先来一个混淆规则基本模板，可以直接复制粘贴的那种~~

#1.基本指令区（固定）
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-verbose
-ignorewarnings
-printmapping proguardMapping.txt
-optimizations !code/simplification/cast,!field/*,!class/merging/*
-keepattributes *Annotation*,InnerClasses
-keepattributes Signature
-keepattributes SourceFile,LineNumberTable

#2.默认保留区（固定）
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-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.** {*;}
-keep public class * extends android.support.v4.**
-keep public class * extends android.support.v7.**
-keep public class * extends android.support.annotation.**

-keep class **.R$* {
 *;
}

-keepclasseswithmembernames class * {
    native <methods>;
}
-keepclassmembers class * extends android.app.Activity{
    public void *(android.view.View);
}
-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
-keep public class * extends android.view.View{
    *** get*();
    void set*(***);
    public <init>(android.content.Context);
    public <init>(android.content.Context, android.util.AttributeSet);
    public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
    public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}
-keepclassmembers class * implements java.io.Serializable {
 static final long serialVersionUID;
    private static final java.io.ObjectStreamField[] serialPersistentFields;
    !static !transient <fields>;
    !private <fields>;
    !private <methods>;
    private void writeObject(java.io.ObjectOutputStream);
    private void readObject(java.io.ObjectInputStream);
    java.lang.Object writeReplace();
    java.lang.Object readResolve();
}
-keepclassmembers class * {
    void *(**On*Event);
    void *(**On*Listener);
}

#3.webview（固定）
-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);
}

需要我们不混淆的代码

以下4项中如果有则必须添加否则可能不能正常运行的
（1）实体类，json解析类，其实就是用到序列化反序列化的类，最好将所有解析类放在一个包下

-keep class com.xx.xx.entity.** { *; }
-keep class com.xx.xx.entity.* { *; }
-keep class com.xx.xx.entity.Aa { *; }

-keep public class * extends com.xx.xx.entity.Aa

（2）第三方jar包，一般三方提供者会给出，去官网找。

（3）与js互相调用的类

（4）反射相关的类和方法

用法

在app的build.gradle中添加

    buildTypes {
        release {
            //正式打包的混淆开关
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            //测试打包的混淆开关，debug混淆只有 Build APK 才生效，直接 Run 是无效的
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }