成功安装Gradle后，Android Release APK崩溃

我将项目迁移到Android Studio。我可以毫不费力地构建应用程序并从Android Studio运行。我可以轻松运行由Android“ Generate Signed APK”选项生成的调试APK。当我要构建发行版APK时，我会运行

 gradle assembleRelease

Gradle完成了所有工作，并以BUILD SUCCESSFUL完成。

当我在设备上安装此发行版APK时，由于缺少（具有讽刺意味的是）Crashlytics的依赖关系，它立即崩溃。我已经按照他们的说明添加了Crashlytics jar。

我对为什么gradle似乎可以正常使用但对于发行版却不满意感到非常困惑。任何建议都非常感谢！

这是主要的build.gradle

apply plugin: 'android'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile 'com.android.support:support-v4:19.0.+'
    compile project(':stripe')

    repositories {
        mavenCentral()
    }
    compile 'com.github.chrisbanes.actionbarpulltorefresh:extra-abs:+'
    compile 'com.actionbarsherlock:actionbarsherlock:4.4.0@aar'

}

android {
    compileSdkVersion 19
    buildToolsVersion '19.0.0'

    signingConfigs {

        release {

            storeFile file(****)
            storePassword "****"
            keyAlias "****"
            keyPassword "****"
        }
    }

    buildTypes {

        release {

            signingConfig signingConfigs.release
        }
    }

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src']
            resources.srcDirs = ['src']
            aidl.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
            lib.srcDirs
        }

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot('tests')

        // Move the build types to build-types/<type>
        // For instance, build-types/debug/java, build-types/debug/AndroidManifest.xml, ...
        // This moves them out of them default location under src/<type>/... which would
        // conflict with src/ being used by the main source set.
        // Adding new build types or product flavors should be accompanied
        // by a similar customization.
        debug.setRoot('build-types/debug')
        release.setRoot('build-types/release')
    }
}

这是stripe的build.gradle：

apply plugin: 'android-library'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
}

android {
    compileSdkVersion 17
    buildToolsVersion "19.0.0"

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = ['src/main/java','src/test/java']
            resources.srcDirs = ['src/main/java','src/test/java']
            aidl.srcDirs = ['src/main/java','src/test/java']
            renderscript.srcDirs = ['src/main/java','src/test/java']
            res.srcDirs = ['res']
            assets.srcDirs = ['assets']
        }

        // Move the tests to tests/java, tests/res, etc...
        instrumentTest.setRoot('tests')
    }
}