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import com.mytoutou.cehua.ResourceTable;import ohos.agp.animation.Animator;import ohos.agp.animation.AnimatorProperty;import ohos.agp.components.*;import ohos.multimodalinput.event.TouchEvent;import java.util.Random;public class MainPageListener implements Component.TouchEventListener {    private DirectionalLayout page;    private float lastY;    private float lastX;    private float currentY;    private float currentX;    private int pointId;    private float distance;    public MainPageListener(DirectionalLayout page) {        this.page = page;    }    @Override    public boolean onTouchEvent(Component component, TouchEvent ev) {        int action = ev.getAction();        switch (action) {            case TouchEvent.PRIMARY_POINT_DOWN:                pointId = ev.getPointerId(ev.getIndex());                lastY = currentY = ev.getPointerPosition(pointId).getY();                lastX = currentX = ev.getPointerPosition(pointId).getX();                //取中心---显示                //创建一个点赞装下love的容器，在里面放一张love图片                DirectionalLayout love = new DirectionalLayout(page.getContext());                love.setWidth(200);                love.setHeight(200);                Image image = new Image(page.getContext());                image.setWidth(200);                image.setHeight(200);                image.setPixelMap(ResourceTable.Media_dz_heart_1);                love.addComponent(image);                StackLayout pageStack = (StackLayout) page.findComponentById(ResourceTable.Id_page_a_stack);                pageStack.addComponent(love);                //随机左右倾斜一个角度--->向倾斜的方向移动并且移动过放大逐渐淡化消失                //爱心所在的位置                love.setContentPosition(lastX, lastY);                //(1)、第一种方式                float v = getRandomRotateValue(-35F, -25F, -0F, 25F, 35F);                //创建一个属性动画                AnimatorProperty animatorProperty = new AnimatorProperty();                //属性动画塞入需要执行的动画内容                animatorProperty.setTarget(love);                animatorProperty.setStateChangedListener(new Animator.StateChangedListener() {                    @Override                    public void onStart(Animator animator) {                    }                    @Override                    public void onStop(Animator animator) {                    }                    @Override                    public void onCancel(Animator animator) {                    }                    @Override                    public void onEnd(Animator animator) {                        //动画结束之后将其移除掉                        pageStack.removeComponent(love);                    }                    @Override                    public void onPause(Animator animator) {                    }                    @Override                    public void onResume(Animator animator) {                    }                });                animatorProperty.rotate(v)//每次随机旋转的角度                        .setDuration(800)//动画持续800ms(毫秒)                        .scaleX(2.5F)//向x轴放大2.5倍                        .scaleY(2.5F)//向y轴放大2.5倍                        .moveByY(-300)//向上是负值，向下是正值---移动x个像素                        .alpha(0)                        .start();//这个线性函数---理解渐渐消失                //(1)、第一种方式                break;            case TouchEvent.POINT_MOVE:                currentY = ev.getPointerPosition(pointId).getY();                distance = currentY - lastY;                page.setMarginBottom(page.getMarginBottom() + (int) distance);                break;            case TouchEvent.PRIMARY_POINT_UP:                break;        }        return true;    }    //随机1-5个数的角度    private float getRandomRotateValue(float... rotate) {        Random r = new Random();        int a = r.nextInt(4) + 1;        return randomZF() == 0 ? rotate[a] : -rotate[a];    }    //随机0或1是为了取角度正负数    private float randomZF() {        return new java.util.Random().nextBoolean() ? 1 : 0;    }}