如何在android的proguard中保持类内的公共接口

Question

我在android应用程序中有一个AB类。这个类有一个公共接口INF。当我尝试在启用proguard的情况下进行发布构建时，它会显示

错误:找不到符号类INF

在我的proguard.cfg文件中，我添加了以下几行：

-keep public interface com.some.somemore.AB$INF {*;}
-keep class com.some.somemore.AB {*;}

请帮助解释为什么会出现此错误。

public class AB {

public interface INF {
    public void Ready();
    public void Error(int error);
    public void Click();
    public void Complete();
    public void Dismiss();
}

}

以下是崩溃日志

E/AndroidRuntime: FATAL EXCEPTION: main
                                               Process: com.sliq.android.sliq, PID: 14828
                                               java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sliq.android.sliq/org.nexage.sourcekit.vast.activity.VASTActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.nexage.sourcekit.vast.a.e.a()' on a null object reference
                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2314)
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388)
                                                   at android.app.ActivityThread.access$800(ActivityThread.java:148)
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292)
                                                   at android.os.Handler.dispatchMessage(Handler.java:102)
                                                   at android.os.Looper.loop(Looper.java:135)
                                                   at android.app.ActivityThread.main(ActivityThread.java:5312)
                                                   at java.lang.reflect.Method.invoke(Native Method)
                                                   at java.lang.reflect.Method.invoke(Method.java:372)
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901)
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696)
                                                Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.nexage.sourcekit.vast.a.e.a()' on a null object reference
                                                   at org.nexage.sourcekit.vast.activity.VASTActivity.onCreate(Unknown Source)
                                                   at android.app.Activity.performCreate(Activity.java:5953)
                                                   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1128)
                                                   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2267)
                                                   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2388) 
                                                   at android.app.ActivityThread.access$800(ActivityThread.java:148) 
                                                   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292) 
                                                   at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                   at android.os.Looper.loop(Looper.java:135) 
                                                   at android.app.ActivityThread.main(ActivityThread.java:5312) 
                                                   at java.lang.reflect.Method.invoke(Native Method) 
                                                   at java.lang.reflect.Method.invoke(Method.java:372) 
                                                   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:901) 
                                                   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:696) 

我正在使用这个开源项目https://github.com/nexage/sourcekit-vast-android作为我工作室项目中的一个模块。它在名为VAST的开源项目中崩溃了。我已经在我的studio项目中添加了VAST作为模块依赖项。我已经为我的工作室项目和庞大的模块启用了proguard。下面是我用于VAST模块的proguard.config文件：

-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontskipnonpubliclibraryclassmembers
-dontpreverify
-dontshrink
-verbose
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-keep class org.nexage.sourcekit.vast.VASTPlayer {*;}
-keep interface org.nexage.sourcekit.vast.VASTPlayerListener {*;}
-keep class org.nexage.sourcekit.vast.model.** {*;}
-keep class org.nexage.sourcekit.vast.processor.** {*;}
-keep class org.nexage.sourcekit.vast.activity.** {*;}
-keep class org.nexage.sourcekit.util.** {*;}

Answer 1

您的实现应该如下所示：

import com.my.packagename.AB;

public class MainActivity extends ActionBarActivity implements AB.TestInterface {

 // other stuff

@Override
public void Ready() {

}

@Override
public void Error(int error) {

}

@Override
public void Click() {

}

@Override
public void Complete() {

}

@Override
public void Dismiss() {

}

}

你需要导入父类，希望这能对你有所帮助。

Answer 2

尝试使用

-keepclassmembers class com.some.somemore.AB { *; }

希望能有所帮助