Android: Do something when checkBox is checked

Question

I have created custom adapter and two layouts files the first layout is fragment view which contains ListView and Button

the second layout contains items which will be represented in the ListView

So

I want when the Checkbox is check make Button visible

All of these operations will be done in my custom adapter class

This is myCustom Adapter

Updated

public class LampControllerAdapter extends BaseAdapter {
Context mContext;
List<LampModel> mLampModels;
HashMap<Long,LampModel> selection;
Button sC;

  public LampControllerAdapter(Context context, ArrayList<LampModel> lampList) {

    mContext = context;
    mLampModels = lampList;
    selection = new HashMap<Long,LampModel>();
    LayoutInflater in = (LayoutInflater) LayoutInflater.from(context);

    View v = in.inflate(R.layout.fragment_home,null);
   sC = (Button)v.findViewById(R.id.selection_control);



}

@Override
public int getCount() {
    return mLampModels.size();
}

@Override
public Object getItem(int i) {
    return mLampModels.get(i);
}

@Override
public long getItemId(int i) {
    return 0;
}

@Override
public View getView(final int i, View view, ViewGroup parent) {

    ViewHolder holder;
    final LampModel model = (LampModel) getItem(i);
    if (view == null) {
        // Inflating The Layout
        LayoutInflater inflater = ((Activity) mContext).getLayoutInflater();
        view = inflater.inflate(R.layout.lamp_controller_item, parent, false);
        holder = new ViewHolder();

        holder.name = (TextView) view.findViewById(R.id.lamp_item_name);
        holder.description = (TextView) view.findViewById(R.id.lamp_item_description);
        holder.select = (CheckBox) view.findViewById(R.id.lamp_item_select);
        view.setTag(holder);

    } else {
        holder = (ViewHolder) view.getTag();
    }


    holder.name.setText(model.getName());
    holder.description.setText(model.getDescription());
    holder.select.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

            if(b){
                selection.put(model.getId(),model);
            }else {
                selection.remove(model.getId());
            }

            if(selection.size() > 0){
                Toast.makeText(mContext, "Not Empty", Toast.LENGTH_SHORT).show();
                sC.setVisibility(View.GONE);
            }else {
                Toast.makeText(mContext, "Empty", Toast.LENGTH_SHORT).show();
            }

        }
    });


    return view;
}


class ViewHolder {
    TextView name, description;
    CheckBox select;
    Switch aSwitch;
}

}

use interface for callback on `checkbox` `checkedListener` and make dynamic visibility — Jaydeep Devda, Jul 06 '17 at 09:55
possible duplicate of this: https://stackoverflow.com/questions/3149414/how-to-receive-a-event-on-android-checkbox-check-change — magicleon94, Jul 06 '17 at 09:58
@Ali Turki So there will be more than one CheckBox, each for a row of ListView. You've to keep count of all Selected CheckBox. So you could make visible Button as count>0 — Bills, Jul 06 '17 at 10:02
When i `setVisibility` on button doesn't work but when i `getText` it's work fine, do you have any idea @Bills — Ali Turki, Jul 06 '17 at 12:00
Your TextView will be in Activity and you want to change it from `LampControllerAdapter `. So, pass activity object in your adaptor in constructor and then set visibility after finding its id like `sC = (Button)activity.findViewById(R.id.selection_control);` — Bills, Jul 06 '17 at 12:18

score 2 · Answer 1 · answered Jul 06 '17 at 09:59

try this

CheckBox chkBox = ( CheckBox ) findViewById( R.id.chkBox );
chkBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
    {
        if ( isChecked )
        {
            // perform your action here
        }

    }
});

Android: Do something when checkBox is checked

1 Answers1