Android Question How to appication stable

[fishwolf]

i have finish a big application, but work fine only for few minuts, it crash for out of memory.

i have read many threads on forum but i don't resolve.

FIRST PROBLEM
with monitor utility i have indentify the first section and problem of memory leak
i have a list of strings and use a canvas object and MeasureStringWidth for truncate the long strings
when i change the orientation of phone i lost about 2 Mb with the only initialization of canvas object

what is the right method for destroy canvas object ?

// Create List
CanvasText.Initialize(Activity)
   
   For i = 0 To ValuesItems.Size - 1
     
     // if don't run the function the memory leak is already present
     Label1.Text = TrimWidth(CanvasText, Label1.Text, Label1.Typeface, Label1.TextSize, LabelWidth)
  
  Next

Sub TrimWidth(CanvasText As Canvas, Text As String, Style As Typeface, Size As Int, MaxWidth As Int) As String
Dim Width As Int
   
   
   If Style.IsInitialized = False Then
       Style = Typeface.DEFAULT
   End If
   
   Width = CanvasText.MeasureStringWidth(Text, Style, Size)
   If Width >= MaxWidth Then
     Do Until Width < MaxWidth
       Text = Text.SubString2(0, Text.Length - 1)
       Width = CanvasText.MeasureStringWidth(Text, Style, Size)
     Loop
     Text = Text.SubString2(0, Text.Length - 3) & "..."
     Return Text
   Else
     Return Text
   End If
   
End Sub

 

[Erel]

Try to find the problematic component. See if this error happens if you don't add the action bar.

 

[fishwolf]

Try to find the problematic component. See if this error happens if you don't add the action bar.

The memory leak problem is into admod banner
if i remove, memory heap is stable

do you think that the problem is into google library (i have update to may 2014) or into wrapper ?

 

[Periklis Koutsogiannis]

The AdMob wrapper is just a ViewWrapper of the native AdView component. I don't think that the wrapper is the problem.

 

[Erel]

Try this:
1. Add this line to Process_Globals:

Private oldAdView As JavaObject

2. Add this code in Activity_Create:

If oldAdView.IsInitialized Then
     oldAdView.RunMethod("destroy", Array())
   End If
   Fn.CreateAdMob(Main.gAdId) '<-- original code
   Dim o As Object = Fn.m_AdBanner
   oldAdView = o

 

[fishwolf]

Try this:
1. Add this line to Process_Globals:

Private oldAdView As JavaObject

2. Add this code in Activity_Create:

If oldAdView.IsInitialized Then
     oldAdView.RunMethod("destroy", Array())
   End If
   Fn.CreateAdMob(Main.gAdId) '<-- original code
   Dim o As Object = Fn.m_AdBanner
   oldAdView = o

no, doesn't work fine

 

[Erel]

Do you get the same error?

 

[fishwolf]

Do you get the same error?

yes

Create
Downsampling image due to lack of memory: 2
java.lang.OutOfMemoryError
   at android.os.Parcel.nativeReadString(Native Method)
   at android.os.Parcel.readString(Parcel.java:1473)
   at bwe.n(SourceFile:204)
   at aex.a(SourceFile:83)
   at afa.a(SourceFile:104)
   at aer.a(SourceFile:174)
   at aer.a(SourceFile:151)
   at afw.run(SourceFile:14)
   at afy.run(SourceFile:30)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
   at java.lang.Thread.run(Thread.java:856)

Downsampling image due to lack of memory: 4

java.lang.OutOfMemoryError
   at android.os.Parcel.nativeReadString(Native Method)
   at android.os.Parcel.readString(Parcel.java:1473)
   at bwe.n(SourceFile:204)
   at aex.a(SourceFile:83)
   at afa.a(SourceFile:104)
   at aer.a(SourceFile:174)
   at aer.a(SourceFile:151)
   at afw.run(SourceFile:14)
   at afy.run(SourceFile:30)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
   at java.lang.Thread.run(Thread.java:856)

 

[Erel]

There is something strange happening in your app. Try to destroy (with JavaObject) the ad in Activity_Pause and recreate it in Activity_Resume.

 

[fishwolf]

i have resolved memory lead od admob with

Sub Pause
   If m_AdBanner.IsInitialized == True Then
     m_AdBanner.Pause
   End If
End Sub

Sub Resume
   If m_AdBanner.IsInitialized == True Then
     m_AdBanner.Resume
   End If
End Sub

but other application sections have little memory leak

 

[fishwolf]

I have discovery that in each activities where i use admod the resources (bitmap, table, list) create a memory leak.

the larger the resources, the more memory is consumed

Any idea ?

 

[fishwolf]

I have discovery that in each activities where i use admod the resources (bitmap, table, list) create a memory leak.

the larger the resources, the more memory is consumed

Any idea ?

i find into monitor this message.

The Google Play services resources were not found. Check your project configuration to ensure that the resources are included.

i already add this line into main activities
#AdditionalRes: C:\Users\Administrator\AppData\Local\Android\android-sdk\extras\google\google_play_services\libproject\google-play-services_lib\res, com.google.android.gms

and

Could not find class 'android.support.v4.app.FragmentActivity', referenced from method com.google.android.gms.common.GooglePlayServicesUtil.b

 

[Erel]

You should call Pause and Resume from all of the activities.

This message is not related. The resources are found. If they are not found you will get an error about a missing resource.

I also encountered this message. Not sure why it shows.

 

[fishwolf]

You should call Pause and Resume from all of the activities.

This message is not related. The resources are found. If they are not found you will get an error about a missing resource.

I also encountered this message. Not sure why it shows.

I already done

I have add the "Locandine" feature into app, it display a image, each execution create a memory leak of 2-3 Mb

If i remove admob, memory leak is not present

  'COMMENT THIS LINE 
  'Fn.CreateAdMob(Main.gAdId)

 

[Erel]

You can try to destroy the ad after calling pause with the code I previously posted and then recreate it in Resume.

 

[fishwolf]

ok, with this code work file without memory leak

Thanks Erel

Sub Process_Globals

   Private DestroyObjects As JavaObject
   
End Sub

Sub Activity_Resume
   
   Fn.CreateAdMob(Main.gAdId)

End Sub

Sub Activity_Pause (UserClosed As Boolean)
   
   If DestroyObjects.IsInitialized Then
     DestroyObjects.RunMethod("destroy", Array())
   End If

   Dim OldObject As Object = Fn.m_AdBanner
   DestroyObjects = OldObject
   
End Sub