小编Ами*_* К.的帖子

我无法解决此问题，请帮助我！我遇到以下错误：

Could not find com.android.support:appcompat-v7:28.0.3.
Searched in the following locations:
    file:/C:/invincible/extras/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    file:/C:/invincible/extras/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
    file:/C:/invincible/extras/google/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    file:/C:/invincible/extras/google/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
    file:/C:/invincible/extras/android/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    file:/C:/invincible/extras/android/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
    file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    file:/C:/Program Files/Android/Android Studio/gradle/m2repository/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
    https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    https://dl.google.com/dl/android/maven2/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
    http://jcenter.bintray.com/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.pom
    http://jcenter.bintray.com/com/android/support/appcompat-v7/28.0.3/appcompat-v7-28.0.3.jar
Required by:
    project :app

Please install the Android Support Repository from the Android SDK Manager.
Open Android SDK Manager

我尝试下载，但显示如下：

{
  "errors" : [ {
    "status" : 404,
    "message" : "Could not find resource"
  } ]
}

我的build.gradle节目Gradle项目同步失败。基本功能将无法正常运行。

我的build.gradle代码：

***android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.example.myapplication"
        minSdkVersion 15
        targetSdkVersion …