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copied!<p>To address your trouble with initialization (I've had much trouble in the past with this myself): If I need to know when a view's layout is complete, I give it a runnable in Activity.onCreate() then call that runnable from View.onSizeChanged(). I've come to use this pattern quite a bit and I've found it very reliable. You just need to remember to only call the runnable from onSizeChanged() if the new width and height are greater than 0 and if they are not equal to the old width and height.</p> <p>So in your activity:</p> <pre><code>public void onCreate() { ... yourView.setLayoutRunnable(new Runnable() { @Override public void run() { //do post-layout stuff... } }); ... } </code></pre> <p>and in your view:</p> <pre><code>public Runnable layoutRunner; public void setLayoutRunnable(Runnable runner) { layoutRunner = runner; } @Override public void onSizeChanged(int w, int h, int oldw, int oldh) { if (w > 0 && h > 0 && (w != oldw || h != oldh)) { if (layoutRunner != null) layoutRunner.run(); } } </code></pre> <p>If you have multiple views that all need to have their layouts finished before you do your stuff, you have to keep a count as you get the notifications so you know when they're done.</p> <p>And regarding your topic in general, I implemented something similar to your radio button concept in a game I wrote, but I decided to override View from scratch to do it. I had all options for a set in a single view, so really I replaced the RadioGroup view rather than the RadioButton view. Each option had a value and an extent. I always used text, but images would work just as easily. Then I just tracked the taps and drags relative to the extents of the options and moved the "selector" on a timed handler (a la animations in javascript).</p>

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