Android Studio :ERROR: Unable to resolve dependency for ':[email protected]/compileClasspath': Could

報錯描述 如圖，在網上找了好久都沒有找到解決辦法，煩的一p,都說是 http proxy 的問題，試了也沒用。 Unable to resolve dependency for ‘:[email protected]/compileClasspath’: Could not resolve com.android.support:appcompat-v7:28.0.0. Open File Sho

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