LogCat未显示命令：Android

Question

以下是onDraw函数的代码。它绘制圆圈并正常运行，但是当我在LOGCAT中输出圆坐标时，我什么也看不见。我导入了＆＃34; android.Util.Log＆＃34;同样， Log.d命令未在Logcat中显示。

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


    int pl = getPaddingLeft();
    int pr = getPaddingRight();
    int pt = getPaddingTop();
    int pb = getPaddingBottom();

    int usableWidth = w - (pl + pr);
    int usableHeight = h - (pt + pb);

    int radius = Math.min(usableWidth, usableHeight) / 2;
    int cx = pl + (usableWidth / 2);
    int cy = pt + (usableHeight / 2);

    paint.setColor(circleColor);
    //canvas.drawCircle(w, h, (radius * 1.5f), paint);
    Log.d("CIRCLE DRAW", "Circle coordinates are as ");//  +
            //"X: "+ w +
            //"Y: "+ h);

}