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Android Studio升级到3.2.1后，运行项目报如下错：

Could not find com.android.tools.build:aapt2:3.2.1-4818971.

Searched in the following locations:     file:/D:/AndroidStudio/sdk/extras/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom     file:/D:/AndroidStudio/sdk/extras/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-windows.jar     file:/D:/AndroidStudio/sdk/extras/google/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom     file:/D:/AndroidStudio/sdk/extras/google/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-windows.jar     file:/D:/AndroidStudio/sdk/extras/android/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom     file:/D:/AndroidStudio/sdk/extras/android/m2repository/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-windows.jar     https://jcenter.bintray.com/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971.pom     https://jcenter.bintray.com/com/android/tools/build/aapt2/3.2.1-4818971/aapt2-3.2.1-4818971-windows.jar Required by:     project :app  

解决方法很简单：

在项目的build.gradle文件中，新增一行google()即可解决

allprojects {

    repositories {         jcenter()         google()//新增这一行     } }  

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