Android 求物品加入购物车的特效代码，或者相关的例子。

求 用户点击加入购物车时，出现的一个“物品飞入购物车”的特效 ，或者 是小红点的方式，飞入购物车。

类似美团外卖，爱鲜蜂 ，百度外卖 等APP的 购物车加入特效。谢谢各位了

求各位如果有，请提供一下相关的帖子地址，或者代码。谢谢了

可以用PathMeasure控制做Path动画

没有相关的代码例子吗？请问

package com.chenfangyi.ui;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.FrameLayout;

import com.chenfangyi.util.ImageRectUtils;

import java.util.ArrayList;
import java.util.Random;

/**

• Created by chenfangyi on 16-6-8.
  */
  public class ScreenFlowView extends View {

  private boolean mInit;

  //相对于把屏幕的绝对位置
  private RectF mRectF;

  //画笔
  private Paint mCirclePaint;

  private InvalidateObserver mObserver;

  private ArrayList mAnimationViews;

  private Random mRandom;

  public ScreenFlowView(Context context) {
  this(context, null);
  }

  public ScreenFlowView(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
  }

  public ScreenFlowView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  init();
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  }

  @Override
  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
  super.onLayout(changed, left, top, right, bottom);
  if(changed){
  doInit(ImageRectUtils.getViewRect(this));
  }
  }

  @Override
  protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  if(mInit){
  int length = mAnimationViews.size();
  for(int i = 0 ; i < length ; i++){
  IAnimation iAnimation = mAnimationViews.get(i);
  iAnimation.draw(canvas, mCirclePaint);
  }
  }
  }

  private void init(){
  mRandom = new Random();
  mRectF = new RectF();
  mCirclePaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.FILTER_BITMAP_FLAG);
  mCirclePaint.setColor(Color.BLUE);
  mCirclePaint.setStyle(Paint.Style.FILL);

  mObserver = new InvalidateObserver() {
      @Override
      public void onInvalidate(IAnimation animation) {
          postInvalidate();
      }
  
      @Override
      public void onAnimationStart(IAnimation animation) {
          postInvalidate();
      }
  
      @Override
      public void onAnimationEnd(IAnimation animation) {
          mAnimationViews.remove(animation);
          System.out.println("onAnimationEnd remove");
      }
  };
  mAnimationViews = new ArrayList<>();
  

  }

  private void doInit(RectF rectF){
  if(!mInit || !mRectF.equals(rectF)){
  mRectF.set(rectF);
  RectF dstRect = new RectF(mRectF);
  dstRect.offset(-mRectF.left, -mRectF.top);
  mInit = true;
  }
  }

  /**

  • 启动动画
  • @param start
  • @param end
  • @param bitmap

  • @param duration
    */
    public void beginAnimation(PointF start, PointF end, Bitmap bitmap, int duration){
    if(mInit) {
    int i = mRandom.nextInt(2);
    IAnimation animation;
    if(i == 0){
    animation = new SinglePathView(mObserver);
    } else{
    animation = new BigPathView(mObserver);
    }
    mAnimationViews.add(animation);
    animation.beginAnimation(start, end, bitmap, duration);

    }
    }

  /**

  • 挂载到某个Activity的最顶层
  • @param activity */ public void attachToActivity(Activity activity) { //防止已经加入了报错 removeFromPreviousParent(); FrameLayout decor = (FrameLayout)activity.getWindow().getDecorView(); FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams( FrameLayout.LayoutParams.FILL_PARENT, FrameLayout.LayoutParams.FILL_PARENT); decor.addView(this, lp); }

  public void deattach(Activity activity) {
  FrameLayout decor = (FrameLayout)activity.getWindow().getDecorView();
  decor.removeView(this);
  }

  private void removeFromPreviousParent() {
  ViewParent parent = getParent();
  if(parent != null && parent instanceof ViewGroup) {
  ViewGroup parentView = (ViewGroup) parent;
  parentView.removeView(this);
  }
  }

  public static interface InvalidateObserver{
  void onInvalidate(IAnimation animation);
  void onAnimationStart(IAnimation animation);
  void onAnimationEnd(IAnimation animation);
  }
  }

package com.chenfangyi.ui;

import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PathMeasure;
import android.graphics.PointF;
import android.graphics.RectF;
import android.view.animation.AccelerateDecelerateInterpolator;

/**

• Created by chenfangyi on 16-6-8.
  */
  public class SinglePathView implements IAnimation{

  private RectF mTempRect;

  private Bitmap mBitmap;

  private Path mPath;

  private ObjectAnimator mAnimator;

  private float mLength;

  private float mProgress;

  //测量路径的坐标位置
  private PathMeasure mPathMeasure;

  private boolean isAnimationNow;

  private ScreenFlowView.InvalidateObserver mObserver;

  public SinglePathView(ScreenFlowView.InvalidateObserver observer){
  mObserver = observer;
  mTempRect = new RectF();
  mPath = new Path();
  mPathMeasure = new PathMeasure();

  mAnimator = ObjectAnimator.ofFloat(this, "progress", 0, 1);
  mAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
  mAnimator.addListener(new Animator.AnimatorListener() {
      @Override
      public void onAnimationStart(Animator animation) {
          isAnimationNow = true;
          if(mObserver != null){
              mObserver.onAnimationStart(SinglePathView.this);
          }
      }
  
      @Override
      public void onAnimationEnd(Animator animation) {
          isAnimationNow = false;
          if(mObserver != null){
              mObserver.onAnimationEnd(SinglePathView.this);
          }
      }
  
      @Override
      public void onAnimationCancel(Animator animation) {
          isAnimationNow = false;
          if(mObserver != null){
              mObserver.onAnimationEnd(SinglePathView.this);
          }
      }
  
      @Override
      public void onAnimationRepeat(Animator animation) {
  
      }
  });
  

  }

  @Override
  public void beginAnimation(PointF start, PointF end, Bitmap bitmap, int duration){
  mBitmap = bitmap;
  setProgress(0);
  mPath.reset();

  mPath.moveTo(start.x, start.y);
  

  // mPath.cubicTo(start.x, start.y, end.x, start.y, end.x, end.y);
  mPath.cubicTo(start.x, start.y, start.x * 2 / 3 + end.x / 3, start.y - end.y / 2, end.x, end.y);
  mPathMeasure.setPath(mPath, false);
  mLength = mPathMeasure.getLength();

  mAnimator.cancel();
  mAnimator.setDuration(duration).start();
  

  }

  @Override
  public void recycle(){
  mBitmap = null;
  }

  @Override
  public void draw(Canvas canvas, Paint paint){
  if(isAnimationNow && mBitmap != null) {
  float pos[] = new float[2];
  mPathMeasure.getPosTan(mLength * mProgress, pos, null);
  if (mBitmap != null) {
  mTempRect.set(pos[0] - 50, pos[1] - 50, pos[0] + 50, pos[1] + 50);
  canvas.drawBitmap(mBitmap, null, mTempRect, null);
  } else {
  canvas.drawCircle(pos[0], pos[1], 50, paint);
  }
  }
  }

  public float getProgress() {
  return mProgress;
  }

  public void setProgress(float progress) {
  this.mProgress = progress;
  if(mObserver != null){
  mObserver.onInvalidate(SinglePathView.this);
  }
  }
  }

package com.chenfangyi.ui;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PointF;

/**

• Created by chenfangyi on 16-6-8. */ public interface IAnimation { public void beginAnimation(PointF start, PointF end, Bitmap bitmap, int duration); public void draw(Canvas canvas, Paint paint); public void recycle(); }

用法：
mFlowView.beginAnimation(start, end, huocheBitmap, 1000);

你好。请问有没有Demo 之类的。因为我发现 代码中 还少一些类：比如 ImageRectUtils 。。。

仿天猫抛物线加入购物车特效代码
http://download.csdn.net/detail/kcc55x/9545853