I have a EditText where I enter a number. What I want is to

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Editorial Team

Asked: June 11, 20262026-06-11T01:51:36+00:00 2026-06-11T01:51:36+00:00

I have a EditText where I enter a number. What I want is to

0

I have a EditText where I enter a number.

What I want is to forbid this number to have more than “x” number of decimals, for example, three.

I have tried to do it by using the listener, but I don´t find exactly the solution…….

precioProducto.addTextChangedListener(new TextWatcher(){
                public void afterTextChanged(Editable s) {

                }
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                }
                public void onTextChanged(CharSequence s, int start, int before, int count) {
                    String[] numeroDecimal = s.toString().split(",");
                    if(numeroDecimal[1].length()==3){

                    }
                }
            });

How can i “lock” the EditText to be more than 3 decimals??

Thanks a lot.

I tried what Vinay Wadhwa told me, but after trying a little bit and so on, sometimes(not everytimes), the application breaks giving me the next log:

09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): 09-07 11:37:32.119: E/AndroidRuntime(14586): FATAL EXCEPTION: main
java.lang.StackOverflowError
at android.text.method.ReplacementTransformationMethod$ReplacementCharSequence.getChars(ReplacementTransformationMethod.java:151)
at android.text.TextUtils.getChars(TextUtils.java:70)
at android.text.TextUtils.indexOf(TextUtils.java:103)
at android.text.StaticLayout.generate(StaticLayout.java:182)
at android.text.DynamicLayout.reflow(DynamicLayout.java:283)
at android.text.DynamicLayout.(DynamicLayout.java:169)
at android.widget.TextView.makeSingleLayout(TextView.java:6318)
at android.widget.TextView.makeNewLayout(TextView.java:6216)
at android.widget.TextView.checkForRelayout(TextView.java:6744)
at android.widget.TextView.setText(TextView.java:3306)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:78)
at android.widget.TextView.setText(TextView.java:3137)
at es.wul4.zarko.CrearPedidos$25.onTextChanged(CrearPedidos.java:686)
at android.widget.TextView.sendOnTextChanged(TextView.java:7634)
at android.widget.TextView.setText(TextView.java:3309)
at android.widget.TextView.setText(TextView.java:3162)
at android.widget.EditText.setText(EditText.java:

I don´t know why is giving me this problem, not even everytimes…….just sometimes after “touching” too many times the text inside

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1 Answer

Editorial Team · Answer 1 · 2026-06-11T01:51:38+00:00

add a class variable which stores the last previous value of the edit text

say String lastVal

 precioProducto.addTextChangedListener(new TextWatcher(){
                    public void afterTextChanged(Editable s) {

                    }
                    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

                    }
                    public void onTextChanged(CharSequence s, int start, int before, int count) {                      

                        String[] numeroDecimal = s.toString().split(",");
                        if(numeroDecimal[1].length()>=3){
                          precioProducto.setText(lastVal);
                        }
                        lastVal=s.toString();
                    }
                });

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