錯誤展示：
錯誤提示：
Unable to resolve dependency for ':app@debug/compileClasspath': Could not find any version that matches com.android.support:appcompat-v7:29.+.
Unable to resolve dependency for ':app@debugAndroidTest/compileClasspath': Could not find any version that matches com.android.support:appcompat-v7:29.+.
Unable to resolve dependency for ':app@debugUnitTest/compileClasspath': Could not find any version that matches com.android.support:appcompat-v7:29.+.錯誤信息:
解決辦法：
因為提示：com.android.support:appcompat-v7:29.+ 沒有；
打開 build.gradle 》》
將
implementation 'com.android.support:appcompat-v7:29.+'
替換為
implementation 'com.android.support:appcompat-v7:28.0.0-rc01'
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