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POHow to set size and layout in onSizeChanged?
 

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  1. POHow to set size and layout in onSizeChanged?
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    <p>I can't get my elements, for example <code>ListView</code>, to resize properly.</p> <p>I got a <code>ListActivity</code> for searching, with a dashboard, an editbox and a listview. The idea is to hide the actionbar while the keyboard is showing.</p> <p>I extended <code>LinearLayout</code>, to listen to view size changes (as recommended <a href="https://stackoverflow.com/questions/3825918/way-to-be-notified-when-the-software-keyboard-is-showing-hiding">here</a>) :</p> <pre><code>public class SizeChangingLinearLayout extends LinearLayout { //... @Override protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) { View actionbar = mainView.findViewById(R.id.actionbar); if (yNew &gt; yOld) actionbar.setVisibility(View.VISIBLE); else if (yNew &lt; yOld) actionbar.setVisibility(View.GONE); super.onSizeChanged(xNew, yNew, xOld, yOld); } } </code></pre> <p>The hiding/showing of the actionbar works as expected but there is a gap below the <code>ListView</code> of the same height as the hidden actionbar. As soon as any graphics change (e.g. writing in the editbox) the <code>ListView</code> fills the gap. A similar behavior appears in reverse, when hiding the keyboard.</p> <p><img src="https://i.stack.imgur.com/yGXLK.png" alt="enter image description here"></p> <p>[Edit]</p> <p>The same problem also appears in changing other layout. Changing <code>Visibility</code> of things in <code>onSizeChanged</code> shows directly, but changing sizes and margins does not show until some other user action redraws those views. Invalidation does not work from <code>onSizeChanged</code>.</p> <p>[/Edit]</p> <p>I have tried to refresh the graphics by:</p> <ul> <li><code>invalidate</code>-ing both the custom LinearLayout and the <code>ListView</code> (as recommended <a href="https://stackoverflow.com/questions/1017853/android-how-to-redraw-a-graphic-element">here</a>)</li> <li><code>notifyDataSetChanged</code> on the list's adapter</li> <li><code>forceLayout</code></li> </ul> <p>... and more, without success. Why is the <code>ListView</code> not resizing at first? Do I have to override <code>onLayout</code> in my extended LinearLayout? What have I missed?</p>
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    1. CONot any update works, I noticed. "As soon as any graphics change", I wrote. But for example a popup won't make the changes made show. I guess the right elements has to be invalidated, but they don't.
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    2. COThe problem also appears for all layout changes, for example changing margins of the EditText. But _adding_ layout elements, for example a button to the right of the box, shows immediately though.
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