LauncherIcons.java 文件源码

/**
 * Creates a normalized bitmap suitable for the all apps view. The bitmap is also visually
 * normalized with other icons and has enough spacing to add shadow.
 */
public static Bitmap createScaledBitmapWithoutShadow(Drawable icon, Context context, int iconAppTargetSdk) {
    RectF iconBounds = new RectF();
    IconNormalizer normalizer;
    float scale = 1f;
        normalizer = IconNormalizer.getInstance(context);
        if (AndroidVersion.isAtLeastOreo() && iconAppTargetSdk >= Build.VERSION_CODES.O) {
            boolean[] outShape = new boolean[1];
            AdaptiveIconDrawable dr = (AdaptiveIconDrawable)
                    context.getDrawable(R.drawable.adaptive_icon_drawable_wrapper).mutate();
            dr.setBounds(0, 0, 1, 1);
            scale = normalizer.getScale(icon, iconBounds, dr.getIconMask(), outShape);
            if (AndroidVersion.isAtLeastOreo() &&
                    !outShape[0]) {
                Drawable wrappedIcon = wrapToAdaptiveIconDrawable(context, icon, scale);
                if (wrappedIcon != icon) {
                    icon = wrappedIcon;
                    scale = normalizer.getScale(icon, iconBounds, null, null);
                }
            }

    }
    scale = Math.min(scale, ShadowGenerator.getScaleForBounds(iconBounds));
    return createIconBitmap(icon, context, scale);
}