How to make a progress bar use an image to show progress instead of using a color in Android

I have a logo image that I would like to use in my progress bar. Each time an image is downloaded, my progress bar creeps up using a blue bar. However, I would prefer that it slowly display my logo image, one bit at a time. I tried:

android:progressDrawable="@drawable/logo"

but that just set the entire progress bar immediately to my image. I also tried setting it dynamically with:

progressBar.setProgressDrawable(getResources()...etc)

but this just left me with no view and a bl开发者_如何学Goack empty space.

Can be done?

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Create a ClipDrawable and set your progressDrawable in XML to point to that ClipDrawable XML which looks something like this:

<?xml version="1.0" encoding="utf-8"?>
<clip xmlns:android="http://schemas.android.com/apk/res/android"
    android:drawable="@drawable/logo"
    android:clipOrientation="horizontal"
    android:gravity="left" />
</clip>

Then in the onProgress just call yourDrawable.setLevel(progressAmount)

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Try to use:

progressBar.setIndeterminateDrawable(getResources()...etc)