Would you be interested in something like this:

public class DrawerIndicatorDrawable extends DrawerArrowDrawable implements ValueAnimator.AnimatorUpdateListener {
    private final ValueAnimator mValueAnimator;

    public DrawerIndicatorDrawable(final Resources resources) {
        super(resources);
        mValueAnimator = new ValueAnimator();
        mValueAnimator.addUpdateListener(this);
    }

    public DrawerIndicatorDrawable(final Resources resources, final boolean rounded) {
        super(resources, rounded);
        mValueAnimator = new ValueAnimator();
        mValueAnimator.addUpdateListener(this);
    }

    public void setToArrow() {
        super.setFlip(true);
        restartAnimatorTo(1f);
    }

    public void setToDrawer() {
        super.setFlip(false);
        restartAnimatorTo(0f);
    }

    public void restartAnimatorTo(final float targetParameter) {
        mValueAnimator.cancel();
        mValueAnimator.setObjectValues(this.parameter, targetParameter);
        mValueAnimator.start();
    }

    @Override
    public void onAnimationUpdate(final ValueAnimator animation) {
        final float value = (Float) animation.getAnimatedValue();
        super.setParameter(value);
    }

    @Override
    public void setFlip(final boolean flip) {
        mValueAnimator.cancel();
        super.setFlip(flip);
    }

    @Override public void setParameter(final float parameter) {
        mValueAnimator.cancel();
        super.setParameter(parameter);
    }
}

I have a use case where I want to animate to or from the arrow whenever the drawer is locked/unlocked.

The Issue no 11 is resolved by changing - runProguard false to minifyEnabled false Note - Gradle must be 2.2 or above to use minifyEnabled

Also build tools changed to 21.0.0 to resolve following error -

Error:Execution failed for task ':app:transformClassesWithDexForDebug'.

com.android.build.api.transform.TransformException: java.lang.RuntimeException: java.lang.RuntimeException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: java.lang.IllegalStateException: Multi dex requires Build Tools 21.0.0 / Current: 20

Error message - Could not find method runProguard() for arguments [false] on BuildType_Decorated{name=release, debuggable=false, testCoverageEnabled=false, jniDebuggable=false, pseudoLocalesEnabled=false, renderscriptDebuggable=false, renderscriptOptimLevel=3, minifyEnabled=false, zipAlignEnabled=true, signingConfig=null, embedMicroApp=true, mBuildConfigFields={}, mResValues={}, mProguardFiles=[], mConsumerProguardFiles=[], mManifestPlaceholders={}} of type com.android.build.gradle.internal.dsl.BuildType.

The GIF linked in the readme is 1.6 MB, and playback is super stuttery on my machine.

I ran it through ImageOptim, and it came out pixel-for-pixel identical, but 6× smaller and with much smoother playback. I would submit a pull request, but the gif isn't hosted in this repo (perhaps it should be?).

Edit: DrawerArrowDrawable needs to override getConstantState or it will throw a NullPointerException here: https://github.com/android/platform_frameworks_base/blob/kitkat-release/core/java/com/android/internal/widget/ActionBarView.java#L1637

I am using DrawerArrowDrawable with SlidingMenu and it works great. However, when I tried adding android.widget.SearchView in the menu it crashes the app.

E/AndroidRuntime( 4635): java.lang.NullPointerException
E/AndroidRuntime( 4635):    at com.android.internal.widget.ActionBarView$ExpandedActionViewMenuPresenter.expandItemActionView(ActionBarView.java:1711)
E/AndroidRuntime( 4635):    at com.android.internal.view.menu.MenuBuilder.expandItemActionView(MenuBuilder.java:1236)
E/AndroidRuntime( 4635):    at com.android.internal.view.menu.MenuItemImpl.expandActionView(MenuItemImpl.java:625)
E/AndroidRuntime( 4635):    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:879)
E/AndroidRuntime( 4635):    at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java:558)
E/AndroidRuntime( 4635):    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:187)
E/AndroidRuntime( 4635):    at com.htc.internal.widget.HtcScaleAnimController.onClick(HtcScaleAnimController.java:334)
E/AndroidRuntime( 4635):    at android.view.View.performClick(View.java:4480)
E/AndroidRuntime( 4635):    at android.view.View$PerformClick.run(View.java:18686)
E/AndroidRuntime( 4635):    at android.os.Handler.handleCallback(Handler.java:733)
E/AndroidRuntime( 4635):    at android.os.Handler.dispatchMessage(Handler.java:95)
E/AndroidRuntime( 4635):    at android.os.Looper.loop(Looper.java:157)
E/AndroidRuntime( 4635):    at android.app.ActivityThread.main(ActivityThread.java:5872)
E/AndroidRuntime( 4635):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 4635):    at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime( 4635):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:852)
E/AndroidRuntime( 4635):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:668)
E/AndroidRuntime( 4635):    at dalvik.system.NativeStart.main(Native Method)

To reproduce this issue:

1. Create a new Activity.
2. Set DrawerArrowDrawable as the ActionBar icon:

getActionBar().setIcon(new DrawerArrowDrawable(getResources()));

3. Add a SearchView to the ActionBar

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/ic_action_search"
        android:showAsAction="ifRoom|collapseActionView"
        android:title="@string/search"/>

</menu>

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.options_menu, menu);
    return true;
}

4. Click on the search MenuItem that should display the SearchView in the action bar,