Resize and Crop

[contoystudio]

Hi,
I'd like to know if exist a library/class that permit to crop/resize an image through given proportions. Something like android does when we change background in the homescreen.

Thank you in advance

 

[klaus]

What exactly do you want to do ?
You can 'play' with Gravity or
you can use a canvas to copy parts of a given bitmap.

Best regards.

 

[contoystudio]

I'd like to do exactly what android (or apps like instagram) does when you pick an image from gallery and want set it as bg image (or want to share it in instagram): they force you to crop that image, for example instagram wants only square images.
Instagram screen shot: http://cdn.guidingtech.com/assets/postimages/2012/04/Instagram-for-Android-crop-image.png

I'm trying to do io manually with panel's touch event, but it's a little complex and I'd like to know if someone already done this job.

Thanks

[Edit: something like this https://github.com/lorensiuswlt/AndroidImageCrop]

 

[klaus]

I haven't done this.
But it shouldn't be that complicated.
- display the original image
- define the crop rectangle in a panel
- copy the croped image to a bitmap
- copy the bitmap to a file

Best regards.

 

[contoystudio]

Ok thank you.
The most complex part for me is to implement the dynamic crop rectangle. Im using a moveable panel and other 4 small panel on its borders for resizing it, with the touch event. Im on the right way?

 

[klaus]

I would probably do with a transparent panel on top, use it's touch event to move the edges of the crop rectangle doing all this graphicaly.
If you want you can post your code and I'll have a look at it.

Best regards.

 

[contoystudio]

Now i have a panel on top, but i have other 4 small panel for resize it, cause in the touch event of the panel i put coding for moving it, not resizing. The other 4 small panels have coding for resizing. Is there another way to do this without these 4 small panels? I will post my test code asap.

Sorry for bad english if you cant understand, im from italy. Thank you very much for your help.

[Edit: Project attached, is only a test for the dynamic crop/resize rect. There are still some bugs, i'm working on it.]

 

[klaus]

I have begun to look at your project but not finished yet.
This afternoon I'm leaving my home for a few days to the mountains for hiking till the end of the week.
I'll come back when I get home.

Best regards.

 

[contoystudio]

No prob, enjoy your trip.
Thank you.

 

[klaus]

Hi,

I'm back home.

I joined a picture from my hike on Tuesday above the Aletsch glacier.

Attached you find my vision of resizing an image.
I haven't tested all possible configurations.
There is no graphics showing what function is active but could be added.

Best regards.

 

[contoystudio]

Hi,

I'm back home.

I joined a picture from my hike on Tuesday above the Aletsch glacier.

Attached you find my vision of resizing an image.
I haven't tested all possible configurations.
There is no graphics showing what function is active but could be added.

Best regards.

Thank you very much.
It's perfect, only one question:
How can i add a marker on angles?

Thanks.

 

[klaus]

Here you are.
Added squares at the angles.

Best regards.

 

[vb1992]

That was a neat approach Klaus
I played with it also and had some fun with cropping

 

[klaus]

Could you share your code ?

Best regards.

 

[vb1992]

code is @home
Yes, I can post it when I get home from my office

 

[vb1992]

Here is the modified code

 

[klaus]

Thanks.

Best regards.

 

[cmartins]

I am trying to change some things in the code but I cannot move the imageviews or change the size. How can I use the drawbitmap in different imageview sizes?

 

[klaus]

Sorry, but I don't understand what exactly you want to do.

Best regards.

 

[Douglas Farias]

how can i set a minimal value at the crop examples?