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I don't know if this is possible, is it possible for me to inflate a listview using only its id? Thanks.

Jamie Hutton
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OckhamsRazor
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  • I think you should only inflate _layouts_ i.e. `ViewGroup`s. Maybe what you want is to set the visibility of a View from GONE to VISIBLE? – Laurent' Oct 06 '11 at 12:02
  • thanks laurent. yeah i tried inflating an xml file. that works. however, when i try expanding using the id of the root layout in this file, everything fails. – OckhamsRazor Oct 06 '11 at 12:13
  • Judging from the doc, it seems that the id has to be a xml file. Not a View. Could you please tell us why you need this to help find another solution? – Laurent' Oct 06 '11 at 12:18
  • i want to only inflate a specific portion of an xml file, and not the whole file. – OckhamsRazor Oct 06 '11 at 12:23

3 Answers3

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I think you may be confused about the difference between a component ID and a layout ID.

A layout ID refers to the name of a layout XML file. For example, if you have a layout named res/layout/home_activity.xml, its ID would be stored as R.layout.home_activity.

A component ID refers to the identity of a UI component inside an existing layout. So, inside your home_activity.xml layout you might have <TextView android:id="@+id/my_textview" />. The ID of that View is R.id.my_textview.

You can only inflate layouts using a layout ID. 'Inflating' a component ID doesn't make any sense, unless you inflate a layout as a child of a View with a specific ID.

Dave
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  • thanks dave. that really helped clear my confusion. but do you know how i can "inflate a layout as a child of a View with a specific ID"? an example would really help. – OckhamsRazor Oct 06 '11 at 12:25
  • Well, say you already have a reference to a (e.g.) `LinearLayout`, let's call it `root`. And say you've just inflated a layout, so you now have a `View` called `myInflatedLayout`. You could do `root.addView(myInflatedLayout)`. – Dave Oct 06 '11 at 12:41
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Now that things are more clear, I suggest that you set your 'Inflatable ListView' as gone in your Layout file using:

<ListView android:visibility="gone" ... />

Then just set it to visible using View.setVisibility() whenever you want it to 'inflate'

mHiddenListView.setVisibility(View.VISIBLE);
Laurent'
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Yes, the layout inflater inflates any View from the Resource id.

LayoutInflater inflater = (LayoutInflater)context.getSystemService
      (Context.LAYOUT_INFLATER_SERVICE);
listView = inflater.inflate(R.id.your_listview, parentView );

Edit: Well, it has to be a layout ID referring to some xml layout, not a component of it. Why don't you create a new xml containing that view component that you want to extract?

Reno
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