我有一个Android Studio 3.0 Canary的问题。 在所有项目中，我无法在预览工具中使用支持库中的任何视图。它显示渲染错误。在新项目中是同样的问题。支持库和ViewBackgroundHelper
Samople代码：
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
，并在预览看起来 screenshot
登录：
java.lang.NoSuchFieldError: ViewBackgroundHelper at android.support.v7.widget.AppCompatBackgroundHelper.loadFromAttributes(AppCompatBackgroundHelper.java:46) at android.support.v7.widget.AppCompatImageView.(AppCompatImageView.java:73) at android.support.v7.widget.AppCompatImageView.(AppCompatImageView.java:66) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:481) at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:264) at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:215) at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadClass(LayoutlibCallbackImpl.java:214) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:336) at android.view.BridgeInflater.onCreateView(BridgeInflater.java:155) at android.view.LayoutInflater.onCreateView(LayoutInflater.java:720) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:788) at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:225) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:863) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:837) at android.view.LayoutInflater.inflate(LayoutInflater.java:489) at com.android.layoutlib.bridge.bars.CustomBar.(CustomBar.java:90) at com.android.layoutlib.bridge.bars.NavigationBar.(NavigationBar.java:52) at com.android.layoutlib.bridge.bars.NavigationBar.(NavigationBar.java:46) at com.android.layoutlib.bridge.impl.Layout.createNavBar(Layout.java:325) at com.android.layoutlib.bridge.impl.Layout.(Layout.java:151) at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:288) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:382) at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:193) at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:591) at com.android.tools.idea.rendering.RenderTask.lambda$inflate$3(RenderTask.java:739) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)
gradle这个：
android {
compileSdkVersion 26
buildToolsVersion 25.0.3
defaultConfig {
minSdkVersion 21
targetSdkVersion 26
versionCode getAutoVersionCode()
versionName getAutoVersionName()
applicationId "***"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
multiDexEnabled true
printf("\n--------" + "VERSION DATA--------" + "\n" + "- PACKAGE: " + applicationId + "\n" + "- CODE: " + versionCode + "\n" +
"- NAME: " + versionName + "\n- APK: ${archivesBaseName}" + "\n----------------------------\n")
vectorDrawables.useSupportLibrary = true
}
useLibrary 'org.apache.http.legacy'
configurations.all {
resolutionStrategy.force 'com.google.code.findbugs:jsr305:1.3.9'
}
flavorDimensions "versionOfApp"
productFlavors {
dev {
applicationIdSuffix ".dev"
versionCode getAutoVersionCode()
versionName getAutoVersionName() + "[dev]"
dimension "versionOfApp"
}
prod {
versionCode getAutoVersionCode()
versionName getAutoVersionName()
dimension "versionOfApp"
}
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
testCompile 'junit:junit:4.12'
compile fileTree(include: ['*.jar'], dir: 'libs')
compile "com.android.support:appcompat-v7:26.0.0-beta1"
compile project(':core')
compile project(':data')
// various
annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
// widgets
compile 'com.mikepenz:materialdrawer:5.9.4'
compile "com.android.support:cardview-v7:26.0.0-beta1"
compile "com.android.support:customtabs:26.0.0-beta1"
//Multidex
compile 'com.android.support:multidex:1.0.1'
//Timber
compile 'com.jakewharton.timber:timber:4.5.1'
//pager bullet
compile 'com.robohorse.pagerbullet:pagerbullet:1.0.8'
//fb
compile 'com.facebook.stetho:stetho:1.5.0'
compile 'com.facebook.android:facebook-android-sdk:4.24.0'
//glide
compile 'com.github.bumptech.glide:glide:4.0.0-RC1'
annotationProcessor 'com.github.bumptech.glide:compiler:4.0.0-RC1'
//Photo
compile 'com.github.chrisbanes:PhotoView:2.1.2'
//joda
compile 'net.danlew:android.joda:2.9.5'
implementation 'com.google.firebase:firebase-messaging:11.0.2'
}
apply plugin: 'com.google.gms.google-services'
发布你的应用'build.gradle' –
我仍然遇到同样的问题26.0.0 stable，Android Studio 3 canary 8 –