高級UI特效仿直播點贊效果—一個優美炫酷的點贊動畫

一個優美炫酷的點贊效果

效果圖以下：

攻克難點：

• 心形圖片的路徑等走向
• 心形圖片的控制範圍

部分代碼以下：

經過AbstractPathAnimator定義飄心動畫控制器

@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());//啓動動畫
        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);
    }複製代碼

/**
     * 根據圖片設置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;
    }複製代碼

如何建立一個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;
        //隨機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;
    }複製代碼

Activity中代碼：

項目地址：

github.com/androidstar…

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