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PO
 

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    <p>You are trying to get width and height of an elements, that weren't drawn yet.</p> <p>If you use debug and stop at some point, you'll see, that your device screen is still empty, that's because your elements weren't drawn yet, so you can't get width and height of something, that doesn't yet exist.</p> <p>And, I might be wrong, but <code>setWidth()</code> is not always respected, <code>Layout</code> lays out it's children and decides how to measure them (calling <code>child.measure()</code>), so If you set <code>setWidth()</code>, you are not guaranteed to get this width after element will be drawn.</p> <p>What you need, is to use <code>getMeasuredWidth()</code> (the most recent measure of your View) somewhere after the view was actually drawn.</p> <p>Look into <code>Activity</code> lifecycle for finding the best moment.</p> <p><a href="http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle" rel="nofollow noreferrer">http://developer.android.com/reference/android/app/Activity.html#ActivityLifecycle</a></p> <p>I believe a good practice is to use <code>OnGlobalLayoutListener</code> like this:</p> <pre><code>yourView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { if (!mMeasured) { // Here your view is already layed out and measured for the first time mMeasured = true; // Some optional flag to mark, that we already got the sizes } } }); </code></pre> <p>You can place this code directly in <code>onCreate()</code>, and it will be invoked when views will be laid out.</p>
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    1. POHow to retrieve the dimensions of a view?
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    1. USAlex Orlov
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    1. COUnfortunately it is not working in OnResume as well. Final dimensions are set somewhere after OnResume call, at least in emulator.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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