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POandroid: how todivide linear layout elements equally
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  1. POandroid: how todivide linear layout elements equally
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    copied!<p>I have a linear layout with two listviews and two dead buttons. How to divide the space equally between the list views. I got some suggestions like setting the height to 0dip but it didn't work. The graphical layout in eclipse shows a correct layout but when I add different number of elements to the lists they expand to different height. Here is the xml.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:weightSum="2"&gt; &lt;Button android:layout_width="match_parent" android:layout_height="wrap_content" android:enabled="false" android:text="Installed engines" &gt; &lt;/Button&gt; &lt;ListView android:id="@+id/primary" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" &gt; &lt;/ListView&gt; &lt;Button android:layout_width="match_parent" android:layout_height="wrap_content" android:enabled="false" android:text="Active engines" &gt; &lt;/Button&gt; &lt;ListView android:id="@+id/secondary" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" &gt; &lt;/ListView&gt; &lt;/LinearLayout&gt; </code></pre> <h2>thanks</h2> <p>Since no one believes me here is an image of what I am getting. Just the links since I don't have enough reputation to post pics :( ! <a href="http://dl.dropbox.com/u/55295461/pic1.jpg" rel="nofollow noreferrer">run</a> ! <a href="http://dl.dropbox.com/u/55295461/pic2.jpg" rel="nofollow noreferrer">eclipse</a></p> <p>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</p> <p>After all this may not be xml issue based on this answer <a href="https://stackoverflow.com/questions/2698817/linear-layout-and-weight-in-android">Linear Layout and weight in Android</a></p> <p>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX</p> <p><em>This is correct for static XML layouts. If you're adding Views dynamically at runtime, you'll need to use addView with layout parameters like addView(button, new LinearLayout.LayoutParams(0, height, 1)); This is true even if you're inflating layouts with the correct width and weight values. – Nuthatch Sep 3 '11 at 21:41</em></p> <p>xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</p> <p>I do use the layout inflater to add my view to a tab. Maybe that is the problem .. xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx</p> <p>Here is sample code that reproduces the problem when I use an inflator.</p> <pre><code>public class TestActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ParticipantsPanel p = new ParticipantsPanel(this); setContentView(p); } } class ParticipantsPanel extends LinearLayout { public ParticipantsPanel(Context ctx) { super(ctx); LayoutInflater li = LayoutInflater.from(ctx); View myView = li.inflate(R.layout.participants, null); final ListView primary = (ListView) myView.findViewById(R.id.primary); final ListView secondary = (ListView) myView.findViewById(R.id.secondary); final ArrayAdapter&lt;String&gt; primaryA = new ArrayAdapter&lt;String&gt;(ctx,R.layout.lvtext); final ArrayAdapter&lt;String&gt; secondaryA = new ArrayAdapter&lt;String&gt;(ctx,R.layout.lvtext); primaryA.add("hello1"); primaryA.add("hello2"); primaryA.add("hello3"); primaryA.add("hello4"); primaryA.add("hello5"); primaryA.add("hello6"); primaryA.add("hello7"); primaryA.add("hello8"); secondaryA.add("select1"); secondaryA.add("select2"); primary.setAdapter(primaryA); secondary.setAdapter(secondaryA); addView(myView); } } </code></pre> <p>xxxxxxxxxxxxxxxxxxxxxxx</p> <p>Yet another update. <strong>I think the problem is as Nuthatch ( the guy I referred to from an old post) pointed out : addView() just messes up whatever layout you have in static xml, which is a valuable lesson imo. When I move the code in the ParticipantsPanel to the main activity, and set the view directly without out adding it to another linearlayout, it works as expected. I appreciate an explanation as to why that is the case, and how I may still put my code in a class and have desired behavior.</strong></p>
 

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