Gradle构建失败并出现错误：链接资源和AAPT2错误失败

Question

每次我尝试运行项目或尝试重建它时，都会抛出错误：链接资源失败。请参见屏幕截图：

所有的drawable仍然显示这一点。 并且我的java文件的所有R都是红色的，当悬停时它显示一条消息无法解析符号＆＃39; R＆＃39; 请参见屏幕截图：

我打开的每个java文件都会出现错误。

我尝试了无效缓存和清理项目但没有任何工作。到处搜索，但没有找到解决方案。

提前致谢！

编辑：build.gradle（模块：app）

    // Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {

    repositories {
        google()
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'


        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

的build.gradle（项目：weMate）

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.shivamtiwari.wemate"
        minSdkVersion 17
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support:design:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
    implementation 'com.android.support:support-v4:26.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}

尝试gradlew assembleDebug后：

        Microsoft Windows [Version 10.0.16299.371]
(c) 2017 Microsoft Corporation. All rights reserved.

E:\MCA\AndroidProject\weMate>gradlew assembleDebug
E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_account.xml:27: AAPT: error: resource drawable/uploaddisplay (aka com.shivamtiwari.wemate:drawable/uploaddisplay) not fo
und.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool.xml:9: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not fo
und.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool.xml:21: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not f
ound.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool.xml:33: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not f
ound.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool.xml:51: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not f
ound.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool.xml:64: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not f
ound.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_car_pool_list.xml:8: AAPT: error: resource drawable/list_row_selector (aka com.shivamtiwari.wemate:drawable/list_row_sel
ector) not found.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_helpdesk.xml:8: AAPT: error: resource drawable/search_bar_bg (aka com.shivamtiwari.wemate:drawable/search_bar_bg) not fo
und.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\fragment_shop_list.xml:8: AAPT: error: resource drawable/list_row_selector (aka com.shivamtiwari.wemate:drawable/list_row_selecto
r) not found.

E:\MCA\AndroidProject\weMate\app\src\main\res\layout\nav_header_main.xml:2: AAPT: error: resource drawable/side_nav_bar (aka com.shivamtiwari.wemate:drawable/side_nav_bar) not found.

error: failed linking file resources.

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:processDebugResources'.
> Failed to process resources, see aapt output above for details.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 4s
13 actionable tasks: 1 executed, 12 up-to-date

Answer 1

就我而言，将资源文件从“全局可绘制”文件夹移动到特定的可绘制文件夹后，问题解决了。

例如： 如果您的资源文件在以下路径中

/drawable/btn_bg.xml

然后将其移至

/drawable-hdpi/btn_bg.xml 

将解决问题。

同样，任何图像文件，

例如： 如果您的资源文件在以下路径中

/drawable/welcome_illustration.png

然后将其移至

/drawable-hdpi/welcome_illustration.png