in gridview checkbox is unchecked while scrolling gridview up and down

Question

I have a GridView and I have put a checkbox and imageview. The problem is that when I check this checkbox and scroll down, the checBox gets unchecked. Though the uncheck ev

Answer 1

https://groups.google.com/forum/?fromgroups#!topic/android-developers/No0LrgJ6q2M

Drawing from romain guy's solution of listview in the above link.

Your Custom Adapter must implement CompoundButton.OnCheckedChangeListener and use a SparseBooleanArray

Then

 holder.chckbx.setOnCheckedChangeListener(this);

Then

     public boolean isChecked(int position) {
        return mCheckStates.get(position, false);
    }

    public void setChecked(int position, boolean isChecked) {
        mCheckStates.put(position, isChecked);

    }

    public void toggle(int position) {
        setChecked(position, !isChecked(position));
    }
@Override
public void onCheckedChanged(CompoundButton buttonView,
        boolean isChecked) {
     mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

}

Example

public class MainActivity extends Activity implements
AdapterView.OnItemClickListener {
    int count;
private CheckBoxAdapter mCheckBoxAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    final GridView gridView = (GridView) findViewById(R.id.lv);
    gridView.setTextFilterEnabled(true);
    gridView.setOnItemClickListener(this);
    mCheckBoxAdapter = new CheckBoxAdapter(this);
           gridView.setAdapter(mCheckBoxAdapter);

   }

public void onItemClick(AdapterView parent, View view, int
position, long id) {
    mCheckBoxAdapter.toggle(position);
}

class CheckBoxAdapter extends ArrayAdapter implements CompoundButton.OnCheckedChangeListener
{  private SparseBooleanArray mCheckStates;
   LayoutInflater mInflater;
    ImageView imageview1,imageview;
    CheckBox cb;

    CheckBoxAdapter(MainActivity context)
    {
        super(context,0);
        mCheckStates = new SparseBooleanArray(10);
        mInflater = (LayoutInflater)MainActivity.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }
    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        return 10;
    }

    @Override
    public Object getItem(int position) {
        // TODO Auto-generated method stub
        return position;
    }

    @Override
    public long getItemId(int position) {
        // TODO Auto-generated method stub

        return 0;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        // TODO Auto-generated method stub
        View vi=convertView;
        if(convertView==null)
         vi = mInflater.inflate(R.layout.checkbox, null); 
         imageview= (ImageView) vi.findViewById(R.id.textView1);

         cb = (CheckBox) vi.findViewById(R.id.checkBox1);

         cb.setTag(position);
         cb.setChecked(mCheckStates.get(position, false));
        cb.setOnCheckedChangeListener(this);
        return vi;
    }
     public boolean isChecked(int position) {
            return mCheckStates.get(position, false);
        }

        public void setChecked(int position, boolean isChecked) {
            mCheckStates.put(position, isChecked);

        }

        public void toggle(int position) {
            setChecked(position, !isChecked(position));
        }
    @Override
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        // TODO Auto-generated method stub
         mCheckStates.put((Integer) buttonView.getTag(), isChecked);    

    }

}

}

activity_main.xml

checkbox.xml

Similar to the one answered here. Instead of listview use gridview.

How to change the text of a CheckBox in listview?