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java.lang.NullPointerException: 	at android.support.test.uiautomator.UiAutomatorBridge.setOnAccessibilityEventListener(UiAutomatorBridge.java:78)	at android.support.test.uiautomator.QueryController.(QueryController.java:58)	at android.support.test.uiautomator.UiAutomatorBridge.(UiAutomatorBridge.java:66)	at android.support.test.uiautomator.InstrumentationUiAutomatorBridge.(InstrumentationUiAutomatorBridge.java:35)	at android.support.test.uiautomator.UiDevice.(UiDevice.java:106)	at android.support.test.uiautomator.UiDevice.getInstance(UiDevice.java:269)	at myPackageName.MyTestClass.(MyTestClass.java:34)	at java.lang.reflect.Constructor.constructNative(Native Method)	at java.lang.reflect.Constructor.newInstance(Constructor.java:417)