Question

I usually use this code to add item from datebase to list view:

public class ViewEvents extends Activity {

    DBAdapter DB=new DBAdapter(this);

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.viewevents);

        final ListView myListView = (ListView)findViewById(R.id.MyList);

          final ArrayList<String> todoItems = new ArrayList<String>();
          final ArrayAdapter<String>  aa = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, todoItems);

           DB.open();
         Cursor c=DB.select();
          c.moveToFirst();
          Integer n=new Integer(c.getCount());

        for(int i=0;i<c.getCount();i++)
        {
             todoItems.add(0, c.getString(0));
             c.moveToNext();
        }

            aa.notifyDataSetChanged();
            myListView.setAdapter(aa);
enter code here

but, in my project I added image to listview as here :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="5dp" >
 <RelativeLayout
        android:id="@+id/relativeLayout1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >
    <ImageView
        android:id="@+id/logo"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_alignParentTop="true"
            android:drawablePadding="0dip"
        android:src="@drawable/icon_remove" >
    </ImageView>

    <TextView
        android:id="@+id/label"
       android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentTop="true"
            android:layout_toLeftOf="@+id/logo"
        android:text="@+id/label"
        android:textSize="25px" >
    </TextView>
</RelativeLayout>
</LinearLayout>

That causes problem in arrayadapter, I can’t catch listview as usuall:

ListView myListView = (ListView)findViewById(R.id.MyList);

any advice please

the new code:

public class RemoveEvent extends ListActivity {

    DBAdapter DB=new DBAdapter(this);

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);



        final ArrayList<String> todoItems = new ArrayList<String>();
         final ArrayAdapter<String>  aa = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, todoItems);


         DB.open();
         Cursor c=DB.select();
          c.moveToFirst();
          Integer n=new Integer(c.getCount());
        for(int i=0;i<c.getCount();i++)
        {
             todoItems.add(0, c.getString(0));
             c.moveToNext();
        }


           // todoItems.add(0, c.getString(0));
            aa.notifyDataSetChanged();
            setListAdapter(new RemoveArrayAdapter(this, .......));

    }

    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {

        //get selected items
        String selectedValue = (String) getListAdapter().getItem(position);
        Toast.makeText(this, selectedValue, Toast.LENGTH_SHORT).show();

    }

}

removearrayadapter code:

public class RemoveArrayAdapter extends ArrayAdapter<String> {
    private final Context context;
    private final String[] values;

    public RemoveArrayAdapter(Context context, String[] values) {
        super(context, R.layout.removeevent, values);
        this.context = context;
        this.values = values;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) context
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.removeevent, parent, false);
        TextView textView = (TextView) rowView.findViewById(R.id.label);
        ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
        textView.setText(values[position]);

        return rowView;
    }
}

Answer 1

That causes problem in arrayadapter, I can’t catch listview as usuall:

What exactly does this means? What is the exception you get(if any)?

Some issues:

If you use android.R.layout.simple_list_item_1 then what is with the xml layout you posted?
If you plan to use that layout file then use this constructor of ArrayAdapter:

final ArrayAdapter<String>  aa = new ArrayAdapter<String>(this, R.layout.Name_of_layout_you_posted, R.id.label, todoItems);

Also if you plan to pass the Context:

 DBAdapter DB=new DBAdapter(this);

Then you should initialize the db in the onCreate method:

DBAdapter DB;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.viewevents);
    DB = new DBAdapter(this);
    //... rest of the code

Also, you should try to use a Cursor based adapter so you don’t have to parse the cursor in a list.

Edit :
Modify your RemoveArrayAdapter to accept the ArrayList that you fill with data from the Cursor:

    public class RemoveArrayAdapter extends ArrayAdapter<String> {
        private final Context context;
        private final ArrayList<String> values;

        public RemoveArrayAdapter(Context context, ArrayList<String> values) {
            super(context, R.layout.removeevent, values);
            this.context = context;
            this.values = values;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View rowView = inflater.inflate(R.layout.removeevent, parent, false);
            TextView textView = (TextView) rowView.findViewById(R.id.label);
            ImageView imageView = (ImageView) rowView.findViewById(R.id.logo);
            textView.setText(values.get(position));
            // I'm guessing you want to modify the Logo?!? if yes pass another ArrayList to this adapter
           //contaning the info to set the ImageView  
            return rowView;
        }

}

And in the RemoveActivity:

for(int i=0;i<c.getCount();i++) {
    todoItems.add(c.getString(0));
    c.moveToNext();
}
setListAdapter(new RemoveArrayAdapter(this, todoItems));