震驚：新建android項目竟然報錯，Rejecting re-init on previously-failed...

錯誤提示

03-20 14:54:57.718 7909-7909/? I/zygote64: Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
03-20 14:54:57.719 7909-7909/? I/zygote64:     at void android.support.v4.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2341)
        at void android.support.v7.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:62)
        at java.lang.Object java.lang.reflect.Constructor.newInstance0(java.lang.Object[]) (Constructor.java:-2)
        at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[]) (Constructor.java:334)
        at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:651)
        at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:794)
        at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:734)
        at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:867)
        at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:828)
        at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:519)
        at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:427)
        at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:374)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:607)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.example.kingnewspring.kotlintest.MainActivity.onCreate(android.os.Bundle) (MainActivity.kt:24)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7098)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7089)
        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$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2770)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2895)
        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:1616)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:173)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6653)
        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$MethodAndArgsCaller.run() (RuntimeInit.java:547)
        at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:821)
    Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.example.kingnewspring.kotlintest-f-pJtef5aNEspOp1AQerjw==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.kingnewspring.kotlintest-f-pJtef5aNEspOp1AQerjw==/lib/arm64, /system/lib64, /system/vendor/lib64]]
        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 android.support.v4.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2341)
        at void android.support.v7.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:62)
        at java.lang.Object java.lang.reflect.Constructor.newInstance0(java.lang.Object[]) (Constructor.java:-2)
        at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[]) (Constructor.java:334)
        at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:651)
        at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:794)
        at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:734)
        at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:867)
        at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:828)
        at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:519)
        at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:427)
        at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:374)
        at android.view.ViewGroup android.support.v7.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:607)
        at void android.support.v7.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:518)
        at void android.support.v7.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:466)
        at void android.support.v7.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:140)
        at void com.example.kingnewspring.kotlintest.MainActivity.onCreate(android.os.Bundle) (MainActivity.kt:24)
        at void android.app.Activity.performCreate(android.os.Bundle, android.os.PersistableBundle) (Activity.java:7098)
        at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:7089)
        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$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2770)
        at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2895)
        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:1616)
        at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:106)
        at void android.os.Looper.loop() (Looper.java:173)
        at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6653)
        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:821)

錯誤場景

直接新建一個android項目，全部默認配置，運行后提示錯誤，但是錯誤并不會影響使用，也不會導致閃退，因此錯誤級別不是很高，甚至可以不處理，但是有點強迫癥的我還是決定把它解決掉

錯誤分析

直接看錯誤碼第一句

 Rejecting re-init on previously-failed class java.lang.Class<android.support.v4.view.ViewCompat$OnUnhandledKeyEventListenerWrapper>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;

提示類找不到錯誤：java.lang.NoClassDefFoundError，并且指明是這個類
android/view/View$OnUnhandledKeyEventListener，于是我們根據目錄找到這個接口：

android View類.png

圖中左上角看到一排提示，提示沒有api 28的資源! 我看了下，我android SDK的確沒有安裝api 28，但是我的編譯版本卻是api28，雖然這不是問題的根本原因（即使你安裝了安卓9.0即api28的sdk也是報錯），但是卻提醒了我，可能是運行時平臺的原因，而我debug的手機系統是api 27，要比編譯版本低！！：
app下的build.gradle文件.png

至此，知道問題的解決方案了

解決方案

  • 將依賴平臺改成模擬器或真機對應的平臺，我的手機是api27，注意依賴也需要改
    修改后.png

再次debug，控制臺沒有再次報錯了！秉著求證的精神，我全局搜索了下剛剛報錯找不到的接口，發現在api27平臺的確找不到

搜不到該類.png

看來該接口的確是api 28開始加上去的。

總結

編譯版本不能亂用，需謹慎。不是什么大問題，僅當給強迫癥的朋友，一個解決問題的思路。

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