机器人：在ListView复选框（所选元素的奇怪行为）机器人、所选、复选框、元素
我发现here和这里类似的问题，但问题是稍有不同。
I found here and here similar issues, but the problem is slightly different.
在一个ListView，我尽量把适配器（从底座适配器扩展），其内容复选框。
In a ListView, I try to put an adapter (extends from base Adapter) which contents checkbox.
列表视图布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/mainLayout"
>
<Button
android:id="@+id/close_cat"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:onClick="buttonClick"
android:text="@string/back" />
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
列表的内容的XML：
XML of list's elements:
<?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="wrap_content"
android:orientation="horizontal" >
<TableLayout
android:id="@+id/blocCheck"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="25px"
android:layout_marginTop="25px"
android:background="@color/black" >
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:baselineAligned="true"
android:paddingLeft="4sp" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_weight="1"
android:orientation="horizontal"
android:paddingLeft="20sp" >
<ImageView
android:id="@+id/iv_cat"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/category"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="left"
android:layout_marginLeft="15dip"
android:text="tfgldkjhglf"
android:textSize="20sp" />
</LinearLayout>
<CheckBox
android:id="@+id/check_cat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginRight="10sp"
android:onClick="MyHandler" />
</TableRow>
</TableLayout>
</LinearLayout>
我在我看来设置适配器：
I set adapter in my view :
list = getListView();
list.setAdapter(new CatAdapter(this, listCat));
我的适配器：
My adapter:
public class CatAdapter extends BaseAdapter {
private LayoutInflater mInflater;
private List<CatAdapterObject> mListAppInfo;
private Context mContext;
/**
* Constructor
* @param context
* @param data
* @param resource
* @param from
* @param to
*/
public CatAdapter (Context context, List<CatAdapterObject> list){
mContext = context;
mListAppInfo = list;
mInflater = LayoutInflater.from(mContext);
}
/**
* number of elements
*/
@Override
public int getCount() {
return mListAppInfo.size();
}
/**
* get an item in the list
*/
@Override
public Object getItem (int position){
return mListAppInfo.get(position).getId();
}
/**
* get id of the selected item
*/
@Override
public long getItemId(int position) {
return mListAppInfo.get(position).getId();
}
/**
* get the view
*/
@Override
public View getView (int position, View convertView, ViewGroup parent){
LinearLayout layoutItem;
if (convertView == null) {
layoutItem = (LinearLayout) mInflater.inflate(R.layout.category, parent, false);
} else {
layoutItem = (LinearLayout) convertView;
}
// get the current category
CatAdapterObject entry = mListAppInfo.get(position);
//view setting
TextView category = (TextView) layoutItem.findViewById(R.id.category);
CheckBox cb = (CheckBox) layoutItem.findViewById(R.id.check_cat);
ImageView iv_cat = (ImageView) layoutItem.findViewById(R.id.iv_cat);
//elements setting
category.setText(entry.getName());
//checkbox
cb.setChecked(entry.isChecked());
cb.setTag(position);
//picture
Bitmap icon = Utils.getResizedBitmap(BitmapFactory.decodeResource(mContext.getResources(),entry.getPict()),45,45,true);
iv_cat.setImageBitmap(icon);
return layoutItem;
}
}
在活动lauched，完美显示的列表。我可以/下没有任何问题向上滚动。但是，当我检查的复选框中的一个，然后向下滚动，箱这是最好的宽松的对勾，并在列表中最新的框的背景颜色改变。
When activity is lauched, list is displayed perfectly. I can scroll up/down without any problem. However, when I check one of the checkboxes and scroll down, box which was checked "loose" its check mark and the background color of the latest box in the list changed.
当检查中，下面的方法被调用（在我的活动文件）：
When checking a box, below method is called (In my activity file):
public void MyHandler(View v) {
//クリックされたcheckbox
cb = (CheckBox) v;
Log.d("CHECKBOX","before :"+Utils.implode(",",this.cat_id_list));
//get position in the list
Integer position = Integer.parseInt(cb.getTag().toString());
//instance of the view (list's child)
View o = list.getChildAt(position).findViewById(R.id.blocCheck);
// check if box is checked
if (cb.isChecked()) {
o.setBackgroundResource(R.color.pink);
this.cat_id_list.add(position.toString());
// 背景色を替え、リストから削除
} else {
o.setBackgroundResource(R.color.black);
Collections.sort(this.cat_id_list);
int index = Collections.binarySearch(this.cat_id_list,position.toString());
this.cat_id_list.remove(index);
}
Log.d("CHECKBOX","after :"+Utils.implode(",",this.cat_id_list));
}
有我的列表中8种元素，但是当我检查mChildrenCount列表中，只有5元。
There are 8 elements in my list but when I check the "mChildrenCount" of the list, there are only 5 elements.
我只是想保存的元素至极的this.cat_id_list标识进行了检查，并更改所选项目的背景色。
I just want to save in the "this.cat_id_list" id of elements wich were checked and change background color of selected item.
我会AP preciate您的帮助！
I would appreciate your help !
推荐答案
在你的getView你要这样的事情（这code是给你一个想法将如何工作在你的情况）：
In your getView you have to something like this (this code is give you an idea how it will work in your case):
ListView lv = ((ListActivity)context).getListView();
// Containing all check states
SparseBooleanArray sba = lv.getCheckedItemPositions();
CheckBox cb = (CheckBox) convertView.findViewById(R.id.yourcheckbox);
cb.setChecked(false);
if(sba != null)
if(sba.get(position))
cb.setChecked(true);
这是说这就是你需要在活动方。
That said this what you need on the Activity side.
您必须让你的ListView到多选择模式由机器人：XML或使用setChoiceMode choiceMode。你复选框应该不点击的，不能成为焦点。
You have make your ListView to multi-selection mode by android:choiceMode in xml or using setChoiceMode. You check box should be non-clickable and non-focusable.
您必须删除您的onClick监听器上的按钮。无论你在按钮的onClick做，你必须是逻辑添加到ListActivtiy的onListItemClick。
You have to remove your onClick listener on buttons. Whatever you doing in onClick of button, you have to add that logic to the onListItemClick of ListActivtiy.
