Android Question Why Successfully installed on some cellphones but failed on others?

[taufik adi sanjaya]

I success to compile and install an application develop using b4a on my cellphone, but some of my colleagues' cellphones failed to install the same application

please tell me what to do in order to success install same application on my my colleagues' cellphones

the message is apl not installed

 

[taufik adi sanjaya]

this is the apk (please check my attachment )

 

[Sagenut]

Probably not the solution but, if you are not thinking to put your app on Google Play try modifying Manifest

<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="26"/>

 

[agraham]

I don't know how you produced that apk but it is only signed with a V1 signature and will not install on later Android devices. Are you using an old version of B4A? If so you need to update to the latest.

APK Signature Scheme V2 now required : Api 30

Just received an email from google play update that contains informations about the new target sdk requirements starting August 2021. it also mention this : Apps that target Android 11 (API level ...

stackoverflow.com

 

[agraham]

Note that you will also need to install the latest SDK as well as the latest B4A.

 

[taufik adi sanjaya]

Probably not the solution but, if you are not thinking to put your app on Google Play try modifying Manifest

<uses-sdk android:minSdkVersion="5" android:targetSdkVersion="26"/>

I need to upload this apps to playstore..

 

[Spavlyuk]

You need to target at least API level 30: https://developer.android.com/google/play/requirements/target-sdk

 

[taufik adi sanjaya]

You need to target at least API level 30: https://developer.android.com/google/play/requirements/target-sdk

yes i set to 30 , the apps can be installed at old smartphone but failed to install at new android smartphone

 

[agraham]

I already told you why above in post #4. Your example apk is only signed with a V1 signature. If you have not corrected that it will not install on newer versions of Android.

 

[taufik adi sanjaya]

Note that you will also need to install the latest SDK as well as the latest B4A.

Hi Agraham, thanks for reply -- > i use b4a 11.80

sdk downloaded from this link https://b4xfiles-4c17.kxcdn.com/b4a/resources_06_21.zip

 

[agraham]

With B4A 11.80 and the latest SDK I don't know why your example in the first post is not fully signed. Compile a new empty project and post the apk and let's see if that is fully signed - otherwise Erel might have to have a guess at what's wrong.