Android studio中調試C++代碼

在AS中調試C++代碼還是很快很方便的，以下是本人總結的步驟，希望對大家有所幫助。

lib庫下如果有好幾個分庫的話，每個分庫都要建立Android/jni目錄，存放Android.mk建立規則：

######################################################################
# 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庫下幾個lib庫存在的jni目錄中編寫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庫下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
}

這樣就可以點擊 build/make project 按鈕編譯生成so了。

當然也可以在工程目錄下的build.gradle 

compile project(':libuvccamera')

最後別忘了在總工程的Settings.gradle中：

include ':libuvccamera'
include ':usbCameraTest'