android load image to maximum allowable size

Question

I am making a drawing app such that user can choose to load pictures from the gallery and further draw on it. However, if the size of the photo is greater than the screen, it can only show part of the picture.

   public void load_pic(String picturePath) // load a picture from gallery
   {
      bitmap = (BitmapFactory.decodeFile(picturePath)).copy(Bitmap.Config.ARGB_8888, true);
      bitmapCanvas = new Canvas(bitmap);
      invalidate();
   }

How could i code such that the picture can either

load in such that can fit either maximium allowable screen width or height, or
load in such that can pull the image to occupy the full screen

Also, running on some device it would give out java.lang.OutOfMemoryError...and it crashed...How could that be tackled?

Many thanks in advance!!

refer this http://stackoverflow.com/a/14117007/1935890 – Dixit Patel Feb 02 '13 at 08:52 — Dixit Patel, Feb 02 '13 at 08:52

score 0 · Accepted Answer · edited May 23 '17 at 10:24

0

First you need to find the screen width and height which you can accomplish by using below code.

Display display = getWindowManager().getDefaultDisplay();
int newWidth = display.getWidth();
int newHeight = display.getHeight();

If you are not in activity you can get the display as describe below,

WindowManager wm = (WindowManager) mContex.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();

You can scale the bitmap using below code.

Bitmap scaled = Bitmap.createScaledBitmap(oldBitmap, newWidth, newHeight, true);

You can also set the height and width at the time of the decoding using, outWidth and outHeight attribute of the BitmapFactory.Options.

And to overcome the outOfMemoryError you can refer the answer pointed in comment.

P.S. I wrote that linked answer.

Hope this will help you.

edited May 23 '17 at 10:24

Community

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answered Feb 02 '13 at 09:03

Moin Ahmed

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thanks for your advice!! yet the panel underlines the getWindowManager() for stating The method getWindowManager() is undefined... =( – pearmak Feb 02 '13 at 09:27
you need to pass the context to access the method if you are not in activity. See the updated answer. – Moin Ahmed Feb 02 '13 at 09:33
thanks!!! but i have changed to be bitmap = Bitmap.createScaledBitmap(bitmap, newWidth, newHeight, true); – pearmak Feb 02 '13 at 10:02
by using this logic, quality of bitmap reduced! – Abdur Rehman Jul 03 '20 at 05:35

android load image to maximum allowable size

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