将opencv添加到android studio：配置了依赖功能但未设置包ID答案

【问题标题】：Adding opencv to android studio: Dependent features configured but no package ID was set将opencv添加到android studio：配置了依赖功能但未设置包ID
【发布时间】：2020-11-15 07:51:37
【问题描述】：

我正在尝试将 OpenCV 添加到我的 AndroidStudio 项目中。但是，在尝试构建项目时，出现上述错误：“已配置依赖功能，但未设置包 ID。”

我使用以下链接来实现：https://android.jlelse.eu/a-beginners-guide-to-setting-up-opencv-android-library-on-android-studio-19794e220f3c 我无法执行第 5 步，因为没有可供选择的选项。这只是一个空白屏幕。我假设，AndroidStudio 已经自动执行了该步骤。我可以像“Mat”一样从openCv访问对象，但是在构建项目时，我得到了上面提到的错误。

如果您需要更多信息，请告诉我。

【问题讨论】：

标签： java android-studio opencv opencv4android

【解决方案1】：

您好，我也遇到了这个问题。您提供的链接不适用于 opencv 版本 4.+.+。 我发现在 sdk 文件夹 (sdk/build.gradle) 内的 build.gradle 中有一个教程。卸载您的 sdk 并尝试按照 sdk 文件夹中的最新教程进行操作。

// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.

//
// Notes about integration OpenCV into existed Android Studio application project are below (application 'app' module should exist).
//
// This file is located in <OpenCV-android-sdk>/sdk directory (near 'etc', 'java', 'native' subdirectories)
//
// Add module into Android Studio application project:
//
// - Android Studio way:
//   (will copy almost all OpenCV Android SDK into your project, ~200Mb)
//
//   Import module: Menu -> "File" -> "New" -> "Module" -> "Import Gradle project":
//   Source directory: select this "sdk" directory
//   Module name: ":opencv"
//
// - or attach library module from OpenCV Android SDK
//   (without copying into application project directory, allow to share the same module between projects)
//
//   Edit "settings.gradle" and add these lines:
//
//   def opencvsdk='<path_to_opencv_android_sdk_rootdir>'
//   // You can put declaration above into gradle.properties file instead (including file in HOME directory),
//   // but without 'def' and apostrophe symbols ('): opencvsdk=<path_to_opencv_android_sdk_rootdir>
//   include ':opencv'
//   project(':opencv').projectDir = new File(opencvsdk + '/sdk')
//
//
//
// Add dependency into application module:
//
// - Android Studio way:
//   "Open Module Settings" (F4) -> "Dependencies" tab
//
// - or add "project(':opencv')" dependency into app/build.gradle:
//
//   dependencies {
//       implementation fileTree(dir: 'libs', include: ['*.jar'])
//       ...
//       implementation project(':opencv')
//   }
//
//
//
// Load OpenCV native library before using:
//
// - avoid using of "OpenCVLoader.initAsync()" approach - it is deprecated
//   It may load library with different version (from OpenCV Android Manager, which is installed separatelly on device)
//
// - use "System.loadLibrary("opencv_java4")" or "OpenCVLoader.initDebug()"

【讨论】：

【解决方案2】：

我的项目也发生了这种情况，所以我在 java 文件中的 build.gradle 文件中做了一些更改。你也可以试试这个项目文件夹->java->build.gradle 文件

打开这个文件并像这样编辑文件 - 应用插件：'com.android.library'

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.2"

    defaultConfig {
        //applicationId "org.opencv"
        minSdkVersion 16
        targetSdkVersion 29
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

试试这个也许对你有帮助

【讨论】：