Android 正确覆盖proguard选项

我在当前项目中使用ProGuard，并决定尝试优化android配置（使用gradle）：

我没有找到任何关于proguard和android版本所执行的与之兼容的优化的清晰文档：

-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/* 

如果app min sdk版本为11，它们是否为最新版本

所以我决定覆盖它，在

proguard规则中尝试一下。pro

：

-optimizations **
-printconfiguration "result.pro"

但最终的配置并不像我预期的那样。它包含所有合并的规则：

-optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*,**

---

那么，如何在ProGuard中正确地覆盖该选项呢？或者这一行是否等于

-优化**

？

我花了一点时间反复尝试，但最终还是找到了答案。例如，要覆盖默认的ProGuard优化，请应用除代码/简化/算术之外的所有内容，然后：

在ProGuard文件中添加一行

-optimizations

，并使用

*

表示所有。例如，以下行：

-optimizations !code/simplification/arithmetic,*

表示“启用除代码/简化/算术之外的所有优化”。中提供了可用优化列表，您可以使用

*

启用/禁用优化类（例如

！field/*

）

您必须通过交换Gradle文件中

ProGuard rules.pro

和

getdefaultproguard file（'ProGuard-android.txt'）

的顺序，确保在默认ProGuard文件之前加载您的ProGuard规则文件，以便

ProGuard rules.pro

首先出现：

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

现在，输出应该如下所示：

Optimizing...
  Number of finalized classes:                 68
  Number of unboxed enum classes:              1
  Number of vertically merged classes:         0
  Number of horizontally merged classes:       3
  Number of removed write-only fields:         0   (disabled)
  Number of privatized fields:                 58
  Number of inlined constant fields:           375
  Number of privatized methods:                13
  Number of staticized methods:                37
  Number of finalized methods:                 210
  Number of removed method parameters:         290
  Number of inlined constant parameters:       236
  Number of inlined constant return values:    239
  Number of inlined short method calls:        35
  Number of inlined unique method calls:       114
  Number of inlined tail recursion calls:      0
  Number of merged code blocks:                4
  Number of variable peephole optimizations:   723
  Number of arithmetic peephole optimizations: 10
  Number of cast peephole optimizations:       0
  Number of field peephole optimizations:      0
  Number of branch peephole optimizations:     42
  Number of string peephole optimizations:     35
  Number of simplified instructions:           369
  Number of removed instructions:              5019
  Number of removed local variables:           154
  Number of removed exception blocks:          0
  Number of optimized local variable frames:   201

Optimizing...
  Number of finalized classes:                 68
  Number of unboxed enum classes:              1
  Number of vertically merged classes:         0
  Number of horizontally merged classes:       3
  Number of removed write-only fields:         0   (disabled)
  Number of privatized fields:                 58
  Number of inlined constant fields:           375
  Number of privatized methods:                13
  Number of staticized methods:                37
  Number of finalized methods:                 210
  Number of removed method parameters:         290
  Number of inlined constant parameters:       236
  Number of inlined constant return values:    239
  Number of inlined short method calls:        35
  Number of inlined unique method calls:       114
  Number of inlined tail recursion calls:      0
  Number of merged code blocks:                4
  Number of variable peephole optimizations:   723
  Number of arithmetic peephole optimizations: 10
  Number of cast peephole optimizations:       0
  Number of field peephole optimizations:      0
  Number of branch peephole optimizations:     42
  Number of string peephole optimizations:     35
  Number of simplified instructions:           369
  Number of removed instructions:              5019
  Number of removed local variables:           154
  Number of removed exception blocks:          0
  Number of optimized local variable frames:   201