Android Question Check android version before app initialize?

Hamied Abou Hulaikah · Aug 5, 2018

Hi, How to Check android version before app initialize and crash in old android versions?

npsonic · Aug 5, 2018

Check minSdkVersion and targetSdkVersion from manifest.

Project > Manifest Editor
Row 5: <uses-sdk android:minSdkVersion="5" android:targetSdkVersion="19"/>

Hamied Abou Hulaikah · Aug 5, 2018

I meant check programmatically before application initialized (not in activity create)

KMatle · Aug 5, 2018

Via phone lib:

B4X:

If p.sdkversion >=23 Then ...

Hamied Abou Hulaikah · Aug 5, 2018

KMatle said:
Via phone lib:

But where i can call it?
application with old android version crashes before reach activity create!

DonManfred · Aug 5, 2018

It crashes with which errormessage???

Hamied Abou Hulaikah · Aug 5, 2018

DonManfred said:
It crashes with which errormessage???

Unfortunately your app has stopped
It appears before anything start! I know the error is because old android versions (in new one it works fine)

DonManfred · Aug 5, 2018

- NO NEED to write everything in bold!

Connect your device with usb and usb-debugging enabled and post the log. Maybe the unfiltered log from logcat.

In fact there IS a log. Without positing it it is hard to give any advices.

I don´t plan to give any more answer here

npsonic · Aug 5, 2018

I don't understand why you can't just modify minSdkVersion.
If your app doesn't work with the older sdks you should set it correctly from manifest.

KMatle · Aug 5, 2018

The question was how to check the version at runtime. However. Please use the search function how to use the phone library or search for "p.sdkversion" to see examples.

If errors occur, we need to see the exception message (via logs). And yes... There are always messages in the logs. Get used to check those messages to know what went wrong. If you get online with your app, you get exactly those messages from Google. So no magic here.

Hamied Abou Hulaikah · Aug 5, 2018

KMatle said:
The question was how to check the version at runtime.

that it is
I want to check before app started

ivan.tellez · Aug 5, 2018

HAH said:
I want to check before app started

Without starting your app, borrow the phone, go to settings, About the phone, Software info, And check the Android Version. Or somehow ask the user to do it.

After the app is launched, you have the aswer in poast #4. Yo can put that in the starter service. But KMatle is right, if you dont know what is the error or what causes, there is no point on ksnowinf the android version.

Hamied Abou Hulaikah · Aug 12, 2018

Today i got old android version phone, the debug log is:

B4X:

** Service (firebasemessaging) Start **
Error occurred on line: 27 (FirebaseMessaging)
java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.tasks.Task com.google.firebase.iid.FirebaseInstanceId.zza(java.lang.String)' on a null object reference
    at com.google.firebase.messaging.FirebaseMessaging.subscribeToTopic(Unknown Source)
    at anywheresoftware.b4a.objects.FirebaseNotificationsService$FirebaseMessageWrapper.SubscribeToTopic(FirebaseNotificationsService.java:130)
    at com.yemenet.aloo.firebasemessaging._subscribetotopics(firebasemessaging.java:210)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:735)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:357)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:260)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
    at anywheresoftware.b4a.BA$2.run(BA.java:365)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5912)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1405)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1200)

Hamied Abou Hulaikah · Aug 12, 2018

I need to check version before crash error

ivan.tellez · Aug 12, 2018

HAH said:
application with old android version crashes before reach activity create!

You can check in starter service

HAH said:
I need to check version before crash error

And again, if you just want to check version to say that the app is not compatible, just change the android:minSdkVersion in the manifest.

tigrot · Aug 12, 2018

And if error happens before any user code execution(app init) you are not able to do anything useful. Use manifest...

Hamied Abou Hulaikah · Aug 12, 2018

ivan.tellez said:
And again, if you just want to check version to say that the app is not compatible, just change the android:minSdkVersion in the manifest.

Google play publish new roles not accepting older sdk, So I can't lower sdk version!

Hamied Abou Hulaikah · Aug 12, 2018

tigrot said:
And if error happens before any user code execution(app init) you are not able to do anything useful. Use manifest...

This is what i need .. How to do check version compatibility in manifest?

npsonic · Aug 12, 2018

HAH said:
This is what i need .. How to do check version compatibility in manifest?

Check my first answer. You have to set higher min sdk value. There is no other way.

tigrot · Aug 12, 2018

HAH said:
This is what i need .. How to do check version compatibility in manifest?

You cannot check. You can only forbid installation on former Android versions

Android Question Check android version before app initialize?

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