如果引用的第三方库的支持库版本低于(或者不一致)app build.gradle中的支持库版本，可能会出现如下问题：

all com.android.support libraries must use the exact same version specification(mixing versions can lead to runtime crashes)

如下图所示：

去改第三方库所用的支持库版本比较麻烦，如果用的库很多的话工作量很大。这个时候我们可以考虑强制让所有模块都用相同的支持库版本。

在app build.gradle中添加：

configurations.all{

resolutionStrategy.eachDependency{ DependencyResolveDetails details ->

def requested = details.requested

if (requested.group == 'com.android.support') {

if (!requested.name.startsWith("multidex")) {

details.useVersion '26.1.0'

}

}

}

}

其中，27.1.1就是你要使用的支持库版本号，你可以根据需要改成其它的。附上 build.gradle 文件

apply plugin: 'com.android.library'

apply plugin: 'com.jakewharton.butterknife'

android {

compileSdkVersion 27

defaultConfig {

minSdkVersion 21

targetSdkVersion 27

versionCode 1

versionName "1.0"

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

}

buildTypes {

release {

minifyEnabled false

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

}

}

//强制让所有模块都用相同的支持库版本

configurations.all {

resolutionStrategy.eachDependency { DependencyResolveDetails details ->

def requested = details.requested

if (requested.group == 'com.android.support') {

if (!requested.name.startsWith("multidex")) {

details.useVersion '27.1.1'

}

}

}

}

}

dependencies {

implementation fileTree(include: ['*.jar'], dir: 'libs')

testImplementation 'junit:junit:4.12'

api 'com.android.support.test:runner:1.0.2'

api 'com.android.support.test.espresso:espresso-core:3.0.2'

api 'com.android.support.constraint:constraint-layout:1.1.3'

implementation project(':mavo-annotations')

//Android Support包

api 'com.android.support:design:27.1.1'

api 'com.android.support:appcompat-v7:27.1.1'

api 'com.android.support:support-v4:27.1.1'

//字体图标

api 'com.joanzapata.iconify:android-iconify-ionicons:2.2.2'

api 'com.joanzapata.iconify:android-iconify-fontawesome:2.2.2'

//fragmentation

api 'me.yokeyword:fragmentation:1.3.6'

api 'me.yokeyword:fragmentation-swipeback:1.3.6'

//Butter Knife

api 'com.jakewharton:butterknife:8.8.1'

annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'

//网络请求依赖

api 'com.squareup.okio:okio:1.13.0'

api 'com.squareup.okhttp3:okhttp:3.8.1'

api 'com.squareup.retrofit2:retrofit:2.3.0'

api 'com.squareup.retrofit2:converter-scalars:2.3.0'

//AVLoadingIndicatorView

api 'com.wang.avi:library:2.1.3'

//JSON依赖Android版

api 'com.alibaba:fastjson:1.1.57.android'

//banner依赖

api 'com.bigkoo:convenientbanner:2.0.5'

api 'com.ToxicBakery.viewpager.transforms:view-pager-transforms:1.2.32@aar'

//Log

api 'com.orhanobut:logger:2.1.1'

//数据库依赖

api 'org.greenrobot:greendao-generator:3.2.2'

api 'org.greenrobot:greendao:3.2.2'

}