android.mk（多个android.mk）调用+动态注册android.mk

源码链接

 

 

添加个cpp文件后要Refresh Linked C++ Projects

 

 

用gradle-ndk-build:

import org.apache.tools.ant.taskdefs.condition.Os

android {
    compileSdkVersion versionCompiler
    buildToolsVersion versionBuildTool

    compileOptions {
        sourceCompatibility javaSourceCompatibility
        targetCompatibility javaTargetCompatibility
    }

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion versionTarget
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }

    sourceSets {
        main {
            jniLibs.srcDir 'src/main/libs'
            jni.srcDirs = []
        }
    }

    lintOptions {
        abortOnError false
    }
//    externalNativeBuild {
//        ndkBuild {
//            path 'src/main/jni/Android.mk'
//        }
//    }
}

tasks.withType(JavaCompile) {
    compileTask -> compileTask.dependsOn ndkBuild
}

String getNdkBuildPath() {
    Properties properties = new Properties()
    properties.load(project.rootProject.file('local.properties').newDataInputStream())
    def ndkBuildingDir = properties.getProperty("ndk.dir")
    def ndkBuildPath = ndkBuildingDir
    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
        ndkBuildPath = ndkBuildingDir + '/ndk-build.cmd'
    } else {
        ndkBuildPath = ndkBuildingDir + '/ndk-build'
    }
    return ndkBuildPath
}

task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
    println('executing ndkBuild')
    def ndkBuildPath = getNdkBuildPath();
    commandLine ndkBuildPath, '-j8', '-C', file('src/main').absolutePath
}

task ndkClean(type: Exec, description: 'clean JNI libraries') {
    println('executing ndkBuild clean')
    def ndkBuildPath = getNdkBuildPath();
    commandLine ndkBuildPath, 'clean', '-C', file('src/main').absolutePath
}

clean.dependsOn 'ndkClean'

dependencies {
    implementation fileTree(dir: new File(buildDir, 'libs'), include: '*.jar')

    implementation "com.android.support:support-v4:${supportLibVersion}"
    implementation "com.android.support:support-annotations:${supportLibVersion}"

    implementation("com.serenegiant:common:${commonLibVersion}") {
        exclude module: 'support-v4'
    }
}

通过Gradle搭建NDK环境，坏处不能debug,不能f3到源码处（如上上面gradle配置）；

通过NDKBuild搭建NDK环境（重点介绍，如下gradle配置）-》

 

apply plugin: 'com.android.library'
/*
 *  UVCCamera
 *  library and sample to access to UVC web camera on non-rooted Android device
 *
 * Copyright (c) 2014-2017 saki [email protected]
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 *
 *  All files in the folder are under this Apache License, Version 2.0.
 *  Files in the libjpeg-turbo, libusb, libuvc, rapidjson folder
 *  may have a different license, see the respective files.
 */

//import org.apache.tools.ant.taskdefs.condition.Os

android {
    compileSdkVersion versionCompiler
    buildToolsVersion versionBuildTool

    compileOptions {
        sourceCompatibility javaSourceCompatibility
        targetCompatibility javaTargetCompatibility
    }

    defaultConfig {
        minSdkVersion 14
        targetSdkVersion versionTarget
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }

//    sourceSets {
//        main {
//            jniLibs.srcDir 'src/main/libs'
//            jni.srcDirs = []
//        }
//    }
//
//    lintOptions {
//        abortOnError false
//    }
    externalNativeBuild {
        ndkBuild {
            path 'src/main/jni/Android.mk'
        }
    }
}

//tasks.withType(JavaCompile) {
//    compileTask -> compileTask.dependsOn ndkBuild
//}
//
//String getNdkBuildPath() {
//    Properties properties = new Properties()
//    properties.load(project.rootProject.file('local.properties').newDataInputStream())
//    def ndkBuildingDir = properties.getProperty("ndk.dir")
//    def ndkBuildPath = ndkBuildingDir
//    if (Os.isFamily(Os.FAMILY_WINDOWS)) {
//        ndkBuildPath = ndkBuildingDir + '/ndk-build.cmd'
//    } else {
//        ndkBuildPath = ndkBuildingDir + '/ndk-build'
//    }
//    return ndkBuildPath
//}
//
//task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
//    println('executing ndkBuild')
//    def ndkBuildPath = getNdkBuildPath();
//    commandLine ndkBuildPath, '-j8', '-C', file('src/main').absolutePath
//}
//
//task ndkClean(type: Exec, description: 'clean JNI libraries') {
//    println('executing ndkBuild clean')
//    def ndkBuildPath = getNdkBuildPath();
//    commandLine ndkBuildPath, 'clean', '-C', file('src/main').absolutePath
//}
//
//clean.dependsOn 'ndkClean'

dependencies {
    implementation fileTree(dir: new File(buildDir, 'libs'), include: '*.jar')

    implementation "com.android.support:support-v4:${supportLibVersion}"
    implementation "com.android.support:support-annotations:${supportLibVersion}"

    implementation("com.serenegiant:common:${commonLibVersion}") {
        exclude module: 'support-v4'
    }
}

通过NDKBuild搭建NDK环境》(好处可以实现f3源码和debug调试)。

注意针对多文件夹下的多android.mk文件，需要一个总的android.mk,下面为子android.mk,

 

通过Gradle搭建NDK环境时，总的android.mk为：

#include $(call all-subdir-makefiles)
PROJ_PATH  := $(call my-dir)
include $(CLEAR_VARS)
include $(PROJ_PATH)/UVCCamera/Android.mk
include $(PROJ_PATH)/libjpeg-turbo-1.5.0/Android.mk
include $(PROJ_PATH)/libusb/android/jni/Android.mk
include $(PROJ_PATH)/libuvc/android/jni/Android.mk

通过NDKBuild搭建NDK环境时，总的android.mk为：

PROJ_PATH := $(call my-dir)

include $(CLEAR_VARS)

include $(PROJ_PATH)/UVCCamera/Android.mk

include $(PROJ_PATH)/libjpeg-turbo-1.5.0/Android.mk include $(PROJ_PATH)/libusb/android/jni/Android.mk

include $(PROJ_PATH)/libuvc/android/jni/Android.mk

（即少了#include $(call all-subdir-makefiles)）。