中星6b本振频率,形象墙设计,安吉拉baby
前面总结过两种方式进行Android ndk开发,今天再介绍一种利用AndroidStudio进行ndk开发的方式,和系列二中的方式差不多,不过不需要编译Android.mk和Application.mk,更为简单。
利用《[Android jni开发系列(二)]AndroidStudio移植eclipse NDK项目开发》中配置的javah命令,生成包含native方法java类j对应jni头文件,编写对应的c文件,不清楚地方可查看前一篇文章
此时直接编译会出现下面错误:
Error:Execution failed for task ':app:compileDebugNdk'. > Error: Your project contains C++ files but it is not using a supported native build system. Consider using CMake or ndk-build integration with the stable Android Gradle plugin: https://developer.android.com/studio/projects/add-native-code.html or use the experimental plugin: https://developer.android.com/studio/build/experimental-plugin.html.
解决方法:在gradle.properties添加如下行
android.useDeprecatedNdk=true
此时就可以直接编译使用了,此时生成的so库名称为libapp.so,如需修改so名称,需要在build.gradle中配置,如下:
defaultConfig { applicationId "com.jason.jni.demo1" minSdkVersion 21 targetSdkVersion 26 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" ndk { moduleName "ndk_test" } }
另外需要注意的是,如果在ndk下配置了abiFilters,还需要考虑当前ndk版本是否支持,否则编译时候会出现下面错误:
Android NDK: The armeabi ABI is no longer supported. Use armeabi-v7a. Android NDK: NDK Application 'local' targets unknown ABI(s): armeabi Android NDK: Please fix the APP_ABI definition in C:/Users/yinjb/AppData/Local/Android/Sdk/ndk-bundle/build//../build/core/default-application.mk C:/Users/yinjb/AppData/Local/Android/Sdk/ndk-bundle/build//../build/core/setup-app.mk:79: *** Android NDK: Aborting . Stop. :app:compileDebugNdk FAILED FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:compileDebugNdk'. > com.android.ide.common.process.ProcessException: Error while executing process C:\Users\yinjb\AppData\Local\Android\Sdk\ndk-bundle\ndk-build.cmd with arguments {NDK_PROJECT_PATH=null APP_BUILD_SCRIPT=F:\github\JniDemo1\app\build\intermediates\ndk\debug\Android.mk APP_PLATFORM=android-26 NDK_OUT=F:\github\JniDemo1\app\build\intermediates\ndk\debug\obj NDK_LIBS_OUT=F:\github\JniDemo1\app\build\intermediates\ndk\debug\lib APP_ABI=armeabi-v7a,armeabi,x86} * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED
完整的build.gradle如下:
apply plugin: 'com.android.application' android { compileSdkVersion 26 buildToolsVersion "26.0.0" defaultConfig { applicationId "com.jason.jni.demo1" minSdkVersion 21 targetSdkVersion 26 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" ndk { moduleName "ndk_test" ldLibs "log", "z", "m" abiFilters "armeabi", "armeabi-v7a", "x86" //ndk 版本不能用最新的,本人测试android-ndk-r15c可以,其它的没试 // abiFilters "armeabi-v7a", "x86" //ndk版本17.0.4640043 rc1不支持armeabi,否则编译会出现上面错误 } } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:26.+' compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' }
三种方式的jni开发demo下载
如对本文有疑问,请在下面进行留言讨论,广大热心网友会与你互动!! 点击进行留言回复
Android studio 解决logcat无过滤工具栏的操作
Android Studio 恢复小窗口停靠模式(Docked Mode)
Android studio保存logcat日志到本地的操作
Android Studio快捷键生成TAG、Log.x日志输出介绍
网友评论