Add values to Textview treatment

Question

I’m creating a financial control app, it’s a college project, in the place where it shows the value in the form I made a Textview that to be clicked opens a Dialog where I created a custom keyboard to put the value, when the user adds the value and clicks ok the value passes to Textview exactly how the user passed the value,what I want to do is treat this value, but I do not know how to treat this value since I have always worked with C# and started now android, ex: if the user adds a value without comma I want it to be added to string ,00 . if user add an ex value: 15.5 want to add after 5 + a 0.

Answer 1

Use the class Decimalformat to format numeric values, with it you can set a pattern and then format it, for example:

DecimalFormat df = new DecimalFormat("#,##0.00");
String formatted = df.format(12345.67);

textView.setText(formatted);

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Another option is to use the class Numberformat, with it you can form percentages, coins, whole values etc., for example:

NumberFormat nf = NumberFormat.getNumberInstance(Locale.GERMAN);
String formatted = nf.format(12345.67);
textView.setText(formatted);