Qt for android android version is 4.4,build wrong

[angelatyizhong]

while i build android 4.4 with android-20,see the below picture.when i build with android-27,build successful,but install with wrong.

[jsulm]

@angelatyizhong See https://doc.qt.io/qt-5.9/android-support.html
https://doc.qt.io/qt-5.9/androidgs.html

[jsulm]

@angelatyizhong I don't see any picture.
What is the device where you try to install? What is the Android version on this device? What error do you get?

[angelatyizhong]

android device with android 4.4

[jsulm]

@angelatyizhong API 27 is available starting with Android 8.x, see https://en.wikipedia.org/wiki/Android_version_history
So, it can't work on Android 4.4.

[angelatyizhong]

but when i choose android-20,i can not build successful,the failure show as the picture.why?(sdk version:26.1.1,ndk version:21.2.6472646)

[jsulm]

@angelatyizhong Because with Qt 5.14 you need API 21 or higher, see https://doc.qt.io/qt-5.14/android.html
If you really need to support Android 4.4 use an older Qt version.

[angelatyizhong]

@jsulm if i choose Qt5.9.0,which version should i choose wich sdk,ndk and jdk?

[jsulm]

@angelatyizhong See https://doc.qt.io/qt-5.9/android-support.html
https://doc.qt.io/qt-5.9/androidgs.html