android studio rc3.0 升级，编译问题解决办法

参考官网： https://developer.android.com/studio/build/gradle-plugin-3-0-0-migration.html

一、版本升级

1. gradle升级到4.1
2. android gradle plugin升级到3.0.0
3. buildToolsVersion 升级到26.0.2
4. compileSdkVersion升级到26
5. 加入google()仓库

  ##gradle升级到4.1

distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip

buildscript {
    repositories {
        jcenter()
        mavenLocal()
        google() //##加入google()仓库

    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'//android gradle plugin升级到3.0.0

    }
}

allprojects {

    repositories {
        jcenter()
        mavenLocal()
        google()//##加入google()仓库

    }

}

 

android {
    compileSdkVersion 26 //##compileSdkVersion升级到26

    buildToolsVersion '26.0.2' //##buildToolsVersion 升级到26.0.2

  }

 

二、build.gradle加入flavorDimension

• flavorDimension定义

 android {
   flavorDimensions "tier", "minApi" //##flavorDimension定义，且需要都是用上

    productFlavors {
        
        dev {
            minSdkVersion 14
            dimension "minApi" //##flavorDimension使用
        }
        prod {
            minSdkVersion 14
            dimension "tier" 
        }

        wandoujia {
            dimension "tier"
        }
    }
}

 

 

三、support-v4包升级

•  com.android.support-v4升级到26.1.2
• android.enableAapt2=false

 compile 'com.android.support:support-v4:26.1.0'

　　

##gradle-wrapper.properties
android.enableAapt2=false

　　

四、包找不到

• 找不到类：android.util.FloatMath.sqrt()

##Math.sqrt()替换
FloatMath.sqrt(squaredNorm);
=>
(float)Math.sqrt(squaredNorm)

• 找不到类：org.apach.util.encodingUtils

compile 'org.apache.httpcomponents:httpcore:4.4.4'

• 找不到类：android.support.v4.view.KeyEventCompat;

KeyEventCompat.hasNoModifiers(event)
=>
event.hasNoModifiers() //event是KeyEvent对象

• 找不到类：org.apache.http.conn.util.InetAddressUtils;

           String ip = getLocalIpAddress();
            if (!InetAddressUtils.isIPv4Address(ip)) {
                return mac_s;
            }
            InetAddress ipAddress = InetAddress.getByName(ip);
            if (ipAddress == null) {
                return mac_s;
            }

=>
            String ip = getLocalIpAddress();
            InetAddress ipAddress = InetAddress.getByName(ip);
            if (ipAddress.getAddress().length != 4) {
                return mac_s;
            }
            if (ipAddress == null) {
                return mac_s;
            }