Android动画

ImageView image = (ImageView) findViewById(R.id.image);
Animation hyperspaceJump = AnimationUtils.loadAnimation(this, R.anim.hyperspace_jump);
image.startAnimation(hyperspaceJump);

AlphaAnimation alphaAnimation = new AlphaAnimation(0.0f, 1.0f);
alphaAnimation.setDuration(300);
image.startAnimation(alphaAnimation);

public static interface AnimationListener {
    void onAnimationStart(Animation animation);
    void onAnimationEnd(Animation animation);
    void onAnimationRepeat(Animation animation);
}

public class Rotate3dAnimation extends Animation {
    private final float mFromDegrees;
    private final float mToDegrees;
    private final float mCenterX;
    private final float mCenterY;
    private final float mDepthZ;
    private final boolean mReverse;
    private Camera mCamera;

    /**
     * Creates a new 3D rotation on the Y axis. The rotation is defined by its
     * start angle and its end angle. Both angles are in degrees. The rotation
     * is performed around a center point on the 2D space, definied by a pair of
     * X and Y coordinates, called centerX and centerY. When the animation
     * starts, a translation on the Z axis (depth) is performed. The length of
     * the translation can be specified, as well as whether the translation
     * should be reversed in time.
     *
     * @param fromDegrees
     *            the start angle of the 3D rotation
     * @param toDegrees
     *            the end angle of the 3D rotation
     * @param centerX
     *            the X center of the 3D rotation
     * @param centerY
     *            the Y center of the 3D rotation
     * @param reverse
     *            true if the translation should be reversed, false otherwise
     */
    public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ,
            boolean reverse) {
        mFromDegrees = fromDegrees;
        mToDegrees = toDegrees;
        mCenterX = centerX;
        mCenterY = centerY;
        mDepthZ = depthZ;
        mReverse = reverse;
    }

    @Override
    public void initialize(int width, int height, int parentWidth, int parentHeight) {
        super.initialize(width, height, parentWidth, parentHeight);
        mCamera = new Camera();
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
        final float fromDegrees = mFromDegrees;
        float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);

        final float centerX = mCenterX;
        final float centerY = mCenterY;

        final Camera camera = mCamera;

        final Matrix matrix = t.getMatrix();

        camera.save();

        if (mReverse) {
            camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
        } else {
            camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
        }
        camera.rotateY(degrees);
        camera.getMatrix(matrix);
        camera.restore();

        matrix.preTranslate(-centerX, -centerY);
        matrix.postTranslate(centerX, centerY);
    }
}

ImageView rocketImage = (ImageView) findViewById(R.id.rocket_image);
rocketImage.setBackgroundResource(R.drawable.rocket_thrust);

rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
rocketAnimation.start();

Animation animation = AnimationUtils.loadAnimation(this, R.anim.anim_item);
LayoutAnimationController controller = new LayoutAnimationController(animation);
controller.setDelay(0.5);
controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
listView.setLayoutAnimation(controller);

AnimatorSet set = (AnimatorSet) AnimatorInflater.loadAnimator(myContext,
    R.anim.property_animator);
set.setTarget(myObject);
set.start();

public static interface AnimatorListener {
    void onAnimationStart(Animator animation);
    void onAnimationEnd(Animator animation);
    void onAnimationCancel(Animator animation);
    void onAnimationRepeat(Animator animation);
}

public static interface AnimatorPauseListener {
    void onAnimationPause(Animator animation);
    void onAnimationResume(Animator animation);
}

public static interface AnimatorUpdateListener {
    void onAnimationUpdate(ValueAnimator animation);
}

ValueAnimator animation = ValueAnimator.ofFloat(0f, 100f);
animation.setDuration(1000);
animation.start();

ValueAnimator animation = ValueAnimator.ofObject(new MyTypeEvaluator(), startPropertyValue, endPropertyValue);
animation.setDuration(1000);
animation.start();

animation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator updatedAnimation) {
        // You can use the animated value in a property that uses the
        // same type as the animation. In this case, you can use the
        // float value in the translationX property.
        float animatedValue = (float)updatedAnimation.getAnimatedValue();
        textView.setTranslationX(animatedValue);
    }
});

ObjectAnimator animation = ObjectAnimator.ofFloat(textView, "translationX", 100f);
animation.setDuration(1000);
animation.start();

AnimatorSet bouncer = new AnimatorSet();
bouncer.play(bounceAnim).before(squashAnim1);
bouncer.play(squashAnim1).with(squashAnim2);
bouncer.play(squashAnim1).with(stretchAnim1);
bouncer.play(squashAnim1).with(stretchAnim2);
bouncer.play(bounceBackAnim).after(stretchAnim2);
ValueAnimator fadeAnim = ObjectAnimator.ofFloat(newBall, "alpha", 1f, 0f);
fadeAnim.setDuration(250);
AnimatorSet animatorSet = new AnimatorSet();
animatorSet.play(bouncer).before(fadeAnim);
animatorSet.start();

<LinearLayout
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:id="@+id/verticalContainer"
    android:animateLayoutChanges="true" />

Keyframe kf0 = Keyframe.ofFloat(0f, 0f);
Keyframe kf1 = Keyframe.ofFloat(.5f, 360f);
Keyframe kf2 = Keyframe.ofFloat(1f, 0f);
PropertyValuesHolder pvhRotation = PropertyValuesHolder.ofKeyframe("rotation", kf0, kf1, kf2);
ObjectAnimator rotationAnim = ObjectAnimator.ofPropertyValuesHolder(target, pvhRotation)
rotationAnim.setDuration(5000ms);

ObjectAnimator animX = ObjectAnimator.ofFloat(myView, "x", 50f);
ObjectAnimator animY = ObjectAnimator.ofFloat(myView, "y", 100f);
AnimatorSet animSetXY = new AnimatorSet();
animSetXY.playTogether(animX, animY);
animSetXY.start();

PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("x", 50f);
PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("y", 100f);
ObjectAnimator.ofPropertyValuesHolder(myView, pvhX, pvyY).start();

myView.animate().x(50f).y(100f);

public interface TimeInterpolator {
    float getInterpolation(float input);
}

public interface Interpolator extends TimeInterpolator {
    // A new interface, TimeInterpolator, was introduced for the new android.animation
    // package. This older Interpolator interface extends TimeInterpolator so that users of
    // the new Animator-based animations can use either the old Interpolator implementations or
    // new classes that implement TimeInterpolator directly.
}

public interface TypeEvaluator<T> {

    /**
     * This function returns the result of linearly interpolating the start and end values, with
     * <code>fraction</code> representing the proportion between the start and end values. The
     * calculation is a simple parametric calculation: <code>result = x0 + t * (x1 - x0)</code>,
     * where <code>x0</code> is <code>startValue</code>, <code>x1</code> is <code>endValue</code>,
     * and <code>t</code> is <code>fraction</code>.
     *
     * @param fraction   The fraction from the starting to the ending values
     * @param startValue The start value.
     * @param endValue   The end value.
     * @return A linear interpolation between the start and end values, given the
     *         <code>fraction</code> parameter.
     */
    public T evaluate(float fraction, T startValue, T endValue);

}

@Override
public void start() {
    AnimationHandler.getInstance().autoCancelBasedOn(this);
    if (DBG) {
        Log.d(LOG_TAG, "Anim target, duration: " + getTarget() + ", " + getDuration());
        for (int i = 0; i < mValues.length; ++i) {
            PropertyValuesHolder pvh = mValues[i];
            Log.d(LOG_TAG, "   Values[" + i + "]: " +
                pvh.getPropertyName() + ", " + pvh.mKeyframes.getValue(0) + ", " +
                pvh.mKeyframes.getValue(1));
        }
    }
    super.start();
}

// AnimationHandler
void autoCancelBasedOn(ObjectAnimator objectAnimator) {
    for (int i = mAnimationCallbacks.size() - 1; i >= 0; i--) {
        AnimationFrameCallback cb = mAnimationCallbacks.get(i);
        if (cb == null) {
            continue;
        }
        if (objectAnimator.shouldAutoCancel(cb)) {
            ((Animator) mAnimationCallbacks.get(i)).cancel();
        }
    }
}

// ObjectAnimator
boolean shouldAutoCancel(AnimationHandler.AnimationFrameCallback anim) {
    if (anim == null) {
        return false;
    }

    if (anim instanceof ObjectAnimator) {
        ObjectAnimator objAnim = (ObjectAnimator) anim;
        if (objAnim.mAutoCancel && hasSameTargetAndProperties(objAnim)) {
            return true;
        }
    }
    return false;
}

private boolean hasSameTargetAndProperties(@Nullable Animator anim) {
    if (anim instanceof ObjectAnimator) {
        PropertyValuesHolder[] theirValues = ((ObjectAnimator) anim).getValues();
        if (((ObjectAnimator) anim).getTarget() == getTarget() &&
                mValues.length == theirValues.length) {
            for (int i = 0; i < mValues.length; ++i) {
                PropertyValuesHolder pvhMine = mValues[i];
                PropertyValuesHolder pvhTheirs = theirValues[i];
                if (pvhMine.getPropertyName() == null ||
                        !pvhMine.getPropertyName().equals(pvhTheirs.getPropertyName())) {
                    return false;
                }
            }
            return true;
        }
    }
    return false;
}

@Override
public void start() {
    start(false);
}

private void start(boolean playBackwards) {
    if (Looper.myLooper() == null) {
        throw new AndroidRuntimeException("Animators may only be run on Looper threads");
    }
    mReversing = playBackwards;
    // Special case: reversing from seek-to-0 should act as if not seeked at all.
    if (playBackwards && mSeekFraction != -1 && mSeekFraction != 0) {
        if (mRepeatCount == INFINITE) {
            // Calculate the fraction of the current iteration.
            float fraction = (float) (mSeekFraction - Math.floor(mSeekFraction));
            mSeekFraction = 1 - fraction;
        } else {
            mSeekFraction = 1 + mRepeatCount - mSeekFraction;
        }
    }
    mStarted = true;
    mPaused = false;
    mRunning = false;
    mAnimationEndRequested = false;
    // Resets mLastFrameTime when start() is called, so that if the animation was running,
    // calling start() would put the animation in the
    // started-but-not-yet-reached-the-first-frame phase.
    mLastFrameTime = 0;
    AnimationHandler animationHandler = AnimationHandler.getInstance();
    animationHandler.addAnimationFrameCallback(this, (long) (mStartDelay * sDurationScale));

    if (mStartDelay == 0 || mSeekFraction >= 0) {
        // If there's no start delay, init the animation and notify start listeners right away
        // to be consistent with the previous behavior. Otherwise, postpone this until the first
        // frame after the start delay.
        startAnimation();
        if (mSeekFraction == -1) {
            // No seek, start at play time 0. Note that the reason we are not using fraction 0
            // is because for animations with 0 duration, we want to be consistent with pre-N
            // behavior: skip to the final value immediately.
            setCurrentPlayTime(0);
        } else {
            setCurrentFraction(mSeekFraction);
        }
    }
}

public void setCurrentFraction(float fraction) {
    initAnimation();
    fraction = clampFraction(fraction);
    long seekTime = (long) (getScaledDuration() * fraction);
    long currentTime = AnimationUtils.currentAnimationTimeMillis();
    mStartTime = currentTime - seekTime;
    mStartTimeCommitted = true; // do not allow start time to be compensated for jank
    if (!isPulsingInternal()) {
        // If the animation loop hasn't started, the startTime will be adjusted in the first
        // frame based on seek fraction.
        mSeekFraction = fraction;
    }
    mOverallFraction = fraction;
    final float currentIterationFraction = getCurrentIterationFraction(fraction);
    animateValue(currentIterationFraction);
}

@CallSuper
void animateValue(float fraction) {
    fraction = mInterpolator.getInterpolation(fraction);
    mCurrentFraction = fraction;
    int numValues = mValues.length;
    for (int i = 0; i < numValues; ++i) {
        mValues[i].calculateValue(fraction);
    }
    if (mUpdateListeners != null) {
        int numListeners = mUpdateListeners.size();
        for (int i = 0; i < numListeners; ++i) {
            mUpdateListeners.get(i).onAnimationUpdate(this);
        }
    }
}

public Object getValue(float fraction) {
    // Special-case optimization for the common case of only two keyframes
    if (mNumKeyframes == 2) {
        if (mInterpolator != null) {
            fraction = mInterpolator.getInterpolation(fraction);
        }
        return mEvaluator.evaluate(fraction, mFirstKeyframe.getValue(),
                mLastKeyframe.getValue());
    }
    if (fraction <= 0f) {
        final Keyframe nextKeyframe = mKeyframes.get(1);
        final TimeInterpolator interpolator = nextKeyframe.getInterpolator();
        if (interpolator != null) {
            fraction = interpolator.getInterpolation(fraction);
        }
        final float prevFraction = mFirstKeyframe.getFraction();
        float intervalFraction = (fraction - prevFraction) /
            (nextKeyframe.getFraction() - prevFraction);
        return mEvaluator.evaluate(intervalFraction, mFirstKeyframe.getValue(),
                nextKeyframe.getValue());
    } else if (fraction >= 1f) {
        final Keyframe prevKeyframe = mKeyframes.get(mNumKeyframes - 2);
        final TimeInterpolator interpolator = mLastKeyframe.getInterpolator();
        if (interpolator != null) {
            fraction = interpolator.getInterpolation(fraction);
        }
        final float prevFraction = prevKeyframe.getFraction();
        float intervalFraction = (fraction - prevFraction) /
            (mLastKeyframe.getFraction() - prevFraction);
        return mEvaluator.evaluate(intervalFraction, prevKeyframe.getValue(),
                mLastKeyframe.getValue());
    }
    Keyframe prevKeyframe = mFirstKeyframe;
    for (int i = 1; i < mNumKeyframes; ++i) {
        Keyframe nextKeyframe = mKeyframes.get(i);
        if (fraction < nextKeyframe.getFraction()) {
            final TimeInterpolator interpolator = nextKeyframe.getInterpolator();
            final float prevFraction = prevKeyframe.getFraction();
            float intervalFraction = (fraction - prevFraction) /
                (nextKeyframe.getFraction() - prevFraction);
            // Apply interpolator on the proportional duration.
            if (interpolator != null) {
                intervalFraction = interpolator.getInterpolation(intervalFraction);
            }
            return mEvaluator.evaluate(intervalFraction, prevKeyframe.getValue(),
                    nextKeyframe.getValue());
        }
        prevKeyframe = nextKeyframe;
    }
    // shouldn't reach here
    return mLastKeyframe.getValue();
}

private void setupValue(Object target, Keyframe kf) {
    if (mProperty != null) {
        Object value = convertBack(mProperty.get(target));
        kf.setValue(value);
    } else {
        try {
            if (mGetter == null) {
                Class targetClass = target.getClass();
                setupGetter(targetClass);
                if (mGetter == null) {
                    // Already logged the error - just return to avoid NPE
                    return;
                }
            }
            Object value = convertBack(mGetter.invoke(target));
            kf.setValue(value);
        } catch (InvocationTargetException e) {
            Log.e("PropertyValuesHolder", e.toString());
        } catch (IllegalAccessException e) {
            Log.e("PropertyValuesHolder", e.toString());
        }
    }
}