Android高級UI特效仿直播點贊動畫效果

2019-12-12 01:03:38

字體：大中小

來源：轉載

供稿：網友

本文給大家分享高級UI特效仿直播點贊效果―一個優美炫酷的點贊動畫，具體實現代碼大家參考本文。

效果圖如下：

攻克難點：

心形圖片的路徑等走向心形圖片的控制范圍

部分代碼如下：

通過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());//啟動動畫 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); }/** * 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; }

如何創建一個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; }

Activity中代碼：