Qt 6.3 Build Android App Failed

Gary Cui

I created an easy swipe app with Qt6.3. I built successfully against Device-LocalPC, but failed against Android(arm64-v8a)
I compiled it, got errors

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':checkDebugAarMetadata'.
> Could not resolve all dependencies for configuration ':debugRuntimeClasspath'.
   > Using insecure protocols with repositories, without explicit opt-in, is unsupported. Switch Maven repository 'maven(http://maven.aliyun.com/nexus/content/groups/public/)' to redirect to a secure protocol (like HTTPS) or allow insecure protocols. See https://docs.gradle.org/7.4/dsl/org.gradle.api.artifacts.repositories.UrlArtifactRepository.html#org.gradle.api.artifacts.repositories.UrlArtifactRepository:allowInsecureProtocol for more details. 

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

See https://docs.gradle.org/7.4/userguide/command_line_interface.html#sec:command_line_warnings

the error seems gradle construct failed

file build.gradle

buildscript {
    repositories {
        google()
        mavenCentral()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:7.0.2'
    }
}

repositories {
    google()
    mavenCentral()
}

apply plugin: 'com.android.application'

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
}

android {
    /*******************************************************
     * The following variables:
     * - androidBuildToolsVersion,
     * - androidCompileSdkVersion
     * - qtAndroidDir - 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
    ndkVersion androidNdkVersion

    // Extract native libraries from the APK
    packagingOptions.jniLibs.useLegacyPackaging true

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = [qtAndroidDir + '/src', 'src', 'java']
            aidl.srcDirs = [qtAndroidDir + '/src', 'src', 'aidl']
            res.srcDirs = [qtAndroidDir + '/res', 'res']
            resources.srcDirs = ['resources']
            renderscript.srcDirs = ['src']
            assets.srcDirs = ['assets']
            jniLibs.srcDirs = ['libs']
       }
    }

    tasks.withType(JavaCompile) {
        options.incremental = true
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    lintOptions {
        abortOnError false
    }

    // Do not compress Qt binary resources file
    aaptOptions {
        noCompress 'rcc'
    }

    defaultConfig {
        resConfig "en"
        minSdkVersion qtMinSdkVersion
        targetSdkVersion qtTargetSdkVersion
        ndk.abiFilters = qtTargetAbiList.split(",")
    }
}

file gradle.properties

# Project-wide Gradle settings.

# For more details on how to configure your build environment visit

# http://www.gradle.org/docs/current/userguide/build_environment.html

# Specifies the JVM arguments used for the daemon process.

# The setting is particularly useful for tweaking memory settings.

org.gradle.jvmargs=-Xmx2500m -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8


# Enable building projects in parallel

org.gradle.parallel=true


# Gradle caching allows reusing the build artifacts from a previous

# build with the same inputs. However, over time, the cache size will

# grow. Uncomment the following line to enable it.

#org.gradle.caching=true

android.bundle.enableUncompressedNativeLibs=false
androidBuildToolsVersion=31.0.0
androidCompileSdkVersion=31
androidNdkVersion=22.1.7171670
buildDir=build
qt5AndroidDir=D:/Qt/6.3.1/android_arm64_v8a/src/android/java
qtAndroidDir=D:/Qt/6.3.1/android_arm64_v8a/src/android/java
qtMinSdkVersion=23
qtTargetAbiList=arm64-v8a
qtTargetSdkVersion=30

Version infos

OS: win11 perofession
QtCreator: Qt Creator 8.0.1-Based on Qt 6.3.1 (MSVC 2019, x86_64) (Community)
Qt: Qt6.3.1
JavaJDK: jdk-11.0.11.9-hotspot
AndroidSDK: 7.0
NDKVersion: 22.1.7171670

OtherAndroidVersion
屏幕截图 2022-08-23 233230.png

Gary Cui

@JoeCFD Thanks for you reply.

It seems that android construct file 7.0.2 has some bug for android-SDK 7.0, I change android-gradle:7.0.2 to 4.2.2, it works.

I modify three steps to make it work.
Step 1: Qt\6.3.1\android_arm64_v8a\src\android\templates\build.gradle

# support version ref: https://maven.google.com/web/index.html#com.android.tools.build:gradle
#line 7, change gradle:7.0.2=>gradle:4.2.2
classpath 'com.android.tools.build:gradle:4.2.2'

Step 2: Qt\6.3.1\android_arm64_v8a\src\3rdparty\gradle\gradle\wrapper\gradle-wrapper.properties

# line 3, gradle-7.4-bin.zip => gradle-6.7.1-bin.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip

Step 3: Change Android SDK build-tools/31.0.0 filenames of d8.bat, d8.jar

Reason see: https://stackoverflow.com/questions/68387270/android-studio-error-installed-build-tools-revision-31-0-0-is-corrupted

%AppData%\Local\Android\Sdk\build-tools\31.0.0\d8.bat   => dx.bat
%AppData%\Local\Android\Sdk\build-tools\31.0.0\lib\d8.jar   => dx.jar

JoeCFD

https://docs.gradle.org/current/userguide/compatibility.html
for jdk-11, the first gradle version is 5.0. Maybe you can try lower version of gradle.
You can change gradle version in qt here:
Qt/5.15.2/android/src/3rdparty/gradle/gradle/wrapper/gradle-wrapper.properties
default version is 5.6.4 in 5.15.2. Check yours out.

Gary Cui

@JoeCFD Thanks for you reply.

It seems that android construct file 7.0.2 has some bug for android-SDK 7.0, I change android-gradle:7.0.2 to 4.2.2, it works.

I modify three steps to make it work.
Step 1: Qt\6.3.1\android_arm64_v8a\src\android\templates\build.gradle

# support version ref: https://maven.google.com/web/index.html#com.android.tools.build:gradle
#line 7, change gradle:7.0.2=>gradle:4.2.2
classpath 'com.android.tools.build:gradle:4.2.2'

Step 2: Qt\6.3.1\android_arm64_v8a\src\3rdparty\gradle\gradle\wrapper\gradle-wrapper.properties

# line 3, gradle-7.4-bin.zip => gradle-6.7.1-bin.zip
distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-bin.zip

Step 3: Change Android SDK build-tools/31.0.0 filenames of d8.bat, d8.jar

Reason see: https://stackoverflow.com/questions/68387270/android-studio-error-installed-build-tools-revision-31-0-0-is-corrupted

%AppData%\Local\Android\Sdk\build-tools\31.0.0\d8.bat   => dx.bat
%AppData%\Local\Android\Sdk\build-tools\31.0.0\lib\d8.jar   => dx.jar

JoeCFD

Are you sure you did it right? In step 2, you set gradle-7.4-bin.zip => gradle-6.7.1-bin.zip and gradle 6.7.1 will be installed. But you set the build.gradle to 4.2.2 in Step 1.
Be aware that there could more dirs in Qt\6.3.1\ like
Qt\6.3.1\android_arm64_v8a
Qt\6.3.1\android_armeabi_v7a
Qt\6.3.1\android_x86
Qt\6.3.1\android_x86_64
all of them may have build.gradle files. If yes, change all of them. Qt5 has only one dir.

Gary Cui

@JoeCFD step 1 seems to download android construct file, the construct file version is 4.2.2, it's depdence on gradle binary 6.7.1(step 2). I had built an app successfully, thanks again.