Java 如何在android中沿路径设置视图动画？

我想为我在“MyView”类中绘制的六边形设置动画。我想创建一条路径，并能够沿着该路径设置动画

了解这个问题的一些先兆。我在MyView类中有

xPropertyName

和

yPropertyName

的getter和setter。setter不会主动更改MyView类中的onDraw方法。我不确定这是否是问题所在

我已尝试执行moveTo（）、lineTo（）、setLastPoint（）等操作（可能不正确），以获得正确位置的路径

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我还阅读了和问题，除了调用预设方法和使用我的视图类之外，我不想重写任何方法或做任何复杂的事情。我只想让十六进制对象沿着路径移动

我想知道原因是否是MyView的onDraw方法中没有更新“startX”和“startY”。但是，没有关于这方面的文件

        float xCenter = PHONE_DIMS.x / 2;
        float yOffset = PHONE_DIMS.y / 3;

        MyView hex = new MyView(this, yellow, 10,10, 90);
        doodleView.addView(hex);

        Path hexPath = new Path();

        hexPath.moveTo(10,10);
        hexPath.lineTo(10,PHONE_DIMS.y *4/5);
        hexPath.moveTo(10, PHONE_DIMS.y *4/5);

        ObjectAnimator hexAn = ObjectAnimator.ofFloat(hex,"startX","startY",hexPath);

        OvershootInterpolator interpolator = new OvershootInterpolator();
        hexAn.setInterpolator(interpolator);
        hexAn.setDuration(5000);
        hexAn.start();

//Below is MyView just for context


public class MyView extends DrawView {
    private float size,x,y;
    /**
     * Constructor for a basic Draw View
     *
     * @param context The Context the view is running in, through which it can access the current theme, resources, etc.
     * @param brush   A paint object for styling when drawing
     */
    public MyView(Context context, Paint brush, float startX, float startY, float size) {
        super(context, brush);
        setStartX(startX);
        setStartY(startY);
        this.setSize(DimHelp.DP2PX(size,context));
        initFromParentCoordsPX(
                DimHelp.DP2PX(getX(),context),
                DimHelp.DP2PX(getY(),context),
                DimHelp.DP2PX(size + getX(), context),
                DimHelp.DP2PX(size + getY(), context)
        );

    }

    /**
     * Draw something on the Canvas
     * @param canvas the canvas that is drawn upon
     */
    protected void onDraw(Canvas canvas) {

        Paint myBrush = this.getBrush();
        float comp = myBrush.getStrokeWidth()/2;
        float canWidth = getSize();
        float canHeight = getSize();

        canvas.drawLine(canWidth/3, 0+comp, 2*canWidth/3, 0+comp, myBrush);
        canvas.drawLine(2*canWidth/3, 0+comp, canWidth-comp, canHeight/3, myBrush);
        canvas.drawLine(canWidth-comp, canHeight/3, canWidth-comp, 2*canHeight/3, myBrush);
        canvas.drawLine(canWidth-comp, 2*canHeight/3, 2*canWidth/3, canHeight-comp, myBrush);
        canvas.drawLine(2*canWidth/3, canHeight-comp, canWidth/3, canHeight-comp, myBrush);
        canvas.drawLine(canWidth/3, canHeight-comp, 0+comp, 2*canHeight/3, myBrush);
        canvas.drawLine(0+comp, 2*canHeight/3, 0+comp, canHeight/3, myBrush);
        canvas.drawLine(0+comp, canHeight/3, canWidth/3, 0+comp, myBrush);


    }

    //Getters and setters for the size, x and y variables
    public void setSize(float s) {size = s;}
    public float getSize() {return size;}
    public void setStartX(float ex) {x = ex;}
    public float getX() {return x;}
    public void setStartY(float ey) {y = ey;}
    public float getY() {return y;}
}

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要移动图像，需要设置

x

和

y

属性的动画。修改现有代码，如下所示：

    MyView hex = new MyView(this, yellow, 10,10, 90);
    doodleView.addView(hex);

    Path hexPath = new Path();

    hexPath.moveTo(10,10);
    hexPath.lineTo(10,PHONE_DIMS.y *4/5);
    // you've already moved to this position with the above lineTo() call
    // hexPath.moveTo(10, PHONE_DIMS.y *4/5); 

    // Animate the x and y properties, not startX and startY
    ObjectAnimator hexAn = ObjectAnimator.ofFloat(hex,"x","y",hexPath);

    OvershootInterpolator interpolator = new OvershootInterpolator();
    hexAn.setInterpolator(interpolator);
    hexAn.setDuration(5000);
    hexAn.start();

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可能重复？我不想覆盖任何内容。在这方面，它不是重复的，因为这些答案会覆盖。我已经尝试过了，但不幸的是，它也不起作用。我建议将

MyView

简化，以帮助确定原因，例如，只需绘制一个固定大小的简单正方形，删除那些属性setter/getter

setStartX

，

setStartY

，

getX

，

getY

。那么“x”和“y”的动画能工作吗？