事情是這樣的，學藝不精，導致 用上了AS，連什么是library dependency，module dependency 還有那個file dependency
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想要導入v13包。這種和普通的什么chat那種不一樣，不是add as library
而是 file--> project structure -> 選擇左側邊欄的module下的APP --> 選擇右上方dependencies模塊 --> 點擊右上角的小+ --> 選擇 library dependenciy
下面出來一堆選項，選擇即可
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如果！是add as library這樣的！
運行起來就會爆出如下錯誤
Error:Error converting bytecode to dex:
Cause: com.android.dex.DexException: Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat$AccessibilityServiceInfoVersionImpl;
:app:transformClassesWithDexForDebug FAILED
Error:Execution failed for task ':app:transformClassesWithDexForDebug'.
> com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException: java.util.concurrent.ExecutionException: com.android.ide.common.process.ProcessException: org.gradle.process.internal.ExecException: Process 'command 'D:\Program Files\Java\jdk1.8.0_101\bin\java.exe'' finished with non-zero exit value 2
多虧了學長，還有自己雖然大三仍然能舔着個大臉去問。。