Angle of mobile while using
<p>I'm working on an Android program for my research.</p>

<p>It needs to find out the angle while user using my mobile phone.</p>

<p>The angle here is like a rotation angle of entire mobile phone, not the widgets in layout.</p>

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<p>I've tried keyword "angle" on <a href="http://developer.android.com/reference/packages.html" rel="nofollow">http://developer.android.com/reference/packages.html</a></p>

<p>And I found a method "onSensorChanged" under public interface SensorListener</p>

<p>But the description there is too hard to me to understand :Q</p>

<p>Is it the function I want?</p>
