Android Gradle-Can'；t使用模块'的查找类；s包括lib

本项目由3个模块组成（应用程序、datecs e截击）。

datecs

模块是库

libs/com.datecs.api.jar

之间的接口。问题是库类/包在应用程序模块中不可见

以下是gradle文件：

project.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

buildscript {
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
    }
}

dependencies {
    implementation files('libs/gson-2.3.1.jar')
    implementation project(':volley')
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    implementation project(':datecs')
}

apply plugin: 'com.android.library'

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

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

dependencies {
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    testImplementation 'junit:junit:4.12'
    implementation files('libs/com.datecs.api.jar')
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

app.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

buildscript {
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
    }
}

dependencies {
    implementation files('libs/gson-2.3.1.jar')
    implementation project(':volley')
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    implementation project(':datecs')
}

apply plugin: 'com.android.library'

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

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

dependencies {
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    testImplementation 'junit:junit:4.12'
    implementation files('libs/com.datecs.api.jar')
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

datecs.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'com.android.application'

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
        checkReleaseBuilds false
        abortOnError false
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

buildscript {
    repositories {
        jcenter()
        google()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'
    }
}

dependencies {
    implementation files('libs/gson-2.3.1.jar')
    implementation project(':volley')
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    implementation project(':datecs')
}

apply plugin: 'com.android.library'

buildscript {
    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

android {
    compileSdkVersion 21
    buildToolsVersion '28.0.3'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

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

dependencies {
    androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation 'com.android.support:support-v4:21.0.3'
    implementation 'com.android.support:appcompat-v7:21.0.3'
    testImplementation 'junit:junit:4.12'
    implementation files('libs/com.datecs.api.jar')
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

---

如何使库类在应用程序模块中可访问？

由于我无法访问您的特定库（datecs），因此我使用应用程序模块和库模块进行了测试，其中应用程序模块需要“导入”com.android中的

。支持：appcompat-v7:28.0.0'

依赖项

使用

api

而不是

implementation

对我来说很管用

应用程序模块的build.gradle中的依赖项关闭：

dependencies {
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation project(':mytestlibrary')
}

库模块的build.gradle中的依赖项关闭：

dependencies {
    api 'com.android.support:appcompat-v7:28.0.0'
}

另请参见关于api的文档：

Gradle将依赖项添加到编译类路径和生成输出中。当一个模块包含一个api依赖项时，它会让Gradle知道该模块想要将该依赖项以传递方式导出到其他模块，以便它们在运行时和编译时都可以使用该依赖项