Android Question Out Of Memory

[Agnetha]

Hi!

I got an Out Of Memory error when reading my Json-String two times.
Even when i close and reopen the app.
The stringsize is 800kbytes big.


Sub Globals

Dim Map1 as Map
Dim lstDaten as List

end sub

Sub ReadData

Dim json as JSONParser
JSON.Initialize(File.GetText(File.DirInternal, filename))
Map1 = JSON.Nextobject
lstDaten = Map1.Get("aaData")

End Sub

 

[Erel]

Can you post the error message from the logs?

 

[Agnetha]

** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = true **
** Activity (main) Create, isFirst = false **
** Activity (main) Resume **
java.lang.OutOfMemoryError
at java.lang.AbstractStringBuilder.enlargeBuffer(AbstractStringBuilder.java:94)
at java.lang.AbstractStringBuilder.append0(AbstractStringBuilder.java:114)
at java.lang.StringBuilder.append(StringBuilder.java:249)
at anywheresoftware.b4a.objects.streams.File$TextReaderWrapper.ReadAll(File.java:568)
at anywheresoftware.b4a.objects.streams.File.GetText(File.java:209)
at dhs.mallorca.app.main._daten_einlesen(main.java:4220)
at dhs.mallorca.app.main._webview1_pagefinished(main.java:7542)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:173)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:161)
at anywheresoftware.b4a.BA.raiseEvent(BA.java:157)
at anywheresoftware.b4a.objects.WebViewWrapper$1.onPageFinished(WebViewWrapper.java:60)
at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:327)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4793)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:808)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:575)
at dalvik.system.NativeStart.main(Native Method)

 

[Erel]

Why do you need to read it again?

Are you loading any large images?

 

[Agnetha]

I used to read it twice , e.g. when the user changed the language of the app.
Now i don't do it anymore, but the error is still there when restarting the app.
No, i do not load large images.
The app used to function without errors, for a long time.
Now the json string is a little bit bigger.
In the assets folder i put a 19MB OSM-Map for offline Map-View.
Maybe i have to do it without that. I will try...

 

[Agnetha]

...still the same error.
What helped was using "ExitApplication" in Activity_Pause.
Anyway, thanks for Reply!

 

[eps]

How do you use the Map? What physical size is it, in terms of pixels?

What device are we talking about?

Have you tried large heap?

Have you tried Dimming the Jsonparser in Globals? i.e. reusing the same memory space when it's called again?

Erm, think that's about as much as I can dredge up off the top of my head.

You might be able to try and recycle the memory used - but if it's used quickly in succession that won't necessarily help.

 

[Agnetha]

Tried it without integrated offline Map.
Tried it on several devices.
Dimmed JSON in Process_Globals.
Tried large heap. (after i read about it from you )
All this had no effect.
At last only "ExitApplication" worked fine. Now i can close and reopen the App
in quick succession.

Thanks!

 

[eps]

Have you tried using Memory Manager (downloadable App) and seeing how much memory it is attempting to grab?

Which device make is it? Samsung?

 

[Erel]

If this project is not too large then you can upload it and we can help you optimize it.