Android: listview with different items (optimization)

Question

I'm reading this tutorial http://android.amberfog.com/?p=296 . I have just a question: if I definire an xml layout like this one:

 <LinearLayout>

    <ListView/>

    <TextView android:id="@+id/id1" />

    <TextView android:id="@+id/id2" />

    <ImageView android:id="@+id/id3" />

    <TextView android:id="@+id/id4" />

</LinearLayout>

Now, suppose that to show the item type A I use the Textview id1 and id2: For the item type B I use id1 and the imageview id3. For the item type C id1, id2 and id3. For the item type D the id4, etc etc. In a case like this, having textviews and imageviews (in the xml layout) which will not be used by every item in the listview, will it be slow (in performance)? Thank you in advance

Create a seperate layout file for each of your item types. – Philipp Jahoda Sep 16 '13 at 10:42 — Philipp Jahoda, Sep 16 '13 at 10:42
A sample ? I don't understand how, sorry :) – user1315621 Sep 16 '13 at 17:17 — user1315621, Sep 16 '13 at 17:17

score 1 · Accepted Answer · answered Sep 16 '13 at 10:45

1

If you're using an adapter, you can create a separate layout for each type of item and inflate a different layout in getView method of your adapter.

answered Sep 16 '13 at 10:45

Szymon

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The matter is that I need to have different type of item in a single layout – user1315621 Sep 16 '13 at 10:58
But you just said that based on the item type, some elements of the layout are not used? – Szymon Sep 16 '13 at 11:00
It is possibile. Con you just show me a sample code of what is your solution? Thanks – user1315621 Sep 16 '13 at 17:15
Check out this post: http://stackoverflow.com/questions/7680060/is-it-possible-to-inflate-two-layouts-in-arrayadapter-getview-in-android – Szymon Sep 16 '13 at 21:12
Well, I think I'll open another thread to explain better what is my problem – user1315621 Sep 18 '13 at 09:08

Android: listview with different items (optimization)

1 Answers1