从androidx的支持库中调用Api 28类

Question

尝试在Android手机上运行调试模式时遇到此错误。

合理的原因为什么找不到应用程序，OnUnhandledKeyEventListener因为它是在api 28中添加的，而我的手机运行的是api 27，但是为什么它应该尝试作为支持库呢？是库中的错误还是我遗漏了一些东西？即使您创建一个空的android studio项目并进行重构->迁移到AndroidX，也会发生这种情况

    I/zygote64: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/base.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_resources_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_5_apk.apk", zip file "/data/ap
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)
    Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/base.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_resources_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_5_apk.apk", zip file "/data/ap
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)
I/zygote64: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/base.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_dependencies_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_resources_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_0_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_1_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_2_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_3_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_4_apk.apk", zip file "/data/app/com.infradev.lessontimer-oANosPd_Q6S3fKsdUvgGLg==/split_lib_slice_5_apk.apk", zip file "/data/ap
        at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:125)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
        at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
        at void androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(android.view.View, androidx.core.view.OnApplyWindowInsetsListener) (ViewCompat.java:2422)
        at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:637)
        at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:141)
        at void com.infradev.lessontimer.LoginActivity.onCreate(android.os.Bundle) (LoginActivity.java:25)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7084)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7075)
        at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1215)
        at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2767)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2892)
        at void android.app.ActivityThread.-wrap11(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
        at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1613)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:171)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6635)
        at java.lang.Object java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (Method.java:-2)
        at void com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:823)

Answer 1

是库中的错误还是我遗漏了一些东西？

这是来自合子（）的信息消息I/zygote64。这不是错误。没有任何错误。

当类（ViewCompat）引用了无法识别的符号（View.OnUnhandledKeyEventListener）时，即使代码不会尝试使用这些符号，您也会收到此类消息。