显示平面图，并得到位置与IndoorAtlas

问题描述

有没有关于如何使用IndoorAtlas SDK的任何资源？

Is there any resource on how to use the IndoorAtlas SDK?

我弄不清如何显示的布局规划和获取当前位置。

I'm getting confused about how to show the floorPlan and getting current location.

请好心帮我。

推荐答案

下面是非常大致有：

1）初始化IndoorAtlas例如：

1) Initialize IndoorAtlas instance:

IndoorAtlas ia = IndoorAtlasFactory.createIndoorAtlas(context, listener, apiKey, apiSecret);

2）获得平面图的实例：

2) Obtain instance of FloorPlan:

FutureResult<FloorPlan> result = ia.fetchFloorPlan(floorPlanId);
result.setCallback(new ResultCallback<FloorPlan>() {
            @Override
            public void onResult(final FloorPlan result) {
                mFloorPlan = result;
                loadFloorPlanImage(result);
            }
            // handle error conditions too
}

3）获得实际的图像：

3) Obtain actual image:

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 too
  }
}

4）启动定位：

4) Start positioning:

ia.startPositioning(venueId, floorId, floorPlanId);

5）的平面图显示的位置：

5) Show positions on floor plan:

public void onServiceUpdate(ServiceState state) {

   // get position on original floor plan image
   int i = state.getImagePoint().getI();
   int j = state.getImagePoint().getJ();

   // take into account how your floor plan image has been scaled
   // and draw position
   PointF scaledPoint = new PointF();
   Util.calculateScaledPoint((int) floorPlan.dimensions[0], (int) floorPlan.dimensions[1], i, j, mImageView, scaledPoint);

   drawNewPositionInUiThread(scaledPoint.x, scaledPoint.y);

}

当然你也可以一开始就定位，然后再获得图像。你也可以缓存在本地形象，但像说，这是大致如此。

Of course you can start positioning first and then obtain image. You could also cache image locally but like said, this was roughly how.

Util.java：

Util.java:

public class Utils {


    /**
     * Calculates scaling factor for an image with original dimensions of
     * {@code originalWidth x originalHeight} being displayed with {@code imageView}.
     *
     * The assumption with this example code is that a) layout has been already performed for
     * {@code imageView} and that {@link android.widget.ImageView.ScaleType#CENTER_INSIDE} is used.
     *
     * @param originalWidth  height of the original bitmap to be displayed using {@code imageView}
     * @param originalHeight width of the original bitmap to be displayed using {@code imageView}
     */
    public static float calculateScaleFactor(int originalWidth, int originalHeight,
                                             ImageView imageView) {

        if (imageView.getScaleType() != ImageView.ScaleType.CENTER_INSIDE) {
            throw new IllegalArgumentException("only scale type of CENTER_INSIDE supported, was: "
                    + imageView.getScaleType());
        }

        final int availableX = imageView.getWidth()
                - (imageView.getPaddingLeft() + imageView.getPaddingRight());
        final int availableY = imageView.getHeight()
                - (imageView.getPaddingTop() + imageView.getPaddingBottom());

        if (originalWidth > availableX || originalHeight > availableY) {
            // original image would not fit without scaling
            return originalWidth > availableX
                    ? availableX / (float) originalWidth
                    : availableY / (float) originalHeight;
        } else {
            return 1f; // no scaling required
        }

    }


    /**
     * Calculates point where to draw coordinates {@code x} and {@code y} in a bitmap that's
     * original dimensions were {@code originalWidth x originalHeight} and may now be scaled down
     * as it's been displayed with {@code imageView}.
     *
     * @param originalWidth  width of the original bitmap before any scaling
     * @param originalHeight height of the original bitmap before any scaling
     * @param x              x-coordinate on original bitmap
     * @param y              y-coordinate on original bitmap
     * @param imageView      view that will be used to display bitmap
     * @param point          point where result value is to be stored
     * @see #calculateScaleFactor(int, int, ImageView)
     */
    public static void calculateScaledPoint(int originalWidth, int originalHeight,
                                            int x, int y,
                                            ImageView imageView,
                                            PointF point) {


        final float scale = calculateScaleFactor(originalWidth, originalHeight, imageView);
        final float scaledWidth = originalWidth * scale;
        final float scaledHeight = originalHeight * scale;

        // when image inside view is smaller than the view itself and image is centered (assumption)
        // there will be some empty space around the image (here offset)
        final float offsetX = Math.max(0, (imageView.getWidth() - scaledWidth) / 2);
        final float offsetY = Math.max(0, (imageView.getHeight() - scaledHeight) / 2);

        point.x = offsetX + (x * scale);
        point.y = offsetY + (y * scale);


    }


}

这篇关于显示平面图，并得到位置与IndoorAtlas的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！