android-opencv 版本下JNI Android.mk文件的书写
不能利用 include $(all-subdir-makefiles)
会报重复引用的错误。
Android NDK: Trying to define local module 。。。opencv。故放弃采取分文件夹写.mk文件的策略。
参考以下工程：
http://code.google.com/p/android-opencv-panorama/source/browse/android/pano/jni/Android.mk
解决方案如下：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
OPENCV_CAMERA_MODULES:= off
include ../includeOpenCV.mk
ifeq ("$(wildcard $(OPENCV_MK_PATH))","")
#try to load OpenCV.mk from default install location
include $(TOOLCHAIN_PREBUILT_ROOT)/user/share/OpenCV/OpenCV.mk
else
include $(OPENCV_MK_PATH)
endif
NEAR_C_INCLUDES := $(LOCAL_C_INCLUDES)
NEAR_STATIC_LIBRARIES := $(LOCAL_STATIC_LIBRARIES)
NEAR_CFLAGS := $(LOCAL_CFLAGS)
########################
第一个。。。
############第二个############
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := $(NEAR_C_INCLUDES)
LOCAL_STATIC_LIBRARIES := $(NEAR_STATIC_LIBRARIES)
LOCAL_CFLAGS := $(NEAR_CFLAGS)
。。。
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
P:
Java.lang.UnsatisfiedLinkError.
cannot load library:...Ans:
Best guess with what information you have provided, The library you are trying to load needs some dependencies to be loaded before it.
For example:
System.loadLibrary("bullet");
System.loadLibrary("irrlicht");
System.loadLibrary("gamescript");
gamescript library needs other 2 library to be loaded before it. Otherwise, it gives me the same error you have mentioned.
若为动态库， 需要注意在java层代码里加载相关的每个动态库！！！
| /** |
| * Loads Native Libraries |
| */ |
| static{ |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libprecomp.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libutil.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libmatchers.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libautocalib.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libblenders.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libexposure_compensate.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libmotion_estimators.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libseam_finders.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libwarpers.so"); |
| System.load("/data/data/net.pandorica.opencv.pano/lib/libopencv_stitcher.so"); |
| } |
若为静态库， 注意必须是+=，要不然报错！
Be careful with the following line, it should be like this:
LOCAL_STATIC_LIBRARIES+=libfastcv
not like
LOCAL_STATIC_LIBRARIES := libfastcv
类似：
http://stackoverflow.com/questions/7346580/problem-using-opencv2-3-1-with-android-native-activity
I solved the problem there. It was my fault (as usual xD) the problem was I was writting in my Android.mk this line: LOCAL_STATIC_LIBRARIES := android_native_app_glue, instead of this line: LOCAL_STATIC_LIBRARIES += android_native_app_glue. I needed the "plus" symbol, in order to add the new library and not deleting the previously loaded. Thanks anyway!!
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
siox error:
expected unqualified-id before numeric constant -Y _D 变量重新命名，用_YPoint _DPoint 代替！
今天编译库的时候出现这个问题unqualified-id before numeric constant，是因为变量重复定义了，主要是变量与宏定义同名了，及以下模式：
一个头文件定义一个接口体，
class XXXClass｛
const static int MAX_PATTERN_NUM = 1024;
｝
然后在另外一个文件定义宏如下：
#define MAX_PATTERN_NUM 100
这时就会出现以上的错误
Linux gcc 编译出错 “expected unqualified-id before numeric constant ”
原因很可能是所有大写的名字常常被用于预处理宏，真的需要采用常用的习惯的命名原则，不然真不好查。
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Installation error: INSTALL_FAILED_INSUFFICIENT_STORAGE
解决办法：1. 把以前的早版本 apk文件卸载 进入菜单
settings->applications->mange
applications-> select theapplication->select "unistall".
2.
把以前的apk文件都给删除了。删除方法：命令 进入tools文件夹下，
adb shell
cd data
cd app
ls,就可以看见之前的apk文件，用rm文件名，就可以把它删除。（模拟器要处在运行的状态下）
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Android用ImageView显示本地和网上的图片
/**
* 加载本地图片
* http://bbs.3gstdy.com
* @param url
* @return
*/
public static Bitmap getLoacalBitmap(String url) {
try {
FileInputStream fis = new FileInputStream(url);
return BitmapFactory.decodeStream(fis);
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
}
}