android/view/view$onUnhandledKeyEventListener(onMeasure 错误) [英] android/view/view$onUnhandledKeyEventListener (onMeasure error)

问题描述

我在 Android Studio 3.1.3 中创建新项目时遇到问题，每当我创建一个项目时，设计布局都会抛出错误消息:

<块引用>

无法加载 AppCompat ActionBar，出现未知错误.

错误截图:

警告截图:

style.xml (while error)-->

<!-- 基本应用程序主题.--><style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar"><!-- 在此处自定义您的主题.--><item name="colorPrimary">@color/colorPrimary</item><项目名称="colorPrimaryDark">@color/colorPrimaryDark</item><item name="colorAccent">@color/colorAccent</item></风格>

我通过添加解决了:

<块引用>

style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"

如

问题是该应用程序没有操作栏，即使 style.xml 具有适当的代码，并且即使更改 Layout_width、Layout_height 并将其约束为约束布局也不会显示工具栏.

解决方案

我找到了答案，但我不确定这是最好的答案.但这解决了所有问题.

该错误可能是由于 API 28.0.0-alpha3 中的一个错误导致的，该错误可能会影响向后兼容性(我还不确定).

build.gradle(Module: app)(修复前)-->

build.gradle(模块:app)

<块引用>

compileSdkVersion 28

目标 SDK 版本 28

实现'com.android.support:appcompat-v7:28.0.0-alpha3'

我通过将 API 版本降低到 27.1.1 并更改 compileSdkVersion、targetSdkVersion 和实现来修复错误.

build.gradle(Module: app)(修复错误后) -->

build.gradle(模块:app)

要修复错误只需更改

<块引用>

compileSdkVersion 27

目标 SDK 版本 27

实现'com.android.support:appcompat-v7:27.1.1'

并重新构建 Gradle.这将清除有关 ActionBar 和工具栏的所有错误和警告.

没有错误和工作工具栏

I had a problem in creating a new project in Android studio 3.1.3, whenever I created a project the design layout will throw an error message:

Failed to load AppCompat ActionBar with unknown error.

error screenshot:

warning screenshot:

style.xml (while error)-->

<resources>

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

And I solved with by adding:

style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar"

As showed in a other post

But when I needed to add a toolbar I stuck with the error:

android/view/view$onUnhandledKeyEventListener

error screenshot:

The problem is the app doesn't have actionbar, even though the style.xml have the appropriate code and toolbar never shows up even by changing the Layout_width, Layout_height and by constrainting it to the constraint layout.

解决方案

I found the answer, but I'm not sure this is the best answer. But this fix all the issue.

The error could be because of a bug in the API 28.0.0-alpha3 which may mess around with the backward compatibility (I'm not completely sure about it yet).

build.gradle(Module: app) (before fix)-->

build.gradle(Module: app)

compileSdkVersion 28

targetSdkVersion 28

implementation 'com.android.support:appcompat-v7:28.0.0-alpha3'

I fixed the error by reducing the API version to 27.1.1 and changing the compileSdkVersion, targetSdkVersion and implementation.

build.gradle(Module: app)(after fixing error) -->

build.gradle(Module: app)

To fix the error just change

compileSdkVersion 27

targetSdkVersion 27

implementation 'com.android.support:appcompat-v7:27.1.1'

And Re-build the Gradle. This will clear all the error and warning about the ActionBar and toolbar.

no error and working toolbar

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