Android Question Detect key press

[Ayushjain]

Hi...
I am not able to figure out how to start.
This will be a kind of service that starts only when a key is pressed using the keyboard (hard/soft), keep the service running till the keyboard (or the edit text box, in case of hard keyboard) is visible.
I have checked many threads that teach how to check if keyboard is visible, so no problem with this part.
And it should read the text that has been typed.

I am a novice developer in basic4android... I have good knowledge in visual basic, which is the reason why i chose B4A to code the application/service idea i have in mind.

Please help.. Thanks

 

[Erel]

Do you want to catch the key press in your activity or when other applications are visible?

 

[Ayushjain]

Hi Erel, Thanks for replying.
I want to catch key press only to start my service app (the key press acts as a confirmation that the keyboard and edittext are visible)
Is there any other way to know if the edit text is visible?

 

[ddahan]

Erel, I'm interested in the second part of your answer, is it possible when other applications are visible ?

 

[Ayushjain]

Do you want to catch the key press in your activity or when other applications are visible?

Hi Erel,
I want to know a way that tells my service app to start whenever the edit text has focus... So i thought key press would be the best way... But if there is a better way, then pls tell me.
After my service app starts, it should be able to log the keys pressed and act accordingly...
Pls help, thanks

 

[Erel]

You can only intercept key presses when your activity is in the foreground.

 

[enrique1]

Hi,

Can you please tell me how can I intercept keyboard key pressed in an Activity in foreground? I need it to alert about one issue. For instance, if "a" letter is pressed, a MsgBox would be showed.

Thanks!

 

[JonPM]

Can you give a little more background on how your app works? For instance, is the user typing something into an Edittext, and if they select letter "a" then msgbox is to be shown?

 

[enrique1]

Yep, I need to detect when "a", "s", "d", "w", "ctrl", "shift" and "space" are pressed in a webview in order to control an one online game. My latest post was a simple explanation to clarify the issue ^^.

Thanks for your answer JonPM

 

[enrique1]

Solved! Editing the online game, I can write with javascript the values in the HTML, then, I can trap them from the webview with WebViewExtras library.

Here you have the simple code :

I've used WebViewExtras, exactly these methods:

Dim aux As WebViewExtras

Sub Activity_Create(FirstTime As Boolean)
(...)
aux.addJavascriptInterface(WebView1, "B4A")
(...)
End sub

Sub WebView1_PageFinished (Url As String)
(...)
Javascript="B4A.CallSub('ProcessHTML', false, javascriptCodeHereToGetAValue")"
aux.executeJavascript(WebView1, Javascript)
(...)
End sub

Sub ProcessHTML(Html As String)
'Actions here
End Sub