android - How to display a substring in a Button -

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i have string value called string names;which received ble device. need display substring textview named line2. shows nothing, how can achieve this.

my code is.

string names; string i=(names.substring(1, 2)); string.valueof(i); line2.settext(i);

first try use methods assigned value names variable- string names = "0102151200". if works, there problem in program not assigning value in names variable.


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