Android App + Library 与 appcompat 版本冲突

Question

我正在开发一个带有库（Android 模块）Lib 的应用程序 App。他们在不交互时没有问题：导入库后，Android Studio 搞砸了build.gradle 设置，我无法恢复。

我必须以 Android 4.4 为目标 - 仅此而已。 appcompat 库已安装，并且对它的依赖项已添加到应用程序和库中（我遵循本指南：https://developer.android.com/tools/support-library/setup.html）

这是模块的build.gradle：app（对应于应用程序App）：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 19
    buildToolsVersion "21.1.2"

    defaultConfig {
        applicationId "it.mydomain.myapp"
        minSdkVersion 19
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }

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

dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     compile 'com.android.support:appcompat-v7:21.0.3'
     compile project(':mylib.mydomain.it')
}

这是图书馆的build.gradle：

apply plugin: 'com.android.library'

android {
    compileSdkVersion 19
    buildToolsVersion "21.1.2"

    defaultConfig {
        minSdkVersion 19
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }

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

        debug {
            debuggable true
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:21.0.3'
    compile 'com.google.android.gms:play-services:6.5.87'
}

当我开始项目时，Android Studio 不知何故在 gradle 脚本中放置了错误的 API 级别（或者可能是我忽略了一个步骤）。创建项目后，我在应用程序和库中都有 API 级别 21。我修改了两个 gradle 脚本以使用 API 级别 19，执行了几次 clean/rebuild/build 和其他随机尝试。构建项目时我仍然遇到这些错误：

Error:(50, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.

Error:(1) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material'.

Error:(1) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Caption'.

和其他 98 个类似的：都与主题问题有关。

还有其他消息，指的是v11、v14等值：

/.../build/intermediates/exploded-aar/com.android.support/appcompat-v7/21.0.3/res/values-v11/values.xml
Error:(50, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(50, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(50, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(50, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
/.../build/intermediates/exploded-aar/com.android.support/appcompat-v7/21.0.3/res/values-v14/values.xml
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
Error:(9, 21) No resource found that matches the given name: attr 'android:actionModeShareDrawable'.
/.../build/intermediates/exploded-aar/com.android.support/appcompat-v7/21.0.3/res/values-v21/values.xml
Error:(1) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material'.
Error:(1) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Body1'.
Error:(1) Error retrieving parent for item: No resource found that matches the given name 'android:TextAppearance.Material.Body2'.

Answer 1

'com.android.support:appcompat-v7:21.0.3' 需要 API 21。

您必须使用 API 21 编译您的项目。使用：

compileSdkVersion 21