I have an issue which I didn't found any solutions on stackoverflow (or anywhere else so far).
Summary :
I have scrollview and inside of it a ListView with visibility gone (Can switch with a TextView).
When I set the adapter content, in my activity the onScroll get call with 4 visibles Item but the getView of the adapter get call for the whole dataSet (181 items) which bring a lot of performance issues / imageref_ashmem create failed ... (Of course remove image loading remove fail of creation but well :D)
=== Activity ===
Result of Activity in onScroll
firstVisibleItem 0
visibleItemCount 4
totalItemCount 181
=== Layout extract ===
<ScrollView
android:id="@+id/UserProfileView_ScrollView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:background="#00FFFFFF" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00FFFFFF" >
<RelativeLayout
android:id="@+moreDetails/UserProfileView_BottomLayout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_below="@+profile/UserProfileView_MoreDetails"
android:background="#FFFFFFFF" >
<TextView
android:id="@+id/UserProfileView_About"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#ff111111"
android:visibility="gone" />
<ListView
android:id="@+id/UserProfileView_MoreDetails_ListView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:footerDividersEnabled="false"
android:divider="@color/unactivatedLightGray"
android:dividerHeight="1dp"
android:listSelector="@android:color/transparent"
android:visibility="gone" />
</RelativeLayout>
</RelativeLayout>
</ScrollView>
The height of the BottomLayout is set to 3/4 of the width of the screen programmatically.
=== Adapter ===
public class CommonAdapter extends BaseAdapter {
public List<Common> list;
private LayoutInflater inflater;
private AQuery aq;
public CommonAdapter(Context context, List<Common> list) {
this.inflater = LayoutInflater.from(context);
this.list = list;
this.aq = new AQuery(context);
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
private class ViewHolder {
ImageView thumbImg;
TextView name;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.list_view_item, null);
holder.thumbImg = (ImageView) convertView.findViewById(R.id.CommonCell_Thumb);
holder.name = (TextView) convertView.findViewById(R.id.CommonCell_Name);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Common obj = list.get(position);
if (list.get(position).getPicture() != null)
aq.id(holder.thumbImg).image(obj.getPicture());
else
aq.id(holder.thumbImg).image(Util.Thumb(list.get(position).getId()), options);
holder.name.setText(obj.getName());
return convertView;
}
}
EDIT : Every time I scroll, the whole dataset it parse again, so 181 call to getView.
I fixed the issue by set the ListView to an arbitrary Height.
<ListView
android:id="@+id/UserProfileView_MoreDetails_ListView"
android:layout_width="match_parent"
android:layout_height="1080dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:footerDividersEnabled="false"
android:divider="@color/unactivatedLightGray"
android:dividerHeight="1dp"
android:listSelector="@android:color/transparent"
android:visibility="gone" />