[android-developers] Integrate ImageButton with ListActivity failed - List no longer selectable.

[qmwestview]

Hi,

I have a working ListActivity class. Each of the list item consists of
an ImageView and a TextView.

However, when I try to replace the ImageView with ImageButton, The
list becomes unselectable. The onListItemClick or any other function
no longer get called when press a list item (Although the track ball
can still focus a list item, but nothing more can be done).

I have searched the forum and also the internet and failed to find any
such working example, apart from one guy reporting a similar problem
but with no answer.

The following is my code:

1.      The list_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/
android"
    android:layout_width="fill_parent"
    android:layout_height="?android:attr/listPreferredItemHeight">

    <ImageButton
        android:id="@+id/refresh"

        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:src="@drawable/refresh" />
    <TextView
        android:id="@+id/title"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
                android:layout_toRightOf="@id/refresh"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:singleLine="true"/>
</RelativeLayout>

2.      the Main ListActivity class:

import android.app.Dialog;
import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class TestListActivity extends ListActivity implements
Constants {


        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setListAdapter(new EfficientAdapter(this));
        }

        @Override
        protected void onListItemClick(ListView l, View v, int index, long
id) {
                Log.i("", "onListitemClick");
        }

        public boolean onContextItemSelected(MenuItem item) {
                Log.i("", "onContextItemSelected");
                return false;
        }

        private class EfficientAdapter extends BaseAdapter implements
Constants {
                private LayoutInflater layoutInflater;

                Context ctx;
                public EfficientAdapter(Context context) {
                        // Cache the LayoutInflate to avoid asking for a new 
one each time.
                        layoutInflater = LayoutInflater.from(context);
                        ctx = context;
                }


                @Override
                public int getCount() {
                        Log.i("", "getCount");
                        return SIZE;
                }

                @Override
                public Object getItem(int position) {
                        Log.i("", "getItem");
                        return "TBD";           }

                @Override
                public long getItemId(int positin) {
                        Log.i("", "getItemId");
                        return positin;
                }

                public void update(int position) {
                        notifyDataSetChanged(); // triggers the view data to be 
refreshed!
                }

                /**
                 * Make a view to hold each list item
                 */
                @Override
                public View getView(int position, View convertView, ViewGroup
parent) {
                        Log.i("", "getView");
                        ViewHolder holder;
                        if (convertView == null) {
                                convertView = 
this.layoutInflater.inflate(R.layout.list_item,
parent, false);

                                holder = new ViewHolder();
                                holder.title = (TextView) 
convertView.findViewById(R.id.title);
                                convertView.setTag(holder);
                        } else {
                                holder = (ViewHolder) convertView.getTag();
                        }

                        holder.title.setText(R.string.title);
                        parent.focusableViewAvailable(convertView); // 
originally without
this. Added for testing, still not working!
                        return convertView;
                }

                private class ViewHolder {
                        //ImageButton imageButton;
                        TextView title;
                }
        }
}

Is there any way to make ListActivity working with ImageButton or this
actually can not be achieved (iPhone can this)?

Any help would be most appreciated.


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