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，设计布局都会引发错误消息:

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:

无法加载具有未知错误的AppCompat ActionBar.

Failed to load AppCompat ActionBar with unknown error.

错误屏幕截图:

error screenshot:

警告屏幕截图:

warning screenshot:

style.xml(出现错误时)->

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>

我通过添加以下内容来解决:

And I solved with by adding:

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

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

其他帖子

但是当我需要添加工具栏时，我坚持了以下错误:

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

android/view/view $ onUnhandledKeyEventListener

android/view/view$onUnhandledKeyEventListener

错误屏幕截图:

error screenshot:

问题在于，即使style.xml具有适当的代码，应用程序也没有动作栏，并且即使更改Layout_width，Layout_height并将其约束为约束布局，工具栏也不会显示.

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.

推荐答案

我找到了答案，但是我不确定这是最佳答案.但这解决了所有问题.

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

该错误可能是由于API 28.0.0-alpha3中的一个错误造成的，该错误可能会与向后兼容性混为一谈(我尚不确定).

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(模块:应用)(修复之前)->

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

build.gradle(模块:应用)

compileSdkVersion 28

compileSdkVersion 28

targetSdkVersion 28

targetSdkVersion 28

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

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

我通过将API版本降低到27.1.1并更改了compileSdkVersion，targetSdkVersion和实现来修复该错误.

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

build.gradle(模块:应用)(修复错误后)->

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

build.gradle(模块:应用)

要纠正错误，只需更改

compileSdkVersion 27

compileSdkVersion 27

targetSdkVersion 27

targetSdkVersion 27

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

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

然后重新构建Gradle.这将清除所有有关ActionBar和工具栏的错误和警告.

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

没有错误并且工具栏正常工作

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