今天，在毫無征兆的情況下AndroidStudio又抽風了，搞了大半天，試了網上眾多方案，終於解決了這個問題。咱們一步一步來
第一步：這是最開始的bug
Error:Failed to resolve: com.android.support:support-annotations:27.0.1
Install Repository and sync project
Open File
Show in Project Structure dialog
Error:Failed to resolve: com.android.support:appcompat-v7:27.0.1
Install Repository and sync project
Open File
Show in Project Structure dialog
這個問題可以通過修改project的gradle，添加maven { url “https://maven.google.com” }即可，如圖 
同時，打開SDK Manager 
檢查repository是否已經下載，並安裝 
第二步：問題還是沒有解決，甚至報錯，習慣就好
Error:A problem occurred configuring project ‘:app’.
Could not resolve all dependencies for configuration ‘:app:_debugApkCopy’.
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified
MakerOnly0818:app:unspecified > com.gyf.barlibrary:barlibrary:2.1.4
MakerOnly0818:app:unspecified > MakerOnly0818:imagepicker:unspecified
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > com.roughike:bottom-bar:1.3.4
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > com.bigkoo:convenientbanner:2.0.5
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > com.zhy:flowlayout-lib:1.0.3
Could not find com.android.support:support-v4:27.0.1.
Required by:
MakerOnly0818:app:unspecified > MakerOnly0818:slidingmenu:unspecified
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > cn.yipianfengye.android:zxing-library:2.2
Could not find com.android.support:support-v4:27.0.1.
Required by:
MakerOnly0818:app:unspecified > cn.yipianfengye.android:zxing-library:2.2
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > me.weyye.hipermission:library:1.0.3
Could not find com.android.support:appcompat-v7:27.0.1.
Required by:
MakerOnly0818:app:unspecified > MakerOnly0818:NIM_Android_UIKit-master:unspecified
MakerOnly0818:app:unspecified > MakerOnly0818:NIM_Android_UIKit-master:unspecified > com.android.support:design:25.0.1
Could not find com.android.support:support-v4:27.0.1.
Required by:
MakerOnly0818:app:unspecified > com.twitter.sdk.android:tweet-ui:3.1.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-base:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-banner:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-interstitial:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-rewardedvideo:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-native-static:4.11.0
MakerOnly0818:app:unspecified > com.twitter.sdk.android:twitter-mopub:3.1.0 > com.mopub:mopub-sdk:4.11.0 > com.mopub:mopub-sdk-native-video:4.11.0
這個問題，可以通過注釋掉module的gradle中的androidTestCompile部分代碼即可。
第三步:然后又爆出這個問題，問題已經好轉，報錯信息越來越少了哈哈
Error:(15, 21) No resource found that matches the given name: attr ‘android:keyboardNavigationCluster’.
通過下面這個鏈接的一個回答解決了，stackoverflow可能打不開，下面我介紹一下：如圖就是解決方案
https://stackoverflow.com/questions/45301203/no-resource-found-that-matches-the-given-name-attr-androidkeyboardnavigationc/45307273
的 
簡單說就是修改module的gradle
1.把compileSdkVersion改26
2.buildToolsVersion改”26.0.1”
3.compile ‘com.android.support:appcompat-v7:26.0.1’替換之前的版本
4.sync后會提示下載更新，完成后問題就解決了。
雖說問題解決了，但是也許解決方案並不是萬能的，如有其他情況未能解決也歡迎評論，同時qq群492462202歡迎交流。感覺有幫助就贊助一下吧 ！
引用原文：https://blog.csdn.net/waa_studio/article/details/78732460
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如果有什么問題，歡迎大家一起探討，代碼如有問題，歡迎各位大神指正！