Reputation: 7
When creating a Adapter for a GridView, like following :
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageAdapter(Context c) {
mContext = c;
}
public int getCount() {
return mThumbIds.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null) { // if it's not recycled, initialize some attributes
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(85, 85));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
} else {
imageView = (ImageView) convertView;
}
imageView.setImageResource(mThumbIds[position]);
return imageView;
}
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7
}
How does Adapter know how many items it has to display on screen? What if I want several items to display the same picture ? Thanks.
Upvotes: 0
Views: 957
Reputation: 17401
Whatever count the getCount method returns is the number of items adapter is going to display
public int getCount() {
return mThumbIds.length;
}
If you want several items to display same image create a different array of images, having some repeated images, and return length of that array.
for eg:
// references to our images
private Integer[] mThumbIds = {
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_5, R.drawable.sample_5
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.sample_7, R.drawable.sample_7
}
Upvotes: 1