private static Drawable generateCircleDrawable(final int color) {
ShapeDrawable drawable = new ShapeDrawable(new OvalShape());
drawable.setShaderFactory(
new ShapeDrawable.ShaderFactory() {
@Override
public Shader resize(int width, int height) {
return new LinearGradient(0, 0, 0, 0, color, color, Shader.TileMode.REPEAT);
}
});
return drawable;
}
private Drawable createInnerStrokesDrawable(final int color, float strokeWidth) {
if (!mStrokeVisible) {
return new ColorDrawable(Color.TRANSPARENT);
}
ShapeDrawable shapeDrawable = new ShapeDrawable(new OvalShape());
final int bottomStrokeColor = darkenColor(color);
final int bottomStrokeColorHalfTransparent = halfTransparent(bottomStrokeColor);
final int topStrokeColor = lightenColor(color);
final int topStrokeColorHalfTransparent = halfTransparent(topStrokeColor);
final Paint paint = shapeDrawable.getPaint();
paint.setAntiAlias(true);
paint.setStrokeWidth(strokeWidth);
paint.setStyle(Style.STROKE);
shapeDrawable.setShaderFactory(
new ShaderFactory() {
@Override
public Shader resize(int width, int height) {
return new LinearGradient(
width / 2,
0,
width / 2,
height,
new int[] {
topStrokeColor,
topStrokeColorHalfTransparent,
color,
bottomStrokeColorHalfTransparent,
bottomStrokeColor
},
new float[] {0f, 0.2f, 0.5f, 0.8f, 1f},
TileMode.CLAMP);
}
});
return shapeDrawable;
}