Create Bitmap Options Using IndoorAtlas

Question

I have some following code :

void loadFloorPlanImage(FloorPlan floorPlan) {
BitmapFactory.Options options = createBitmapOptions(floorPlan);
FutureResult<Bitmap> result = ia.fetchFloorPlanImage(floorPlan, options);
result.setCallback(new ResultCallback<Bitmap>() {
        @Override
        public void onResult(final Bitmap result) {
           // now you have floor plan bitmap, do something with it
           updateImageViewInUiThread(result);
        }
        // handle error conditions
}
}

What i'm getting confused is in line :

BitmapFactory.Options options = createBitmapOptions(floorPlan);

What i'm supposed gonna to do in 'createBitmapOptions' ?

Answer 1

That's not an IndoorAtlas specific question. You can adjust eg the size of the bitmap image to be produced or simply leave the options null. Look at http://developer.android.com/reference/android/graphics/BitmapFactory.html

Sample might look like this if you wanted to restrict the maximum size of the image to be used in your app's map view:

private BitmapFactory.Options createBitmapOptions(FloorPlan floorPlan) {

    int reqWidth = 2048;
    int reqHeight = 2048;

    final int width = (int) floorPlan.dimensions[0];
    final int height = (int) floorPlan.dimensions[1];
    int inSampleSize = 1;

    if (height > reqHeight || width > reqWidth) {

        final int halfHeight = height / 2;
        final int halfWidth = width / 2;

        // Calculate the largest inSampleSize value that is a power of 2 and keeps both
        // height and width larger than the requested height and width.
        while ((halfHeight / inSampleSize) > reqHeight
                && (halfWidth / inSampleSize) > reqWidth) {
            inSampleSize *= 2;
        }

    }

    options.inSampleSize = inSampleSize;
    return options;

}