Android Question Scaling the map image inside WebView obtained from the static map API

webview will fit the image as desired. do you know html code?
there are a number of way to achieve the scaling.

you could also use an image view. the scaling would then be
achieved using b4a code.

if you must use a webview, b4a code can only control the frame
that holds the webview; you need either html or javascript to handle
scaling within the webview itself. you can write html and/or
javascript in b4a code and pass it to webview, but the webview
does the actual scaling. there is a rendering engine inside webview
that draws the page. you need to tell it what you want it to do.

drgottjr said:

webview will fit the image as desired. do you know html code?
there are a number of way to achieve the scaling.

you could also use an image view. the scaling would then be
achieved using b4a code.

if you must use a webview, b4a code can only control the frame
that holds the webview; you need either html or javascript to handle
scaling within the webview itself. you can write html and/or
javascript in b4a code and pass it to webview, but the webview
does the actual scaling. there is a rendering engine inside webview
that draws the page. you need to tell it what you want it to do.

Click to expand...

how could the look code for filling the picture map in image frame. Perhaps then I will have more opportunities to fit the map into image view then use webview.

resizing (or scaling) a bitmap is a solution to a particular problem,
but it can have unpleasant side effects. before resizing, you need
to take into account the dimensions of the bitmap and of the image
view and think about what the result will look like. a large bitmap
greatly reduced or a small bitmap greatly enlarged are unpleasant
to look at.

there are 3 ways to proceed:
1) decide on size of image view and (possibly) resize images to fit.
or
2) use image size to create an image view of that size.
or
3) load a bitmap "sample" to fit a given image view.

these links refer to bitmap scaling
original method:
https://www.b4x.com/android/forum/threads/loadbitmap-loadbitmapresize-loadbitmapsample.82693/

latest:
https://www.b4x.com/android/forum/threads/b4x-b4ximageview-imageview-resize-modes.121359/#content

i am more familiar with the original method, so to fit a large image on your device's screen,
an example might be:

this assumes 2 things:
1) you want to use the full screen to display the bitmap
2) the bitmap is already stored on your device.

if you are downloading a bitmap (eg, with okhttputils2), then when you download the bitmap
(dim downloadedbitmap as bitmap = httpjob.getbitmap), just resize it:
iv.bitmap = downloadedbit.resize(iv.width,iv.height,true)

if the bitmap width and height are both smaller than imageview's width and height, then you
don't need resizing. just set the imageview's bitmap and center the gravity.

Lakhtin_V said:

then I will have more opportunities to fit the map into image view then use webview

Click to expand...

1. You have much more opportunities if NOT using a WEBVIEW.
2. The javascript api (i guess you are using this one) is not a free service. Android Maps Api IS: why not use GoogleMaps instead?

DonManfred said:

1. You have much more opportunities if NOT using a WEBVIEW.
2. The javascript api (i guess you are using this one) is not a free service. Android Maps Api IS: why not use GoogleMaps instead?

Click to expand...

You are right Manfred. It is more convenient to use a ImageView and fill it with data from theWEB - static map API URL