List View with images and text
I'm trying to do a 开发者_运维技巧List that shows an image and a simple text describing the image.
In my search on internet I found many ways to do this. Some people using ArrayAdapter, others using SimpleCursorAdapter. One thing I notice, many people are creating classes inheriting from ListActivity and in the setListAdapter
method they are inserting other classes derived from Array or SimpleCursor adapter.
First question: is this the best way to do this?
I created a LinearLayout with a ListView inside. And to insert rows, another layout was created with an ImageView
and a TextView
.
Second question: is this correct?
I'm confusing about creation of this type of component. Is this the correct way to do this?
Yes, this is correct, although you will need to use a CursorAdapter
instead of a SimpleCursorAdapter
, since the point of a SimpleCursorAdapter
is to populate a row with only a TextView
in it.
You will have a getView
method on your CursorAdapter
that expands your row layout:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) { // we don't have a recycled view
convertView = LayoutInflator.from(getContext()).inflate(
R.layout.row, parent, false);
}
// setup our row
TextView text = (TextView) convertView.findViewById(R.id.text_view);
text.setText( ... );
ImageView image = (ImageView) convertView.findViewById(R.id.image_view);
image.setImageBitmap( ... );
return convertView;
}
When you're setting the text and image of your views, you can use adapter methods like getItem
to access the underlying data you need.
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