Android Studio导航抽屉在设计视图上显示黑屏

问题描述：

我安装了Android Studio 3.1.3，但只显示黑屏

I installed Android studio 3.1.3 and it's only showing a dark screen

build.gradle:

    apply plugin: 'com.android.application'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.herson.freed"
        minSdkVersion 23
        targetSdkVersion 28
        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-v7:28.0.0-alpha3'
    implementation 'com.android.support:design:28.0.0-alpha3'
    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
     implementation 'com.android.support:support-v4:28.0.0-alpha3'
    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'
}

它在gradle中给出了此错误:

It gives this error in gradle:

support-v4:28.0.0-alpha中的
无法解决依赖性"错误

"Unable to resolve dependency" error in support-v4:28.0.0-alpha

请帮助，我还是Android的新手.

Please help, I'm still new to Android.

答

确保您已连接到良好的网络

Make sure you are connected to a good network

选中此复选框

转到>文件->其他设置->在构建，执行和部署下->您将看到Gradle.取消选中复选框离线工作

Goto >file -> other settings -> Under build, execution, and deployment -> you will see Gradle. uncheck the checkbox offline work

尝试将Google maven存储库添加到应用程序的build.gradle文件中:

Try adding Google maven repository into app's build.gradle file:

repositories {
    maven { url "https://maven.google.com" }
}

重建您的项目.

如果第1步不起作用，请从项目根文件夹中删除gradle，然后重新构建项目.

If step 1 won't work, remove gradle from your project root folder and rebuild your project again.

Android Studio导航抽屉在设计视图上显示黑屏

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