aaaliua / myshowhonorsimple

高级UI特效仿直播点赞效果—一个优美炫酷的点赞动画

一个优美炫酷的点赞效果

效果图如下：

攻克难点：

• 心形图片的路径等走向
• 心形图片的控制范围

部分代码如下：

通过AbstractPathAnimator定义飘心动画控制器

   @Override
    public void start(final View child, final ViewGroup parent) {
        parent.addView(child, new ViewGroup.LayoutParams(mConfig.heartWidth, mConfig.heartHeight));
        FloatAnimation anim = new FloatAnimation(createPath(mCounter, parent, 2), randomRotation(), parent, child);
        anim.setDuration(mConfig.animDuration);
        anim.setInterpolator(new LinearInterpolator());//启动动画
        anim.setAnimationListener(new Animation.AnimationListener() {
            @Override
            public void onAnimationEnd(Animation animation) {
                mHandler.post(new Runnable() {
                    @Override
                    public void run() {
                        parent.removeView(child);
                    }
                });
                mCounter.decrementAndGet();
            }

            @Override
            public void onAnimationRepeat(Animation animation) {

            }

            @Override
            public void onAnimationStart(Animation animation) {
                mCounter.incrementAndGet();
            }
        });
        anim.setInterpolator(new LinearInterpolator());
        child.startAnimation(anim);
    }

  /**
     * 根据图片设置bitmap
     * @param color
     * @return
     */
    public Bitmap createHeart(int color) {
        if (sHeart == null) {
            sHeart = BitmapFactory.decodeResource(getResources(), mHeartResId);
        }
        if (sHeartBorder == null) {
            sHeartBorder = BitmapFactory.decodeResource(getResources(), mHeartBorderResId);
        }
        Bitmap heart = sHeart;
        Bitmap heartBorder = sHeartBorder;
        Bitmap bm = createBitmapSafely(heartBorder.getWidth(), heartBorder.getHeight());
        if (bm == null) {
            return null;
        }
        Canvas canvas = sCanvas;
        canvas.setBitmap(bm);
        Paint p = sPaint;
        canvas.drawBitmap(heartBorder, 0, 0, p);
        p.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_ATOP));
        float dx = (heartBorder.getWidth() - heart.getWidth()) / 2f;
        float dy = (heartBorder.getHeight() - heart.getHeight()) / 2f;
        canvas.drawBitmap(heart, dx, dy, p);
        p.setColorFilter(null);
        canvas.setBitmap(null);
        return bm;
    }

如何创建一个path

 public Path createPath(AtomicInteger counter, View view, int factor) {
        Random r = mRandom;
        int x = r.nextInt(mConfig.xRand);
        int x2 = r.nextInt(mConfig.xRand);
        int y = view.getHeight() - mConfig.initY;
        int y2 = counter.intValue() * 15 + mConfig.animLength * factor + r.nextInt(mConfig.animLengthRand);
        factor = y2 / mConfig.bezierFactor;
        //随机xPoint
        int xPointFactor = mRandom.nextInt(mConfig.xPointFactor);
        x = xPointFactor + x;
        x2 = xPointFactor + x2;
        int y3 = y - y2;
        y2 = y - y2 / 2;
        Path p = new Path();
        p.moveTo(mConfig.initX, y);
        p.cubicTo(mConfig.initX, y - factor, x, y2 + factor, x, y2);
        p.moveTo(x, y2);
        p.cubicTo(x, y2 - factor, x2, y3 + factor, x2, y3);
        return p;
    }

Activity中代码：

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