Android™ Application Development - Bahar Ali Khan

Chapter 11: Advanced Android Development
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PointF rollStringCenter = new PointF(center.x-rollStringWidth / 2,
innerBoundingBox.top+1+textHeight);
canvas.drawText(rollString,
rollStringCenter.x, rollStringCenter.y,
textPaint);
}
// Otherwise draw a marker line
else {
canvas.drawLine(center.x, (int)innerBoundingBox.top,
center.x, (int)innerBoundingBox.top + 5,
markerPaint);
}
canvas.rotate(10, center.x, center.y);
}
canvas.restore();
16. The fi nal step in creating the face is drawing the heading markers around the outside edge.
canvas.save();
canvas.rotate(-1*(bearing), px, py);
double increment = 22.5;
for (double i = 0; i < 360; i += increment)
{
CompassDirection cd = CompassDirection.values()[(int)(i / 22.5)];
String headString = cd.toString();
float headStringWidth = textPaint.measureText(headString);
PointF headStringCenter = new PointF(center.x - headStringWidth / 2,
boundingBox.top + 1 + textHeight);
if (i % increment == 0)
canvas.drawText(headString,
headStringCenter.x, headStringCenter.y,
textPaint);
else
canvas.drawLine(center.x, (int)boundingBox.top,
center.x, (int)boundingBox.top + 3,
markerPaint);
canvas.rotate((int)increment, center.x, center.y);
}
canvas.restore();
17. With the face complete, you get to add some fi nishing touches.
Start by adding a “glass dome” over the top to give the illusion of a watch face. Using the radial
gradient array you constructed earlier, create a new Shader and Paint object. Use them to
draw a circle over the inner face that makes it look like it’s covered in glass.
RadialGradient glassShader = new RadialGradient(px, py,
(int)innerRadius,