EffectDemo/app/src/main/java/com/xunao/effectdemo/activity/QuxianActivity.java

package com.xunao.effectdemo.activity;

import android.animation.Animator;
import android.animation.ValueAnimator;
import android.app.Activity;
import android.graphics.Path;
import android.graphics.PathMeasure;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.RelativeLayout;

import androidx.annotation.Nullable;

import com.xunao.effectdemo.R;

/**
 * author : 程中强
 * e-mail : 740479946@qq.com
 * date : 2022/8/1016:44
 * desc :
 * version: 1.0
 */
public class QuxianActivity extends Activity {

	private View view,view2;
	private RelativeLayout rl;
	private Button btn;
	private float[] mCurrentPosition = new float[2];
	@Override
	protected void onCreate(@Nullable Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_quxian);
		init();
	}

	void init(){
		view = findViewById(R.id.view);
		view2= findViewById(R.id.view2);

		rl = findViewById(R.id.rl);
		AnimationSet aset_4=new AnimationSet(true);
		TranslateAnimation aa_4=new TranslateAnimation(Animation.RELATIVE_TO_PARENT,0,Animation.RELATIVE_TO_PARENT, -0.5f,
				Animation.RELATIVE_TO_PARENT, 0,Animation.RELATIVE_TO_PARENT, 0.5f);
		aa_4.setDuration(2000);
		aset_4.addAnimation(aa_4);
		aset_4.setFillAfter(false);
//		view.startAnimation(aset_4);

		view.setOnClickListener(v->{
			bse();
		});

		btn =findViewById(R.id.btn);
		btn.setOnClickListener(v->{
			bse();
		});

//		new Thread(new Runnable() {
//			@Override
//			public void run() {
//				try {
//					Thread.sleep(300);
//					bse();
//				} catch (InterruptedException e) {
//					e.printStackTrace();
//				}
//			}
//		}).start();
		bse();
	}

	void bse(){

		AnimationSet aset_2=new AnimationSet(true);
		RotateAnimation aa_2=new RotateAnimation(0,360,
				Animation.RELATIVE_TO_SELF,0.5f,
				Animation.RELATIVE_TO_SELF,0.5f);
		aa_2.setDuration(2000);
		aset_2.setRepeatCount(-1);
		aset_2.addAnimation(aa_2);

		int startA[] = new int[2];
		view.getLocationInWindow(startA);
		Log.e("MyTag","startA:"+startA[0]+"  "+startA[1]);
		int endB[] = new int[2];
		view2.getLocationInWindow(endB);
		Log.e("MyTag","endB:"+endB[0]);
		int parentC[] = new int[2];
		rl.getLocationInWindow(parentC);
		Log.e("MyTag","parentC:"+rl.getHeight()+"   "+ (float)rl.getWidth());
		float startX = 200;
		float startY = -100 ;
		//商品终点坐标：购物车起始点-父布局起始点
		float toX = 10;
		float toY = 350  ;
		// 四、计算中间动画的插值坐标（贝塞尔曲线）（其实就是用贝塞尔曲线来完成起终点的过程）
		//开始绘制贝塞尔曲线
		Path path = new Path();
		//移动到起始点（贝塞尔曲线的起点）
		path.moveTo(500, -200);
		//使用二次萨贝尔曲线：注意第一个起始坐标越大，贝塞尔曲线的横向距离就会越大，一般按照下面的式子取即可
		path.quadTo(350, 150, -50, 200);
		//mPathMeasure用来计算贝塞尔曲线的曲线长度和贝塞尔曲线中间插值的坐标，
		// 如果是true，path会形成一个闭环
		final PathMeasure mPathMeasure = new PathMeasure(path, false);
		//★★★属性动画实现（从0到贝塞尔曲线的长度之间进行插值计算，获取中间过程的距离值）
		ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, mPathMeasure.getLength());
		valueAnimator.setDuration(1200);
		// 匀速线性插值器
		valueAnimator.setInterpolator(new LinearInterpolator());
		valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
			@Override
			public void onAnimationUpdate(ValueAnimator animation) {
				// 这里这个值是中间过程中的曲线长度（下面根据这个值来得出中间点的坐标值）
				float value = (Float) animation.getAnimatedValue();
				// ★★★★★获取当前点坐标封装到mCurrentPosition
				// 离的坐标点和切线，pos会自动填充上坐标，这个方法很重要。
				mPathMeasure.getPosTan(value, mCurrentPosition, null);//mCurrentPosition此时就是中间距离点的坐标值
				Log.e("MyTag","获取坐标:"+mCurrentPosition[0]);

				view2.setTranslationX(mCurrentPosition[0]);
				view2.setTranslationY(mCurrentPosition[1]);
				// 此处为设置旋转的代码
//				view2.setRotation((float) ((500-mCurrentPosition[1])/580)*360);


			}
		});
		//五、 开始执行动画
		valueAnimator.setObjectValues(aa_2);
		valueAnimator.start();

//		view2.startAnimation(aset_2);
		//六、动画结束后的处理
		valueAnimator.addListener(new Animator.AnimatorListener() {
			@Override
			public void onAnimationStart(Animator animation) {
			}
			//当动画结束后：
			@Override
			public void onAnimationEnd(Animator animation) {
				view2.clearAnimation();
				// 购物车的数量加1
//				count++;
//				tvGoodNum.setText(count+"");
//				// 把移动的图片imageview从父布局里移除
//				rl.removeView(imageView);
//				// 开始一个放大动画
//				Animation scaleAnim = AnimationUtils.loadAnimation(FoodActivity2.this, R.anim.shop_scale);
//				ivGoodsCar.startAnimation(scaleAnim);
			}
			@Override
			public void onAnimationCancel(Animator animation) {
			}
			@Override
			public void onAnimationRepeat(Animator animation) {
			}
		});
	}


}