listAdapter);
            listview.setOnItemClickListener(getMenu);
        }catch (Exception e) {
            e.printStackTrace();
        }
        
        
    }
    
    OnItemClickListener getMenu=newOnItemClickListener() {
        
        int sumprice=0; //定义一个存储所有价格的变量         String sumfood=""; //定义一个存储所有食物的变量         @Override
        public void onItemClick(AdapterView<?> parent, View view, intposition,
               long id) {
            
               RelativeLayout lr = (RelativeLayout) view;
               
              
            
               
               
               
               TextView tvtop = (TextView) lr.getChildAt(1);
                
               String foodName=tvtop.getText().toString()+" ";
                
                
                
                
               TextView tv = (TextView) lr.getChildAt(2);
               
               String s = tv.getText().toString();
               
              int foodprice=Integer.parseInt(s.substring(0, s.indexOf("元")));
               
               
              
              
             // 取得ViewHolder对象，这样就省去了通过层层的findViewById去实例化我们需要的cb实例的步骤               ViewHolder holder = (ViewHolder) view.getTag();
               // 改变CheckBox的状态                 holder.cb.toggle();
               // 将CheckBox的选中状况记录下来                 MenuListAdapter.getIsSelected().put(position, holder.cb.isChecked()); 
               // 调整选定条目                 if (holder.cb.isChecked() == true) {
                   sumprice=sumprice+foodprice;
                   sumfood=sumfood+foodName;
               } else {
                   sumprice=sumprice-foodprice;
                   sumfood=sumfood.replace(foodName, "");
                    
               }
               // 用TextView显示                 totalPrice.setText("你預計消費：  "+sumprice);
                   
                   
               totalFood.setText("你已經點了：  "+sumfood);
                
               
            
        }
    };
         
          
        OnClickListener callListener=newOnClickListener() {
        
        @Override
        public void onClick(View v) {
            Context context=null;
            try {
                context= createPackageContext("com.amaker.wlo", Context.CONTEXT_IGNORE_SECURITY);
            } catch (NameNotFoundException e) {
               // TODO Auto-generated catch block                e.printStackTrace();
            }
            SharedPreferences pref = context.getSharedPreferences("phoneinfo", MODE_WORLD_WRITEABLE);
            String PhoneNum=pref.getString("PhoneNum","");
            Intent intent = newIntent(Intent.ACTION_CALL,Uri.parse("tel:"+PhoneNum));  
            startActivity(intent);  
            
        }
    };
               
    OnClickListener canclelistener=newOnClickListener() {
        
        @Override
        public void onClick(View v) {
            Intent intent=newIntent(MenuActivity.this,MainMenuActivity.class);
            startActivity(intent);
            
        }
    };
                
        
}

[4].[文件] MenuListAdapter.java ~ 2KB   下载(7)跳至 [1] [2] [3] [4]

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package com.amaker.wlo;
importjava.util.ArrayList; importjava.util.HashMap; importjava.util.List; importjava.util.Map;
importandroid.content.Context; importandroid.view.LayoutInflater; importandroid.view.View; importandroid.view.ViewGroup; importandroid.widget.BaseAdapter; importandroid.widget.CheckBox; importandroid.widget.SimpleAdapter; importandroid.widget.TextView;
publicclass MenuListAdapter extends SimpleAdapter {
    // 用来控制CheckBox的选中状况    private staticHashMap<Integer, Boolean> isSelected;
    // 用来导入布局    private LayoutInflater inflater =null;
    privateList<? extends Map<String, ?>> Mdata;
    publicMenuListAdapter(Context context,
            List<? extends Map<String, ?>> data, int resource, String[] from,
            int[] to) {
        super(context, data, resource, from, to);
        this.Mdata=http://www.mamicode.com/data;
        isSelected=new HashMap<Integer, Boolean>();
        inflater = LayoutInflater.from(context);
        initDate();
    }
    
    privatevoid initDate(){
        for(inti=0; i<Mdata.size();i++) {
            getIsSelected().put(i,false);
        }
    }
    @Override
    publicView getView(intposition, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if (convertView == null) {
            // 获得ViewHolder对象             holder = new ViewHolder();
            // 导入布局并赋值给convertview             convertView = inflater.inflate(R.layout.listview_style, null);
            holder.tv1 = (TextView) convertView.findViewById(R.id.topTextView);
            holder.tv2 = (TextView) convertView.findViewById(R.id.bottomTextView);
            holder.cb = (CheckBox) convertView.findViewById(R.id.CheckBox01);
            // 为view设置标签             convertView.setTag(holder);
        } else {
            // 取出holder             holder = (ViewHolder) convertView.getTag();
        }
        // 设置list中TextView的显示         //holder.tv1.setText();         holder.tv1.setText(((Map)getItem(position)).get("foodName").toString());
        holder.tv2.setText(((Map)getItem(position)).get("foodPrice").toString());
        // 根据isSelected来设置checkbox的选中状况         holder.cb.setChecked(getIsSelected().get(position));
        return convertView;
    }
    publicstatic HashMap<Integer, Boolean> getIsSelected() {
        return isSelected;
    }
    publicstatic void setIsSelected(HashMap<Integer, Boolean> isSelected) {
        MenuListAdapter.isSelected = isSelected;
    }
}
classViewHolder {
    TextView tv1;
    TextView tv2;
    CheckBox cb;
}

android开发中 listview和checkbox结合


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