Button Images not displaying

Bryan · Jul 12, 2013

I have a Samsung Note 8 tablet running android 4.1.2. I'm using B4A 2.52 currently. I have created a panel with 2 buttons in designer. For the buttons I have used .png images the same size as the buttons. They were created in photoshop. The panel with the two buttons are used for a widget. In the B4A designer app on the device the images display correctly. After compiling the code the buttons are just gray boxes but still function normally. I cannot figure out what to do to make the images display. Could this be related to the android 4.1.2 OS? Would updating to B4A 2.72 fix this problem? Should I just assign the images to the buttons in code instead? Help is always greatly appreciated.

Thanks,
Bryan

Erel · Jul 14, 2013

It is most probably not related to the OS version. Can you upload your layout file with the images?

Bryan · Jul 20, 2013

Erel said:
It is most probably not related to the OS version. Can you upload your layout file with the images?

I see now that I cannot use statelistdrawable for buttons in designer for widgets. Instead I used imageview for the buttons. This works out nicely to create buttons except I would like to be able to display a pressed state for these buttons. I decided to load new images that would display a pressed state for the buttons on imageview_click event. This works but is way to fast to even see the change of images. Is there a simple way to slow it down so the "pressed state" image is displayed a little longer before I change it back to the "un-pressed state" image.
Here is what I am doing. I can barely see the change of the images because they switch too fast. I would need a delay possibly for a few milliseconds.
Shoul

B4X:

Sub ImageView1_click
    rv.SetImage("Imageview1",LoadBitmap(File.DirAssets,"BlankB.png"))
    rv.UpdateWidget
    rv.SetImage("Imageview1",LoadBitmap(File.DirAssets,"IN1.png"))
    rv.UpdateWidget

MotoMusher · Jul 20, 2013

set a timer to 1000 for 1 second (ms). Move the last 2 lines above to a timer_tick event. be sure to disable the timer in that even as well.

Bryan · Jul 23, 2013

Thanks, much I will give that a try. I was playing around with using beeper from the audio lib. I was setting it to a time to about 500 ms and a very low frequency that couldn't be easily heard and that worked good as a timer. But I'll try the timer method so I don't need to have to load an additional lib (audio) just for a delay.

chrjak · Feb 28, 2014

hey guys,
I have the same problem but its harder than his...
I would do it with an Imageview but i can't export my Buttons as Images... Always there are some corners...
Is there a trick to export the Button Design as Image?
Erel should know...
Regards

Erel · Feb 28, 2014

The corners are part of the button background image. You can use Canvas.DrawDrawable to draw a button an a bitmap.

colin van Blommestein · Feb 28, 2014

Erel said:
The corners are part of the button background image. You can use Canvas.DrawDrawable to draw a button an a bitmap.

Hi Erel
I'm trying to resolve a DBUtils NullPointerException error

SQL.ExecNonQuery2(sb.ToString, args)
The sb string and args are correctly formatted

The sequence of events is

Extract a record
Populate edit objects
Change contents of edit object
UPDATE the record

Am I missing something in the sequence of events?

chrjak · Feb 28, 2014

Erel said:
The corners are part of the button background image. You can use Canvas.DrawDrawable to draw a button an a bitmap.

How can i set the Button text?

strat · Feb 28, 2014

chrjak said:
How can i set the Button text?

Try this. It may be exactly what you want to do.

http://www.b4x.com/android/forum/threads/button-draw-draw-text-and-image-on-a-button.36781/

chrjak · Feb 28, 2014

strat said:
Try this. It may be exactly what you want to do.

http://www.b4x.com/android/forum/threads/button-draw-draw-text-and-image-on-a-button.36781/

Puhh- very confusing

strat · Feb 28, 2014

The code may be confusing but you can use it by call buttondraw sub.

chrjak · Feb 28, 2014

Great. Thanks...

Button Images not displaying

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