Android studio中调试C++代码

在AS中调试C++代码还是很快很方便的，以下是本人总结的步骤，希望对大家有所帮助。

lib库下如果有好几个分库的话，每个分库都要建立Android/jni目录，存放Android.mk建立规则：

######################################################################
# libuvc_static.a (static library with static link to libjpeg, libusb1.0)
######################################################################
LOCAL_PATH := $(call my-dir)/../..
include $(CLEAR_VARS)

LOCAL_C_INCLUDES += \
$(LOCAL_PATH)/.. \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/include/libuvc

LOCAL_EXPORT_C_INCLUDES := \
$(LOCAL_PATH)/ \
$(LOCAL_PATH)/include \
$(LOCAL_PATH)/include/libuvc

LOCAL_CFLAGS := $(LOCAL_C_INCLUDES:%=-I%)
LOCAL_CFLAGS += -DANDROID_NDK
LOCAL_CFLAGS += -DLOG_NDEBUG

LOCAL_EXPORT_LDLIBS := -llog

LOCAL_ARM_MODE := arm

LOCAL_STATIC_LIBRARIES += jpeg-turbo1400_static
LOCAL_SHARED_LIBRARIES += usb100

LOCAL_SRC_FILES := \
src/ctrl.c \
src/device.c \
src/diag.c \
src/frame.c \
src/frame-mjpeg.c \
src/init.c \
src/stream.c

LOCAL_MODULE := libuvc_static
include $(BUILD_STATIC_LIBRARY)

######################################################################
# libuvc.so (shared library with static link to libjpeg-turbo)
######################################################################
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_EXPORT_LDLIBS += -llog

LOCAL_WHOLE_STATIC_LIBRARIES = libuvc_static

LOCAL_MODULE := uvc
include $(BUILD_SHARED_LIBRARY)

lib库下几个lib库存在的jni目录中编写Android.mk文件和Application.mk：

Android.mk:

#include $(call all-subdir-makefiles)
PROJ_PATH  := $(call my-dir)
include $(CLEAR_VARS)
include $(PROJ_PATH)/UVCCamera/Android.mk
include $(PROJ_PATH)/libjpeg-turbo-1.4.0/Android.mk
include $(PROJ_PATH)/libusb/android/jni/Android.mk
include $(PROJ_PATH)/libuvc/android/jni/Android.mk

Application.mk:

APP_PLATFORM := android-14
#APP_ABI := armeabi armeabi-v7a mips x86
APP_ABI := armeabi armeabi-v7a arm64-v8a
#APP_OPTIM := debug
APP_STL := gnustl_static
APP_OPTIM := release

在lib库下build.gradle：

apply plugin: 'com.android.library'
import org.apache.tools.ant.taskdefs.condition.Os

android {
compileSdkVersion 22
buildToolsVersion "22.0.1"

defaultConfig {
minSdkVersion 14
targetSdkVersion 22
}

buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
sourceSets {
main {
jniLibs.srcDir 'src/main/libs'
jni.srcDirs = []
}
}
}

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

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

task ndkBuild(type: Exec, description: 'Compile JNI source via NDK') {
println('executing ndkBuild')
def ndkBuildingDir = project.plugins.findPlugin('com.android.library').sdkHandler.getNdkFolder().absolutePath
def ndkBuildPath = ndkBuildingDir
if (Os.isFamily(Os.FAMILY_WINDOWS)) {
ndkBuildPath = ndkBuildingDir + '/ndk-build.cmd'
} else {
ndkBuildPath = ndkBuildingDir + '/ndk-build'
}
commandLine ndkBuildPath, '-j8', '-C', file('src/main').absolutePath
}

这样就可以点击 build/make project 按钮编译生成so了。

当然也可以在工程目录下的build.gradle 

compile project(':libuvccamera')

最后别忘了在总工程的Settings.gradle中：

include ':libuvccamera'
include ':usbCameraTest'