concatenation of text

i am a new programmer in android application.

how can i concatenate the value in Edit Text? i.e when i was entering the values in edit 开发者_如何学JAVAtext box like 1234567890 the values should appear like 123-456-7890 in the same edit text.that means concatenate the by default value as "-" at every 3 digits.

is there any chance to do this

please help me

Thanks in advance

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Try this answered question about Masked Input Using EditText Widget in Android