*> I tried doing custom base adapter but have a small problem. when i
> check checkbox row scroll down some other check box is checked.
*
That is probably because you are using the convertView parameter that is
passed to the getView() method (which is a good thing!)... What is
happening is that you are reusing views when you scroll to avoid the cost of
creating a new one unnecessarily every time. This also means that you will
be inheriting the checked state of a checkbox because you are reusing a view
but not changing the checked state.
What I do to solve this problem is come up with some sort of mechanism
(usually a map or ArrayList of some sort) that I can use to tell me if a
particular view is supposed to be checked or not, and I explicitly set the
state of the checkbox in the getView method...
Hope that helps,
Justin
----------------------------------------------------------------------
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On Tue, May 11, 2010 at 12:58 AM, skalluraya <skallur...@gmail.com> wrote:
> I tried doing custom base adapter but have a small problem. when i
> check checkbox row scroll down some other check box is checked.
>
> The code for that is following:
>
> package com.testing;
>
> import java.io.IOException;
> import java.util.ArrayList;
> import android.content.Context;
> import android.graphics.BitmapFactory;
> import android.view.LayoutInflater;
> import android.view.View;
> import android.view.ViewGroup;
> import android.view.View.OnClickListener;
> import android.widget.BaseAdapter;
> import android.widget.CheckBox;
> import android.widget.CompoundButton;
> import android.widget.ImageView;
> import android.widget.LinearLayout;
> import android.widget.TextView;
> import android.widget.CompoundButton.OnCheckedChangeListener;
>
>
> package com.virtualprogramming;
>
> import java.io.IOException;
> import java.util.ArrayList;
> import android.content.Context;
> import android.graphics.BitmapFactory;
> import android.view.LayoutInflater;
> import android.view.View;
> import android.view.ViewGroup;
> import android.view.View.OnClickListener;
> import android.widget.BaseAdapter;
> import android.widget.CheckBox;
> import android.widget.CompoundButton;
> import android.widget.ImageView;
> import android.widget.LinearLayout;
> import android.widget.TextView;
> import android.widget.CompoundButton.OnCheckedChangeListener;
>
>
> public class QuickIDDialogAdapter extends BaseAdapter
> {
>
> private Context mContext;
> private final LayoutInflater mInflater;
> private String[] mFeildsList;
> private String mAssetFolderName;
> private boolean[] mbCheckedStatus;
> private ArrayList<String> mListData;
>
>
> public QuickIDDialogAdapter(Context context,ArrayList<String>
> inListData, String inAssetFolderName, boolean[] inCheckedStatus)
> {
> mInflater = LayoutInflater.from(context);
> mContext = context;
> mAssetFolderName = inAssetFolderName;
> mbCheckedStatus = inCheckedStatus;
> mListData = inListData;
> }
>
>
> @Override
> public int getCount()
> {
> // TODO Auto-generated method stub
> return mListData.size();
> }
>
> /**
> * Since the data comes from an array, just returning the index is
> sufficent
> * to get at the data. If we were using a more complex data
> structure, we
> * would return whatever object represents one row in the list.
> *
> * @see android.widget.ListAdapter#getItem(int)
> */
> public Object getItem(int position)
> {
> return position;
> }
>
> /**
> * Use the array index as a unique id.
> *
> * @see android.widget.ListAdapter#getItemId(int)
> */
> public long getItemId(int position)
> {
> return position;
> }
>
> /**
> * Make a view to hold each row.
> *
> * @see android.widget.ListAdapter#getView(int, android.view.View,
> * android.view.ViewGroup)
> */
> public View getView(int position, View convertView, ViewGroup
> parent)
> {
> // A ViewHolder keeps references to children views to avoid
> unneccessary calls
> // to findViewById() on each row.
> ViewHolder holder;
>
> // When convertView is not null, we can reuse it directly,
> there is
> no need
> // to reinflate it. We only inflate a new View when the
> convertView
> supplied
> // by ListView is null.
> if (convertView == null)
> {
> convertView =
> mInflater.inflate(R.layout.dialoglistrow, null);
> // Creates a ViewHolder and store references to the
> two children
> views
> // we want to bind data to.
>
> holder = new ViewHolder();
>
>
> holder.filterCheckBox = (CheckBox)
> convertView.findViewById(R.id.dialogrowcheckbox);
> holder.filterCheckBox.setOnClickListener(new
> CheckBoxClickListener(position));
>
> holder.filterName = (TextView)
> convertView.findViewById(R.id.dialogrowname);
> holder.filterIcon = (ImageView)
> convertView.findViewById(R.id.dialogrowimage);
> convertView.setTag(holder);
> }
> else
> {
> // Get the ViewHolder back to get fast access to the
> TextView
> // and the ImageView.
> holder = (ViewHolder) convertView.getTag();
> }
>
> String filterName = mListData.get(position);
> // Bind the data efficiently with the holder.
> holder.filterName.setText(filterName);
> holder.filterCheckBox.setChecked(mbCheckedStatus[position]);
> try
> {
>
>
> holder.filterIcon.setImageBitmap(BitmapFactory.decodeStream(mContext.getAssets().open(mAssetFolderName
> +"/"+filterName+ ".png")));
> }
> catch (IOException e)
> {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
> return convertView;
> }
>
> static class ViewHolder
> {
> TextView filterName;
> ImageView filterIcon;
> CheckBox filterCheckBox;
> boolean filterChecked=false;
> @Override
> public String toString()
> {
> // TODO Auto-generated method stub
> return ""+filterName.getText()+"--"+filterChecked;
> }
> }
>
>
> class CheckBoxClickListener implements OnClickListener
> {
> int miPosition = 0;
> public CheckBoxClickListener(int position)
> {
> // TODO Auto-generated constructor stub
> miPosition = position;
> }
>
>
> @Override
> public void onClick(View v)
> {
> // TODO Auto-generated method stub
> System.out.println(mbCheckedStatus[miPosition]+"
> miPosition:"+miPosition);
> // TODO Auto-generated method stub
> if(mbCheckedStatus[(int)getItemId(miPosition)])
> {
> mbCheckedStatus[(int)getItemId(miPosition)]
> = false;
> }
> else
> {
> mbCheckedStatus[(int)getItemId(miPosition)]
> = true;
> }
> }
>
> }
> }
>
>
>
>
> On May 10, 6:22 pm, TreKing <treking...@gmail.com> wrote:
> > On Mon, May 10, 2010 at 2:18 AM, skalluraya <skallur...@gmail.com>
> wrote:
> > > How can i go about it.
> >
> > Try setting a custom adapter on the listview in the dialog.
> >
> >
> -------------------------------------------------------------------------------------------------
> > TreKing - Chicago transit tracking app for Android-powered deviceshttp://
> sites.google.com/site/rezmobileapps/treking
> >
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