Android Studio Project require older version of Gradle

Question

I'm trying to compile some Android Studio Project, but get this error message:

Gradle sync failed: Gradle version 2.2 is required. Current version is 3.3.

When I click to fix issue link near the message, I'm getting:

Gradle sync failed: Could not find property 'androidCompileSdkVersion' on com.android.build.gradle.AppExtension_Decorated@580ec9dd.

In file 'android-build' I have:

/******************************************************* * The following variables: * - androidBuildToolsVersion, * - androidCompileSdkVersion * - qt5AndroidDir - holds the path to qt android files * needed to build any Qt application * on Android. * * are defined in gradle.properties file. This file is * updated by QtCreator and androiddeployqt tools. * Changing them manually might break the compilation! *******************************************************/ compileSdkVersion androidCompileSdkVersion.toInteger() buildToolsVersion androidBuildToolsVersion sourceSets { main { manifest.srcFile 'AndroidManifest.xml' java.srcDirs = [qt5AndroidDir + '/src', 'src', 'java'] aidl.srcDirs = [qt5AndroidDir + '/src', 'src', 'aidl'] res.srcDirs = [qt5AndroidDir + '/res', 'res'] resources.srcDirs = ['src'] renderscript.srcDirs = ['src'] assets.srcDirs = ['assets'] jniLibs.srcDirs = ['libs'] } }

What is your compileSdkVersion, targetSdkVersion and gradle version set in the build.gradle file?? — Bethan
– Bethan, Commented Jul 18, 2017 at 11:17
Hm, so, I viewing 'gradle-wrapper.properties' and have not such variables, and in the 'build.gradle' they are absent. — Jago
– Jago, Commented Jul 18, 2017 at 11:47

Bethan · Accepted Answer · 2017-07-18 12:00:18Z

Change the gradle version at your project root build.gradle file like below

classpath 'com.android.tools.build:gradle:2.3.3'

Or change it to the latest gradle version which you have upgraded to.

David K. Hess · Accepted Answer · 2018-10-05 14:39:53Z

In my case with Qt 5.11.1, the easiest fix was to just copy the gradle.properties file from the android build directory to sit next to build.gradle.

I found it here:

build-MyApp-Android_for_armeabi_v7a_GCC_4_9_Qt_5_11_1_for_Android_armv7-Release/android-build/gradle.properties

Once copied in, Android Studio was able to sync. Make sure not to commit this file! You'll need to copy another one if you upgrade Qt.

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