我在将 android studio 升级到 2.2.3 后遇到问题 问题是使用 android.support.design.widget.CoordinatorLayout 它显示这个错误

The following classes could not be found: - android.support.design.widget.CoordinatorLayout (Fix Build Path, Edit XML, Create Class) - android.support.design.widget.TextInputLayout (Fix Build Path, Edit XML, Create Class) Tip: Try to build the project. Tip: Try to refresh the layout. \app\src\main\res\layout\activity_main.xml" in attribute "imeActionId" is not a valid integer

我试图修复构建路径，但对我不起作用。 当我构建并运行它时显示

Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.design.widget.CoordinatorLayout" on path: DexPathList[[zip file "/data/app/fitness.aclass.fitness-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56) at java.lang.ClassLoader.loadClass(ClassLoader.java:511) at java.lang.ClassLoader.loadClass(ClassLoader.java:469) at android.view.LayoutInflater.createView(LayoutInflater.java:571) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:743) at android.view.LayoutInflater.inflate(LayoutInflater.java:482)  at android.view.LayoutInflater.inflate(LayoutInflater.java:414)  at android.view.LayoutInflater.inflate(LayoutInflater.java:365)  at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:284)  at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)  at fitness.aclass.fitness.MainActivity.onCreate(MainActivity.java:11)  at android.app.Activity.performCreate(Activity.java:6092)  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2595)  at android.app.ActivityThread.access$800(ActivityThread.java:178)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1470)  at android.os.Handler.dispatchMessage(Handler.java:111)  at android.os.Looper.loop(Looper.java:194)  at android.app.ActivityThread.main(ActivityThread.java:5624)  at java.lang.reflect.Method.invoke(Native Method)  at java.lang.reflect.Method.invoke(Method.java:372)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)  Suppressed: java.lang.ClassNotFoundException: android.support.design.widget.CoordinatorLayout at java.lang.Class.classForName(Native Method) at java.lang.BootClassLoader.findClass(ClassLoader.java:781) at java.lang.BootClassLoader.loadClass(ClassLoader.java:841) at java.lang.ClassLoader.loadClass(ClassLoader.java:504) ... 22 more Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available

这是我的build.gradle(应用模块)

   apply plugin: 'com.android.application'

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.2"
    defaultConfig {
        applicationId "fitness.aclass.fitness"
        minSdkVersion 16
        targetSdkVersion 24
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support:appcompat-v7:24.2.0'

    testCompile 'junit:junit:4.12'
}

任何解决方案。!

最佳答案

CoordinatorLayout 是设计库的一部分。所以你应该添加

实现'com.android.support:design:28.0.0'

或 24.2.0 版本，如果您出于某种原因需要使用过时的版本。

关于java - android.support.design.widget.CoordinatorLayout 的渲染问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42443083/