android.support.v7.widget.RecyclerView：仅当通过appium打开应用程序时，空对象引用
[英]android.support.v7.widget.RecyclerView: null object reference only when app is opened via appium
问题描述
Are there any differences between running an app manually and using appium? 
手动运行应用程序与使用appium有什么区别？
Because 因为
It only happens when the app is started by appium. 仅当应用程序由appium启动时才会发生。 When app is installed and started manually, it runs normally without crashes. 手动安装和启动应用程序后，它可以正常运行而不会崩溃。
If I want to automatically or manually display the one specific page the app crash “Unfortunately,… has stopped” 如果我要自动或手动显示一个特定页面，则应用崩溃“不幸的是，…已停止”
There are not any errors about it in appium logs. 在appium日志中没有关于它的任何错误。 Only this exception in android monitor: android监视器中仅此异常：
E/AndroidRuntime: FATAL EXCEPTION: main Process: ..., PID: 26842
java.lang.NullPointerException: Attempt to read from field 'android.support.v7.widget.RecyclerView$Recycler android.support.v7.widget.RecyclerView.mRecycler' on a null object reference at android.support.v7.widget.RecyclerView$LayoutManager.onInitializeAccessibilityNodeInfo(RecyclerView.java:9580) at android.support.v7.widget.RecyclerViewAccessibilityDelegate.onInitializeAccessibilityNodeInfo(RecyclerViewAccessibilityDelegate.java:59) at android.support.v4.view.AccessibilityDelegateCompat$AccessibilityDelegateJellyBeanImpl$1.onInitializeAccessibilityNodeInfo(AccessibilityDelegateCompat.java:246) at android.support.v4.view.AccessibilityDelegateCompatJellyBean$1.onInitializeAccessibilityNodeInfo(AccessibilityDelegateCompatJellyBean.java:66) at android.view.View.onInitializeAccessibilityNodeInfo(View.java:6076) at android.view.View.createAccessibilityNodeInfoInternal(View.java:6037) at android.view.View$AccessibilityDelegate.createAccessibilityNodeInfo(View.java:22281) at android.view.Vie
I use appium v1.6.5 (1.7.1) and Android 6.0 - 7.1 emulators 我使用appium v1.6.5（1.7.1）和Android 6.0-7.1模拟器
1 个解决方案
解决方案1
0 2017-11-24 09:57:47
Appium is using adb shell to install/launch app and for elements interactions it use UiAutomator / UiAutomator2 (depends on AutomationName capability you provided) Appium使用adb shell安装/启动应用程序，并使用UiAutomator / UiAutomator2进行元素交互（取决于您提供的AutomationName功能）
You can see it in Appium server logs: 您可以在Appium服务器日志中看到它：
install apk: 安装apk：
Running '/Users/<user>/Library/Android/sdk/platform-tools/adb'
with args:["-P",5037,"-s","192.168.56.101:5555","shell","ls",
"/data/local/tmp/f0f1ea15bc776c996fddca878b00c589.apk"]
launch app: 启动应用程序：
Running '/Users/<user>/Library/Android/sdk/platform-tools/adb'
with args: ["-P",5037,"-s","192.168.56.101:5555","shell","am","start",
"-W","-n","<app_package>/<app_package>.launch.view.LaunchActivity","-S"]
waits for expected activity to be started: 等待预期的活动开始：
Getting focused package and activity
Running '/Users/dmitry/Library/Android/sdk/platform-tools/adb' with args:
["-P",5037,"-s","192.168.56.101:5555","shell","dumpsys","window","windows"]
Found package: <package> and fully qualified activity name : <activity_name>
finalize session creation: 完成会话创建：
New AndroidDriver session created successfully,
session 807d2f94-bf31-4107-87ca-848261a4ce15 added to master session list
So you can try the same commands from terminal and see if you can reproduce the crash 因此，您可以从终端尝试相同的命令 ，看看是否可以重现崩溃
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