Android 如何在CustomListview中正确使用复选框
我有一个带有[PICTURE]-[TEXT]-[CHECKBOX]的自定义列表视图 当我选中一个复选框并向下滚动时,会选择更多复选框。 为什么会这样?我如何解决这个问题 ->我只选择一个复选框 ->然后我向下看,选择了更多复选框 顺致敬意, MSeiz5 我的自定义适配器_Android 如何在CustomListview中正确使用复选框,android,checkbox,android-listview,Android,Checkbox,Android Listview,我有一个带有[PICTURE]-[TEXT]-[CHECKBOX]的自定义列表视图 当我选中一个复选框并向下滚动时,会选择更多复选框。 为什么会这样?我如何解决这个问题 ->我只选择一个复选框 ->然后我向下看,选择了更多复选框 顺致敬意, MSeiz5 我的自定义适配器_ public class CustomAdapter extends BaseAdapter{ TextView rawTextView; boolean[] checkB
public class CustomAdapter extends BaseAdapter{
TextView rawTextView;
boolean[] checkBoxState;
LayoutInflater mInflater;
ListContent holder;
private ArrayList<Notification> arrNotification=null;
private ArrayList<HashMap<String, String>> arrlist = new ArrayList<HashMap<String, String>>();
public CustomAdapter(ArrayList<HashMap<String, String>> arrlist) {
arrNotification = new ArrayList<Notification>();
mInflater = LayoutInflater.from(connected_upload.this);
checkBoxState=new boolean[arrNotification.size()];
this.arrlist = arrlist;
}
@Override
public int getCount() {
return arrlist.size();
}
public int getCount2()
{
return arrNotification.size();
}
public Object getItem2(int position)
{
return position;
}
public long getItemId2(int position)
{
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = mInflater.inflate(R.layout.connected_upload, null);
holder=new ListContent();
holder.checkbox = (CheckBox) convertView.findViewById( R.id.checkBox1 );
convertView.setTag(holder);
if(convertView == null){
// LayoutInflater class is used to instantiate layout XML file into its corresponding View objects.
LayoutInflater layoutInflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
convertView = layoutInflater.inflate(R.layout.connected_upload_row, null);
holder=new ListContent();
holder.checkbox = (CheckBox) convertView.findViewById( R.id.checkBox1 );
convertView.setTag(holder);
}
// R.id.img_list, R.id.string_cell
maptemp=new HashMap<String, String>();
maptemp=arrlist.get(position);
rawTextView = (TextView) convertView.findViewById(R.id.string_cell);
rawTextView.setText(maptemp.get("string_cell"));
if (isfolder == true){
imgview=(ImageView) convertView.findViewById(R.id.img_list);
imgview.setImageResource(R.drawable.folder);
} else {
Bitmap test = getbitpam(maptemp.get("img_list"));
imgview=(ImageView) convertView.findViewById(R.id.img_list);
imgview.setImageBitmap(test);
System.gc();
}
return convertView;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
}
试试这个。。这可能对你有帮助
mList.setAdapter(new ArrayAdapter<String>
(mSplitActivity,android.R.layout.simple_list_item_multiple_choice, mStrings));
mList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
mList.setAdapter(新阵列适配器
(mSplitActivity,android.R.layout.simple_list_item_multiple_selection,mStrings));
mList.setChoiceMode(ListView.CHOICE\u MODE\u MULTIPLE);
也试试这个
尝试设置复选框的标记,并在设置复选框的值时选中标记。ListView中的复选框存在的问题是,由于ListView的循环使用,视图被循环使用,并且复选框(选中或取消选中)的值没有保持。要保持复选框的状态,必须有一些东西可以存储复选框的状态 参考这个,它已经很好地解释了这个例子
public class ListViewAdapter extends BaseAdapter
{
private boolean[] checkBoxState;
private LayoutInflater mInflater;
private ListContent holder;
private ArrayList<Notification> arrNotification=null;
public ListViewAdapter(Context context,ArrayList<Notification> notify)
{
arrNotification = new ArrayList<Notification>();
mInflater = LayoutInflater.from(context);
checkBoxState=new boolean[arrNotification.size()];
imageLoader=new ImageLoader(NotificationListActivity.this.getApplicationContext());
}
public int getCount()
{
return arrNotification.size();
}
public Object getItem(int position)
{
return position;
}
public long getItemId(int position)
{
return position;
}
public View getView(final int position, View convertView, ViewGroup parent)
{
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.noti_list, null);
holder=new ListContent();
holder.entity_type = (TextView) convertView.findViewById(R.id.entityname_textview);
holder.noti_thumb = (ImageView) convertView.findViewById(R.id.img_noti_thumb);
holder.checkbox = (CheckBox) convertView.findViewById( R.id.CheckBox01 );
convertView.setTag(holder);
}
else
{
holder = (ListContent)convertView.getTag();
}
holder.noti_thumb.setTag(arrNotification.get(position).thumbnail);
imageLoader.DisplayImage(arrNotification.get(position).thumbnail,NotificationListActivity.this, holder.noti_thumb);
holder.checkbox.setChecked(checkBoxState[position]);
holder.checkbox.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
if (((CheckBox) v).isChecked())
{
checkBoxState[position]=true;
}
else
{
checkBoxState[position]=false;
}
}
});
holder.checkbox.setTag(position);
return convertView;
}
}
class ListContent
{
TextView entity_type;
TextView content_type;
ImageView noti_thumb;
CheckBox checkbox;
}
公共类ListViewAdapter扩展了BaseAdapter
{
私有布尔[]checkBoxState;
私人停车场;
私有内容持有者;
私有ArrayList arrNotification=null;
公共ListViewAdapter(上下文,ArrayList notify)
{
arrNotification=newarraylist();
mInflater=LayoutInflater.from(上下文);
checkBoxState=新布尔值[arrNotification.size()];
imageLoader=新的imageLoader(NotificationListActivity.this.getApplicationContext());
}
public int getCount()
{
返回arrNotification.size();
}
公共对象getItem(int位置)
{
返回位置;
}
公共长getItemId(int位置)
{
返回位置;
}
公共视图getView(最终整数位置、视图转换视图、视图组父视图)
{
if(convertView==null)
{
convertView=mInflater.充气(R.layout.noti_列表,空);
holder=新的ListContent();
holder.entity_type=(TextView)convertView.findViewById(R.id.entityname_TextView);
holder.noti_thumb=(ImageView)convertView.findViewById(R.id.img_noti_thumb);
holder.checkbox=(checkbox)convertView.findViewById(R.id.CheckBox01);
convertView.setTag(支架);
}
其他的
{
holder=(ListContent)convertView.getTag();
}
holder.noti_thumb.setTag(arrNotification.get(position.缩略图));
imageLoader.DisplayImage(arrNotification.get(position).缩略图,NotificationListActivity.this,holder.noti_thumb);
holder.checkbox.setChecked(checkbox状态[位置]);
setOnClickListener(新的OnClickListener()
{
公共void onClick(视图v)
{
如果(((复选框)v).isChecked())
{
checkBoxState[位置]=真;
}
其他的
{
checkBoxState[位置]=假;
}
}
});
holder.checkbox.setTag(位置);
返回视图;
}
}
类列表内容
{
文本视图实体类型;
文本视图内容类型;
ImageView非拇指;
复选框;
}
我也有同样的问题
我所做的:
在我的对象中,我放置并boolean id_selected
,在我的CustomAdapter中,我检查对象是否被选中(然后我检查checbox),在getView
中,我禁用复选框clickable,在convertview
中,单击我反转id_selected
并刷新复选框。当用户在复选框或行中单击时,他们会选中或取消选中复选框,并可以执行您想要的操作
以下是一个例子:
final T t = getItem(position);
if (convertView == null) {
convertView = inflater.inflate(resourceId, parent, false);
}
final View vv = convertView;
convertView.setClickable(true);
convertView.setFocusable(true);
convertView.setBackgroundResource(R.drawable.listview_background);
TextView tv_ds_lista = (TextView) convertView.findViewById(R.id.ds_lista);
final CheckBox chkbx_id_selecionado = (CheckBox) convertView.findViewById(R.id.id_selecionado);
chkbx_id_selecionado.setClickable(false);
convertView.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
chkbx_id_selecionado.setChecked(!chkbx_id_selecionado.isChecked());
t.setId_selecionado(chkbx_id_selecionado.isChecked());
}
});
tv_ds_lista.setText(t.toString());
return convertView;
我修改了我的一些课程,但本质是在那里。。。在我最初的类中,我使用反射和其他特定方法;
List<String> recIdArr = new ArrayList<String>();
List<String> selectedIds = new ArrayList<String>();
List<String> reportslist;
public View getView(final int position, final View convertView, ViewGroup parent)
{
View row = super.getView(position, convertView, parent);
CheckBox cBox=(CheckBox)row.findViewById(R.id.cb1);
if(cBox.isChecked())
{
selectedIds.add(recIdArr.get(reportslistview.getPositionForView(cBox)));
}
else
{
selectedIds.remove(recIdArr.get(reportslistview.getPositionForView(cBox)));
}
}
List selectedIds=new ArrayList();
列表报告列表;
公共视图getView(最终整型位置、最终视图转换视图、视图组父视图)
{
视图行=super.getView(位置、转换视图、父级);
复选框cBox=(复选框)row.findViewById(R.id.cb1);
if(cBox.isChecked())
{
选择edids.add(recIdArr.get(reportslistview.getPositionForView(cBox));
}
其他的
{
选择edids.remove(recIdArr.get(reportslistview.getPositionForView(cBox));
}
}
必须使用自定义适配器存储项的状态,如以下示例所示:
public class MyAdapter extends ArrayAdapter<MyClass> {
// MyClass has a field named 'selected'
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView;
final MyClass item = getItem(position);
if (convertView == null) {
LayoutInflater inflator = (LayoutInflater) getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rowView = inflator.inflate(rsc, null);
} else {
rowView = (View) convertView;
}
//...
CheckBox chkSelected = (CheckBox) rowView
.findViewById(R.id.chkSelected);
chkSelected.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
item.selected = isChecked;
}
});
chkSelected.setChecked(item.selected);
//...
}
}
公共类MyAdapter扩展了ArrayAdapter{
//MyClass有一个名为“selected”的字段
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
视图行视图;
最终MyClass项目=getItem(位置);
if(convertView==null){
LayoutFlater充气器=(LayoutFlater)getContext()
.getSystemService(上下文布局\充气机\服务);
rowView=充气机充气(rsc,空);
}否则{
rowView=(视图)convertView;
}
//...
复选框chkSelected=(复选框)行视图
.findviewbyd(R.id.chkSelected);
setOnCheckedChangeListener(新的OnCheckedChangeListener(){
@凌驾
检查更改后的公共无效(复合按钮视图,
布尔
public class MyAdapter extends ArrayAdapter<MyClass> {
// MyClass has a field named 'selected'
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView;
final MyClass item = getItem(position);
if (convertView == null) {
LayoutInflater inflator = (LayoutInflater) getContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
rowView = inflator.inflate(rsc, null);
} else {
rowView = (View) convertView;
}
//...
CheckBox chkSelected = (CheckBox) rowView
.findViewById(R.id.chkSelected);
chkSelected.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
item.selected = isChecked;
}
});
chkSelected.setChecked(item.selected);
//...
}
}