B4A Library Admob Interstitial Library

Because the old Admob SDK will be deprecated in August, I have written a library for interstitials using the new Google Play Services library. You'll need to follow initial steps noted in Erel's post for the Admob banner library to get your app ready for this library.

The new library should be compatible with your old code with the exception of a change to the AdFailedToReceive event. It should be declared in your app as follows.

B4X:
Sub mwadi_AdFailedToLoad (ErrorMessage As String)
    Log("failed to load ad: " & ErrorMessage)
End Sub

This new library also supports a new event that triggers when the user closes an ad. You can use this event to queue a new ad to load or run other code.

B4X:
Sub mwadi_AdClosed
    mwAdInterstitial.LoadAd
End Sub

The new library is called mwAdmobInterstitial2. I added the 2 to the end of the name so you can preserve your old library in case it is needed with other apps. The new library and example app for the library is attached at the end of this post.

============================================
Below is for the old version (not using Google Play Services)
============================================
I was able to put together a library to display interstitial ads from Admob. You'll need to create an interstitial ad unit in Admob and use it with the initialization process.

Make sure the following is added to your AndroidManifest.xml.
B4X:
AddApplicationText(<activity android:name="com.google.ads.AdActivity"
          android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>)

Here is code from the included sample app that shows how to use the library. Because the interstitial is running as an activity, I'm not able to raise an event in B4A when it is dismissed. Instead, you can check the status in Activity_Resume as shown in the code below.

A good practice would be to initialize the ad in Activity_Create, and then show the ad later when desired. This will allow the ad to fully load while other processes are taking place allowing you to show the ad immediately.

This is a beta version and the first library I've shared, so please report any problems.

NOTE: There is a bug in older versions of the SDK that causes a crash on some devices when you try to load the interstitial. Make sure you download an updated SDK from Admob.

1.1 Update: Fixed a bug in the library code used to raise the AdFailedToLoad event. Separated out the LoadAd routine from the Initialize routine. This allows you to load a new ad after an ad has been dismissed without re-initializing the class.

B4X:
Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
    Dim mwAdInterstitial As mwAdmobInterstitial
    Dim Button1 As Button
    Dim Label2 As Label
End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
    mwAdInterstitial.Initialize("mwadi","INSERT_YOUR_AD_UNIT_ID")
    mwAdInterstitial.LoadAd
    Activity.LoadLayout("1")
    Label2.Text="Attempting to load ad...  Please wait."
End Sub

Sub Activity_Resume
    If mwAdInterstitial.Status=mwAdInterstitial.Status_Dismissed Then Label2.Text="Ad dismissed by user."
End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub


Sub mwadi_AdLoaded
    Log("ad loaded")
    Label2.Text="Ad loaded - Click Show Ad to Display"

End Sub

Sub mwadi_AdFailedToLoad (ErrorCode As String)
    Label2.Text="Ad failed to load with error code: " & ErrorCode
    Log("failed to load ad: " & ErrorCode)
End Sub

Sub Button1_Click
    If mwAdInterstitial.Status=mwAdInterstitial.Status_AdReadyToShow Then mwAdInterstitial.Show
    If mwAdInterstitial.Status=mwAdInterstitial.Status_Dismissed Then
        Label2.Text="Attempting to load ad...  Please wait."
        mwAdInterstitial.LoadAd
    End If
End Sub
 

Attachments

  • interstitial.png
    interstitial.png
    86 KB · Views: 663
  • AdmobInterstitial1.1.zip
    10.6 KB · Views: 889
  • AdmobInterstitialPlayServices.zip
    11.5 KB · Views: 898
Last edited:

jota

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Thanks for the library, will be very useful.
 
Last edited:

MaxApps

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You say:
You'll need to create an interstitial ad unit in Admob and use it with the initialization process.

How do I do that? I can´t find that anywhere at Admob and I cannot find it in their help
 

MaxApps

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Longtime User
I figured it out - MEDIATION

Works well. Thank you for this much needed library :)
 

MaxApps

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Longtime User
How do I load the interstitial more than one time?
If re initialize it again, it comes up with an error.
Is there a reload?
also if you have already shown the ad and dismissed it, if you then change the oriantation, it come up with error:
An error has occurred in sub: java.lang.Exception: Sub mwadi_adfailedtoload signature does not match expected signature. Continue?
 

Jack Cole

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Longtime User
I have published an update to the library above fixing the problem with raising the AdFailedToLoad event. I have also implemented a separate LoadAd routine so you can call it again to load a new ad after it has been dismissed without having to re-initialize.
 

icebold

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Longtime User
Hi Job Jack,
thanks for the library you shared.
I report this error compiling the code filled with my admob pub ID: A referenced library is missing: googleadmobadssdk-6.4.1

The GoogleAdMobAdsSdk-6.4.1.jar library is copied in my "other lib" path but the example programs doesn't work.
Do I have to add some more lib ?
 
Last edited:

icebold

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Hi Jack,
all files are in the same folder but I always get this error:
Convert byte code - optimized dex. Error
A referenced library is missing: googleadmobadssdk-6.4.1
:confused:
 

Jack Cole

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That is a mystery to me. I just tried it out again on my PC and everything is working. I don't have the files in the other libs folder, but in the b4a main libraries folder.
 

icebold

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Longtime User
That is a mystery to me. I just tried it out again on my PC and everything is working. I don't have the files in the other libs folder, but in the b4a main libraries folder.
I also moved the files in the main lib folder but I get the same error.
I want to test it again on my other pc during the weekend. I will let you know.
Thanks Jack!
 

Rorry

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Longtime User
Hi, thanks for this lib.

any idea about the compiler error i get:

Parsing code. 0.09
Compiling code. 0.16
Compiling layouts code. 0.01
Generating R file. 1.27
Compiling debugger engine code. 1.15
Compiling generated Java code. 0.95
Convert byte code - optimized dex. Error
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lcom/google/ads/Ad;
at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:123)
at com.android.dx.dex.file.DexFile.add(DexFile.java:163)
at com.android.dx.command.dexer.Main.processClass(Main.java:490)
at com.android.dx.command.dexer.Main.processFileBytes(Main.java:459)
at com.android.dx.command.dexer.Main.access$400(Main.java:67)
at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:398)
at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:245)
at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:131)
at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:109)
at com.android.dx.command.dexer.Main.processOne(Main.java:422)
at com.android.dx.command.dexer.Main.processAllFiles(Main.java:333)
at com.android.dx.command.dexer.Main.run(Main.java:209)
at com.android.dx.command.dexer.Main.main(Main.java:174)
at com.android.dx.command.Main.main(Main.java:91)
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.hp.hpl.sparta.Node$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.hp.hpl.sparta.Sparta$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
warning: Ignoring InnerClasses attribute for an anonymous inner class
(com.hp.hpl.sparta.Sparta$2) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.
1 error; aborting
Optimized dexer failed. Switching to Standard dexer.

thank you for help.
 

Rorry

Member
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Longtime User
ok erel. thank you.
so we have to choose between banners and Interstitials ads. we cant use the both?
 
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