不能使ConstraintLayout膨胀 [英] Can't inflate ConstraintLayout
问题描述
每次我的应用程序崩溃是因为它在类路径中找不到Landroidx/constraintlayout/widget/R $ styleable.我试图重建缓存并使之无效，但是在运行时它总是给我同样的错误.
我尝试了版本1.1.2和1.1.3.有趣的是:使用1.1.3时，androidX Jetifier会强制使用1.1.2，如从gradle报告中看到的那样
Each time my app crashes because it can't find Landroidx/constraintlayout/widget/R$styleable in classpath. I tried to rebuild, invalidate cache but it always gives me the same error in runtime.
I tried both versions 1.1.2 and 1.1.3. And interesting: when using 1.1.3 androidX Jetifier just forces using 1.1.2 as you can see from gradle report
Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:651)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.inflate(LayoutInflater.java:496)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:141)
at com.github.sharetaxi.LoginActivity.onCreate(LoginActivity.kt:24)
at android.app.Activity.performCreate(Activity.java:7050)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2809)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1620)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:6701)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:246)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/constraintlayout/widget/R$styleable;
at androidx.constraintlayout.widget.ConstraintLayout.init(ConstraintLayout.java:590)
at androidx.constraintlayout.widget.ConstraintLayout.<init>(ConstraintLayout.java:567)
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
at android.view.LayoutInflater.createView(LayoutInflater.java:651)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:794)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:734)
at android.view.LayoutInflater.inflate(LayoutInflater.java:496)
at android.view.LayoutInflater.inflate(LayoutInflater.java:427)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:141)
at com.github.sharetaxi.LoginActivity.onCreate(LoginActivity.kt:24)
at android.app.Activity.performCreate(Activity.java:7050)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2809)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2931)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1620)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:6701)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:246)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:783)
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.constraintlayout.widget.R$styleable" on path: DexPathList
我正在将 Android Studio 3.3 与新的android gradle插件一起使用.在我的gradle.properties中，启用了jetifier:
I'm using Android Studio 3.3 with fresh android gradle plugin. And In my gradle.properties I have enabled jetifier:
android.useAndroidX=true
android.enableJetifier=true
依存关系的解析如下:
> Task :app:dependencyInsight
androidx.constraintlayout:constraintlayout:1.1.2
variant "default" [
org.gradle.status = release (not requested)
Requested attributes not found in the selected variant:
com.android.build.api.attributes.BuildTypeAttr = debug
org.gradle.usage = java-api
com.android.build.gradle.internal.dependency.AndroidTypeAttr = Aar
org.jetbrains.kotlin.platform.type = androidJvm
]
Selection reasons:
- Was requested
- Selected by rule : ENABLE_JETIFIER is enabled
- By constraint : debugRuntimeClasspath uses version 1.1.2
com.android.support.constraint:constraint-layout:1.1.3 -> androidx.constraintlayout:constraintlayout:1.1.2
+--- debugCompileClasspath
\--- project :general
\--- debugCompileClasspath
(*) - dependencies omitted (listed previously)
A web-based, searchable dependency report is available by adding the --scan option.
在xml中，其外观如下:
In xml it looks like following:
<androidx.constraintlayout.widget.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"
android:background="@drawable/login_bg"
android:orientation="vertical">
...
</androidx.constraintlayout.widget.ConstraintLayout>
更新:
最后，由于没有其他解决方案，我不得不使用ConstraintLayout 2.0 alpha版本
推荐答案
确保将实现"androidx.constraintlayout:constraintlayout:2.0.0-alpha3"放入build.gradle(应用程序)的依赖项中:
Make sure you put implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha3' inside dependencies in build.gradle (app):
dependencies {
implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha3'
}
在gradle.properties内添加:
And inside gradle.properties add:
android.enableJetifier=true
android.useAndroidX=true
它在Android Studio 3.3中对我有效.
It works for me in Android Studio 3.3.
我刚刚注意到您不想使用Alpha版本.无论如何，我希望答案的其他部分都能有所帮助.
I've just noticed you don't want to use alpha version. Anyways, I hope the other parts of my answer can help.
这篇关于不能使ConstraintLayout膨胀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！
