android ListActivity displays icon instances

First, define each line in the list, not with the xml file, but with a class definition, CheckBox, ImageView, TextView and other controls added in the addView method.

//apk A list of 1 line 
class item_apk extends LinearLayout{

    public CheckBox chk_apk;
    public TextView txt_name;  
    public TextView txt_flag;
    public ImageView img_apk; 

    public item_apk(Context ctx, String item_name, String item_flag, Drawable item_draw)
    {

        super(ctx);
        this.setOrientation(HORIZONTAL);

        chk_apk = new CheckBox(ctx);
        addView(chk_apk,
                new LinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),60));     

        img_apk = new ImageView(ctx);
        img_apk.setImageDrawable(item_draw);
        addView(img_apk,
                new LinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),60));

        txt_name = new TextView(ctx);
        txt_name.setText(item_name);
        addView(txt_name,
                new LinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.4),60));

        txt_flag = new TextView(ctx);
        txt_flag.setText(item_flag);
        addView(txt_flag,
                new LinearLayout.LayoutParams((int)(MainActivity.wid_scr*0.2),60));

     }

}

Then, the definition list, again, is defined in 1 class, which is inherited from BaseAdapter.

// apk The list of 
class list_apk extends BaseAdapter{

     private Context ctx;
            private List<item_apk> list_data;

    public list_apk(Context context){

        ctx = context;
        list_data = new ArrayList<item_apk>();

    }

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

    @Override
    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return list_data.get(arg0);
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return list_data.indexOf(arg0);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        item_apk my_item; 

        if (convertView==null) 
        {  
            my_item = new item_apk(ctx,
                    (String)list_data.get(position).txt_name.getText(),
                    (String)list_data.get(position).txt_flag.getText(),
                    list_data.get(position).img_apk.getDrawable());  
        }
        else
        {  
            my_item = (item_apk)convertView;  
            my_item.txt_name = list_data.get(position).txt_name;  
            my_item.txt_flag = list_data.get(position).txt_flag; 
            my_item.img_apk = list_data.get(position).img_apk;  
        }  
        return my_item; 

    }

    public void addItem(String txt_name, String txt_flag, Drawable ico_apk)
    {  
        list_data.add(new item_apk(ctx,txt_name,txt_flag,ico_apk));                 
    }

}

Finally, the Activity class, where the Activity class onCreate(Bundle savedInstanceState) does not have the setContentView() method, but instead has the setListAdapter() method.

public class apk extends ListActivity{

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        list_apk list_ada =  new list_apk(this);

        //  A package manager 
        PackageManager pm = getPackageManager();
        // Get all the apps on your phone 
        List<PackageInfo> pi = pm.getInstalledPackages(0); 

        list_ada.addItem(" The application name ",
                " System application ", 
                null);  

        for (int i=0; i<pi.size(); i++){

            PackageInfo pii = (PackageInfo) pi.get(i);
            String is_sys;
            Drawable icon;

            if ((pii.applicationInfo.flags & pii.applicationInfo.FLAG_SYSTEM) <= 0)
                is_sys = " no ";
            else
                is_sys = " is ";

            if (pii.applicationInfo.loadIcon(pm)!=null)
                icon = (Drawable)pii.applicationInfo.loadIcon(pm);
            else
                icon = (Drawable) getResources().getDrawable(R.drawable.ic_launcher);

             
            list_ada.addItem(String.valueOf(pii.applicationInfo.loadLabel(pm)),
                    is_sys, 
                    icon);          

        }

        setListAdapter(list_ada);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

The entire Activity is made up of classes and does not use an xml layout file.
The effect is as follows.