1.在项目app下面的build.gradle启动

buildTypes {

    //开发环境
    debug {
        signingConfig signingConfigs.release
        //是否混淆,开发是选否
        minifyEnabled false
        //是否输出日志
        buildConfigField 'boolean', 'IS_DEBUG', 'true'
        //对应服务器地址
        buildConfigField 'String', 'SERVER_URL', '"http://*************app/api/"'
    }
    //生产环境
    release {
        signingConfig signingConfigs.release
        //混淆
        minifyEnabled true
        // 移除无用的resource文件
        shrinkResources true
        //Zipalign优化
        zipAlignEnabled true
        proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
        // 不显示Log
        buildConfigField 'boolean', 'IS_DEBUG', 'false'
        buildConfigField 'String', 'SERVER_URL', '"http://*************app/api/"'
    }
}

2.proguard-rules.pro是studio自带的反编译混淆文件，在项目project的app目录下

3.proguard-rules.pro文件下的内容

#---------------------------------基本指令区----------------------------------
-ignorewarnings
-dontusemixedcaseclassnames
-verbose
-optimizationpasses 5
-dontskipnonpubliclibraryclassmembers
-printmapping proguardMapping.txt
-optimizations !code/simplification/cast,!field/*,!class/merging/*
-keepattributes *Annotation*,InnerClasses
-keepattributes Signature
-keepattributes SourceFile,LineNumberTable
#---------------------------------默认保留区---------------------------------
#继承activity,application,service,broadcastReceiver,contentprovider....不进行混淆
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.support.multidex.MultiDexApplication
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class * extends android.view.View
-keep public class com.android.vending.licensing.ILicensingService
-keep class android.support.** {*;}
-keepclassmembers class * {
    void *(*Event);
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
#// natvie 方法不混淆
-keepclasseswithmembernames class * {
    native <methods>;
}
#这个主要是在layout 中写的onclick方法android:onclick="onClick"，不进行混淆
-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}
#资源文件
-keep class **.R$* {
 *;
}
#---------------------------------webview------------------------------------
-keepclassmembers class fqcn.of.javascript.interface.for.Webview {
   public *;
}
-keepclassmembers class * extends android.webkit.WebViewClient {
    public void *(android.webkit.WebView, java.lang.String, android.graphics.Bitmap);
    public boolean *(android.webkit.WebView, java.lang.String);
}
-keepclassmembers class * extends android.webkit.WebViewClient {
    public void *(android.webkit.WebView, jav.lang.String);
}
#---------------------------------实体类---------------------------------
#修改成你对应的包名--com.v.b.app
-keep class com.v.b.app.** { *; }
-keep class com.v.b.mvp.model.** { *; }
-keep class com.v.b.mvp.base.** { *; }
-keep class com.v.b.mvp.paramet.** { *; }


## nineoldandroids-2.4.0.jar
-keep public class com.nineoldandroids.** {*;}

#fastJson-----阿里巴巴的fastjson，数据解析，用gson的可以去找gson代替这里
-dontwarn com.alibaba.fastjson.**
-keep class com.alibaba.fastjson.** { *; }

-keepclassmembers class * implements java.io.Serializable {
    static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}
-keep public class * implements java.io.Serializable {*;}

# support-v4
#https://stackoverflow.com/questions/18978706/obfuscate-android-support-v7-widget-gridlayout-issue
-dontwarn android.support.v4.**
-keep class android.support.v4.app.** { *; }
-keep interface android.support.v4.app.** { *; }
-keep class android.support.v4.** { *; }


# support-v7
-dontwarn android.support.v7.**
-keep class android.support.v7.internal.** { *; }
-keep interface android.support.v7.internal.** { *; }
-keep class android.support.v7.** { *; }

# support design
#@link http://stackoverflow.com/a/31028536
-dontwarn android.support.design.**
-keep class android.support.design.** { *; }
-keep interface android.support.design.** { *; }
-keep public class android.support.design.R$* { *; }
#glide
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public enum com.bumptech.glide.load.resource.bitmap.ImageHeaderParser$** {
  **[] $VALUES;
  public *;
}
#retrofit2.x
-dontwarn retrofit2.**
-keep class retrofit2.** { *; }
-keepattributes Signature
-keepattributes Exceptions

#Rxjava RxAndroid
-dontwarn rx.*
-dontwarn sun.misc.**

-keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
   long producerIndex;
   long consumerIndex;
}

-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueProducerNodeRef {
    rx.internal.util.atomic.LinkedQueueNode producerNode;
}

-keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueConsumerNodeRef {
    rx.internal.util.atomic.LinkedQueueNode consumerNode;
}

#okhttp
-dontwarn okhttp3.**
-keep class okhttp3.**{*;}


#okio
-dontwarn okio.**
-keep class okio.**{*;}
-keep class com.orhanobut.logger.**{*;}

-keep class com.zhongshuku.classroom2.**{*;}
#Parcelable
-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

#友盟混淆设置------我用的友盟分享，导入的友盟moudel在友盟官网可以找到

-dontshrink
-dontoptimize
-dontwarn com.google.android.maps.**
-dontwarn android.webkit.WebView
-dontwarn com.umeng.**
-dontwarn com.tencent.weibo.sdk.**
-dontwarn com.facebook.**
-keep public class javax.**
-keep public class android.webkit.**
-dontwarn android.support.v4.**
-keep enum com.facebook.**
-keepattributes Exceptions,InnerClasses,Signature
-keepattributes *Annotation*
-keepattributes SourceFile,LineNumberTable

-keep public interface com.facebook.**
-keep public interface com.tencent.**
-keep public interface com.umeng.socialize.**
-keep public interface com.umeng.socialize.sensor.**
-keep public interface com.umeng.scrshot.**

-keep public class com.umeng.socialize.* {*;}


-keep class com.facebook.**
-keep class com.facebook.** { *; }
-keep class com.umeng.scrshot.**
-keep public class com.tencent.** {*;}
-keep class com.umeng.socialize.sensor.**
-keep class com.umeng.socialize.handler.**
-keep class com.umeng.socialize.handler.*
-keep class com.umeng.weixin.handler.**
-keep class com.umeng.weixin.handler.*
-keep class com.umeng.qq.handler.**
-keep class com.umeng.qq.handler.*
-keep class UMMoreHandler{*;}
-keep class com.tencent.mm.sdk.modelmsg.WXMediaMessage {*;}
-keep class com.tencent.mm.sdk.modelmsg.** implements com.tencent.mm.sdk.modelmsg.WXMediaMessage$IMediaObject {*;}
-keep class im.yixin.sdk.api.YXMessage {*;}
-keep class im.yixin.sdk.api.** implements im.yixin.sdk.api.YXMessage$YXMessageData{*;}
-keep class com.tencent.mm.sdk.** {
   *;
}
-keep class com.tencent.mm.opensdk.** {
   *;
}
-keep class com.tencent.wxop.** {
   *;
}
-keep class com.tencent.mm.sdk.** {
   *;
}
-dontwarn twitter4j.**
-keep class twitter4j.** { *; }

-keep class com.tencent.** {*;}
-dontwarn com.tencent.**
-keep class com.kakao.** {*;}
-dontwarn com.kakao.**
-keep public class com.umeng.com.umeng.soexample.R$*{
    public static final int *;
}
-keep public class com.linkedin.android.mobilesdk.R$*{
    public static final int *;
}
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class com.tencent.open.TDialog$*
-keep class com.tencent.open.TDialog$* {*;}
-keep class com.tencent.open.PKDialog
-keep class com.tencent.open.PKDialog {*;}
-keep class com.tencent.open.PKDialog$*
-keep class com.tencent.open.PKDialog$* {*;}
-keep class com.umeng.socialize.impl.ImageImpl {*;}
-keep class com.sina.** {*;}
-dontwarn com.sina.**
-keep class  com.alipay.share.sdk.** {
   *;
}

-keepnames class * implements android.os.Parcelable {
    public static final ** CREATOR;
}

-keep class com.linkedin.** { *; }
-keep class com.android.dingtalk.share.ddsharemodule.** { *; }
-keepattributes Signature