Question

I have:

1. One MyListActivity class extends ListActivity setContentView(R.layout.mylist);
2. Two xml files: mylist.xml and list_row.xml.
3. mylist.xml is the layout and list_row.xml is how each row looks like.
4. list_row.xml contains 3 TextViews(t1,t2,t3).

I want to change some text of t2 in MyListActivity class. Because the content view is mylist.xml so I can’t simply use findViewById. So I used LayoutInflater.

    LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
    View v = inflater.inflate(R.layout.list_row, null);

    textView2 = (TextView) v.findViewById(R.id.t2);
    textView2.setText("ccccc");

The problem is that the text of t2 is never changed. I have tried many times and the text remains the text I set in the list_row.xml. I can’t figure out why.. Could someone help please. Thanks!

=====Solution:=====

Create my own SimpleCursorAdapter class and override the getView() method.

private class MySimpleCursorAdapter extends SimpleCursorAdapter {
    Cursor c;
    public MySimpleCursorAdapter(Context context, int layout, Cursor c,
            String[] from, int[] to) {
        super(context, layout, c, from, to);
        this.c = c;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        super.getView(position, convertView, parent);
        LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
        View rowView = inflater.inflate(R.layout.list_row, parent, false);
        TextView textview1 = (TextView) rowView.findViewById(R.id.text1);
        textView1.setText(c.getString(1));// whatever should be in textView1
        textView2 = (TextView) rowView.findViewById(R.id.text2);
        textView2.setText("ccccc");
        return rowView;
    }
}

The super.getView(position, convertView, parent); is quite important because if I don’t have that line, textView1 will always show the value of first row(e.g. if textView1 shows the id, then this is always 1).

Answer 1

If you want to change the TextView text you will have to do it in the adapter of the ListView.