代码混淆

第一步：

修改proguard-rules.pro,选下面其中一个混淆规则，加入这个文件的最后一行比如-optimizationpasses 5

#指定代码的压缩级别-optimizationpasses 5#包明不混合大小写-dontusemixedcaseclassnames#不去忽略非公共的库类-dontskipnonpubliclibraryclasses #优化  不优化输入的类文件-dontoptimize #预校验-dontpreverify #混淆时是否记录日志-verbose # 混淆时所采用的算法-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*#保护注解-keepattributes *Annotation*# 保持哪些类不被混淆-keep public class * extends android.app.Fragment-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 com.android.vending.licensing.ILicensingService#如果有引用v4包可以添加下面这行-keep public class * extends android.support.v4.app.Fragment#忽略警告-ignorewarning#####################记录生成的日志数据,gradle build时在本项目根目录输出#################apk 包内所有 class 的内部结构-dump class_files.txt#未混淆的类和成员-printseeds seeds.txt#列出从 apk 中删除的代码-printusage unused.txt#混淆前后的映射-printmapping mapping.txt#####################记录生成的日志数据，gradle build时 在本项目根目录输出-end################################混淆保护自己项目的部分代码以及引用的第三方jar包library##########################-libraryjars libs/umeng-analytics-v5.2.4.jar#-libraryjars libs/alipaysdk.jar#-libraryjars libs/alipaysecsdk.jar#-libraryjars libs/alipayutdid.jar#-libraryjars libs/wup-1.0.0-SNAPSHOT.jar#-libraryjars libs/weibosdkcore.jar#三星应用市场需要添加:sdk-v1.0.0.jar,look-v1.0.1.jar#-libraryjars libs/sdk-v1.0.0.jar#-libraryjars libs/look-v1.0.1.jar#我是以libaray的形式引用了一个图片加载框架,如果不想混淆 keep 掉-keep class com.nostra13.universalimageloader.** { *; }#友盟-keep class com.umeng.**{*;}#支付宝-keep class com.alipay.android.app.IAliPay{*;}-keep class com.alipay.android.app.IAlixPay{*;}-keep class com.alipay.android.app.IRemoteServiceCallback{*;}-keep class com.alipay.android.app.lib.ResourceMap{*;}#信鸽推送-keep class com.tencent.android.tpush.**  {* ;}-keep class com.tencent.mid.**  {* ;}#自己项目特殊处理代码#忽略警告-dontwarn com.veidy.mobile.common.**#保留一个完整的包-keep class com.veidy.mobile.common.** {*;}-keep class  com.veidy.activity.login.WebLoginActivity{*;}-keep class  com.veidy.activity.UserInfoFragment{*;}-keep class  com.veidy.activity.HomeFragmentActivity{*;}-keep class  com.veidy.activity.CityActivity{*;}-keep class  com.veidy.activity.ClinikActivity{*;}#如果引用了v4或者v7包-dontwarn android.support.**############混淆保护自己项目的部分代码以及引用的第三方jar包library-end##################-keep public class * extends android.view.View {    public <init>(android.content.Context);    public <init>(android.content.Context, android.util.AttributeSet);    public <init>(android.content.Context, android.util.AttributeSet, int);    public void set*(...);}#保持 native 方法不被混淆-keepclasseswithmembernames class * {    native <methods>;}#保持自定义控件类不被混淆-keepclasseswithmembers class * {    public <init>(android.content.Context, android.util.AttributeSet);}#保持自定义控件类不被混淆-keepclasseswithmembers class * {    public <init>(android.content.Context, android.util.AttributeSet, int);}#保持自定义控件类不被混淆-keepclassmembers class * extends android.app.Activity {   public void *(android.view.View);}#保持 Parcelable 不被混淆-keep class * implements android.os.Parcelable {  public static final android.os.Parcelable$Creator *;}#保持 Serializable 不被混淆-keepnames class * implements java.io.Serializable#保持 Serializable 不被混淆并且enum 类也不被混淆-keepclassmembers class * implements java.io.Serializable {    static final long serialVersionUID;    private static final java.io.ObjectStreamField[] serialPersistentFields;    !static !transient <fields>;    !private <fields>;    !private <methods>;    private void writeObject(java.io.ObjectOutputStream);    private void readObject(java.io.ObjectInputStream);    java.lang.Object writeReplace();    java.lang.Object readResolve();}#保持枚举 enum 类不被混淆 如果混淆报错，建议直接使用上面的 -keepclassmembers class * implements java.io.Serializable即可#-keepclassmembers enum * {#  public static **[] values();#  public static ** valueOf(java.lang.String);#}-keepclassmembers class * {    public void *ButtonClicked(android.view.View);}#不混淆资源类-keepclassmembers class **.R$* {    public static <fields>;}#避免混淆泛型 如果混淆报错建议关掉#–keepattributes Signature#移除log 测试了下没有用，还是建议自己定义一个开关控制是否输出日志#-assumenosideeffects class android.util.Log {#    public static boolean isLoggable(java.lang.String, int);#    public static int v(...);#    public static int i(...);#    public static int w(...);#    public static int d(...);#    public static int e(...);#}

第二步：

将上图显示的文件夹中build.gradle(Module:app)中的minifyEnabled false改成minifyEnabled true允许混淆！

    buildTypes {        release {            minifyEnabled false            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'        }    }