saving canvas as image

Question

I've been trying to save my canvas as an Image in android but my code seems to keep on crashing every time it tries to save. I found code on the internet to do so (since there seems to be alot out there) but I can't seem to get it working for my code.

Here's what I have:

private File APP_FILE_PATH = new File("/sdcard/newpics");
protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    super.onDraw(canvas);
    paint.setStyle(Paint.Style.FILL);


         Bitmap toDisk = Bitmap.createBitmap(canvas.getWidth(),canvas.getHeight(),Bitmap.Config.ARGB_8888);
         canvas.setBitmap(toDisk);



         try {
            toDisk.compress(Bitmap.CompressFormat.JPEG, 100, new FileOutputStream(new File(APP_FILE_PATH + "/myAwesomeDrawing.png")));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }            
    }

Any suggestions on whats going bad?

Thanks

UPDATE: Heres my logcat if that helps:

12-03 22:39:48.593: E/AndroidRuntime(17637): FATAL EXCEPTION: main

12-03 22:39:48.593: E/AndroidRuntime(17637): java.lang.UnsupportedOperationException

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.HardwareCanvas.setBitmap(HardwareCanvas.java:37)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at com.example.myDraw.Draw_View.onDraw(Draw_View.java:56)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.draw(View.java:13707)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12645)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:2910)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12583)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.View.getDisplayList(View.java:12689)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1198)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewRootImpl.draw(ViewRootImpl.java:2173)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2045)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1854)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.Choreographer.doCallbacks(Choreographer.java:562)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.Choreographer.doFrame(Choreographer.java:532)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.os.Handler.handleCallback(Handler.java:725)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.os.Handler.dispatchMessage(Handler.java:92)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.os.Looper.loop(Looper.java:137)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at android.app.ActivityThread.main(ActivityThread.java:5039)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at java.lang.reflect.Method.invokeNative(Native Method)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at java.lang.reflect.Method.invoke(Method.java:511)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)

12-03 22:39:48.593: E/AndroidRuntime(17637):    at dalvik.system.NativeStart.main(Native Method)

Have a look at this, it will most certainly help! http://stackoverflow.com/a/13667141/1851478 — logray, Dec 04 '12 at 04:04
rrrrrrrrrrrrrrrrrrrrrrrrrr browser is giving me issues sorry — logray, Dec 04 '12 at 04:05
@logray - i looked at that example before and i had the same issue. What is the var screenshot? im assuming thats my canvas? — user818502, Dec 04 '12 at 04:14
I'm not really a fan of soon feeding, but here have a look at this one: http://stackoverflow.com/questions/8962374/android-convert-canvas-to-bitmap-then-save-to-sd-card — logray, Dec 04 '12 at 04:18
@logray - thanks that helped...That was the only solution that actually worked in my solution. — user818502, Dec 04 '12 at 06:55

score 0 · Answer 1 · edited May 23 '17 at 11:56

0

Look at this code hope this is what you want.

View content = findViewById(R.id.layoutroot);

you can take screen shot of which view you want. R.id.CanvasView . Hope this helps

edited May 23 '17 at 11:56

Community

1
1

answered Dec 04 '12 at 05:59

Zohaib

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saving canvas as image

1 Answers1