在 Android Studio 中使用OpenCV所遇到問題

編輯：關於Android編程

Android Studio 中使用OpenCV所遇到問題

一、關於如何生成.h文件

網上查了很多資料，大部分都是說需要切換到build/intermediates/classes/debug/文件目下，然後怎麼搞怎麼搞，其實不必要，也不用配置-classpath的環境變量。

直接從 Terminal 裡切換進入 / src / main / java 目錄，執行javah命令，然後包名 + 類名，生成的.h文件便會在該路徑下，如圖：

二、遇到錯誤：

Error:Execution failed for task ':app:compileDebugNdk'.
> com.android.ide.common.process.ProcessException:org.gradle.process.internal.ExecException: Process 'command '
C:\Tools\adt-bundle-windows-x86_64-20140702\android-ndk-r10c\ndk-build.cmd'' finished with non-zero exit value 2

1. May be this is known NDK bug. Try to add empty .c file to your jni dir (like empty.c).

2. Try adding this to the build.gradle file:

android {
	...
	sourceSets.main {
	   jni.srcDirs = [ ]
	}


}

注：可能是NDK的Bug，在編譯時，還必須在jni目錄生成一個空的.c文件。

三、遇到錯誤

Error:Error: NDK integration is deprecated in the current plugin.  Consider trying the new experimental plugin.  For details, see http://tools.android.com/tech-docs/new-build-system/gradle-experimental.  Set android.useDeprecatedNdk=true in gradle.properties to continue using the current NDK integration.

http://stackoverflow.com/questions/31979965/after-updating-android-studio-to-version-1-3-0-i-am-getting-ndk-integration-is

Here is how to solve this issue :

add gradle.properties file to root folder of your project

add 'android.useDeprecatedNdk=true' to gradle.properties file

Here is my gradle.properties :

# Project-wide Gradle settings.

# IDE (e.g. Android Studio) users:
# Gradle settings configured through the IDE *will override*
# any settings specified in this file.

# For more details on how to configure your build environment visit
# http://www.gradle.org/docs/current/userguide/build_environment.html

# Specifies the JVM arguments used for the daemon process.
# The setting is particularly useful for tweaking memory settings.
# Default value: -Xmx10248m -XX:MaxPermSize=256m
# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8

# When configured, Gradle will run in incubating parallel mode.
# This option should only be used with decoupled projects. More details, visit
# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
# org.gradle.parallel=true

android.useDeprecatedNdk=true

And add it to root of your project :

And rebuild your project.

四、遇到錯誤

com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'C:Program FilesJavajdk1.8.0_60injava.exe'' finished with non-zero exit value 2

導致原因：項目中出現了重復的依賴。刪除依賴項便可很容易地解決該問題。

關於Android編程