在构建APK Android Studio时生成签名APK:错误

Question

我无法使用minifyEnabled true和生成签名APKshrinkResources true

应用级别:build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
    }
}
apply plugin: 'com.android.application'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 23
    buildToolsVersion '22.0.1'

    defaultConfig {
        applicationId "......."
        minSdkVersion 14
        targetSdkVersion 21
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        debug {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

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

    configurations {
        compile.exclude group: "org.apache.httpcomponents", module: "httpclient"
    }
}

dependencies {
    compile 'com.android.support:design:23.0.1'
    compile 'com.android.support:cardview-v7:23.0.1'
    compile 'com.android.support:recyclerview-v7:23.0.1'
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.squareup.picasso:picasso:2.5.2'
    compile 'com.google.apis:google-api-services-youtube:v3-rev149-1.20.0'
    compile 'com.google.http-client:google-http-client-android:1.20.0'
    compile 'com.google.api-client:google-api-client-android:1.20.0'
    compile 'com.google.api-client:google-api-client-gson:1.20.0'
    compile files('libs/YouTubeAndroidPlayerApi.jar')
    compile 'com.github.clans:fab:1.6.2'
}

消息查看

Information:Gradle tasks [:app:assembleRelease]
:app:preBuild UP-TO-DATE
:app:preReleaseBuild UP-TO-DATE
:app:checkReleaseManifest
:app:preDebugBuild UP-TO-DATE
:app:prepareComAndroidSupportAppcompatV72301Library UP-TO-DATE
:app:prepareComAndroidSupportCardviewV72301Library UP-TO-DATE
:app:prepareComAndroidSupportDesign2301Library UP-TO-DATE
:app:prepareComAndroidSupportRecyclerviewV72301Library UP-TO-DATE
:app:prepareComAndroidSupportSupportV42301Library UP-TO-DATE
:app:prepareComGithubClansFab162Library UP-TO-DATE
:app:prepareReleaseDependencies
:app:compileReleaseAidl
:app:compileReleaseRenderscript
:app:generateReleaseBuildConfig
:app:generateReleaseAssets UP-TO-DATE
:app:mergeReleaseAssets
:app:generateReleaseResValues UP-TO-DATE
:app:generateReleaseResources
:app:mergeReleaseResources
:app:processReleaseManifest
:app:processReleaseResources
:app:generateReleaseSources
:app:processReleaseJavaRes UP-TO-DATE
:app:compileReleaseJavaWithJavac
Note: .....YouTubeRecyclerViewFragment.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: ....GetPlaylistAsyncTask.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
:app:compileReleaseNdk UP-TO-DATE
:app:compileReleaseSources
:app:proguardRelease UP-TO-DATE
:app:dexRelease
:app:shrinkReleaseResources
Removed unused resources: Binary resource data reduced from 741KB to 402KB: Removed 45%
Note: If necessary, you can disable resource shrinking by adding
android {
    buildTypes {
        release {
            shrinkResources false
        }
    }
}
:app:validateExternalOverrideSigning
:app:packageRelease FAILED
Error:Execution failed for task ':app:packageRelease'.
> Unable to compute hash of ....\app\build\intermediates\classes-proguard\release\classes.jar
Information:BUILD FAILED
Information:Total time: 7.45 secs
Information:1 error
Information:0 warnings
Information:See complete output in console

Answer 1

你来了

Removed unused resources: Binary resource data reduced from 741KB to 402KB: Removed 45%
Note: If necessary, you can disable resource shrinking by adding
android {
    buildTypes {
        release {
            shrinkResources false
        }
    }
}
:app:validateExternalOverrideSigning
:app:packageRelease FAILED
Error:Execution failed for task ':app:packageRelease'.

资源缩减仅适用于代码收缩.

minifyEnabled是一个Android工具,可以在构建它时减小应用程序的大小.

android {

    buildTypes {
        release {
            shrinkResources true // This must be first 
            minifyEnabled true   // This must be after shrinkResources 
            proguardFiles getDefaultProguardFile('proguard-android.txt'),
                    'proguard-rules.pro'
        }
    }
}

如果您还没有使用minifyEnabled构建应用程序来进行代码收缩,那么在启用shrinkResources之前尝试一下,因为您可能需要编辑proguard-rules.pro文件以保留在开始删除之前动态创建或调用的类或方法资源.

请阅读关于收缩您的代码和资源的官方指南

忠告

使用最新版本

compileSdkVersion 25
buildToolsVersion '25.0.1'
targetSdkVersion 25
compile 'com.android.support:appcompat-v7:25.1.0' // set other 25.1.0

注意

YouTubeRecyclerViewFragment.java uses or overrides a deprecated API.

使用备用最新版本.

Answer 2

这:app:proguardRelease UP-TO-DATE..使得这个日志不够完整，无法说明这个答案是否有帮助。

请再次执行 clean + build release 以获取所有步骤的完整日志，您可能还想添加--info到 gradle 选项，甚至--debug在 gradle 构建日志中获取更多诊断消息。

Clean+build 还可能修复一些奇怪的问题，即 gradle/other-tool 无法正确更新某些文件并重用旧的错误文件 - 很少发生。

还尝试关闭缩小（不是解决方案，只是实验），是否有帮助（定位问题实际上是通过 proguard 缩小而不是在其他地方）。

当然，如果在缩小过程中出现与 proguard 相关的错误，请尝试遵循链接答案中的建议。