android-ndk

问题 I am running the video camera using the OpenCV function. I pass the Mat object to the jni function it works for awhile, them the error: 10-10 13:03:17.978: A/libc(28693): Fatal signal 11 (SIGSEGV), code 1, fault addr 0x9 in tid 28791 (Thread-5418) Java code that runs the camera and calls the jni function: package com.adhamenaya; import java.util.ArrayList; import org.opencv.android.BaseLoaderCallback; import org.opencv.android.CameraBridgeViewBase; import org.opencv.android

问题 I want to develop an android application about Auto crop in a scanned image or photo by using OpenCV. I found an open source application name "android-opencv-scan-doc" on github. After I downloaded, try to build and run this project on my computer. The application can not start and gives the following exception: Information:Gradle tasks [:app:clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies, :app

问题 I have to use a native library (this is not my decision). The library already has a JNI wrapper, and the example Android NDK code works. But the library initialization routines return native handles and the developer is required to correctly close them . Now, there's an interesting question: where to call the close_handle routines from? At least in theory, each incorrect termination may result in temporary files left somewhere on the disk or some other kind of resource leak. Library

问题 I'm building a bucnh of libraries using ndk-build. At some point, a mk file could be included twice, as it imports 3rd party libraries, I protected double-import using a global variable: # Importing nlopt! # Prevent warnings reporting module was imported twice: ifneq ($(imported_nlopt_$(TARGET_ARCH_ABI)),true) imported_nlopt_$(TARGET_ARCH_ABI) := true ifeq ($(APP_OPTIM),debug) # Importing static library nlopt_debug: include $(CLEAR_VARS) LOCAL_MODULE := nlopt_debug LOCAL_SRC_FILES := nlopt

问题 What I want to achieve is to use to spinners to select from town and then to town and then to retrieve the distance and time of travel that i have defined in my dist.js file. It works great when i use html in webview. but I don't want to use webview. Therefore how can i get the two spinners to calculate this? Okay have tried but still nothing works. here is my code so far. Can you tell what i am doing wrong? import java.io.BufferedReader; import java.io.InputStream; import java.io

问题 I want to play sound through opensl. Connected library Linker-> Input-> Library Dependencies - OpenSLES. The linker produces an error - undefined reference to slCreateEngine. 回答1: check your target_link_libraries method inside CmakeLists.txt if it has all the necessary libraries included.. target_link_libraries( # Specifies the target library. native-lib android log OpenSLES) 来源： https://stackoverflow.com/questions/40849737/undefined-reference-to-slcreateengine

问题 I had compiled the PCL-SuperBuild folder as these links described: Link 1: https://hcteq.wordpress.com/2014/07/14/compiling-pcl-for-android-in-windows-cmake-gui/# Link 2: http://www.hirotakaster.com/weblog/how-to-build-pcl-for-android-memo/ It Completed successfully. However, I don't know how to use the library in my project, Can anyone elaborate in this? I'm trying to run the code in https://github.com/roomplan/tango-examples-java.git, the Point Cloud with PCL one, and I have tried to write

问题 Getting error when trying to compile Linphone Native Library using NDK G:\WorkSpaces\Demo\LinphoneLauncherActivity>G:\android-ndk-r8d-windows\android-n dk-r8d\ndk-build Build X264 plugin for mediastreamer2 "Compile arm : vpx <= vpx_mem.c In file included from jni/..//submodules/externals/build/libvpx/../../libvpx/vpx _mem/vpx_mem.c:18:0: jni/..//submodules/externals/build/libvpx/../../libvpx/vpx_mem/include/vpx_mem_i ntrnl.h:14:24: fatal error: vpx_config.h: No such file or directory

问题 After some experiments I compiled Mono 4.4.2 for Android x86_64 (Marshmallow) using Android NDK r13b. I had to do some tricks, but after all I had these folders in my build directory: bin etc include lib share The bin folder looks like : The lib folder is: The lib folder contains only unmanaged libs, e.g. the 'mono' subfolder doesn't contain managed BCL for each version of the framework, I couldn't figure out how to tell to 'configure' script to do this. So I've compiled the same version of

问题 In my Makefile, I want to check if a certain file exists, do something, and check again. Using gnu make, I cannot. Here is the simple example: $(info $(wildcard OK)) $(shell touch OK) $(info $(wildcard OK)) If I run make once, I see two empty lines. If I run make again, both lines are OK . I thought, maybe $(eval) will let me get the updated answer. Alas, $(eval $$(info $$(wildcard OK))) produces the same answer, as if make has some way to predict all wildcard calculations before it starts