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I'd like to dynamically change the background color of a progress bar in android. I followed the "bonus" part near the end of the page of this tutorial: http://colintmiller.com/2010/10/how-to-add-text-over-a-progress-bar-on-android/ It changes the color, but only once. If called more than once, the progress bar disappears. Here's the code. Here's the progress bar definition: <ProgressBar android:id="@+id/progress_bar" android:layout_width="fill_parent" android:layout_height="wrap_content" style="@android:style/Widget.ProgressBar.Horizontal" android:layout_marginRight="5dp" /> This is the drawable definition in res/drawable/green_progress.xml: <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@android:id/background"> <shape> <corners android:radius="5dip" /> <gradient android:startColor="#ff9d9e9d" android:centerColor="#ff5a5d5a" android:centerY="0.75" android:endColor="#ff747674" android:angle="270" /> </shape> </item> <item android:id="@android:id/secondaryProgress"> <clip> <shape> <corners android:radius="5dip" /> <gradient android:startColor="#80ffd300" android:centerColor="#80ffb600" android:centerY="0.75" android:endColor="#a0ffcb00" android:angle="270" /> </shape> </clip> </item> <item android:id="@android:id/progress"> <clip> <shape> <corners android:radius="5dip" />

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