无法加载AppCompat ActionBar [英] Failed to load AppCompat ActionBar

问题描述

我在android studio中渲染某些代码时遇到问题，我能够运行该应用程序，但在预览中却遇到了以下错误:

I'm having problems rendering some code in android studio, I'm able to run the app but in the preview i got these errors:

无法加载具有未知错误的AppCompat ActionBar.

Failed to load AppCompat ActionBar with unknown error.

The following classes could not be instantiated:
- android.support.v7.widget.AppCompatImageView (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarContainer (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.Toolbar (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.AppCompatTextView (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarContextView (Open Class, Show Exception, Clear Cache)
- android.support.v7.app.WindowDecorActionBar (Open Class, Show Exception, Clear Cache)
- android.support.v7.widget.ActionBarOverlayLayout (Open Class, Show Exception, Clear Cache)

这是我的布局:

 <RelativeLayout
 xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     android:paddingBottom="@dimen/activity_vertical_margin"
     tools:context=".MainActivity">

     <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
         android:layout_height="wrap_content" />

 </RelativeLayout>

这是我的困境:

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion '26.0.2'

    defaultConfig {
        applicationId "com.sourcey.materialloginexample"
        minSdkVersion 15
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        android.defaultConfig.javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:25.0.1'
    compile 'com.android.support:design:25.0.1'
    compile 'com.jakewharton:butterknife:7.0.1'
}

知道我有什么兼容性问题吗?

Any idea what compatibility problem do i have?

推荐答案

您应更改compileSdkVersion和targetSdkVersion. 您的问题已得到解决，有关更多详细信息，请单击此处 https://stackoverflow.com/a/47067754/3797722

You should change compileSdkVersion and targetSdkVersion. Your problem has already answer, for more details you can check here https://stackoverflow.com/a/47067754/3797722

这篇关于无法加载AppCompat ActionBar的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！