StackOverflow2013

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copied!<p>Here's what I did in my activity to figure out the content layout of a particular view child that I knew stretched end-to-end on the screen (a webview in this case):</p> <p>First, inherit from OnGlobalLayoutListener:</p> <pre><code>public class ContainerActivity extends Activity implements ViewTreeObserver.OnGlobalLayoutListener { ... </code></pre> <p>Next, implement onGlobalLayout method of listener's interface (note I do some pixel calcs that pertain to figuring out the medium-zoom dip :</p> <pre><code>@Override public void onGlobalLayout() { int nH = this.mWebView.getHeight(); int nW = this.mWebView.getWidth(); if (nH > 0 && nW > 0) { DisplayMetrics oMetrics = new DisplayMetrics(); this.getWindowManager().getDefaultDisplay().getMetrics(oMetrics); nH = (nH * DisplayMetrics.DENSITY_DEFAULT) / oMetrics.densityDpi; nW = (nW * DisplayMetrics.DENSITY_DEFAULT) / oMetrics.densityDpi; // do something with nH and nW this.mWebView.getViewTreeObserver().removeGlobalOnLayoutListener ( this ); ... } } </code></pre> <p>Finally, make sure to tell the view element (mWebView in this case) inside onCreate() that you're listening to layout events:</p> <pre><code>this.setContentView(this.mWebView = new WebView(this)); this.mWebView.getViewTreeObserver().addOnGlobalLayoutListener ( this ); </code></pre> <p>This approach works for older android versions. I believe ics+ has a layout listener for each view you can bind to, and as such, would be used in a similar way.</p>

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