在Android Studio中构建后，APK大小增加了

Question

建造后APK大小增加，apk尺寸从3 mb增加到20mb。它是由于在圆圈中看到的lib。如何删除这些lib文件？

https://i.stack.imgur.com/6ZCp5.png

apply plugin: 'com.android.application'

    android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "csdevbin.dua"
        minSdkVersion 15
        targetSdkVersion 27
        versionCode 6
        versionName "4.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            debuggable false
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }

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

我的依赖

implementation 'com.android.support:appcompat-v7:27.0.2'
implementation 'com.android.support:design:27.0.2'
implementation 'com.google.android.gms:play-services-ads:11.0.2'
implementation 'com.android.support.constraint:constraint-layout:1.0.0-beta4'
testCompile 'junit:junit:4.12'
implementation 'com.google.firebase:firebase-core:11.0.2'
implementation 'com.startapp:inapp-sdk:3.6.7'
implementation 'com.github.barteksc:android-pdf-viewer:2.8.1'
implementation 'com.android.support:cardview-v7:27.0.2'