android - 在 Android 中实现 Material Design 时出错

Question

我一直在阅读新 Material 设计网站，但我在实现它时遇到了问题。

我目前正在使用的应用程序是一个简单的测试应用程序，只有一个按钮和一些 TextView 。

在 gradle 文件中放置 implementation 'com.google.android.material:material:1.0.0-alpha1' 后出现问题。

这是我的 build.gradle(app) 文件

apply plugin: 'com.android.application'
apply plugin: 'io.fabric'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.example.user.firebasemessagingtest"
        minSdkVersion 19
        targetSdkVersion 27
        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'])
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    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'

    implementation 'com.google.firebase:firebase-core:15.0.2'
    implementation 'com.google.firebase:firebase-messaging:15.0.2'
    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.2'
    implementation 'com.google.firebase:firebase-ml-vision:15.0.0'
    implementation 'com.google.android.material:material:1.0.0-alpha1'
}

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

我有 4 个错误，

error: resource android:attr/dialogCornerRadius not found.
error: resource android:attr/fontVariationSettings not found.
error: resource android:attr/ttcIndex not found.
error: failed linking references.

我已将 maven 包含在项目 gradle 文件中，如文档中所述。

Answer 1

试试这个

更改compileSdkVersion和支持库版本

compileSdkVersion  'android-P'
Support Libraries to '28.0.0-alpha1'

和使用

 api 'com.android.support:design:28.0.0-alpha1'

编辑

Update your SDK Platform update - Android P Preview (latest)

and also make targetSdkVersion 'P'

比Clean-Re_Build-Run你的项目

编辑2

apply plugin: 'com.android.application'

android {

    compileSdkVersion  'android-P'

    defaultConfig {
        applicationId "com.example.nilesh.testapp"
        minSdkVersion 19
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    defaultConfig {
        vectorDrawables.useSupportLibrary = true
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
    implementation 'com.android.support:support-v4:28.0.0-alpha1'
    compile 'com.android.support:design:28.0.0-alpha1'
    compile 'com.android.support:cardview-v7:28.0.0-alpha1'

    implementation 'com.android.support.constraint:constraint-layout:1.1.0'

    testImplementation 'junit:junit:4.12'

    implementation 'com.google.android.material:material:1.0.0-alpha1'


    implementation 'com.google.firebase:firebase-core:15.0.2'
    implementation 'com.google.firebase:firebase-messaging:15.0.2'
    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.2'
    implementation 'com.google.firebase:firebase-ml-vision:15.0.0'

    androidTestImplementation 'com.android.support.test:runner:1.0.1'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
}
repositories {
    mavenCentral()
}

希望对你有帮助