将位图图像四舍五入为Google地图标记图标

Question

我有一个地图活动 ，该活动从解析服务器中检索图像和位置并将它们显示为地图上的标记，我想知道是否可以使这些标记变圆而不是矩形。

这是我的代码：

public void getimagesLocation(){

    ParseQuery<ParseObject> query = ParseQuery.getQuery("Image");
    ParseGeoPoint geoPointLocation = new ParseGeoPoint();
    query.whereNear("location", geoPointLocation);

    query.setLimit(100);
    query.findInBackground(new FindCallback<ParseObject>() {
        @Override
        public void done(List<ParseObject> objects, ParseException e) {
            if (e == null) {
                Log.i("imageslocation", "no errors");}
            if (objects.size() > 0) {
                for (ParseObject object : objects) {
                    final ParseGeoPoint point = object.getParseGeoPoint("location");
                    ParseFile file = (ParseFile) object.get("image");
                    file.getDataInBackground(new GetDataCallback() {
                        @Override
                        public void done(byte[] data, ParseException e) {
                            if (e == null && data != null);

                            Bitmap bitmap = BitmapFactory.decodeByteArray(data,0,data.length);
                            Bitmap thumbnail = ThumbnailUtils.extractThumbnail(bitmap,200,200);

                            Double lat = point.getLatitude();
                            Double log = point.getLongitude();

                            LatLng marker = new LatLng(lat, log);

                            mMap.addMarker(new MarkerOptions()
                                    .title("Another Image")
                                    .icon(BitmapDescriptorFactory.fromBitmap(thumbnail))
                                    .position(marker));

                        }});}}}});}

那么，如何使这些标记变圆而不是矩形呢？

Answer 1

我认为问题在于图像资产。 您应该使用透明的* .png图像格式 。

像这样：

Answer 2

好吧，我找到了解决方案，这就是如果有人感兴趣

 public Bitmap getCroppedBitmap(Bitmap bitmap) {
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
            bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff424242;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

    paint.setAntiAlias(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawCircle(bitmap.getWidth() / 2, bitmap.getHeight() / 2,
            bitmap.getWidth() / 2, paint);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);

    return output;
}

然后像这样简单地提取缩略图

Bitmap thumbnail = ThumbnailUtils.extractThumbnail(getCroppedBitmap(bitmap),200,200);