title: What does android:progressTintMode, android:secondaryProgressTintMode and android:progressDrawable do?
body: <p>I am making a custom ProgressBar. How does <code>android:progressTintMode</code> and <code>android:secondaryProgressTintMode</code> effect the look of the Progress Bar? <br/>I looked into the <a href="http://developer.android.com/reference/android/widget/ProgressBar.html#attr_android:progressTint" rel="nofollow">docs</a> but couldn't understand.<br/> Also how does <code>android:progressDrawable</code> effect the Progress Bar?</p>