Immutable bitmap crash error

Question

java.lang.IllegalStateException: Immutable bitmap passed to Canvas constructor
at android.graphics.Canvas.<init>(Canvas.java:127)
at app.test.canvas.StartActivity.applyFrame(StartActivity.java:214)
at app.test.canvas.StartActivity$1.onClick(StartActivity.java:163)
at android.view.View.performClick(View.java:4223)
at android.view.View$PerformClick.run(View.java:17275)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4898)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
at dalvik.system.NativeStart.main(Native Method)

I get this crash error from the developer console .. I don't understand what is the problem ..

    BitmapFactory.Options opt = new BitmapFactory.Options();
    opt.inScaled = true;
    opt.inPurgeable = true;
    opt.inInputShareable = true;
    Bitmap brightBitmap = BitmapFactory.decodeResource(getResources(), position, opt); 
    brightBitmap = Bitmap.createScaledBitmap(brightBitmap, 550, 550, false);
    chosenFrame = brightBitmap;
    Bitmap workingBitmap = Bitmap.createBitmap(chosenFrame);
    workingBitmap = Bitmap.createBitmap(workingBitmap); 
    Canvas c = new Canvas(workingBitmap);

I think it's related to this ?

score 236 · Accepted Answer · edited May 23 '17 at 12:18

236

You have to convert your workingBitmap to Mutable Bitmap for drawing on Canvas. (Note: this method does not help save memory, it will use extra memory)

Bitmap workingBitmap = Bitmap.createBitmap(chosenFrame);
Bitmap mutableBitmap = workingBitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(mutableBitmap);

This answer helps don't waste memory Convert immutable bitmap to a mutable bitmap

edited May 23 '17 at 12:18

Community

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answered Oct 29 '12 at 10:25

dimetil

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this method helps save memory. I edited answer with simplest way to do mutable bitmap – dimetil Oct 29 '12 at 11:00
when I use the method, then the app crashes and in the logcat it says that canvas can't use a recycled bitmap – Yerry Huntry Oct 29 '12 at 11:06
So i use your method without the answer in the link ? – Yerry Huntry Oct 29 '12 at 11:07
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@dimetil How does it not waste memory? it actually creates a totally identical new bitmap so you use 2 times more memory on this bitmap ... – android developer May 01 '13 at 08:28
here's a method that saves memory, which i've created: http://stackoverflow.com/a/16314940/878126 – android developer Jul 08 '13 at 09:32
what is chosenFrame ? – reza_khalafi Jan 05 '21 at 10:10

score 44 · Answer 2 · edited Mar 10 '16 at 01:09

44

BitmapFactory.decodeResource() returns an immutable copy of the bitmap and you cannot draw to its canvas. In order to get its canvas, you need to get a mutable copy of the images' bitmap and that can be done with single line code addition.

opt.inMutable = true;

Add that line to your code and it should address the crash.

edited Mar 10 '16 at 01:09

BartoszKP

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answered Oct 28 '13 at 22:22

codeFood

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this should be the answer since it doesnt consume memory which is the case when using bitmap.copy(...) – java Feb 14 '16 at 19:32
It' essential to check Bitmap properties and set them before loading Bitmap into memory. Use this answer if memory is an issue, esspecialy it is if you are using bitmap with big dimensions. – Thracian Feb 19 '17 at 11:20

score 5 · Answer 3 · answered Feb 12 '18 at 12:28

5

Unless you don't want to make your IMMUTABLE bitmap to MUTABLE bitmap, you can save memory by ALWAYS REUSING THE BITMAP

workingBitmap = workingBitmap.copy(Bitmap.Config.ARGB_8888, true);
Canvas canvas = new Canvas(workingBitmap);

However I think this may be same as making the bitmap mutable by calling

workingBitmap.isMutable = true

answered Feb 12 '18 at 12:28

Ujju

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There is not variable called "isMutable" inside bitmap – Amr Ashraf Jul 18 '19 at 23:11

score 5 · Answer 4 · answered Nov 22 '19 at 16:01

5

This works as well, I just tested it.

final BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable = true;
return BitmapFactory.decodeByteArray(resultDecoded, 0, resultDecoded.length,options);

answered Nov 22 '19 at 16:01

Joe

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score 1 · Answer 5 · edited May 23 '17 at 12:10

1

in order to minimize memory usage, you can check out this post about converting/decoding a mutable bitmap straight from the resources :

https://stackoverflow.com/a/16314940/878126

edited May 23 '17 at 12:10

Community

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answered Aug 24 '13 at 10:07

android developer

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Immutable bitmap crash error

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