于是我运行ProGuard的，第一次，我得到一个奇怪的错误：

 失败：建立失败，一个例外。

* 什么地方出了错：
执行失败的任务：应用程序：proguardRelease。
＆GT; java.io.IOException异常：无法读取[C：\用户\有些\工作区\ MyApp的\程序\ BIN \类]（没有这样的文件或目录）

* 尝试：
与--stacktrace选项获取堆栈跟踪运行。与--info或--debug选项运行，以获得更多的日志输出。
 

下面是我的摇篮：

 应用插件：'机器人'

安卓{
    compileSdkVersion 19
    buildToolsVersion '19 .1.0

    defaultConfig {
        的minSdkVersion 16
        targetSdkVersion 19
        版本code 1
        VERSIONNAME1.0
    }
    buildTypes {
        推出 {
            runProguard真
            proguardFiles getDefaultProguardFile（'ProGuard的-android.txt'），'ProGuard的-rules.txt
        }
    }
}

依赖{
    编译com.android.support:support-v4:19.0.+
    编译com.google.android.gms：播放服务：4.3.23
    编译文件树（导演：库，包括：['的* .jar']）
    编译com.viewpagerindicator：库：2.4.1@aar
    编译组：com.android.support，名称：appcompat-V7，版本：'18 0.0 +。
    编译com.squareup.picasso：毕加索：2.3+
    编译com.github.castorflex.smoothprogressbar：图书馆：0.4.0
}

allprojects {
    gradle.projectsEvaluated {
        tasks.withType（JavaCompile）{
            options.compilerArgs＆LT;＆LT; -Xlint：选中＆LT;＆LT; -Xlint：德precation
        }
    }
}
 

我的ProGuard-rules.txt：

  -injars斌/班
-injars库
-outjars斌/班，processed.jar
-libraryjars /usr/local/java/android-sdk/platforms/android-9/android.jar

-dont preverify
-repackageclasses''
-allowaccessmodification
-optimizations！code /简/算术
-keepattributes *注释*

-keep公共类*扩展android.app.Activity
-keep公共类*扩展android.app.Application
-keep公共类*扩展android.app.Service
-keep公共类*扩展android.content.BroadcastReceiver
-keep公共类*扩展android.content.ContentProvider

-keep公共类*扩展android.view.View {
    公共和LT; INIT＆GT;（android.content.Context）;
    公共和LT; INIT＆GT;（android.content.Context，android.util.AttributeSet）;
    公共和LT; INIT＆GT;（android.content.Context，android.util.AttributeSet，INT）;
    公共无效套*（......）;
}

-keepclasseswithmembers类* {
    公共和LT; INIT＆GT;（android.content.Context，android.util.AttributeSet）;
}

-keepclasseswithmembers类* {
    公共和LT; INIT＆GT;（android.content.Context，android.util.AttributeSet，INT）;
}

-keepclassmembers类*扩展android.content.Context {
   公共无效*（android.view.View）;
   公共无效*（android.view.MenuItem）;
}

-keepclassmembers类*实现android.os.Parcelable {
    静态** CREATOR;
}

-keepclassmembers类** R $ * {
    公共静态＆LT;领域取代;
}

-keepclassmembers类* {
    @ android.webkit.JavascriptInterface＆lt;方法＆GT ;;
}
 

解决方案

Android的摇篮插件已经指定了所有输入和输出你，所以你必须的没有的指定 -injars ， -outjars 或 -libraryjars 。

此外，该文件 ProGuard的-android.txt 在Android SDK中规定的所有通用的Andr​​oid设置为你，所以你不应该再次指定它们。

从本质上讲，你的文件 ProGuard的-rules.txt 可以是空的，除了任何特定应用程序设置，以确保任何反映继续工作。

So I am running ProGuard for the first time and I am getting a weird error:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:proguardRelease'.
> java.io.IOException: Can't read [C:\Users\Some\workspace\MyApp\app\bin\classes] (No such file or directory)

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Here is my gradle:

apply plugin: 'android'

android {
    compileSdkVersion 19
    buildToolsVersion '19.1.0'

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 19
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            runProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
        }
    }
}

dependencies {
    compile 'com.android.support:support-v4:19.0.+'
    compile 'com.google.android.gms:play-services:4.3.23'
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.viewpagerindicator:library:2.4.1@aar'
    compile group:'com.android.support', name:'appcompat-v7', version:'18.0.+'
    compile 'com.squareup.picasso:picasso:2.3+'
    compile 'com.github.castorflex.smoothprogressbar:library:0.4.0'
}

allprojects {
    gradle.projectsEvaluated {
        tasks.withType(JavaCompile) {
            options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation"
        }
    }
}

my proguard-rules.txt:

-injars      bin/classes
-injars      libs
-outjars     bin/classes-processed.jar
-libraryjars /usr/local/java/android-sdk/platforms/android-9/android.jar

-dontpreverify
-repackageclasses ''
-allowaccessmodification
-optimizations !code/simplification/arithmetic
-keepattributes *Annotation*

-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.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*(...);
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers class * extends android.content.Context {
   public void *(android.view.View);
   public void *(android.view.MenuItem);
}

-keepclassmembers class * implements android.os.Parcelable {
    static ** CREATOR;
}

-keepclassmembers class **.R$* {
    public static <fields>;
}

-keepclassmembers class * {
    @android.webkit.JavascriptInterface <methods>;
}

The Android Gradle plugin already specifies all input and output for you, so you must not specify -injars, -outjars, or -libraryjars.

Moreover, the file proguard-android.txt in the Android SDK specifies all generic Android settings for you, so you shouldn't specify them again.

Essentially, your file proguard-rules.txt can be empty, except for any application-specific settings to make sure any reflection continues to work.