【译】Activity分割动画如何使用我的动画##

View root = currActivity.getWindow().getDecorView().findViewById(android.R.id.content);
root.setDrawingCacheEnabled(true);
mBitmap = root.getDrawingCache();

Bitmap mBmp1 = Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), splitYCoord);
Bitmap mBmp2 =Bitmap.createBitmap(bmp, 0, splitYCoord, bmp.getWidth(), bmp.getHeight() - splitYCoord);

ImageView imageView = new ImageView(destActivity);
imageView.setImageBitmap(bmp);

WindowManager.LayoutParams windowParams = new WindowManager.LayoutParams();
windowParams.gravity = Gravity.TOP;
windowParams.x = loc[0];
windowParams.y = loc[1];
windowParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
windowParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
windowParams.flags =WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
windowParams.format = PixelFormat.TRANSLUCENT;
windowParams.windowAnimations = 0;
destActivity.getWindowManager().addView(imageView, windowParams);

mSetAnim = new AnimatorSet();
mTopImage.setLayerType(View.LAYER_TYPE_HARDWARE, null);
mBottomImage.setLayerType(View.LAYER_TYPE_HARDWARE, null);
mSetAnim.addListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationEnd(Animator animation) {
                        clean(destActivity);
                    }

                    @Override
                    public void onAnimationCancel(Animator animation) {
                        clean(destActivity);
                    }
            ...
                });

// Animating the 2 parts away from each other
Animator anim1 = ObjectAnimator.ofFloat(mTopImage, translationY, mTopImage.getHeight() * -1);
Animator anim2 = ObjectAnimator.ofFloat(mBottomImage, translationY, mBottomImage.getHeight());

mSetAnim.setDuration(duration);
mSetAnim.playTogether(anim1, anim2);
mSetAnim.start();

/**
   * Utility class to create a split activity animation
   *
   * @author Udi Cohen (@udinic)
   */
  public class ActivitySplitAnimationUtil {

    /**
     * Start a new Activity with a Split animation
     *
     * @param currActivity The current Activity
     * @param intent The Intent needed tot start the new Activity
     * @param splitYCoord The Y coordinate where we want to split the Activity on the animation. -1
     * will split the Activity equally
     */
    public static void startActivity(Activity currActivity, Intent intent, int splitYCoord);

    /**
     * Start a new Activity with a Split animation right in the middle of the Activity
     *
     * @param currActivity The current Activity
     * @param intent The Intent needed tot start the new Activity
     */
    public static void startActivity(Activity currActivity, Intent intent);

    /**
     * Preparing the graphics on the destination Activity.
     * Should be called on the destination activity on Activity#onCreate() BEFORE setContentView()
     *
     * @param destActivity the destination Activity
     */
    public static void prepareAnimation(final Activity destActivity);

    /**
     * Start the animation the reveals the destination Activity
     * Should be called on the destination activity on Activity#onCreate() AFTER setContentView()
     *
     * @param destActivity the destination Activity
     * @param duration The duration of the animation
     * @param interpolator The interpulator to use for the animation. null for no interpulation.
     */
    public static void animate(final Activity destActivity, final int duration,
        final TimeInterpolator interpolator);

    /**
     * Start the animation that reveals the destination Activity
     * Should be called on the destination activity on Activity#onCreate() AFTER setContentView()
     *
     * @param destActivity the destination Activity
     * @param duration The duration of the animation
     */
    public static void animate(final Activity destActivity, final int duration);

    /**
     * Cancel an in progress animation
     */
    public static void cancel();
  }

ActivitySplitAnimationUtil.startActivity(Activity1.this, new Intent(Activity1.this, Activity2.class));

// Preparing the 2 images to be split
ActivitySplitAnimationUtil.prepareAnimation(this);

// Setting the Activity's layout
setContentView(R.layout.act_two);

// Animating the items to be open, revealing the new activity.
// Animation duration of 1 second
ActivitySplitAnimat