将Tesseract和Opencv添加到Android.mk (Android.mk)

Question

我按照这里的指示成功地添加了OpenCV。但我也一直试图将tesseract添加到Android.mk中，已经有几天了，但一直未能做到这一点。

我有一个使用tesseract的android.cpp，所以我必须在我的Android.mk中包含这个依赖项。我找到了几乎完全有问题的这个职位，他解决了它将libtess.so和liblept.so文件导入Android.mk，但没有解释如何做到这一点，所以我查看并找到了显示如何链接预构建库的这个职位。基于此，我尝试了这个Android.mk：

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SHARED_LIBRARIES := libtess
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl

include $(BUILD_SHARED_LIBRARY)

得到了这个输出：

[armeabi-v7a] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : liblept.so => src/main/jniLibs/armeabi-v7a/liblept.so
[armeabi-v7a] Compile++ thumb: run_detection <= text_detect.cpp
In file included from src/main/jni/text_detect.h:4:0,
                 from src/main/jni/text_detect.cpp:10:
src/main/jni/../../../../tess-two/jni/com_googlecode_tesseract_android/src/api/baseapi.h:32:22: fatal error: platform.h: No such file or directory
 #include "platform.h"
                      ^
compilation terminated.

因此，我猜不是正确地链接libtess，如果仔细观察，它从来没有安装libtess.so，它看起来像是安装了liblept.so，然后跳转到text_detect.cpp，忽略了这一部分：

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

所以我试着强迫它安装liblept和libtess，然后再把它放在不同的文件中。因此，我将文件的最后一部分放在另一个文件夹中的另一个Android.mk中，并尝试包含$(调用所有-subdir-makefiles)，然后它完全安装libtess和liblept，但忽略了调用所有subdir-makefiles。

新的jni文件夹结构：

Android.mk
Application.mk
text_detect/
     Android.mk
     android.cpp
     text_detect.cpp
     text_detect.h

Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/../../../../tess-two/jni
include $(PREBUILT_SHARED_LIBRARY)

include $(call all-subdir-makefiles)

文本检测/Android.mk

LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)

OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SHARED_LIBRARIES := libtess
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl

include $(BUILD_SHARED_LIBRARY)

这是输出：

[armeabi-v7a] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : liblept.so => src/main/jniLibs/armeabi-v7a/liblept.so
[armeabi-v7a] Prebuilt       : libtess.so <= src/main/jni/../libs/armeabi-v7a/
[armeabi-v7a] Install        : libtess.so => src/main/jniLibs/armeabi-v7a/libtess.so
[armeabi] Prebuilt       : liblept.so <= src/main/jni/../libs/armeabi/
[armeabi] Install        : liblept.so => src/main/jniLibs/armeabi/liblept.so
[armeabi] Prebuilt       : libtess.so <= src/main/jni/../libs/armeabi/
[armeabi] Install        : libtess.so => src/main/jniLibs/armeabi/libtess.so
[mips] Prebuilt       : liblept.so <= src/main/jni/../libs/mips/
[mips] Install        : liblept.so => src/main/jniLibs/mips/liblept.so
[mips] Prebuilt       : libtess.so <= src/main/jni/../libs/mips/
[mips] Install        : libtess.so => src/main/jniLibs/mips/libtess.so
[x86] Prebuilt       : liblept.so <= src/main/jni/../libs/x86/
[x86] Install        : liblept.so => src/main/jniLibs/x86/liblept.so
[x86] Prebuilt       : libtess.so <= src/main/jni/../libs/x86/
[x86] Install        : libtess.so => src/main/jniLibs/x86/libtess.so

正如您所看到的，它完美地安装了第一个Android.mk中的所有东西，但是它从未运行文本检测/Android.mk。

我做错什么了？我怎么能完成这个看似如此简单的任务呢？有更简单的方法吗？

编辑：

在@ph0b响应之后，我回到了我的第一个安装程序，并添加了与原始Makefiles相同的原始Makefiles(有几个变体使它适应我的路径)，这就解决了这个问题。它找不到platform.h，因为它不知道在哪里能找到它。

现在，在我做了这个更改之后，我有一个不同的错误No such file or directory #include "com_googlecode_tesseract_android/src/api/baseapi.h"，我认为这是因为它没有在依赖于它的run_detection之前编译tesseract。好吧，这不是问题，它仍然在tesseract之前编译run_detection，但这不是问题，它非常简单，我觉得花了那么多时间在这个错误上太愚蠢了。问题是它没有找到com_googlecode_tesseract_android/src/api/baseapi.h，因为我也没有提供路径，所以我从苔丝-2复制了com_googlecode_tesseract_android和com_googlecode_leptonica_android，并将$(LOCAL_PATH)添加到LOCAL_EXPORT_C_INCLUDES中。这是我的最后解决方案：

jni文件夹结构：

Android.mk
Application.mk
text_detect.cpp
android.cpp
text_detect.h
com_googlecode_leptonica_android
com_googlecode_tesseract_android

Android.mk

LOCAL_PATH := $(call my-dir)

#leptonica
LEPTONICA_LOCAL := $(LOCAL_PATH)/com_googlecode_leptonica_android
LEPTONICA_PATH := $(LEPTONICA_LOCAL)/src

include $(CLEAR_VARS)

LOCAL_MODULE := liblept
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/liblept.so
LOCAL_EXPORT_C_INCLUDES := \
  $(LEPTONICA_LOCAL) \
  $(LEPTONICA_PATH)/src

include $(PREBUILT_SHARED_LIBRARY)

#tesseract
TESSERACT_LOCAL := $(LOCAL_PATH)/com_googlecode_tesseract_android
TESSERACT_PATH := $(TESSERACT_LOCAL)/src

include $(CLEAR_VARS)

LOCAL_MODULE := libtess
LOCAL_SRC_FILES := ../libs/$(TARGET_ARCH_ABI)/libtess.so
LOCAL_EXPORT_C_INCLUDES := \
  $(LOCAL_PATH) \
  $(TESSERACT_PATH)/api \
  $(TESSERACT_PATH)/ccmain \
  $(TESSERACT_PATH)/ccstruct \
  $(TESSERACT_PATH)/ccutil \
  $(TESSERACT_PATH)/classify \
  $(TESSERACT_PATH)/cube \
  $(TESSERACT_PATH)/cutil \
  $(TESSERACT_PATH)/dict \
  $(TESSERACT_PATH)/opencl \
  $(TESSERACT_PATH)/neural_networks/runtime \
  $(TESSERACT_PATH)/textord \
  $(TESSERACT_PATH)/viewer \
  $(TESSERACT_PATH)/wordrec \
  $(LEPTONICA_PATH)/src \
  $(TESSERACT_LOCAL)
LOCAL_SHARED_LIBRARIES := liblept

include $(PREBUILT_SHARED_LIBRARY)

#opencv
include $(CLEAR_VARS)
OPENCV_PACKAGE_DIR:= /Users/danielsierraf/Documents/OpenCV-2.4.10-android-sdk/sdk
OPENCV_CAMERA_MODULES := off
include $(OPENCV_PACKAGE_DIR)/native/jni/OpenCV.mk

LOCAL_MODULE    := run_detection
LOCAL_SRC_FILES := text_detect.cpp android.cpp
LOCAL_LDLIBS    += -landroid -llog -ldl
LOCAL_SHARED_LIBRARIES += libtess liblept

include $(BUILD_SHARED_LIBRARY)

Answer 1

最近的安装失败了，ndk-build至少应该尝试编译您的模块。当在all-subdir-makefiles之前定义了ndk模块时，它可能会出现错误，而且它也找不到模块的Android.mk。您可以尝试只在顶级include $(call all-subdir-makefiles)中使用Android.mk。

无论如何，我认为您应该回到您的第一个设置，您的模块直接在jni根文件夹。然后，您的主要问题是正确声明包含路径。苔丝-二号/jni不包含任何标题？他们在tess-two/jni/com_googlecode_*_android/src/*。这意味着您需要在模块声明中列出这些内容，方法是提供LOCAL_EXPORT_C_INCLUDES变量的所有绝对路径(如原始Makefiles：android/Android.mk#L33)。

您还需要在libtess：LOCAL_SHARED_LIBRARIES := liblept库声明中添加liblept上的依赖项。

如果仍然失败，还有另一种可能性:与使用生成的.so文件重新定义libtess和liblept模块不同，您可以直接包含tess-two/jni/Android.mk并使用与tess-2相同的Application.mk (copy `tess-2/jni/Application.mk)。它将正确定义libtess和liblept模块。