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I'm running into this problem when using Android keyboard with Android O emulator. It always gives me the error saying
"Android Keyboard (AOSP) has stopped"
when I'm trying to press the "?123" button from the Android keyboard, and then the keyboard closes itself. 
This issue only occurs when I'm using emulator with API 26 (Android O) in Android Studio 3.0 Canary 7. Paste the error message in the following.
08-15 16:19:41.249 12833-12833/com.android.inputmethod.latin E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.android.inputmethod.latin, PID: 12833
com.android.inputmethod.keyboard.KeyboardLayoutSet$KeyboardLayoutSetException: java.lang.IllegalArgumentException: Empty keySpec at Binary XML file line #39
at com.android.inputmethod.keyboard.KeyboardLayoutSet.getKeyboard(KeyboardLayoutSet.java:207)
at com.android.inputmethod.keyboard.KeyboardSwitcher.setKeyboard(KeyboardSwitcher.java:153)
at com.android.inputmethod.keyboard.KeyboardSwitcher.setSymbolsKeyboard(KeyboardSwitcher.java:258)
at com.android.inputmethod.keyboard.internal.KeyboardState.setSymbolsKeyboard(KeyboardState.java:318)
at com.android.inputmethod.keyboard.internal.KeyboardState.toggleAlphabetAndSymbols(KeyboardState.java:262)
at com.android.inputmethod.keyboard.internal.KeyboardState.onPressSymbol(KeyboardState.java:411)
at com.android.inputmethod.keyboard.internal.KeyboardState.onPressKey(KeyboardState.java:370)
at com.android.inputmethod.keyboard.KeyboardSwitcher.onPressKey(KeyboardSwitcher.java:194)
at com.android.inputmethod.latin.LatinIME.onPressKey(LatinIME.java:1666)
at com.android.inputmethod.keyboard.PointerTracker.callListenerOnPressAndCheckKeyboardLayoutChange(PointerTracker.java:265)
at com.android.inputmethod.keyboard.PointerTracker.onDownEventInternal(PointerTracker.java:687)
at com.android.inputmethod.keyboard.PointerTracker.onDownEvent(PointerTracker.java:644)
at com.android.inputmethod.keyboard.PointerTracker.processMotionEvent(PointerTracker.java:604)
at com.android.inputmethod.keyboard.MainKeyboardView.processMotionEvent(MainKeyboardView.java:723)
at com.android.inputmethod.keyboard.MainKeyboardView.onTouchEvent(MainKeyboardView.java:710)
at android.view.View.dispatchTouchEvent(View.java:11721)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2961)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2593)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:445)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1828)
at android.app.Dialog.dispatchTouchEvent(Dialog.java:815)
at android.inputmethodservice.SoftInputWindow.dispatchTouchEvent(SoftInputWindow.java:93)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:407)
at android.view.View.dispatchPointerEvent(View.java:11960)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4776)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4590)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4181)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4147)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4274)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4155)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4331)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4181)
08-15 16:19:41.249 12833-12833/com.android.inputmethod.latin E/AndroidRuntime: at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4147)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4155)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4128)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6642)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6616)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6577)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6745)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:325)
at android.os.Looper.loop(Looper.java:142)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.lang.IllegalArgumentException: Empty keySpec at Binary XML file line #39
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.load(KeyboardBuilder.java:175)
at com.android.inputmethod.keyboard.KeyboardLayoutSet.getKeyboard(KeyboardLayoutSet.java:227)
at com.android.inputmethod.keyboard.KeyboardLayoutSet.getKeyboard(KeyboardLayoutSet.java:204)
... 60 more
Caused by: com.android.inputmethod.latin.utils.XmlParseUtils$ParseException: Empty keySpec at Binary XML file line #39
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseKey(KeyboardBuilder.java:482)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseRowContent(KeyboardBuilder.java:362)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseDefault(KeyboardBuilder.java:798)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseSwitchInternal(KeyboardBuilder.java:609)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseSwitchRowContent(KeyboardBuilder.java:595)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseRowContent(KeyboardBuilder.java:368)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseMerge(KeyboardBuilder.java:578)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseIncludeInternal(KeyboardBuilder.java:557)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseIncludeRowContent(KeyboardBuilder.java:518)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseRowContent(KeyboardBuilder.java:366)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseKeyboardContent(KeyboardBuilder.java:310)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseMerge(KeyboardBuilder.java:576)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseIncludeInternal(KeyboardBuilder.java:557)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseIncludeKeyboardContent(KeyboardBuilder.java:513)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseKeyboardContent(KeyboardBuilder.java:315)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.parseKeyboard(KeyboardBuilder.java:229)
at com.android.inputmethod.keyboard.internal.KeyboardBuilder.load(KeyboardBuilder.java:172)
... 62 more
Is it a bug from the Android O side?
818
The Android Open Source Project (AOSP) is an initiative created to guide development of the Android mobile platform. The Android platform consists of the operating system (OS), middleware and integral mobile applications.
If the emulator fails to launch due to the error vulkan-1. dll cannot be found , you probably need to update the emulator. To update the emulator in Android Studio, go to Tools > SDK Manager and install the latest stable version of Android platform.
This is a bug in the LatinIME input method in AOSP 8.0 (probably they didn't spot it because the AOSP keyboard isn't used in branded Android).
The fix is here: https://android-review.googlesource.com/#/c/platform/packages/inputmethods/LatinIME/+/469478/
126
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