基于Qt 5.12.2（Qt Creator4.8.2），可以部署Android环境，进行QT C++代码开发并编译出出apk，运行于手机或模拟器上。
步骤1，下载Qt5.12.2
https://download.qt.io/official_releases/qt/5.12/5.12.2/qt-opensource-windows-x86-5.12.2.exe
在安装过程中，选择以下3个Android组件，满足不同处理器手机的需要
1）Android x86
2）Android ARMv7
3）Android ARM64-v8a
步骤2，下载JDK1.8，如jdk1.8.0_40_x64或其他版本
步骤3，下载SDK，如android-sdk_r24.4.1-windows.zip
Android SDK 百度网盘下载地址链接 http://tools.android-studio.org/index.php/sdk/
运行android-sdk-windowsSDK Manager.exe下载相应的编译链工具和环境，此处选择Android9（API 28）
步骤4，下载NDK，如android-ndk-r18b-windows-x86_64.zip
NDK 下载 | Android NDK | Android Developers
以上4个步骤完成后，打开Qt Creator进行配置Android环境，如下图
以上，说明JDK、SDK和NDK已经部署成功完毕。
（未安装image时，无法创建AVD Android Virtual Device）
如果需要在本地启动Android模拟器，还需要在SDK Manager中下载相应的x86、x86_64、arm64-v8a和armeabi-v7a的image镜像文件；下载完毕后，在【AVM管理器】点击【add】，选择手机型号和image镜像，就可以创建出Android虚拟设备，在Qt Creator中运行时选择使用。
（Android7.1.1以后，不再提供arm系列的image，因此只能下载x86和x86_64的image）
下面，可以新建工程，选择Android设备，开发和编译出apk了，如下图
从上图可以看出，已经可以选择Android设备，通过设置project项目属性，如下图
点击【构建】，就可以生成apk了。
07:51:08: 为项目untitled-1执行步骤 ... 07:51:08: 配置没有改变, 跳过 qmake 步骤。 07:51:08: 正在启动 "C:SkySVNAndroidToolsandroid-ndk-r18b-windows-x86_64android-ndk-r18bprebuiltwindows-x86_64binmake.exe" -j8 make: Nothing to be done for `first'. 07:51:08: 进程"C:SkySVNAndroidToolsandroid-ndk-r18b-windows-x86_64android-ndk-r18bprebuiltwindows-x86_64binmake.exe"正常退出。 07:51:08: Removing directory C:UsersAdministratorPersonalbuild-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Releaseandroid-build/assets 07:51:08: Removing directory C:UsersAdministratorPersonalbuild-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Releaseandroid-build/libs 07:51:08: 正在启动 "C:SkySVNAndroidToolsandroid-ndk-r18b-windows-x86_64android-ndk-r18bprebuiltwindows-x86_64binmake.exe" "INSTALL_ROOT=C:UsersAdministratorPersonalbuild-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Releaseandroid-build" install C:QTQt5.12.25.12.2android_arm64_v8abinqmake.exe -install qinstall -exe libuntitled-1.so C:UsersAdministratorPersonalbuild-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Releaseandroid-buildlibsarm64-v8alibuntitled-1.so 07:51:09: 进程"C:SkySVNAndroidToolsandroid-ndk-r18b-windows-x86_64android-ndk-r18bprebuiltwindows-x86_64binmake.exe"正常退出。 07:51:09: Starting: "C:QTQt5.12.25.12.2android_arm64_v8abinandroiddeployqt.exe" --input C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/android-libuntitled-1.so-deployment-settings.json --output C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/android-build --android-platform android-28 --jdk c:/Java/jdk1.8.0_40_x64 --gradle Generating Android Package Input file: C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/android-libuntitled-1.so-deployment-settings.json Output directory: C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/android-build/ Application binary: C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/libuntitled-1.so Android build platform: android-28 Install to device: No -- Skipping C:/QT/Qt5.12.2/5.12.2/android_arm64_v8a/plugins/iconengines/libqsvgicon.so. It has unmet dependencies: lib/libQt5Svg.so. -- Skipping C:/QT/Qt5.12.2/5.12.2/android_arm64_v8a/plugins/imageformats/libqsvg.so. It has unmet dependencies: lib/libQt5Svg.so. :checkDebugClasspath :preBuild UP-TO-DATE :preDebugBuild :compileDebugAidl :compileDebugRenderscript :checkDebugManifest :generateDebugBuildConfig :prepareLintJar :mainApkListPersistenceDebug :generateDebugResValues :generateDebugResources :mergeDebugResources :createDebugCompatibleScreenManifests :processDebugManifest :splitsDiscoveryTaskDebug :processDebugResources :generateDebugSources :javaPreCompileDebug 注: 某些输入文件使用或覆盖了已过时的 API。 注: 有关详细信息, 请使用 -Xlint:deprecation 重新编译。 :compileDebugJavaWithJavac :compileDebugNdk NO-SOURCE :compileDebugSources :mergeDebugShaders :compileDebugShaders :generateDebugAssets :mergeDebugAssets :transformClassesWithDexBuilderForDebug :transformDexArchiveWithExternalLibsDexMergerForDebug :transformDexArchiveWithDexMergerForDebug :mergeDebugJniLibFolders :transformNativeLibsWithMergeJniLibsForDebug :checkDebugLibraries :processDebugJavaRes NO-SOURCE :transformResourcesWithMergeJavaResForDebug :validateSigningDebug :packageDebug :assembleDebug BUILD SUCCESSFUL in 8s 28 actionable tasks: 28 executed Android package built successfully in 10.445 ms. -- File: C:/Users/Administrator/Personal/build-untitled-1-Android_for_arm64_v8a_Clang_Qt_5_12_2_for_Android_ARM64_v8a-Release/android-build//build/outputs/apk/debug/android-build-debug.apk 07:51:19: 进程"C:QTQt5.12.25.12.2android_arm64_v8abinandroiddeployqt.exe"正常退出。 07:51:19: Elapsed time: 00:11.
搭建和编译过程中，有问题，请留言。
JDK、SDK、NDK的部署包，可以从我的百度网盘上下载。
