PPCJVM Android JVM target and building to dex

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PPCJVM Android JVM target and building to dex

Mgr. Janusz Chmiel
Many of advanced users and developers have tried PPCJVM. It is really
possible to create fully functioning Android applications. And because
it is even possible to access methods from previously compiled .jar
files including Mysql.jar and others, Pascal language have very big
potential.
But it has a very remarkable hook.
Latest JDK for WIndows from Oracle do not support old versions of Apache
ANT, so it is not possible to build .dex files from classes, which have
been previously generated by using PPCJVM.
So The future or Pascal compilation to .dex fomrat is severely
disadvantaged. Because old JDK 7 X release can produce .dex files and
only specific versions of Android build tools.
So The reality is, that PPCJVM can produce reliable classes, but there
is not too much projects, which can convert those .class files to dex
format.
Does somebody of you know about The solution to this issue?
I Am afraid, that this situation can lead to The fact, that PPCJVM will
not support ANDROID target JVM for too long times. If something positive
will not happen to generate while using newest JRE and JDK.

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Re: PPCJVM Android JVM target and building to dex

Free Pascal - General mailing list
Mgr. Janusz Chmiel <[hidden email]> schrieb am Sa., 3. Aug. 2019, 11:48:
Many of advanced users and developers have tried PPCJVM. It is really
possible to create fully functioning Android applications. And because
it is even possible to access methods from previously compiled .jar
files including Mysql.jar and others, Pascal language have very big
potential.
But it has a very remarkable hook.
Latest JDK for WIndows from Oracle do not support old versions of Apache
ANT, so it is not possible to build .dex files from classes, which have
been previously generated by using PPCJVM.
So The future or Pascal compilation to .dex fomrat is severely
disadvantaged. Because old JDK 7 X release can produce .dex files and
only specific versions of Android build tools.
So The reality is, that PPCJVM can produce reliable classes, but there
is not too much projects, which can convert those .class files to dex
format.
Does somebody of you know about The solution to this issue?
I Am afraid, that this situation can lead to The fact, that PPCJVM will
not support ANDROID target JVM for too long times. If something positive
will not happen to generate while using newest JRE and JDK.

Hmm? The important part of converting the .class files to classes.dex is the dx utility which is part of the Android toolchain. Apache ANT is only a build system like Make or Gradle (which seems to be /the/ hype for Android development). My first PPCJVM Android app I even built without any build scripts completely by hand (see here: https://wiki.freepascal.org/FPC_JVM_Android_Development#Building_an_Android_application ). The process might be a bit more involved nowadays, but in principle it will still be the same. 

TL;DR: the compiler is not the problem. But maybe the build chain needs to be adjusted. 

Regards, 
Sven 

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