Android: getting build errors (first time)

mzimmers

NOTE: I changed the title of this post because I was asking the wrong question.

Hi all -

Brand new to Android, both as a user and programmer...this ought to be interesting.

I have just been given a Galaxy Tab A, and asked to download a Qt app to it. From my reading, it appears I first need to add something called a "System Image" to my Qt configuration. From what I can see, the correct System Image depends on the architecture of the processor in my tablet. My device has a Cortex-A53, which uses the Armv8-A architecture.

So, do I correctly infer that I should select "Google APIs ARM 64 v8a" as my system image?

EDIT:

After a bit more reading, now I'm not sure that I want a system image after all. So, let me ask this:

How do I download my Qt application to my Android device?

Thanks...

J.Hilk

@mzimmers said in Android: how to determine which System Image to use?:

How do I download my Qt application to my Android device?

make sure your sdk, jdk and ndk is set up correctly:

enable development options on your android device. In those settings enable usb debugging
connect your device to your pc, in the popup that follows, allow file transfer
select the android kit in qt creator
hit build and run, a popup will appear with a list of all detected android devices, select your target
let the compile and deploy magic happen
enjoy

JoeCFD

google apis intel x86 atom_64 system image is for emulator which is better created in android studio.
arm 64 v8a system image is for emulator as well, but on arm structure. I installed both.

mzimmers

@J-Hilk thanks for the detailed steps! My setup didn't work quite the way you outlined -- I didn't get a popup of Android devices, but my device does appear in Creator (so I could select it in my kit). My build is giving me lots of unhelpful error messages:

While it isn't explicitly mentioned in the getting started page, one of the Android examples mentions the need to put paths to Perl and my C++ compiler into my PATH environment variable. I haven't done that yet; could this be contributing to these errors?

Thanks...

mzimmers

Well, I managed to get it fixed. It needed two things:

I had to comment out a subdirectory in this part of the CMakeLists.txt file:

set_property(TARGET appaccelbubble APPEND PROPERTY
      QT_ANDROID_PACKAGE_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}#/android
)

I changed my NDK from 23.1.whatever to 25.1.whatever, based on an old thread here.

I can see this development exercise is going to be an adventure -- sure are a lot of moving parts to Android development.

Thanks to all who looked...