我在ExpandableListViews上使用CheckBoxes快速提问。我将在下面显示当前的代码。我目前有一个ExpandableListView，每个子行都有一个复选框。
可以选择这些checkboxes，但问题是我的ExpandableListView中有很多孩子。所以问题是当我选中框时，它会显示选中了多个复选框。因此，如果我检查第一个子复选框，它还会显示第6个或第7个孩子也被选中。
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);
}
}
答案 0 :(得分：2)
As Expandable list view每次移动时回收视图。所以你需要保存每个视图的状态。
1＆GT;为每个复选框设置不同的ID。类似的东西 checkBox.setId（groupPosition + 1）;
2 - ;将选定的复选框id添加到哈希映射对象，如
checkBox.setOnCheckedChangeListener(
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(if (checkBox.isChecked()) {
mapViewState.put(checkBox.getId(),
checkBoxSelected);
} else {
mapViewState.remove(checkBox
.getId());
}
}
});
然后从HashMap加载复选框的状态，或者迭代它以获取所选值。
答案 1 :(得分：0)
这是因为在ExpandableListView中使用了回收View。如您所见，有一个字段“View convertView”，其中包含View，它将以SAME ID作为View已经存在于屏幕上。因此，当您查找v.findViewById(R.id.checkBox1)时，可以有多个具有给定ID的“v”元素 - 这会让Android选择多个CheckBox。覆盖它的唯一方法（我现在知道）是从super.getChildView(...)中删除“covertView”并将其替换为“null”。这真的是GC不友好但是......还有什么可做的。
我会尽快调查，以更有效的方式做到这一点。
更新：
所以我以其他方式想到了它。我创建了包含所选复选框的字段。然后我setTag(...)查看带有与我保存到字段相同的复选框的视图。