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【UI Automator 2.0】UiDevice#takeScreenshot()でエミュレータが固まる問題の対応

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UI AutomatorでSpoonを試そうと思ってスクリーンショットをUiDevice#takeScreenshot()で取ろうとしたところ、エミュレータが固まってしまった。一度この状態になるとテスト全体が失敗し、エミュレータを再起動するしかなくなってしまった。

Issue 227734: Emulator hangs after UiDevice.getInstance(InstrumentationRegistry.getInstrumentation()).takeScreenshot(path)

によるとどうやらエミュレータのSDKをアップデートすれば直るらしい。

確かに以下環境にアップデートしてエミュレータを作り直したところ動くようになった。

  • Google APIs Intel X86 Atom_64 System Image(API23) 20
  • Android Emulator 26.0.0
  • Android SDK Platform-Tools 26.0.1
  • Android SDK Tools 26.0.1
  • Intel x86 Emulator Accelerator(HAXM Installer) 6.1.1
  • Android Support Repository 47.0.0
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