当我尝试从Android Studio构建发布APK时，我收到以下Android Gradle插件警告：
library class android.content.res.XmlResourceParser extends or implements program class org.xmlpull.v1.XmlPullParser
library class android.content.Intent depends on program class org.xmlpull.v1.XmlPullParser
library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlSerializer
library class android.content.IntentFilter depends on program class org.xmlpull.v1.XmlPullParser
library class android.content.res.ColorStateList depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.AnimatedVectorDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.AnimationDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.BitmapDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.ClipDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.ColorDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.Drawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.DrawableWrapper depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.GradientDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.InsetDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.LayerDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.RippleDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.ScaleDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.ShapeDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.StateListDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.graphics.drawable.VectorDrawable depends on program class org.xmlpull.v1.XmlPullParser
library class android.util.Xml depends on program class org.xmlpull.v1.XmlPullParser
library class android.util.Xml depends on program class org.xmlpull.v1.XmlSerializer
library class android.util.Xml depends on program class org.xmlpull.v1.XmlPullParser
library class android.view.LayoutInflater depends on program class org.xmlpull.v1.XmlPullParser
there were 32 instances of library classes depending on program classes.
Exception while processing task java.io.IOException: Please correct the above warnings first.
这是构建错误：
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesAndResourcesWithProguardForRelease'.
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:103)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:73)
at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:59)
at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101)
at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44)
at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91)
at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:256)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:249)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:238)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:663)
at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:597)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.RuntimeException: Job failed, see logs for details
at com.android.build.gradle.internal.transforms.ProGuardTransform.transform(ProGuardTransform.java:207)
at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:239)
at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:235)
at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:102)
at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:230)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:50)
at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:124)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:113)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:95)
... 33 more
Caused by: java.io.IOException: Please correct the above warnings first.
at proguard.Initializer.execute(Initializer.java:485)
at proguard.ProGuard.initialize(ProGuard.java:271)
at proguard.ProGuard.execute(ProGuard.java:113)
at com.android.build.gradle.internal.transforms.BaseProguardAction.runProguard(BaseProguardAction.java:64)
at com.android.build.gradle.internal.transforms.ProGuardTransform.doMinification(ProGuardTransform.java:262)
at com.android.build.gradle.internal.transforms.ProGuardTransform.access$000(ProGuardTransform.java:65)
at com.android.build.gradle.internal.transforms.ProGuardTransform$1.run(ProGuardTransform.java:176)
at com.android.builder.tasks.Job.runTask(Job.java:47)
at com.android.build.gradle.tasks.SimpleWorkQueue$EmptyThreadContext.runTask(SimpleWorkQueue.java:41)
at com.android.builder.tasks.WorkQueue.run(WorkQueue.java:282)
... 1 more
由于这些错误，我无法创建发布APK。但我能够测试我的应用程序并成功创建调试APK。然后我尝试创建我的代码的OLD版本的发布APK，当时没有任何问题，但我仍然得到相同的错误。
这是我的build.gradle（app）文件：
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
defaultConfig {
applicationId "com.cg.lrceditor"
minSdkVersion 21
targetSdkVersion 28
versionCode 24
versionName "2.2.3"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
vectorDrawables.useSupportLibrary = true
}
buildTypes {
release {
shrinkResources true
minifyEnabled true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
debug {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.billingclient:billing:1.1'
testImplementation 'junit:junit:4.12'
implementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'org.testng:testng:6.9.6'
}
不知道为什么，但如果我将minifyEnabled和shrinkResources都设置为false，我就能成功创建发布APK。但随后应用程序大小将不会被优化。
我已经尝试在-dontwarn org.xmlpull.v1.**中使用-ignorewarnings或proguard-rules.pro忽略警告，我可以生成发布APK，但是当我启动应用程序时，它崩溃了。这是崩溃的相关堆栈跟踪：
2019-03-26 10:46:28.413 19982-19982/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.cg.lrceditor, PID: 19982
java.lang.NoSuchMethodError: No static method asAttributeSet(Lorg/a/a/a;)Landroid/util/AttributeSet; in class Landroid/util/Xml; or its super classes (declaration of 'android.util.Xml' appears in /system/framework/framework.jar:classes2.dex)
at android.support.v7.view.g.inflate(SupportMenuInflater.java:125)
at com.cg.lrceditor.HomePage.onCreateOptionsMenu(HomePage.java:294)
at android.app.Activity.onCreatePanelMenu(Activity.java:3315)
at android.support.v4.app.h.onCreatePanelMenu(FragmentActivity.java:364)
at android.support.v7.view.i.onCreatePanelMenu(WindowCallbackWrapper.java:93)
at android.support.v7.app.f$a.onCreatePanelMenu(AppCompatDelegateImplBase.java:332)
at android.support.v7.view.i.onCreatePanelMenu(WindowCallbackWrapper.java:93)
at android.support.v7.app.m$1.run(ToolbarActionBar.java:1454)
at android.os.Handler.handleCallback(Handler.java:754)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:163)
at android.app.ActivityThread.main(ActivityThread.java:6238)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
HomePage.java:294是getMenuInflater().inflate(R.menu.menu_home_page, menu);。
如何解决minifyEnabled和shrinkResources的这些问题？
库类android.content.res.XmlResourceParser扩展或实现程序类org.xmlpull.v1.XmlPullParser
库类android.content.Intent依赖于程序类org.xmlpull.v1.XmlPullParser
库类android.content.IntentFilter依赖于程序类org.xmlpull.v1.XmlSerializer
正如在第一个错误中提到的那样，包org.xmlpull.v1存在一些问题，所以只需从proguard中忽略它们。将此规则添加到您的proguard
-keep class org.xmlpull.v1.** { *; }
您不了解Proguard规则。请检查this链接以了解proguard规则。
默认情况下，您使用所有类文件的内容将被缩小。如果您使用的是任何库，则您有责任通过在proguard规则文件中提及这些类来保留这些类。
在proguard文件中尝试这一行
-dontwarn org.xmlpull.v1.**