我在遇到此错误时正在研究Android Studio应用程序。
Process: com.example.visualizercopy, PID: 28098
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.visualizercopy/io.esense.MainActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2751)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2812)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1528)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6317)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class android.support.constraint.ConstraintLayout
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.constraint.ConstraintLayout" on path: DexPathList[[zip file "/data/app/com.example.visualizercopy-1/base.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.visualizercopy-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.visualizercopy-1/lib/arm64, /system/lib64, /vendor/lib64]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
at android.view.LayoutInflater.createView(LayoutInflater.java:609)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.inflate(LayoutInflater.java:495)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:424)
at android.app.Activity.setContentView(Activity.java:2471)
at io.esense.MainActivity.onCreate(MainActivity.java:41)
at android.app.Activity.performCreate(Activity.java:6757)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2704)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2812)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1528)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6317)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:872)
2019-06-23 16:25:42.234 28098-28098/? E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:762)
这是我的gradle：
apply plugin: 'com.android.application'
android {
compileSdkVersion 29
defaultConfig {
applicationId "com.example.visualizercopy"
minSdkVersion 23
targetSdkVersion 29
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'androidx.appcompat:appcompat:1.1.0-beta01'
implementation 'com.jjoe64:graphview:4.2.2'
implementation 'com.android.support.constraint:constraint-layout:2.0.0-beta1'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}
这是我XML文件中的约束布局标签
<android.support.constraint.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:id="@+id/PLAY_PARENT"
android:padding="0dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
tools:layout_editor_absoluteY="81dp">
我已经在此站点和Google上研究了我的错误，而常见的答案是添加compile 'com.android.support.constraint:constraint-layout:1.0.2'，但是现在已过时编译，当我用实现替换编译并将其更改为最新版本('com.android.support.constraint:constraint-layout:2.0.0-beta1'(时，我仍然运行陷入相同的错误。我怎样才能解决这个问题？
我弄清楚了，我必须将 android.support.constraint.ConstraintLayout标记更新为我的布局xml中的 androidx.constraintlayout.widget.ConstraintLayout。
您正在使用Androidx软件包。因此，您必须使用Androidx迁移所有Android库。
因此，在gradle中替换了下面的线，
implementation 'com.android.support.constraint:constraint-layout:2.0.0-beta1'
这样，
implementation 'androidx.constraintlayout:constraintlayout:1.1.2'
参考此处。
如果您使用的是androidX软件包或要将它们用于项目，则必须将项目迁移到androidX。为此，您需要遵循以下步骤：
1(在Android Studio中，只需goto Refactor-> Migrate to AndroidX 迁移您的项目，如果某些问题迁移了项目，则可以备份项目。
之后，您的dependendencies将自动具有androidX包。
进一步阅读：这里