java - 使用 Maven 通过 Proguard 缩小 Akka

Question

我正在尝试打包使用 Akka 的应用程序，但收到一条众所周知的错误消息:

[INFO] trouble writing output: Too many method references: 80536; max is 65536.
[INFO] You may try using --multi-dex option.

我发现了一个可以缩小 Akka 库的 proguard 配置: https://bitbucket.org/mackler/safe-metronome/src/16f880347863f560d025016ece19d586fbb9874d/project/proguard.cfg?at=default

我将 Maven build设置为使用类似的配置，但这个 Akka 库似乎并没有缩小。据我了解，要在项目依赖项上应用混淆器，有必要制作一个包含所有依赖项的单个 jar，然后将其加入的 jar 提供给混淆器。

这是我的 Maven 配置:

<dependencies>
        <dependency>
            <groupId>com.google.android</groupId>
            <artifactId>android</artifactId>
            <version>4.1.1.4</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.typesafe.akka</groupId>
            <artifactId>akka-actor_2.10</artifactId>
            <version>2.4-SNAPSHOT</version>
        </dependency>
    </dependencies>

    <build>
        <sourceDirectory>src</sourceDirectory>
        <finalName>${project.artifactId}</finalName>

        <plugins>
            <plugin>
                <groupId>com.jayway.maven.plugins.android.generation2</groupId>
                <artifactId>android-maven-plugin</artifactId>
                <version>3.7.0</version>
                <extensions>true</extensions>
                <configuration>
                    <sdk>
                        <platform>16</platform>
                    </sdk>
                </configuration>
            </plugin>

            <plugin>
                  <artifactId>maven-assembly-plugin</artifactId>
                  <configuration>
                      <descriptorRefs>
                          <descriptorRef>jar-with-dependencies</descriptorRef>
                      </descriptorRefs>
                  </configuration>
                  <executions>
                      <execution>
                          <id>make-assembly</id>
                          <phase>package</phase>
                          <goals>
                              <goal>assembly</goal>
                          </goals>
                      </execution>
                  </executions>
              </plugin>
            <plugin>
                <groupId>com.github.wvengen</groupId>
                <artifactId>proguard-maven-plugin</artifactId>
                <version>2.0.6</version>
                <dependencies>
                    <dependency>
                        <groupId>net.sf.proguard</groupId>
                        <artifactId>proguard-base</artifactId>
                        <version>4.9</version>
                        <scope>runtime</scope>
                    </dependency>
                </dependencies>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>proguard</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <libs>
                        <lib>${java.home}/lib/rt.jar</lib>
                    </libs>
                    <obfuscate>false</obfuscate>
                    <options>
                        <option>@proguard.cfg</option>
                    </options>
                </configuration>
            </plugin>

        </plugins>
    </build>

我做错了什么？

附注dex 工具建议使用“--multi-dex”选项，但我没有找到如何使用 Maven android 插件添加它。有什么解决办法吗？

Answer 1

这是最终有效的配置:

<build>
    <sourceDirectory>src</sourceDirectory>

    <plugins>
        <plugin>
            <groupId>com.jayway.maven.plugins.android.generation2</groupId>
            <artifactId>android-maven-plugin</artifactId>
            <configuration>                 
                <manifest>
                    <debuggable>true</debuggable>
                </manifest>
                <proguard>
                    <config>proguard.cfg</config>
                    <skip>false</skip>
                </proguard>
                <sdk>
                    <platform>16</platform>
                </sdk>
                <test>
                    <skip>true</skip>
                </test>
                <undeployBeforeDeploy>true</undeployBeforeDeploy>
            </configuration>
            <extensions>true</extensions>
        </plugin>
    </plugins>
</build>