Android Money Input with fixed decimal

Question

How do you create an edittext entry that formats input in money format only? When the user enters 5, I want the input to look like \"$0.05\" and when they then enter 3, th

Answer 1

This answer is based on Zds' answer (which in turn was based on ninjasense's answer), but this should resolve the cursor position issue:

if(!text.matches("^\\$(\\d{1,2})(\\.\\d{2})?$")) {
    int originalCursorPosition = view.getSelectionStart();
    int cursorOffset = 0;

    boolean cursorAtEnd = originalCursorPosition == text.length();

    String userInput= ""+text.replaceAll("[^\\d]", "");
    StringBuilder cashAmountBuilder = new StringBuilder(userInput);

    while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0')           {  
        cashAmountBuilder.deleteCharAt(0);
        cursorOffset--;
    }
    while (cashAmountBuilder.length() < 3) {
        cashAmountBuilder.insert(0, '0');
        cursorOffset++;
    }
    cashAmountBuilder.insert(cashAmountBuilder.length() - 2, '.');
    cashAmountBuilder.insert(0, '$');

    view.setText(cashAmountBuilder.toString());
    view.setSelection(cursorAtEnd ? view.getText().length() : originalCursorPosition + cursorOffset);
}

Notes:

• The following is in a TextWatcher.onTextChanged
• I'm using a different regex than other answers, which keeps the price to < $100
• 'view' is the editText, 'text' is the string contents
• this has worked for me using an EditText with a maxLength of 6 (i.e. $00.00)