每行具有自定义布局的ListView

Question

I setup a listview with a layout XML for each row:

    this.setContentView(R.layout.item_view);

    ListView m_ListView = this.getListView();
    m_ListView.setTextFilterEnabled(true);
    m_ListView.setItemsCanFocus(false);
    m_ListView.setCacheColorHint(0x00000000);
    mInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    ArrayList<View> views=new ArrayList<View>();
    e = mInflater.inflate(R.layout.item_first, null);

    views.add(e);

    r = mInflater.inflate(R.layout.item_second, null);

    views.add(r);


    mAdapter = new SillyAdapter(views);
    setListAdapter(mAdapter);

now for example i have a TextView in item_first and i want to set it from the code:

    TextView name = (TextView)findViewById(R.id.textView1);
    name.setText(m_item.name);

but name is always null.any idea why it happen?

Answer 1

You have to do the following changes in your code.

TextView name = (TextView)e.findViewById(R.id.textView1);
name.setText(m_item.name);

You are getting name as null since you are calling findViewById method from wrong view or might be calling from activity. since you are inflating as follows

 e = mInflater.inflate(R.layout.item_first, null);

you have to call findViewById on inflated view e . so that you will get the instance of textview with id R.id.textView1 contained in xml R.layout.item_first

Hope this will help.