Android EditText 输入随着我们在上面打字而改变（数字）

Question

i'm making an app that can calculate payOnloan,prepaid,etc(3 months project from my supervisor, i'm having an intern).But i got stuck at some point.I want to have an EditText where it will automatically change its value, in this case numbers as we input the value.Example:

whene type 1 in EditText output 1 when we type 10 in EditText output 10 when we type 100 in EditText output 100 when we type 1.000 in EditText output 1.000 when we type 10.000 in EditText output 10.000 and so on..(until 1.000.000.000.000) note:for one EditText,i mean we give the input on it and the output also on the same edittext

is it possible to do this?i've tried almost everything related like number separator or decimal format or currency convert.But none of that works.

i cant attach image file sry about that,

thanks in advance,

Regards, George

Answer 1

So if I understand you correctly, you have an Edit text box and whatever you type inside that it needs to be reflected on some other view? If that is the case, a text watcher is what you are looking for.

Here is an example of text watcher:

final TextWatcher mTextEditorWatcher = new TextWatcher(){
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {


        }

        public void onTextChanged(CharSequence s, int start, int before, int count) {
            yourView.setText(yourEditText.getText().toString()); 
        }

        public void afterTextChanged(Editable s) {

        }
    };

Pay attention to: public void onTextChanged However beware of null values!

Check the length of your number in the text watcher on textChange and use the following to add decimals:

  DecimalFormat df = new DecimalFormat("#.00");
  String inputFormated = df.format(yourEditText.getText.toString());
  System.out.println(inputFormated);

Answer 2

How did you define your decimal Format?

Try something like this:

DecimalFormat formattedStuff = new DecimalFormat("#,###,###,###,##0");
String receivedStr = yourEditText.getText().toString();
yourEditText.setText(formattedStuff.format(receivedStr));