NoClassDefFoundError：android.support.v7.internal.view.menu.MenuBuilder [英] NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder

问题描述

Android运行Android 4.2的Samsung设备上的Android appcompat v7库存在问题。我在开发者控制台中继续使用以下堆栈跟踪崩溃：

  java.lang.NoClassDefFoundError：android.support.v7。 internal.view.menu.MenuBuilder 
 at android.support.v7.widget.PopupMenu。< init>（PopupMenu.java:66）
 at com。[my-package-name] .CustomActivity $ 5 .onClick（CustomActivity.java:215）
在android.view.View.performClick（View.java:4222）
在android.view.View $ PerformClick.run（View.java:17620）
在android.os.Handler.handleCallback（Handler.java:800）
在android.os.Handler.dispatchMessage（Handler.java:100）
在android.os.Looper.loop（ Looper.java:194）
在android.app.ActivityThread.main（ActivityThread.java:5391）
在java.lang.reflect.Method.invokeNative（本机方法）
在java。 lang.reflect.Method.invoke（Method.java:525）
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:833）
在com.android.internal。 os.ZygoteInit.main（的Zygo teInit.java:600）
 at dalvik.system.NativeStart.main（Native Method）
  

这是CustomActivity.java的第215行：

  PopupMenu popup = new PopupMenu（CustomActivity.this，mImageViewMenu）; 
  

崩溃来自一系列设备，但总是三星，总是Android 4.2。 >

一个快速的网页搜索让我相信很多人都有同样的问题，我试图解决这个问题的一些步骤是：

• 检查Android项目属性，确保appcompat库已正确添加。


• 检查Java Build Path Order和Export项目属性，确保选择Android依赖关系和Android私有库。


• 确认该类包含在库中（android.support.v7.internal.view.menu.MenuBuilder）。


• 确认R.java位于android.support.v7.appcompat的gen目录。


• 确认AppCompat主题包含在Manifest.xml活动中。 / li>
  
• 清理并重建项目。

尽管有这些步骤，尽管它在所有其他设备上工作和Android版本的崩溃报告仍然会遇到。

解决方案

编辑：

对于我来说（使用Proguard）来替换这个：

  -keep class android.support.v4。 } 
 -keep interface android.support.v4。** {*; } 
 
 -keep class android.support.v7。** {*; } 
 -keep interface android.support.v7。** {*; 
  

与此相关：

 ＃允许模糊android.support.v7.internal.view.menu ** 
＃以避免三星4.2.2设备与appcompat v21的问题
＃参见https： //code.google.com/p/android/issues/detail?id=78377 
 -keep class！android.support.v7.internal.view.menu。**，android.support。** {* ;} 
  

信用转到 google group，＃138 。

旧答案（临时解决方法）：
发生在我在ActionBar中使用微调框的项目中。我的解决方案是检查这些条件并更改应用程序流程：

  public static boolean isSamsung_4_2_2（）{
 String deviceMan = Build.MANUFACTURER; 
 String deviceRel = Build.VERSION.RELEASE; 
 returnsamsung.equalsIgnoreCase（deviceMan）&& deviceRel.startsWith（ 4.2.2）; 
} 
  

然后在活动的onCreate方法中：

  if（isSamsung_4_2_2（））{
 setContentView（R.layout.activity_main_no_toolbar）; 
} else {
 setContentView（R.layout.activity_main）; 
} 
  

正如所指出的，这不是一个确定的解决方案，它只是一种方法允许用户访问有限的功能，同时找到更永久的解决方案。

There is an issue with the Android appcompat v7 library on Samsung devices running Android 4.2. I keep getting crashes with the following stack trace in my Developer Console:

java.lang.NoClassDefFoundError: android.support.v7.internal.view.menu.MenuBuilder
    at android.support.v7.widget.PopupMenu.<init>(PopupMenu.java:66)
    at com.[my-package-name].CustomActivity$5.onClick(CustomActivity.java:215)
    at android.view.View.performClick(View.java:4222)
    at android.view.View$PerformClick.run(View.java:17620)
    at android.os.Handler.handleCallback(Handler.java:800)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:194)
    at android.app.ActivityThread.main(ActivityThread.java:5391)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:525)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
    at dalvik.system.NativeStart.main(Native Method)

This is line 215 of CustomActivity.java:

PopupMenu popup = new PopupMenu(CustomActivity.this, mImageViewMenu);

The crashes come from an array of devices, but always Samsung, and always Android 4.2.

A quick web search leads me to believe that many people have the same issue, some of the steps I have tried to solve the issue are:

• Check the Android project properties, make sure the appcompat library is added properly.
• Check the Java Build Path Order and Export project properties, make sure Android Dependencies and Android Private Libraries is checked.
• Confirm the class is included in the library (android.support.v7.internal.view.menu.MenuBuilder).
• Confirm R.java is located in gen directory for android.support.v7.appcompat.
• Confirm the AppCompat theme is included in the Manifest.xml activity.
• Clean and rebuild project.

Despite these steps, and despite it working on all other devices and Android versions the crash reports still come through.

解决方案

EDIT:

The solution that worked for me was (Using Proguard) to replace this:

-keep class android.support.v4.** { *; } 
-keep interface android.support.v4.** { *; }

-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }

with this:

# Allow obfuscation of android.support.v7.internal.view.menu.**
# to avoid problem on Samsung 4.2.2 devices with appcompat v21
# see https://code.google.com/p/android/issues/detail?id=78377
-keep class !android.support.v7.internal.view.menu.**,android.support.** {*;}

Credit goes to the google group, #138.

Old answer (Temporary Workaround): It happens in a project where I use an spinner in the ActionBar. My solution was to check for those conditions and change the app flow:

public static boolean isSamsung_4_2_2() {
    String deviceMan = Build.MANUFACTURER;
    String deviceRel = Build.VERSION.RELEASE;
    return "samsung".equalsIgnoreCase(deviceMan) && deviceRel.startsWith("4.2.2");
}

Then in the activity's onCreate method:

if (isSamsung_4_2_2()) {
    setContentView(R.layout.activity_main_no_toolbar);
} else {
    setContentView(R.layout.activity_main);
}

As pointed out this is not a definitive solution, it is just a way to allow users to have access to limited functionality while a more permanent solution is found.

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