小编M.U*_*man的帖子

interface temp
{
   public int add(int a,int b)
   {
      return a+b;
   }
}

我们可以在接口中实现上面的方法,或者我们只需要在接口中定义方法.

在我的Android应用程序中使用谷歌地图活动时,我收到此错误.

"无法解析com.google.android.gms:play-services:11.8.0."

项目级 Gradle文件:

buildscript {

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

应用程序级 Gradle文件:

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    compile 'com.android.support.constraint:constraint-layout:1.0.2'
    testCompile 'junit:junit:4.12'
    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.google.android.gms:play-services:11.8.0'
}