Android Question B4XFloatTextField Crashes App

james_sgp

Active Member
Licensed User
Longtime User
I`ve just noticed a problem with the B4XFloatTextField in my app when I press the Backspace ket to delete its contents; when I`ve deleted everything if I press Backspace again the app crashes. Is this a normal phenomenon on B4XFloatTextField?

java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Boolean
at RAID.FirstAid.main$HandleKeyDelayed.runDirectly(main.java:232)
at RAID.FirstAid.main.onKeyDown(main.java:219)
at android.view.KeyEvent.dispatch(KeyEvent.java:3350)
at android.app.Activity.dispatchKeyEvent(Activity.java:3451)
at androidx.core.app.ComponentActivity.superDispatchKeyEvent(ComponentActivity.java:108)
at androidx.core.view.KeyEventDispatcher.dispatchKeyEvent(KeyEventDispatcher.java:84)
at androidx.core.app.ComponentActivity.dispatchKeyEvent(ComponentActivity.java:126)
at androidx.appcompat.app.AppCompatActivity.dispatchKeyEvent(AppCompatActivity.java:535)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
at androidx.appcompat.app.AppCompatDelegateImpl$AppCompatWindowCallback.dispatchKeyEvent(AppCompatDelegateImpl.java:2533)
at androidx.appcompat.view.WindowCallbackWrapper.dispatchKeyEvent(WindowCallbackWrapper.java:59)
at com.android.internal.policy.DecorView.dispatchKeyEvent(DecorView.java:564)
at android.view.ViewRootImpl$ViewPostImeInputStage.processKeyEvent(ViewRootImpl.java:6035)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5890)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:5343)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5396)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:5362)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5521)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:5370)
 
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james_sgp

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Longtime User
B4X: 
Sub Activity_KeyPress (KeyCode As Int)
    If KeyCode = KeyCodes.KEYCODE_BACK Then
        If Msgbox2("You hit the BACK button, do you want to close the app?", "", "Yes", "", "No",LoadBitmap (File.DirAssets, "question.png")) = DialogResponse.POSITIVE Then
            ExitApplication
        Else
            Return
        End If
    End If
End Sub
 
Upvote 0

DonManfred

Expert
Licensed User
Longtime User
You never should use MsgBox. Use the Async methods instead.

Example:
B4X: 
Msgbox2Async("Delete?", "Title", "Yes", "Cancel", "No", Null, False)
Wait For Msgbox_Result (Result As Int)
If Result = DialogResponse.POSITIVE Then
   '...
End If

untested code
B4X: 
Sub Activity_KeyPress (KeyCode As Int)
    If KeyCode = KeyCodes.KEYCODE_BACK Then
        Msgbox2Async("You hit the BACK button, do you want to close the app?", "", "Yes", "", "No", LoadBitmap (File.DirAssets, "question.png"), False)
        Wait For Msgbox_Result (Result As Int)
        If Result = DialogResponse.POSITIVE Then
            ExitApplication
        End If
    Else
        Return
    End If
End Sub

Maybe you need to create a resumeable sub to show the msgbox.
 
Upvote 0

Erel

B4X founder
Staff member
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Upvote 0

james_sgp

Active Member
Licensed User
Longtime User
Erel, thanks...i'd copied from somewhere. But will make corrections.
Much appeeciated.
 
Upvote 0
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