当我将旧项目更新为新项目时​​，启动失败

Question

意外令牌：

  

com.android.support:appcompat-v7:25.4.0 @第27行，第20列。

     

实施'com.android.support:appcompat-v7:25.4.0'

1个错误

    apply plugin: 'com.android.application'

    android {
        compileSdkVersion 25
        buildToolsVersion
        defaultConfig {
            applicationId "stking.age"
            minSdkVersion 19
            targetSdkVersion 25
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }

    dependencies {
        compile fileTree(dir: 'libs', include: ['*.jar'])
        androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        Implementation 'com.android.support:appcompat-v7:25.4.0'
        Implementation 'com.android.support.constraint:constraint-layout:1.1.2'
        testImplementation 'junit:junit:4.12'
    }

Answer 1

• 首先设置{strong> buildToolVersion ，例如buildToolsVersion "25.0.2"
• 将Implementation更改为implementation

完整的gradle文件如下所示。

 apply plugin: 'com.android.application'

    android {
        compileSdkVersion 25
        buildToolsVersion "25.0.2"
        defaultConfig {
            applicationId "stking.age"
            minSdkVersion 19
            targetSdkVersion 25
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            }
        }
    }

    dependencies {
        compile fileTree(dir: 'libs', include: ['*.jar'])
        androidTestImplementation('com.android.support.test.espresso:espresso-core:2.2.2', {
            exclude group: 'com.android.support', module: 'support-annotations'
        })
        implementation 'com.android.support:appcompat-v7:25.4.0'
        implementation 'com.android.support.constraint:constraint-layout:1.1.2'
        testImplementation 'junit:junit:4.12'
    }

Answer 2

添加buildToolsVersion '23.0.3'

它应该像这样buildToolsVersion '27.0.3'

并将您的Implementation更改为implementation