Android ExpandableListView CheckBox只選Clicked複選框

我對ExpandableListViews和CheckBoxes有個簡單的問題。我將在下面顯示當前的代碼。我目前有一個ExpandableListView與每個子行中的複選框。Android ExpandableListView CheckBox只選Clicked複選框

這些checkboxes可以選擇，但問題是我有我的ExpandableListView許多孩子。所以問題是，當我檢查框時，它顯示選擇了多個複選框。因此，如果我檢查第一個孩子複選框，它也顯示第6或第7個孩子也被選中。

package com.WebGems.MW3CustomClasses; 

import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.Map; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.drawable.Drawable; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.CheckBox; 
import android.widget.ExpandableListView; 
import android.widget.ExpandableListView.OnChildClickListener; 
import android.widget.ImageView; 
import android.widget.SimpleExpandableListAdapter; 
import android.widget.TextView; 

public class PrimaryWeapon extends Activity { 
    ExpandableListView listPrimaryWeapon; 


    //Strike Package ArrayLists 

    ArrayList assaultPackage = new ArrayList(); 




    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.primary_weapon); 
     listPrimaryWeapon = (ExpandableListView)findViewById(R.id.listView1); 

     Bundle extras = getIntent().getExtras(); 
     String type = extras.getString("type"); 


     if(type.equals("assault")) { 
      showAssaultPackageList(); 
     } 


    } 
    private void showAssaultPackageList() { 
     // TODO Auto-generated method stub 

     assaultPackage.add("UAV"); 
     assaultPackage.add("CARE PACKAGE"); 
     assaultPackage.add("I.M.S."); 
     assaultPackage.add("PREDATOR MISSILE"); 
     assaultPackage.add("SENTRY GUN"); 
     assaultPackage.add("PRECISION AIRSTRIKE"); 
     assaultPackage.add("ATTACK HELICOPTER"); 
     assaultPackage.add("STRAFE RUN"); 
     assaultPackage.add("AH-6 OVERWATCH"); 
     assaultPackage.add("REAPER"); 
     assaultPackage.add("ASSAULT DRONE"); 
     assaultPackage.add("AC-130"); 
     assaultPackage.add("PAVE LOW"); 
     assaultPackage.add("JUGGERNAUT"); 
     assaultPackage.add("OSPREY GUNNER"); 



     // Construct Expandable List 
     final String NAME = "name"; 
     final String IMAGE = "image"; 
     final String DATA = "data"; 
     final String NUMBER = "number"; 

     final LayoutInflater layoutInflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
     final ArrayList<HashMap<String, String>> headerData = new ArrayList<HashMap<String, String>>(); 

     final HashMap<String, String> group1 = new HashMap<String, String>(); 
     group1.put(NAME, "Assault Package"); 
     headerData.add(group1); 

     final ArrayList<ArrayList<HashMap<String, Object>>> childData = new ArrayList<ArrayList<HashMap<String, Object>>>(); 

     final ArrayList<HashMap<String, Object>> group1data = new ArrayList<HashMap<String, Object>>(); 
     childData.add(group1data); 

     int assaultPackageCounter = 0; 
     for(int arm = 0; arm < assaultPackage.size(); ++arm) { 
      final HashMap<String, Object> assaultPackageMap = new HashMap<String, Object>(); 
      assaultPackageMap.put(NAME, assaultPackage.get(arm)); 
      if(assaultPackageCounter == 0) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.uav)); 
       assaultPackageMap.put(DATA, "UAV DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.three)); 
      } 
      if(assaultPackageCounter == 1) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.carepackage)); 
       assaultPackageMap.put(DATA, "CARE PACKAGE DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.four)); 
      } 
      if(assaultPackageCounter == 2) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.ims)); 
       assaultPackageMap.put(DATA, "IMS DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.five)); 
      } 
      if(assaultPackageCounter == 3) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.predatormissile)); 
       assaultPackageMap.put(DATA, "PREDATOR MISSILE DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.five)); 
      } 
      if(assaultPackageCounter == 4) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.sentrygun)); 
       assaultPackageMap.put(DATA, "SENTRY GUN DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.five)); 
      } 
      if(assaultPackageCounter == 5) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.precisionairstrike)); 
       assaultPackageMap.put(DATA, "PRECISION AIRSTRIKE DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.six)); 
      } 
      if(assaultPackageCounter == 6) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.attackhelicopter)); 
       assaultPackageMap.put(DATA, "ATTACK HELICOPTER DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.seven)); 
      } 
      if(assaultPackageCounter == 7) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.straferun)); 
       assaultPackageMap.put(DATA, "STRAFE RUN DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.nine)); 
      } 
      if(assaultPackageCounter == 8) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.ahsixoverwatch)); 
       assaultPackageMap.put(DATA, "AH-6 OVERWATCH DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.nine)); 
      } 
      if(assaultPackageCounter == 9) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.reaper)); 
       assaultPackageMap.put(DATA, "REAPER DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.nine)); 
      } 
      if(assaultPackageCounter == 10) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.assaultdrone)); 
       assaultPackageMap.put(DATA, "ASSAULT DRONE DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.ten)); 
      } 
      if(assaultPackageCounter == 11) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.aconethreezero)); 
       assaultPackageMap.put(DATA, "AC-130 DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.twelve)); 
      } 
      if(assaultPackageCounter == 12) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.pavelow)); 
       assaultPackageMap.put(DATA, "PAVE LOW DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.twelve)); 
      } 
      if(assaultPackageCounter == 13) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.juggernaut)); 
       assaultPackageMap.put(DATA, "JUGGERNAUT DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.fifteen)); 
      } 
      if(assaultPackageCounter == 14) { 
       assaultPackageMap.put(IMAGE, getResources().getDrawable(R.drawable.ospreygunner)); 
       assaultPackageMap.put(DATA, "OSPREY GUNNER DESCRIPTION"); 
       assaultPackageMap.put(NUMBER, getResources().getDrawable(R.drawable.seventeen)); 
      } 
      assaultPackageCounter++; 
      group1data.add(assaultPackageMap); 
     } 
     assaultPackageCounter = 0; 

     // Set up some sample data in both groups 
     /*for(int i=0; i<10; ++i) { 
      final HashMap<String, Object> map = new HashMap<String,Object>(); 
      map.put(NAME, "Child " + i); 
      //map.put(DATA, "Data " + i); 
      map.put(IMAGE, getResources().getDrawable((i%3==0? R.drawable.arrowright : R.drawable.arrowdown))); 
      (i%2==0 ? group1data : group2data).add(map); 
     }*/ 

     listPrimaryWeapon.setAdapter(new SimpleExpandableListAdapter(
       this, 
       headerData, 
       R.layout.group_row, 
       new String[] { NAME, DATA }, // the names of the data 
       new int[] { R.id.groupname }, // the text field to populate with the field data 
       childData, 
       0, 
       null, 
       new int[] {} 
      ) { 
       @Override 
       public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { 
        final View v = super.getChildView(groupPosition, childPosition, isLastChild, convertView, parent); 

        // Populate your custom view here 
        ((TextView)v.findViewById(R.id.name)).setText((String) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(NAME)); 
        ((TextView)v.findViewById(R.id.textView1)).setText((String) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(DATA)); 
        ((ImageView)v.findViewById(R.id.image)).setImageDrawable((Drawable) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(IMAGE)); 
        ((ImageView)v.findViewById(R.id.imageView1)).setImageDrawable((Drawable) ((Map<String,Object>)getChild(groupPosition, childPosition)).get(NUMBER)); 
        CheckBox cb = (CheckBox)v.findViewById(R.id.checkBox1); 
        cb.setClickable(false); 
        return v; 
       } 

       @Override 
       public View newChildView(boolean isLastChild, ViewGroup parent) { 
        return layoutInflater.inflate(R.layout.strikepackagelayout, null, false); 
       } 
      } 
     ); 
     ExpandableListView list = (ExpandableListView) findViewById(R.id.listView1); 
     list.setChoiceMode(ExpandableListView.CHOICE_MODE_MULTIPLE); 
     list.setOnChildClickListener(new OnChildClickListener(){ 
      public boolean onChildClick(ExpandableListView parent, View v, 
        int groupPosition, int childPosition, long id) { 
       CheckBox cb = (CheckBox)v.findViewById(R.id.checkBox1); 
       if(cb != null){ 
        cb.toggle(); 
       } 
       Log.d("type", "Group: " + groupPosition + ", Child: " + childPosition); 
       System.out.println("Group:"+groupPosition+", Child: "+childPosition); 
       return true; 
      } 
     }); 
     listPrimaryWeapon.expandGroup(0); 




    } 
}

來源

2011-12-07 user1025013

這是因爲在ExpandableListView中使用回收View。正如你所看到的，有一個包含View的字段「View convertView」，這個字段將被作爲View已經存在的SAME ID回收。因此，當您尋找v.findViewById(R.id.checkBox1)時，可以有多個具有給定ID的「v」元素 - 這會讓Android選擇多個CheckBox。重寫它的唯一方法（我現在知道）是從super.getChildView(...)中刪除「covertView」，並用「null」替換它。這真的是GC不友好的，但是...還有什麼可以做的。

我會盡快進行調查，以更高效的方式做到這一點。

更新：所以我想通過其他方式。我創建了包含選定複選框的字段。然後我setTag(...)到與我保存到字段相同的複選框。

來源

2011-12-15 15:50:38 cadavre

作爲可擴展列表視圖每次移動時都要回收視圖。所以你需要保存每個視圖的狀態。

1>爲每個複選框設置不同的ID。類似的東西 checkBox.setId（groupPosition + 1）;

2>所選擇的複選框ID添加到哈希映射對象像

checkBox.setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() { 

            @Override 
            public void onCheckedChanged(if (checkBox.isChecked()) { 
              mapViewState.put(checkBox.getId(), 
                checkBoxSelected); 
             } else { 
              mapViewState.remove(checkBox 
                .getId()); 
             } 

            } 
           });

，然後從HashMap中加載的複選框的狀態，或迭代它來獲得所選擇的值。

來源

2012-03-22 09:11:16

Android ExpandableListView CheckBox只選Clicked複選框

回答

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