android - 如何在 gradle 中添加 appcompat？

Question

Could not find com.android.support:appcompat-v7:24.2.1.
Searched in the following locations:
  - https://jcenter.bintray.com/com/android/support/appcompat-v7/24.2.1/appcompat-v7-24.2.1.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
    project :app

这里 build.gradle :

apply plugin: 'com.android.application'

android {
    compileSdkVersion 30
    buildToolsVersion "24.0.3"
    useLibrary  'org.apache.http.legacy'

    defaultConfig {
        applicationId "com.rts.dcmote.dcmote"
        minSdkVersion 15
        targetSdkVersion 30
        versionCode 2
        versionName "1.1"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {

    //noinspection GradleCompatible
    implementation 'com.android.support:appcompat-v7:24.2.1'

}

Answer 1

更新(2020 年 6 月):
对于 Android Studio >=4.2.0，项目根目录下的 build.gradle 会是这样的:

buildscript {
    repositories {
            google()
            mavenCentral()
        }
...