Android在自定义视图上绘制只有一侧曲线的矩形

Question

我需要这个形状（矩形或任何方式）在View android 上绘制。只有一个曲线侧。 1 纯色，弯曲侧透明。这个怎么画？

public class CurveView extends View {
     @Override
     protected void onDraw(Canvas canvas) {
         // how to ????
     }
}

像这样：

谢谢。

Answer 1

解决方案：

更新：

public class MyView extends View {

    private Paint paint;
    private Path path;

    public MyView(Context context) {
        super(context);
        init();
    }

    public void init() {

        path = new Path();

        paint = new Paint();
        paint.setAntiAlias(true);
        paint.setDither(true);
        paint.setStyle(Paint.Style.FILL);
        paint.setColor(Color.RED);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);

        canvas.drawColor(Color.TRANSPARENT);
        paint.setShader(null);

        float width = getWidth();
        float height = getHeight();

        path.moveTo(0, 0);

        path.lineTo(0, height);

        path.lineTo(width, height);

        path.lineTo(width, 0);

        path.cubicTo(4*width/6, 3*height/4, 2*width/6, 3*height/4, 0, 0);

        paint.setColor(Color.RED);
        paint.setStyle(Paint.Style.FILL);
        canvas.drawPath(path, paint);

    }

}