下面是我的xml文件.在预览中有两个错误"无法加载具有未知错误的AppCompat ActionBar"和"无法实现多个类".怎么能运行app.But应用程序崩溃,在Logcat中没有显示错误.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="506dp" />
<LinearLayout
android:id="@+id/layout_main"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1"
tools:context=".Activity.MainActivity">
<LinearLayout
android:id="@+id/main_layout"
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="0.7"
tools:context=".Activity.MainActivity">
<!-- our tablayout to display tabs -->
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
app:tabMode="scrollable"
app:tabSelectedTextColor="@color/colorBlack"
app:tabTextColor="@color/colorWhite"
android:background="@color/colorOran"
android:minHeight="?attr/actionBarSize"
/>
<!-- View pager to swipe views -->
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</LinearLayout>
<LinearLayout
android:id="@+id/ll"
android:layout_width="match_parent"
android:layout_height="64dp"
android:layout_alignParentBottom="true"
android:background="#ffffff"
android:orientation="horizontal"
android:layout_weight="0.3"
android:weightSum="4"
tools:layout_editor_absoluteX="8dp" …Run Code Online (Sandbox Code Playgroud) 我刚刚在Test里面创建了项目Android Studio,我收到了以下消息:
摘要:
渲染问题:此版本的渲染库比您的Android Studio版本更新.请更新Android Studio.
细节:
org.jetbrains.android.uipreview.RenderingException: This version of the rendering library is more recent than your version of Android Studio. Please update Android Studio
at org.jetbrains.android.uipreview.LayoutLibraryLoader.load(LayoutLibraryLoader.java:90)
at org.jetbrains.android.sdk.AndroidTargetData.getLayoutLibrary(AndroidTargetData.java:159)
at com.android.tools.idea.rendering.RenderService.createTask(RenderService.java:164)
at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:475)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
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然而我的Android Studio IS是最新的,当我通过Help- > 检查它时Check for Update,我得到了Your already …
我刚开始学习Kotlin进行android开发,并开始了一个空项目并添加了一个活动.我已经在Kotlin文档中添加了所需的gradle依赖项.默认情况下,MainActivity的xml文件仅包含TextView.但是当我尝试在布局编辑器中预览xml时,它会显示"渲染错误"
Render problem
Failed to load AppCompat ActionBar with unknown error.
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我也得到了这个
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)
Exception Details java.lang.ClassNotFoundException: android.support.v4.view.TintableBackgroundView
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我尝试过重建项目并手动刷新布局.但似乎没有任何效果. …
从昨天起我就开始与Android工作室合作了.我的问题是当我进行布局时.我有下一个错误(观看屏幕截图以获取更多信息):
渲染问题:此版本的渲染库比您的Android Studio版本更新.请更新Android Studio
如果我检查更新,他说我已经有最新版本的Android工作室,所以我无法更新.

我还在SDK管理器中安装了一些东西,请参见下面的截图.
任何人都可以帮我解决这个问题吗?
谢谢.
我已经开始了一个新的android工作室项目,并且在打开主要活动时,设计视图显示了这个错误并且没有在模拟器上显示布局:
org.jetbrains.android.uipreview.RenderingException:无法加载LayoutLib:com/android/layoutlib/bridge/Bridge:org.jetbrains.android.uipreview.LayoutLibraryLoader.load中不支持的major.minor版本52.0(LayoutLibraryLoader.java:90 )位于com.intellij.android.designer的com.android.tools.idea.rendering.RenderService.createTask(RenderService.java:166)的org.jetbrains.android.sdk.AndroidTargetData.getLayoutLibrary(AndroidTargetData.java:180). design.Surface.AndroidDesignerEditorPanel $ 6.run(AndroidDesignerEditorPanel.java:475)at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue) .java:310)at com.intellij.util.ui.update.MergingUpdateQueue $ 2.run(MergingUpdateQueue.java:254)at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)at com .intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)位于com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)位于com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)com.intellij.util.Alarm $ Request $ 1.run(Alarm.java:351)at java.util.concurrent.Executors $ RunnableAdapter.call(Executors.java:439)at java.util.concurrent.FutureTask $ Sync.innerRun(FutureTask.java:303)at java.util.concurrent.FutureTask.run(FutureTask. java:138)at java.util.concurrent.ThreadPoolExecutor $ Worker.runTask(ThreadPoolExecutor.java:895)at java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:918)at java.lang.Thread.run (Thread.java:695)
这里有什么问题?谢谢.
我在Android Studio上有一个从头开始的项目.布局编辑器工作正常.添加Google Play服务库后,现在当我打开布局XML文件时,我在"设计"选项卡中收到以下错误:"渲染问题:无法加载平台渲染库"
在Text选项卡中,我的TextView组件的所有属性都有一个警告"Unknown attribute android:[...]",其中[...]是声明的属性.
有谁知道如何解决这个问题?
渲染问题无法加载LayoutLib:com.android.layoutlib.bridge.Bridge(详细信息)
org.jetbrains.android.uipreview.RenderingException: Failed to load the LayoutLib: com.android.layoutlib.bridge.Bridge
at org.jetbrains.android.uipreview.LayoutLibraryLoader.load(LayoutLibraryLoader.java:90)
at org.jetbrains.android.sdk.AndroidTargetData.getLayoutLibrary(AndroidTargetData.java:180)
at com.android.tools.idea.rendering.RenderService.createTask(RenderService.java:166)
at com.intellij.android.designer.designSurface.AndroidDesignerEditorPanel$6.run(AndroidDesignerEditorPanel.java:475)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:320)
at com.intellij.util.ui.update.MergingUpdateQueue.execute(MergingUpdateQueue.java:310)
at com.intellij.util.ui.update.MergingUpdateQueue$2.run(MergingUpdateQueue.java:254)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:269)
at com.intellij.util.ui.update.MergingUpdateQueue.flush(MergingUpdateQueue.java:227)
at com.intellij.util.ui.update.MergingUpdateQueue.run(MergingUpdateQueue.java:217)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:351)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
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我刚刚在android studio中创建了新项目.我是这个工具的新手.问题是,它没有向我显示我的设计,它给了我错误,
This version of the rendering library is more recent than your version of Android Studio. Please update Android Studio
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我研究它,通过阅读这个问题,我做了同样的Android Studio渲染库1
但是现在,我在MainActivity.java文件中遇到了java编译错误.


我需要导入任何库吗?
我是android studio的新手,我安装了新版本(版本1.5.1).出于某种原因,我不断收到错误消息(每次我使用应用程序主题)时都说有渲染问题:缺少样式.我在网上寻找解决方案,但大多数已经过时或者根本不工作.
谢谢你的帮助.
清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.easycodingplus.myapplication">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
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建立gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.2"
defaultConfig {
applicationId "com.easycodingplus.myapplication"
minSdkVersion 8
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.android.support:design:23.1.1'
}
Run Code Online (Sandbox Code Playgroud) 我试图在gradle和java中评论代码的junit部分.它运作正常.但这是解决这个问题的唯一方法吗?为什么评论junit它有效?为什么会出现这个问题?有更好的选择吗?
我看不到这个布局的预览,是唯一有这个问题的,可以构建,其他一切都好。拉图特
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".PriceActivity">
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fabAddCart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
android:clickable="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:srcCompat="@drawable/ic_baseline_add_shopping_cart_24" />
<LinearLayout
android:id="@+id/linearLayout2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:orientation="horizontal">
<EditText
android:id="@+id/editCode"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:autofillHints=""
android:ems="10"
android:hint="Code"
android:inputType="number|text" />
<ImageButton
android:id="@+id/imgbScan"
android:layout_width="50dp"
android:layout_height="50dp"
android:adjustViewBounds="true"
android:background="@drawable/btn_primary"
android:cropToPadding="true"
android:padding="8dp"
android:scaleType="fitCenter"
android:tint="#fff"
app:srcCompat="@drawable/ic_baseline_qr_code_scanner_24" />
</LinearLayout>
<ImageView
android:id="@+id/imageView2"
android:layout_width="200dp"
android:layout_height="200dp"
android:visibility="gone"
tools:srcCompat="@tools:sample/backgrounds/scenic" />
<TextView
android:id="@+id/txtPrice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#2E7D32"
android:textSize="24sp"
android:textStyle="bold" />
<TextView
android:id="@+id/txtName"
android:layout_width="wrap_content"
android:layout_height="wrap_content" …Run Code Online (Sandbox Code Playgroud)