仿抖音视频详情页的红心点赞动效

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ObjectAnimator;
import android.animation.TimeInterpolator;
import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.widget.ImageView;
import android.widget.RelativeLayout;

import com.yibai.svideo.R;

import java.util.Random;

/**
 * zzw：2020/07/03
 * 在点击时将心形的图片 add 到整个 view 中，然后在执行动画
 */

public class LoveAnimator extends RelativeLayout {

  int timeout = 400;//双击间格毫秒延时
  long singleClickTime;//记录第一次点击的时间
  DoubleClickListener mDoubleClickListener;
  SimpleClickListener mSimpleClickListener;

  private Context mContext;
  final float[] num = {-30, -20, 0, 20, 30}; // 随机心形图片的角度

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

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

  public LoveAnimator(Context context, AttributeSet attrs, int defStyleAttr) {
    this(context, attrs, defStyleAttr, 0);
  }

  @SuppressLint("NewApi")
  public LoveAnimator(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
    super(context, attrs, defStyleAttr, defStyleRes);
    initView(context);
  }

  private void initView(Context context) {
    mContext = context;
    singleClickTime = System.currentTimeMillis();
    clickHandler = new Handler();
  }

  @Override
  protected void dispatchDraw(Canvas canvas) {
    super.dispatchDraw(canvas);
    clickCount = 0;//切换新界面时，重置点击次数
  }

  //手指按下的点为(x1, y1)手指离开屏幕的点为(x2, y2)
  float x1 = 0;
  float x2 = 0;
  float y1 = 0;
  float y2 = 0;
  boolean isMove = false;
  private Handler clickHandler;
  private int clickCount = 0;//记录连续点击次数
  @SuppressLi