android-studio之设计 View 未在 Android Studio 上显示

我刚刚导入了一个项目，但是当我尝试进入设计 View 时显示:

顺便说一句，我目前的gradle版本是最新的26.0.2。我不确定该怎么做，有人有想法吗？

这里有一些 Gradle 脚本:

apply plugin: 'com.android.application' 
 
android { 
    compileSdkVersion 23 
    buildToolsVersion 
 
    defaultConfig { 
        applicationId "com.example.Ron.myapp" 
        minSdkVersion 15 
        targetSdkVersion 23 
        versionCode 1 
        versionName "1.0" 
    } 
    buildTypes { 
        release { 
            minifyEnabled false 
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
        } 
    } 
} 
 
dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    testCompile 'junit:junit:4.12' 
    compile 'com.android.support:appcompat-v7:23.1.1' 
    compile 'com.android.support:design:23.1.1' 
} 

和

// Top-level build file where you can add configuration options common to all sub-projects/modules. 
 
buildscript { 
    repositories { 
        jcenter() 
    } 
    dependencies { 
        classpath 'com.android.tools.build:gradle:3.0.1' 
 
        // NOTE: Do not place your application dependencies here; they belong 
        // in the individual module build.gradle files 
    } 
} 
 
allprojects { 
    repositories { 
        jcenter() 
    } 
} 
 
task clean(type: Delete) { 
    delete rootProject.buildDir 
} 

请您参考如下方法:

我自己解决了这个问题。我升级了 compileSdkVersion 以及 minSdkVersion 以及依赖项。现在看起来像这样:

apply plugin: 'com.android.application' 
 
android { 
    compileSdkVersion 26 
    buildToolsVersion 
 
    defaultConfig { 
        applicationId "com.example.Ron.myapp" 
        minSdkVersion 18 
        targetSdkVersion 26 
        versionCode 1 
        versionName "1.0" 
    } 
    buildTypes { 
        release { 
            minifyEnabled false 
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
        } 
    } 
} 
 
 
dependencies { 
    compile fileTree(dir: 'libs', include: ['*.jar']) 
    testCompile 'junit:junit:4.12' 
    compile 'com.android.support:appcompat-v7:26.0.2' 
    compile 'com.android.support:design:26.0.2' 
    compile 'com.android.support:cardview-v7:26.0.2' 
}