Android Question android.graphics.Bitmap.setDensity(int)

[Scantech]

I use this code to load .png

MediaManager.SetMediaWithExtra(pnlCLV.GetView(x).GetView(0), GetIconLink, "image/*", CreateMap(MediaManager.REQUEST_CALLBACK: Me))

In SMM_MediaReady i do this

                Dim Out As OutputStream
                Out = File.OpenOutput(File.DirInternal, Starter.SelectedFolder & WhatFileName, False)
                Media.Media.As(B4XBitmap).WriteToStream(Out, 50, "PNG")
                Out.Close

Out of 200 png few of them gets this error when i load the png file using this

 MediaManager.SetMediaFromFile(pnlCLV.GetView(x).GetView(0), File.DirInternal, Starter.SelectedFolder & WhatFileName, "image/*", Null)

error code

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.graphics.Bitmap.setDensity(int)' on a null object reference

When i download the png with Http job and save the job.GetInputStream. it loads perfectly fine.

 

[Erel]

What is the output of:

Log("bmp: " & Media.Media)

BTW, what is the purpose of this code? Why load the same image twice?

 

[Scantech]

What is the output of:

Log("bmp: " & Media.Media)

BTW, what is the purpose of this code? Why load the same image twice?

Maybe i dont understand the purpose of the MediaManager.SetMediaWithExtra? It is making a http request which causes data usage if i keep repeating the code. Therefore, I save the file so i can show the image with MediaManager.SetMediaFromFile.

 

[Scantech]

Here is another one

(SMM_MediaReady)
bmp: android.graphics.Bitmap@e879bf6
WULCjJZ.png
SMM_READY ERROR: (IllegalStateException) java.lang.IllegalStateException: Can't compress a recycled bitmap

test image
https: //i.imgur.com/WULCjJZ.png
remove spaces after https:

 

[Scantech]

i noticed the Sub SMM_MediaReady get rapidly triggered and may causing issues with writetostream? I get more errors with scrolling fast.

 

[Erel]

You are not using SMM correctly. SMM manages its own cache. No need to save the images yourself.

 

[Scantech]

You are not using SMM correctly. SMM manages its own cache. No need to save the images yourself.

The cache clears when the app gets closed or restart the phone. That's why I save my own file.

 

[Erel]

Caches are indeed temporal.

If you want to download images and save them offline then use OkHttpUtils2. SMM was built for a different purpose.