B4A Library BitmapExtended Library

Hey,

Let's give Basic4Android a boost with a new library: BitmapExtended.
With BitmapExtended, you can do a lot more with your bitmaps:

- Resizing, Scaling, Skewing and translating.
- compressing
- createScaledbitmap
- erasing colours
- get density
- change pixels
- Different ways to create bitmaps
- and a lot more!

Everything is explained in the library.
A sample is delivered.

Cheerz,

Tomas

 

[Jim]

Has anyone used this lib? Without downloading, I'm curious to know what other ways to create bitmaps it provides.

 

[derez]

Thank you Tomas for this contribution, I'm going to try it on some apps, seems promising

 

[derez]

I guess I miss something here:
When I use createbitmap, the object is a bitmap, how can I get its width and height ?
The creating methods all oprate on bitmaps. I would like to have one that create a bitmap out of part of abitmap file directly, without having to load it first to a bitmap (like in jpeg library, which is slow).

 

[agraham]

@Thomas - I don't know if you are doing it on purpose for some reason but all your libraries include the Java source code in the jar which unnecessarily bloats them. You only need to export the generated class files to the jar.

 

[XverhelstX]

mhmm, what do you exactly mean?
I thought I did it always on the correct way.
By doing the following in Eclipse:

1) File -> Export
2) Jar File
3) At the left screen I cross the box next to my project name and at the right side .project and .classpath is automatically checked.
4) I save it to *filepath*/$libraryname*.jar

and I press on Finish.

@Derez. Isn't getHeight and getWidth included?
I should have extracted most of the information here:
Bitmap | Android Developers

Tomas

 

[agraham]

Look at the four checkboxes below the left screen. You only need to select the top one "Export generated class files and resources".

 

[XverhelstX]

Oh I see.
Will this solve any errors or something?

Thanks a lot!

Tomas

 

[agraham]

Will this solve any errors or something?

No. It will just save space in the jars and so in every apk that includes the jars and so save memory space on the device.

 

[ozgureffe]

Hi, and thank you for this library..
I wonder if this library will help us to work with large sized images? Will it be possible to load some part of any image file without loading all bitmap data and touching the Memory Limits?

And there is no explanatory samples with this library. Will you add any sample similar with Agraham's JPEG lib?

 

[derez]

Isn't getHeight and getWidth included?

getwidth(bitmap) returns the width of the argument bitmap. I want to get the width of the bitmap that was created using createbitmap#, and it doesn't make sense to have to use bme.getwidth(bme) instead of bme.width. this property should be inherited from the simple bitmap.

Thanks.

 

[agraham]

bme.getwidth(bme) instead of bme.width

They are the same. This library is very simplistic in that it doesn't extend Bitmap nor does it own and manipulate an internal bitmap, it merely operates on whatever Bitmaps are passed to it so you don't need multiple BitmapExtended objects as they do not represent individual bitmaps. One instance is all you need in an activity.

There really is no point to having getWidth and getHeight in the library as all it does is return the width and height of the Bitmap passed to it which is a bit of a no-operation really. This library would have been better written to extend the normal Bitmap object or recreate it entirely as a proper Basic4android object.

 

[mkvidyashankar]

In the sample there is nothing about the Library except initialization. If it has more sample codes it would be much useful to use this library. Dont mistake me this is only suggestion. I am struggling to get it implemented in my app.

 

[RadCoder]

so far so good

rotatebitmap is a lifesaver, had artefacts with canvas drawrotatedbitmap. Burned hours couldn't fix... tried your lib first go boom. You the man...

 

[RadCoder]

Bug found with RotateBitmap

using rotate bitmap, the output bitmap always varies in size based on the degree of the rotation. For example if a bitmap is 50x50 and you apply rotatebitmap, the resulting rotated bitmap might be 53x53 depending on the degree applied. Could someone confirm my findings. If possible I could review the java source and correct

Thanks again XverhelstX for the lib

 

[RadCoder]

problem found

I looked at the source in the jar, the problem is native to android

Issue 1773 - android - Matrix.postrotate() and others result in scaling of image - Android - An Open Handset Alliance Project - Google Project Hosting

 

[BarrySumpter]

Brilliant!

15 mins and I'm rotating!

Thank you!

This lib makes it so easy!

:sign0098::sign0188:

 

[BarrySumpter]

... the problem is native to android...

Bummer!

Anyone found a work around yet?

Or maybe its been fixed in a later version of android?

 

[frapel]

I don't understand permissions required...

I think this lib is very useful and powerful and I tried to use it in a project of mines but...

...I don't understand why it adds in the manifest the following permissions requirement:

android.permission.BIND_WALLPAPER
android.permission.SET_WALLPAPER

Really I can't find/imagine any primitive (there is no wallpapers management) in the lib needing those... :sign0163:

 

[frapel]

I think this lib is very useful and powerful and I tried to use it in a project of mines but...

...I don't understand why it adds in the manifest the following permissions requirement:

android.permission.BIND_WALLPAPER
android.permission.SET_WALLPAPER

Really I can't find/imagine any primitive (there is no wallpapers management) in the lib needing those... :sign0163:

:sign0163: