Checkbox unchecked when I scroll listview on Android
In the custom listview adapter call setChecked after calling setOnCheckedChangeListener.
This way you sever the link to the old listener from the recycled view.
You can use the following adapter code to run a checkbox perfectly in a ListView.
A detailed demo is here: Listview With Checkbox Android
See the detailed demo link for deep information. It also shows how to send checked information to the next activity.
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
public class CustomAdapter extends BaseAdapter {
private Context context;
public static ArrayList<Model> modelArrayList;
public CustomAdapter(Context context, ArrayList<Model> modelArrayList) {
this.context = context;
this.modelArrayList = modelArrayList;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public int getCount() {
return modelArrayList.size();
}
@Override
public Object getItem(int position) {
return modelArrayList.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder(); LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.lv_item, null, true);
holder.checkBox = (CheckBox) convertView.findViewById(R.id.cb);
holder.tvAnimal = (TextView) convertView.findViewById(R.id.animal);
convertView.setTag(holder);
}
else {
// The getTag returns the viewHolder object set as a tag to the view
holder = (ViewHolder)convertView.getTag();
}
holder.checkBox.setText("Checkbox " + position);
holder.tvAnimal.setText(modelArrayList.get(position).getAnimal());
holder.checkBox.setChecked(modelArrayList.get(position).getSelected());
holder.checkBox.setTag(R.integer.btnplusview, convertView);
holder.checkBox.setTag( position);
holder.checkBox.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
View tempview = (View) holder.checkBox.getTag(R.integer.btnplusview);
TextView tv = (TextView) tempview.findViewById(R.id.animal);
Integer pos = (Integer) holder.checkBox.getTag();
Toast.makeText(context, "Checkbox " + pos + " clicked!", Toast.LENGTH_SHORT).show();
if (modelArrayList.get(pos).getSelected()){
modelArrayList.get(pos).setSelected(false);
}
else {
modelArrayList.get(pos).setSelected(true);
}
}
});
return convertView;
}
private class ViewHolder {
protected CheckBox checkBox;
private TextView tvAnimal;
}
}
Model
is
public class Model {
private boolean isSelected;
private String animal;
public String getAnimal() {
return animal;
}
public void setAnimal(String animal) {
this.animal = animal;
}
public boolean getSelected() {
return isSelected;
}
public void setSelected(boolean selected) {
isSelected = selected;
}
}
In your getView()
you have the following line
holder.cbox.setChecked(false);
which sets CheckBox unchecked every time getView()
is called (when you scroll your list, for example)
Blockquote
**In Side getView() Method just call like this>>
check.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton arg0, boolean arg1)
{
if(check.isChecked())
{
//checked
chkArray[position]=true;
}
else
{ //uncheck
chkArray[position]=false;
}
}
});
//check condition for checkboxes
if(chkArray.length>0)
{
for (int i = 0; i < chkArray.length; i++)
{
if(chkArray[position]!=null && chkArray[position])
{
check.setChecked(true);
}
}
}