Question

我已经加载了平面图图像并将其转换为位图。我在该平面图上画了一个圆圈。此圆圈显示此用户在平面图上的当前位置。

问题是，当来自服务器的响应缓慢时，在平面图上绘制了多个圆圈

这是我的代码：

 public void onServiceUpdate(ServiceState state) {
 final int i, j;
        i = state.getImagePoint().getI();
        j = state.getImagePoint().getJ();
  ImageView imageView = (ImageView) findViewById(R.id.imageView);
        imageView.buildDrawingCache();
        Bitmap bitmap = imageView.getDrawingCache();
        final ImageView imageFloor = (ImageView) findViewById(R.id.imageView);
        final Bitmap bitmapCircle = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());
        Canvas canvas = new Canvas(bitmapCircle);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setColor(Color.BLUE);
        paint.setStrokeWidth(10);
        canvas.drawBitmap(bitmap, new Matrix(), null);
        canvas.drawCircle(i, j, 10, paint);
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                imageFloor.setImageBitmap(bitmapCircle);
            }
        });

这是从indooratlas服务器调用楼层平面图的方法。

public void loadFloorPlanImage(FloorPlan floorPlan) {
    BitmapFactory.Options options = createBitmapOptions(floorPlan);
    FutureResult<Bitmap> result = mIndoorAtlas.fetchFloorPlanImage(floorPlan,options);
    result.setCallback(new ResultCallback<Bitmap>() {
        @Override
        public void onResult(final Bitmap result) {
            runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    ImageView imageView = (ImageView) findViewById(R.id.imageView);
                    imageView.setImageBitmap(result);
                    log("onResult LoadFloorPlanImage");
                }
            });
        }

是否有任何想法或建议如何清除平面图位图中的圆圈？

Answer 1

你可以这样做：

onServiceUpdate(...){
    final ImageView imageFloor = (ImageView) findViewById(R.id.imageView);
    imageFloor.setVisibility(View.GONE);
    ....
    runOnUiThread(new Runnable() {
        @Override
        public void run() {
             imageFloor.setVisibility(View.VISIBLE);
             imageFloor.setImageBitmap(bitmapCircle);

但你的问题不是很清楚，如果我不明白你的意思，我不会感到惊讶

清除圆形位图

1 个答案: