Android Studio 利用Gradle来混淆代码

其实代码混淆是个比较复杂的工程，我今天记下的，算是一个小心得，因为正在改bug,还没时间来去研究它是神马东东。

主要注意一点，在build.gradle里面写配置的时候，高版本的Gradle已经不能用runProguard true这个方法了，

因为如果用它，build的时候会报错。

高版本的gradle用minifyEnable true

如下：

   buildTypes{
        debug{
            signingConfig  signingConfigs.HetConfig
        }

        release {
            signingConfig  signingConfigs.HetConfig
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'),'proguard-project.txt'
        }
    }

最后在proguard-project.txt中加入下面的代码：

# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# Add project specific ProGuard rules here.
# By default, the flags in this file are appended to flags specified
# in ${sdk.dir}/tools/proguard/proguard-android.txt
# You can edit the include path and order by changing the ProGuard
# include property in project.properties.
#
# For more details, see
#   http://developer.android.com/guide/developing/tools/proguard.html

# Add any project specific keep options here:

# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
#   public *;
#}
-dontskipnonpubliclibraryclasses
-verbose
-ignorewarnings

-optimizationpasses 5          # 指定代码的压缩级别
-dontusemixedcaseclassnames   # 是否使用大小写混合
-dontpreverify           # 混淆时是否做预校验
-verbose                # 混淆时是否记录日志

-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*  # 混淆时所采用的算法

-keep public class * extends android.app.Activity      # 保持哪些类不被混淆
-keep public class * extends android.app.Application   # 保持哪些类不被混淆
-keep public class * extends android.app.Service       # 保持哪些类不被混淆
-keep public class * extends android.content.BroadcastReceiver  # 保持哪些类不被混淆
-keep public class * extends android.content.ContentProvider    # 保持哪些类不被混淆
-keep public class * extends android.app.backup.BackupAgentHelper # 保持哪些类不被混淆
-keep public class * extends android.preference.Preference        # 保持哪些类不被混淆
-keep public class com.android.vending.licensing.ILicensingService    # 保持哪些类不被混淆

-keepclasseswithmembernames class * {  # 保持 native 方法不被混淆
    native ;
}
-keepclasseswithmembers class * {   # 保持自定义控件类不被混淆
    public (android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * {# 保持自定义控件类不被混淆
    public (android.content.Context, android.util.AttributeSet, int);
}
-keepclassmembers class * extends android.app.Activity { # 保持自定义控件类不被混淆
    public void *(android.view.View);
}
-keepclassmembers enum * {     # 保持枚举 enum 类不被混淆
    public static **[] values();
    public static ** valueOf(java.lang.String);
}
-keep class * implements android.os.Parcelable { # 保持 Parcelable 不被混淆
    public static final android.os.Parcelable$Creator *;
}

在第三方jar包处理上比较麻烦。待这个版本上线了，我再来仔细研究下，到时再来完善