Question

我在这里看到了很多像这样的问题，他们都有相同的答案，确保你有

编译'com.android.support:cardview-v7:26.0.0'

在build.gradle文件中，并确保在xml中使用完全限定名称...

<android.support.v7.widget.CardView

我在我的xml文件中使用它，并且我的build.gradle文件中有编译行。应用程序编译，但每当我在模拟器上运行应用程序时，我单击按钮启动ShowImagesActivity，它会在路径上找到“未找到类'android.support.v7.widget.CardView'消息崩溃... “

这是我的layout_images.xml文件......

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="match_parent"
              android:layout_height="match_parent">

    <adroid.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="8dp"
        android:padding="8dp">
        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:minHeight="100dp">
            <TextView
                android:id="@+id/textViewName"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="Name"
                android:textAlignment="center" />
            <ImageView
                android:id="@+id/imageView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_below="@id/textViewName" />
        </RelativeLayout>
    </adroid.support.v7.widget.CardView>

</LinearLayout>

这是我的build.gradle文件，应用程序一个......

apply plugin: 'com.android.application'
check.dependsOn 'assembleMinSdkJellybeanDebugAndroidTest', 'assembleMinSdkIcsDebugAndroidTest'

android {
    compileSdkVersion 26
    buildToolsVersion '26.0.0'
    flavorDimensions "minSdkVersion"

    defaultConfig {
        applicationId "com.google.firebase.quickstart.auth"
        minSdkVersion 26
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
    }

    buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    lintOptions {
        abortOnError false
    }

    productFlavors {
        // Build variant with minSdk 16 to include Facebook and FirebaseUI libraries.
        minSdkJellybean {
            dimension "minSdkVersion"
            minSdkVersion 16
        }
        // Build variant with minSdk 14, excludes Facebook and FirebaseUI libraries.
        minSdkIcs {
            dimension "minSdkVersion"
            minSdkVersion 16
        }
    }
}

configurations.all {
    resolutionStrategy.force 'com.android.support:support-annotations:26.0.0'
}

dependencies {
    // Firebase Authentication
    // Google Sign In SDK (only required for Google Sign In)
    // Firebase UI
    // Used in FirebaseUIActivity. The FirebaseUI-Android library has a minSdk level of 16
    // so this library is only included in the minSdkJellybean variant.
    // Facebook Android SDK (only required for Facebook Login)
    // Used in FacebookLoginActivity. This is only compiled into the minSdkJellybean variant of this
    // app. You can build a 'minSdkGingerbread' variant to test on devices with 9 <= SDK <= 15.
    // Twitter Android SDK (only required for Twitter Login)
    compile('com.twitter.sdk.android:twitter-core:1.6.6@aar') {
        transitive = true
    }
    compile('com.twitter.sdk.android:twitter:1.13.1@aar') {
        transitive = true
    }
    compile 'com.google.firebase:firebase-storage:11.2.0'
    compile 'com.google.firebase:firebase-storage:11.2.0'
    compile 'com.android.support:appcompat-v7:26.0.0'
    compile 'com.android.support:animated-vector-drawable:26.0.0'
    compile 'com.android.support:cardview-v7:26.0.0'
    compile 'com.android.support:recyclerview-v7:26.0.0'
    compile 'com.android.support:design:26.0.0'
    compile 'com.firebaseui:firebase-ui:2.3.0'
    compile 'com.google.firebase:firebase-auth:11.2.0'
    compile 'com.google.android.gms:play-services-auth:11.2.0'
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    compile 'com.google.firebase:firebase-database:11.2.0'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
    androidTestCompile 'com.android.support.test:runner:0.5'
    minSdkJellybeanCompile 'com.facebook.android:facebook-android-sdk:4.9.0'
    minSdkJellybeanCompile 'com.android.support:customtabs:26.0.0'
}

apply plugin: 'com.google.gms.google-services'

在我的代码中我正在使用

@Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View                    v          = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_images, parent, false);
        ViewHolder viewHolder = new ViewHolder(v);
        return viewHolder;
    }

我拥有所有其他帖子我需要的所有内容，build.gradle中的编译行以及xml视图中的完全限定名称，应用程序编译完美，只要我尝试运行它就会崩溃单击启动ShowImagesActivity的按钮后的模拟器。如果它找不到类，它不应该编译失败吗？有没有其他解决方案，或者任何人都可以看到任何错误导致应用程序崩溃而无法找到该类？谢谢。

Answer 1

检查您的输入，您错过了一个＆＃39; n＆＃39;在XML

中

<adroid.support.v7.widget.CardView ...

Answer 2

我遇到了同样的问题，但是我的库已更新为androidX

implementation 'androidx.cardview:cardview:1.0.0'

因此，我的问题通过使用标记解决了

<androidx.cardview.widget.CardView/>

Answer 3

我试试xml

点击{更改为android.support.v7.widget.CardView}

没有发生崩溃

没有找到类“adroid.support.v7.widget.CardView”

3 个答案: