Android 获取自定义视图的InnerShadow

我正在试着做一个定制的计时器 这是我的代码这是完美的 我的问题是我想要内心的阴影

公营天文钟{

private boolean start = false;
private long startTime, elapsedTime;
private float angle = 0f;
private Paint paint, p;
private RectF r;

public CustomChronometer(Context context, AttributeSet attrs) {
    super(context, attrs);
    paint = new Paint();
    paint.setColor(Color.parseColor("#0897ef"));
    paint.setStrokeWidth(25);

    paint.setStyle(Paint.Style.STROKE);

    paint.setAntiAlias(true);

//      paint.setStrokeCap(Cap.ROUND);



}

@SuppressLint("DrawAllocation")
@Override
protected void onLayout(boolean changed, int left, int top, int right,
        int bottom) {
    super.onLayout(changed, left, top, right, bottom);
    r = new RectF(left + 30, top + 30, right - 30, bottom - 30);
}

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

    if (start) {
        elapsedTime = System.currentTimeMillis();
        angle = (elapsedTime - startTime) * 0.006f;
        canvas.drawArc(r, 270f, angle, false, paint);
        if (angle >= 360) {
            startTime = System.currentTimeMillis();
            angle = 0f;
        }
        invalidate();
    }

}

@Override
public void start() {
    super.start();
    start = true;
    startTime = System.currentTimeMillis();
}

@Override
public void stop() {
    super.stop();
    start = false;
}
}

我要求它看起来像这样

paint paint.setColor(Color.parseColor("#0897ef"));
paint.setStrokeWidth(40);
paint.setStyle(Paint.Style.STROKE);
paint.setAntiAlias(true); 
paint.setMaskFilter(new BlurMaskFilter(7, Blur.INNER));

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另外，应该从清单中禁用硬件加速–

你知道这一点吗？我正在尝试添加相同类型的阴影。是的，在paint.setColor（Color.parseColor（“#0897ef”）；paint.setStrokeWidth（40）；paint.setStyle（paint.Style.STROKE）；paint.setAntiAlias（true）；paint.setMaskFilter中尝试此操作（新的BlurMaskFilter（7，Blur.internal））；还应禁用ManifestThank中的硬件加速功能。您应该将此作为答案写入并接受它。：）是的，我稍后再做。。为什么我必须禁用“硬件加速”？不禁用它是否可行？