寫JNI + Java程式的時候, 有個函式總感覺不對, 想寫個測試程式測試下這個函式. 以前是直接在Jeallybean下面編譯的, 為現有的板子為jeallybean整非ARM的編譯環境也太那個了點, 心想就直接用NDK唄. 然後, 麻煩來了! 


1. 如通常一樣,寫hello.cpp測試程式碼
2. ndk-build, 出現NDK_PROJECT_PATH錯誤:
   Android NDK: Could not find application project directory !   
   Android NDK: Please define the NDK_PROJECT_PATH variable to point to it.  
3. Google+度娘, 好像沒有人說過怎麼處理呢
4. 記得做opencv的時候解決過這個問題, 想想...
5. 想起來了,
   mkdir jni
   mv *.mk ./jni
   mv *.c  ./jni
   mv *.h  ./jni
   mv *.cpp ./jni
   ndk-build


   ## 編譯通過, enjoy it.
   adb push ../libs/x86/hello /data/
   adb shell /data/hello


   ## 測試結果顯示該函式工作正確, 繼續想想 ...


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附錄一: Application.mk
---------------------------------------------------------
APP_STL := stlport_static 
# APP_STL := gnustl_static
APP_CPPFLAGS := -frtti -fexceptions
APP_ABI := x86


---------------------------------------------------------
附錄二: Android.mk
---------------------------------------------------------

# Copyright (C) 2009 The Android Open Source Project
#
# 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.
#
LOCAL_PATH := $(call my-dir)

include $(CLEAR_VARS)


LOCAL_C_INCLUDES += \
    libstdc++ \
    sources/cxx-stl/stlport
LOCAL_SHARED_LIBRARIES := \
    libcutils \
    libutils \
    libstlport


LOCAL_MODULE    := hello 
LOCAL_SRC_FILES := hello.cpp
LOCAL_LDLIBS    := -lm -llog


include $(BUILD_EXECUTABLE)