Set AnimationDrawable running to false unless animation is scheduled

import android.util.AttributeSet;

/**

 * An object used to create frame-by-frame animations, defined by a series of Drawable objects,

 * which can be used as a View object's background.

 * An object used to create frame-by-frame animations, defined by a series of

 * Drawable objects, which can be used as a View object's background.

 * <p>

 * The simplest way to create a frame-by-frame animation is to define the animation in an XML

 * file, placed in the res/drawable/ folder, and set it as the background to a View object. Then, call

 * {@link #start()} to run the animation.

 * The simplest way to create a frame-by-frame animation is to define the

 * animation in an XML file, placed in the res/drawable/ folder, and set it as

 * the background to a View object. Then, call {@link #start()} to run the

 * animation.

 * <p>

 * An AnimationDrawable defined in XML consists of a single <code>&lt;animation-list></code> element,

 * and a series of nested <code>&lt;item></code> tags. Each item defines a frame of the animation.

 * See the example below.

 * </p>

 * <p>spin_animation.xml file in res/drawable/ folder:</p>

 * <pre>&lt;!-- Animation frames are wheel0.png -- wheel5.png files inside the

 * res/drawable/ folder -->

 * An AnimationDrawable defined in XML consists of a single

 * {@code <animation-list>} element and a series of nested

 * {@code <item>} tags. Each item defines a frame of the animation. See

 * the example below.

 * <p>

 * spin_animation.xml file in res/drawable/ folder:

 * <pre>

 * <!-- Animation frames are wheel0.png through wheel5.png

 *     files inside the res/drawable/ folder -->

 * <animation-list android:id="@+id/selected" android:oneshot="false">

 *    <item android:drawable="@drawable/wheel0" android:duration="50" />

 *    <item android:drawable="@drawable/wheel1" android:duration="50" />

 *    <item android:drawable="@drawable/wheel4" android:duration="50" />

 *    <item android:drawable="@drawable/wheel5" android:duration="50" />

 * &lt;/animation-list&gt;</pre>

 *

 * <p>Here is the code to load and play this animation.</p>

 * <p>

 * Here is the code to load and play this animation.

 * <pre>

 * // Load the ImageView that will host the animation and

 * // set its background to our AnimationDrawable XML resource.

    }

    /**

     * <p>Starts the animation, looping if necessary. This method has no effect

     * if the animation is running. Do not call this in the {@link android.app.Activity#onCreate}

     * method of your activity, because the {@link android.graphics.drawable.AnimationDrawable} is

     * not yet fully attached to the window. If you want to play

     * the animation immediately, without requiring interaction, then you might want to call it

     * from the {@link android.app.Activity#onWindowFocusChanged} method in your activity,

     * which will get called when Android brings your window into focus.</p>

     * Starts the animation, looping if necessary. This method has no effect

     * if the animation is running.

     * <p>

     * <strong>Note:</strong> Do not call this in the

     * {@link android.app.Activity#onCreate} method of your activity, because

     * the {@link AnimationDrawable} is not yet fully attached to the window.

     * If you want to play the animation immediately without requiring

     * interaction, then you might want to call it from the

     * {@link android.app.Activity#onWindowFocusChanged} method in your

     * activity, which will get called when Android brings your window into

     * focus.

     *

     * @see #isRunning()

     * @see #stop()

    }

    /**

     * <p>Stops the animation. This method has no effect if the animation is

     * not running.</p>

     * Stops the animation. This method has no effect if the animation is not

     * running.

     *

     * @see #isRunning()

     * @see #start()

    }

    /**

     * <p>Indicates whether the animation is currently running or not.</p>

     * Indicates whether the animation is currently running or not.

     *

     * @return true if the animation is running, false otherwise

     */

    }

    /**

     * <p>This method exists for implementation purpose only and should not be

     * called directly. Invoke {@link #start()} instead.</p>

     * This method exists for implementation purpose only and should not be

     * called directly. Invoke {@link #start()} instead.

     *

     * @see #start()

     */

    }

    /**

     * Add a frame to the animation

     * Adds a frame to the animation

     *

     * @param frame The frame to add

     * @param duration How long in milliseconds the frame should appear

     */

    public void addFrame(Drawable frame, int duration) {

    public void addFrame(@NonNull Drawable frame, int duration) {

        mAnimationState.addFrame(frame, duration);

        if (mCurFrame < 0) {

            setFrame(0, true, false);

    }

    private void nextFrame(boolean unschedule) {

        int next = mCurFrame+1;

        final int N = mAnimationState.getChildCount();

        if (next >= N) {

            next = 0;

        int nextFrame = mCurFrame + 1;

        final int numFrames = mAnimationState.getChildCount();

        final boolean isLastFrame = mAnimationState.mOneShot && nextFrame >= (numFrames - 1);

        // Loop if necessary. One-shot animations should never hit this case.

        if (!mAnimationState.mOneShot && nextFrame >= numFrames) {

            nextFrame = 0;

        }

        setFrame(next, unschedule, !mAnimationState.mOneShot || next < (N - 1));

        setFrame(nextFrame, unschedule, !isLastFrame);

    }

    private void setFrame(int frame, boolean unschedule, boolean animate) {

        selectDrawable(frame);

        if (unschedule || animate) {

            unscheduleSelf(this);

            mRunning = false;

        }

        if (animate) {

            // Unscheduling may have clobbered these values; restore them

    }

    @Override

    @NonNull

    public Drawable mutate() {

        if (!mMutated && super.mutate() == this) {

            mAnimationState.mutate();

        private int[] mDurations;

        private boolean mOneShot = false;

        AnimationState(AnimationState orig, AnimationDrawable owner,

                Resources res) {

        AnimationState(AnimationState orig, AnimationDrawable owner, Resources res) {

            super(orig, owner, res);

            if (orig != null) {