Android Question How can I turn string to byte and turn byte to string?

[Alphaw]

Dear all, I am trying to connect android with an arduino, and I follow the step from b4r tutorial, https://www.b4x.com/android/forum/threads/hc-05-classic-bluetooth.66677/
I just use the b4a part and want to add a textbox to send the message to arduino.

However, I fail for turning the editText1.text to byte and compile the file. Why? Am I lack of any library? How can I solve it.

Besides, I also cannot show any words except integer in my app. How can I turn the byte to string?

Thank you.

 

[Cableguy]

Try the new serializel ibrary, with it you can turn into bytes any object, send it and convert it back in the receiver

 

[Alphaw]

Oh, I see. But will I still cannot compile the file? Actually I do not know what wrong with the code.

 

[Cableguy]

Have made the appropriate changes in order to use serialisation?
What error do you get?
Can you post your code?

 

[Alphaw]

My code is just attached in first post and the photo show that I cannot compile to an app as the problem with byte.

 

[Cableguy]

So you haven't change your original code?
USE serialisation in your code, and if that doesn't work THEN post any relevant code.
Your current code error tells you that it cannot parse a byte into a bytes array...
Dealing with strings in arduino is somewhat complex, so Erel created an "universal" serialisation lib to be used in cases like this one

 

[Alphaw]

So you haven't change your original code?
USE serialisation in your code, and if that doesn't work THEN post any relevant code.
Your current code error tells you that it cannot parse a byte into a bytes array...
Dealing with strings in arduino is somewhat complex, so Erel created an "universal" serialisation lib to be used in cases like this one

Oh, I see. Let me try first. Thank you.

 

[Cableguy]

Try the example found here, I think it does almost exactly what you need.
https://www.b4x.com/android/forum/t...e-objects-instead-of-bytes.72404/#post-460481

 

[Erel]

You should post the relevant code and error message as text instead of screenshots.

String.GetBytes returns an array of bytes.

Dim b() As Byte = EditText1.Text.GetBytes("UTF8") 'convert to bytes
Log(BytesToString(b, 0, b.Length, "UTF8")) 'convert to string

I recommend using B4RSerializator.