Question

I get the following build error:

**** Build of configuration Default for project MyPlugin ****

D:\android-ndk-r8b-windows\android-ndk-r8b\ndk-build.cmd all 
"Compile++ thumb : sampleplugin <= main.cpp

In file included from jni/animation/AnimationThread.h:25:0,
                 from jni/animation/AnimationPlugin.h:27,
                 from jni/main.cpp:31:
jni/RenderingThread.h:26:22: fatal error: SkCanvas.h: No such file or directory
compilation terminated.
make: *** [obj/local/armeabi/objs/sampleplugin/main.o] Error 1

**** Build Finished ****

This is my Android.mk file:

LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)

LOCAL_SRC_FILES := \
    main.cpp \
    PluginObject.cpp \
    RenderingThread.cpp \
    animation/AnimationPlugin.cpp \
    animation/AnimationThread.cpp \
    audio/AudioPlugin.cpp \
    background/BackgroundPlugin.cpp \
    form/FormPlugin.cpp \
    navigation/NavigationPlugin.cpp \
    paint/PaintPlugin.cpp \
    video/VideoPlugin.cpp \
    jni-bridge.cpp \

WEBCORE_PATH := external/webkit/Source/WebCore

LOCAL_C_INCLUDES += \
    $(JNI_H_INCLUDE) \
    $(LOCAL_PATH) \
    $(LOCAL_PATH)/animation \
    $(LOCAL_PATH)/audio \
    $(LOCAL_PATH)/background \
    $(LOCAL_PATH)/form \
    $(LOCAL_PATH)/navigation \
    $(LOCAL_PATH)/paint \
    $(LOCAL_PATH)/nspluginwrapper \
    $(LOCAL_PATH)/video \
    $(WEBCORE_PATH)/bridge \
    $(WEBCORE_PATH)/plugins \
    $(WEBCORE_PATH)/platform/android/JavaVM \
    external/webkit/Source/WebKit/android/plugins \
    external/skia/include/core

LOCAL_SHARED_LIBRARIES := \
    libnativehelper \
    libandroid \
    libutils \
    libcutils \
    libEGL \
    libGLESv2 \
    libskia

LOCAL_CFLAGS += -fvisibility=hidden 


LOCAL_MODULE:= libsampleplugin

LOCAL_MODULE_TAGS := optional

include $(BUILD_SHARED_LIBRARY)

It seems every path needed is specified in the android.mk, and short of copying every header ever into the source jni folder, what are my options? Thanks in advance.

Answer 1

Skia is not part of NDK which is the reason why SkCanvas.h is missing. Judging from your Android.mk you need to build ‘your shared library’ with a full Android tree. It might be possible but since non of the libraries offer a stable API there is no guarantee that what you build will be compatible with different Android versions (since you are using shared libraries).