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Invalid double: "gagajgalk"
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java.lang.NumberFormatException: Invalid double: ""	at java.lang.StringToReal.invalidReal(StringToReal.java:63)	at java.lang.StringToReal.parseDouble(StringToReal.java:267)	at java.lang.Double.parseDouble(Double.java:301)	at josephshin.tempconv.MainActivity$2.afterTextChanged(MainActivity.java:56)	at android.widget.TextView.sendAfterTextChanged(TextView.java:9271)	at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:12015)	at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:1047)	at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:564)	at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:225)	at android.text.SpannableStringBuilder.delete(SpannableStringBuilder.java:34)	at android.text.method.BaseKeyListener.backspaceOrForwardDelete(BaseKeyListener.java:106)	at android.text.method.BaseKeyListener.backspace(BaseKeyListener.java:51)	at android.text.method.BaseKeyListener.onKeyDown(BaseKeyListener.java:215)	at android.text.method.NumberKeyListener.onKeyDown(NumberKeyListener.java:138)	at android.widget.TextView.doKeyDown(TextView.java:7187)	at android.widget.TextView.onKeyDown(TextView.java:6994)	at android.view.KeyEvent.dispatch(KeyEvent.java:3249)	at android.view.View.dispatchKeyEvent(View.java:9838)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:1739)	at com.android.internal.policy.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:2808)	at com.android.internal.policy.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1838)	at android.app.Activity.dispatchKeyEvent(Activity.java:2977)	at android.support.v7.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:543)	at android.support.v7.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:53)	at android.support.v7.app.AppCompatDelegateImplBase$AppCompatWindowCallbackBase.dispatchKeyEvent(AppCompatDelegateImplBase.java:312)	at com.android.internal.policy.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:2682)	at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:5273)	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5226)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4726)	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4692)	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4834)	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4700)	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4891)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4726)	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4692)	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4700)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4673)	at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7359)	at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7237)	at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7198)	at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:4310)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:158)	at android.app.ActivityThread.main(ActivityThread.java:7225)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)