我一直在使用ListView，每个项目都是{/ 1}}，如
我无法检查CheckableLinearLayout中的任何行，它甚至没有在UI中注册检查。我认为ListView不存在android:checkMark。将CheckableLinearLayout嵌套到我的CheckedTextView中是否正确，如果我使用CheckableLinearLayout代替它会更好。另外，如何在检查后将它们放在CheckBox中，而不是以这种方式迭代它们。
这是我的布局：
ArrayList我已经实现了listActivity，如下所示：
<com.example.deltest.CheckableLinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<CheckedTextView
android:id="@android:id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
/>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txt_a"
/>
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txt_b"
/>
</com.example.deltest.CheckableLinearLayout>
编辑尝试通过扩展SimpleCursorAdapter解决问题的不同方法：
public class DeleteList extends ListActivity
{
ArrayList<Integer> idList=new ArrayList<Integer>();
Cursor c;
Handler handler;
static final int WHAT=0;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
final TumblrDB db=new TumblrDB(this);
c=db.query();
startManagingCursor(c);
handler=new Handler();
View v=getLayoutInflater().inflate(R.layout.layout_header, null,false);
getListView().addHeaderView(v);
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
SimpleCursorAdapter adapter=new SimpleCursorAdapter(this,R.layout.layout_del,c,new String[] {TumblrDB.DATE,TumblrDB.DESC},new int[]{R.id.txt_a,R.id.txt_b});
getListView().setAdapter(adapter);
if(handler.hasMessages(WHAT))
{
c=db.query();
((SimpleCursorAdapter)getListView().getAdapter()).swapCursor(c);
}
Button btn_del=(Button)v.findViewById(R.id.btn_del);
btn_del.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
int count=getListView().getCount();
SparseBooleanArray sparseBooleanArray=getListView().getCheckedItemPositions();
for(int i=0;i<count;i++)
{
if(sparseBooleanArray.get(i))
{
c.moveToPosition(i);
int _id=c.getInt(c.getColumnIndex(TumblrDB._ID));
Log.d("DeleteList", "The id has been added "+_id);
idList.add(_id);
new Thread()
{
public void run()
{
for(int i:idList)
{
db.delete(i);
Log.d("DeleteList", "The id has been deleted "+i);
handler.sendEmptyMessage(WHAT);
}
}
}.start();
}
}
}
});
}
}
然后我为CheckBox实现了一个OnClickListener：
if(row==null)
{
row=inflater.inflate(layout, null, false);
holder=new ViewHolder(row,position);
row.setTag(holder);
holder.check_del.setTag(position);
}
else
{
holder=(ViewHolder)row.getTag();
holder.check_del.setOnClickListener(null);
holder.check_del.setTag(position);
if(hitList.get(position))
holder.check_del.setChecked(true);
else
holder.check_del.setChecked(false);
}
现在，当我尝试访问我正在使用的ArrayList时，它会抛出一个ArrayOutOfBoundsException：
OnClickListener cbl=new OnClickListener(){
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
int position=(Integer)view.getTag();
Log.d("CustomCursorAdapter", "The checkbox at postion "+position+" has been clicked");
if(((CheckBox)view).isChecked())
{
hitList.set(position, true);
}
else
{
hitList.set(position, false);
}
}
};
答案 0 :(得分：1)
使用ArrayList存储列表中所有复选框的状态。
public static ArrayList<Boolean> hitList;
我已初始化并将所有值设置为false：
hitList=new ArrayList<Boolean>();
for(int i=0;i<this.getCount();i++)
{
hitList.add(i, false);
}
当初始化View的复选框时，它按位置查找数组并仅在ArrayList中的值为true时检查它。位置由CheckBox使用它的setTag方法保存并在Listener中检索以确定已选中的复选框的位置。
@Override
public View getView(int position,View convertView,ViewGroup parent)
{
View row=convertView;
ViewHolder holder;
if(row==null)
{
row=inflater.inflate(layout, null, false);
holder=new ViewHolder(row);
row.setTag(holder);
holder.check_del.setTag(position);
}
else
{
holder=(ViewHolder)row.getTag();
holder.check_del.setOnClickListener(null);
holder.check_del.setTag(position);
if(hitList.get(position))
holder.check_del.setChecked(true);
else
holder.check_del.setChecked(false);
}
c.moveToPosition(position);
holder.txt_a.setText(c.getString(c.getColumnIndex(ItemDB.TITLE)));
holder.txt_b.setText(c.getString(c.getColumnIndex(ItemDB.DESCRIPTION)));
OnClickListener cbl=new OnClickListener(){
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
int position=(Integer)view.getTag();
Log.d("CustomCursorAdapter", "The checkbox at postion "+position+" has been clicked");
if(((CheckBox)view).isChecked())
{
hitList.set(position, true);
}
else
{
hitList.set(position, false);
}
}
};
holder.check_del.setOnClickListener(cbl);
return row;
}
static class ViewHolder
{
TextView txt_a;
TextView txt_b;
CheckBox check_del;
ViewHolder(View row)
{
txt_a=(TextView)row.findViewById(R.id.txt_a);
txt_b=(TextView)row.findViewById(R.id.txt_b);
check_del=(CheckBox)row.findViewById(R.id.check_del);
}
}
目前，我在ListView中有一个标题，其中包含以下onClickListener：
@SuppressWarnings("deprecation")
@Override
public void onClick(View view) {
// TODO Auto-generated method stub
ArrayList<Boolean> killList=CustomCursorAdapter.hitList;
int totalDeleted=0;
for(int i=0;i<killList.size();i++)
{
//Log.d(TAG,i+":"+killList.get(i));
c.moveToPosition(i);
String title=c.getString(c.getColumnIndex(ItemDB.TITLE));
int _id=c.getInt(c.getColumnIndex(ItemDB._ID));
//Log.d(TAG, "Item has title "+title+" and id "+_id );
int rowsAffected=0;
if(killList.get(i))
{
rowsAffected=db.delete(_id);
//Log.d(TAG, "Deleted row with id "+_id);
killList.set(i, false);
}
totalDeleted+=rowsAffected;
}
//Log.d(TAG, "The total number of rows deleted "+totalDeleted);
//if(c.requery())
//{
//Log.d(TAG, "Requerying data,this calls notifyDataSetChanged");
//}
}});
一旦你在Cursor上调用requery之前已经从行中删除了数据（不推荐使用它...需要找到更好的选择），必须重置ArrayList中的值。