无法解决 Symbol Theme、Themeoverlay 和小部件 Appcompat答案

【问题标题】：Cannot Resolve Symbol Theme, Themeoverlay, and widget Appcompat无法解决 Symbol Theme、Themeoverlay 和小部件 Appcompat
【发布时间】：2018-04-12 01:21:24
【问题描述】：

之前一切都很好，但现在当我重新打开我的 Android 项目时，在样式中的 values 文件夹中，大部分父项都以红色突出显示。我不明白为什么以及如何解决它。当我编译项目时它工作正常，但我只想删除错误。以下是错误文件

这是图片文件：

我的应用构建文件是

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    useLibrary 'org.apache.http.legacy'
    buildToolsVersion "26.0.0"
    defaultConfig {
        applicationId "com.nepalpolice.cdp"
        minSdkVersion 15
        multiDexEnabled true
        targetSdkVersion 26
        versionCode 15
        versionName "15.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        lintOptions {
            checkReleaseBuilds false
            abortOnError false
        }

        packagingOptions {
            exclude 'META-INF/DEPENDENCIES'
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/LICENSE.txt'
            exclude 'META-INF/license.txt'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/project.properties'
            exclude 'META-INF/NOTICE.txt'
            exclude 'META-INF/notice.txt'
            exclude 'META-INF/ASL2.0'
            exclude 'allclasses-frame.html'
        }

    }
    dexOptions {
        jumboMode true
    }

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





dependencies {
    implementation 'com.google.firebase:firebase-auth:11.4.2'
    implementation 'com.google.firebase:firebase-storage:11.4.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation("com.github.bumptech.glide:glide:4.6.1") {
        exclude group: "com.android.support"
    }
    compile 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
    implementation 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:design:26.+'
    implementation 'com.android.support:support-v4:26.+'
    implementation 'com.android.support:cardview-v7:26.+'
    implementation 'com.android.support:recyclerview-v7:26.+'
    implementation 'com.google.firebase:firebase-messaging:11.4.2'
    compile 'com.google.firebase:firebase-database:11.4.2'
    compile 'com.google.firebase:firebase-core:11.4.2'
    implementation 'com.google.gms:google-services:3.1.0'
    implementation 'com.android.support:design:26.+'
    implementation 'de.hdodenhof:circleimageview:2.2.0'
    compile 'com.android.support:multidex:1.0.1'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
    implementation 'com.android.support:gridlayout-v7:26.+'
    implementation 'com.github.clans:fab:1.6.2'
    testCompile 'junit:junit:4.12'
    implementation 'com.google.android.gms:play-services-maps:11.4.2'
    implementation 'com.google.firebase:firebase-firestore:11.4.2'
    implementation 'id.zelory:compressor:2.1.0'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.12'
    implementation files('libs/libGoogleAnalyticsServices.jar')

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

而我的构建 gradle 文件是

apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    useLibrary 'org.apache.http.legacy'
    buildToolsVersion "26.0.0"
    defaultConfig {
        applicationId "com.nepalpolice.cdp"
        minSdkVersion 15
        multiDexEnabled true
        targetSdkVersion 26
        versionCode 15
        versionName "15.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        lintOptions {
            checkReleaseBuilds false
            abortOnError false
        }

        packagingOptions {
            exclude 'META-INF/DEPENDENCIES'
            exclude 'META-INF/LICENSE'
            exclude 'META-INF/LICENSE.txt'
            exclude 'META-INF/license.txt'
            exclude 'META-INF/NOTICE'
            exclude 'META-INF/project.properties'
            exclude 'META-INF/NOTICE.txt'
            exclude 'META-INF/notice.txt'
            exclude 'META-INF/ASL2.0'
            exclude 'allclasses-frame.html'
        }

    }
    dexOptions {
        jumboMode true
    }

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





dependencies {
    implementation 'com.google.firebase:firebase-auth:11.4.2'
    implementation 'com.google.firebase:firebase-storage:11.4.2'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation("com.github.bumptech.glide:glide:4.6.1") {
        exclude group: "com.android.support"
    }
    compile 'com.github.bumptech.glide:glide:4.6.1'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.6.1'
    implementation 'com.android.support:appcompat-v7:26.+'
    compile 'com.android.support:design:26.+'
    implementation 'com.android.support:support-v4:26.+'
    implementation 'com.android.support:cardview-v7:26.+'
    implementation 'com.android.support:recyclerview-v7:26.+'
    implementation 'com.google.firebase:firebase-messaging:11.4.2'
    compile 'com.google.firebase:firebase-database:11.4.2'
    compile 'com.google.firebase:firebase-core:11.4.2'
    implementation 'com.google.gms:google-services:3.1.0'
    implementation 'com.android.support:design:26.+'
    implementation 'de.hdodenhof:circleimageview:2.2.0'
    compile 'com.android.support:multidex:1.0.1'
    implementation 'com.theartofdev.edmodo:android-image-cropper:2.5.1'
    implementation 'com.android.support:gridlayout-v7:26.+'
    implementation 'com.github.clans:fab:1.6.2'
    testCompile 'junit:junit:4.12'
    implementation 'com.google.android.gms:play-services-maps:11.4.2'
    implementation 'com.google.firebase:firebase-firestore:11.4.2'
    implementation 'id.zelory:compressor:2.1.0'
    compile 'pl.droidsonroids.gif:android-gif-drawable:1.2.12'
    implementation files('libs/libGoogleAnalyticsServices.jar')

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

我尝试清理并运行项目，但问题仍未解决。

【问题讨论】：

是的，关于它说 3.1 的部分
@MikeM。这似乎解决了问题，但只有当我将 compiledSDKversion 替换为 27 而不是 26 时。但我仍然有 targetSDK 版本为 26。我是否也应该将其更改为 27？会不会有什么问题？
一般情况下是'com.android.support:support-v4:26.+' 指定版本的原因？（大多数人不建议使用'+'）'com.android.support:support-v4:26.1.0' 还有'com.android.support:design-v4:26.1.0'

标签： java android android-gradle-plugin

【解决方案1】：

我遇到了同样的问题。也许this 的帖子也有相同的根源。
无论如何，只有两个步骤帮助了我：

1.从“文件”菜单中关闭项目。
2.再次将项目作为现有的Android Studio项目打开。

【讨论】：