androidandroid-edittext

Is there a way to define a min and max value for EditText in Android?


I want to define a min and max value for an EditText.

For example: if any person tries to enter a month value in it, the value must be between 1-12.

I can do it by using TextWatcher but I want to know if there is any other way to do it in layout file or elsewhere.

Edit: I don't want to limit character count. I want to limit the value. For example, if I limit month EditText w characters when I enter 12 it will accept it but if I enter 22 it mustn't accept it while I am entering.


Solution

  • First make this class :

    package com.test;
    
    import android.text.InputFilter;
    import android.text.Spanned;
    
    public class InputFilterMinMax implements InputFilter {
    
        private int min, max;
    
        public InputFilterMinMax(int min, int max) {
            this.min = min;
            this.max = max;
        }
    
        public InputFilterMinMax(String min, String max) {
            this.min = Integer.parseInt(min);
            this.max = Integer.parseInt(max);
        }
    
        @Override
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {   
            try {
                int input = Integer.parseInt(dest.toString() + source.toString());
                if (isInRange(min, max, input))
                    return null;
            } catch (NumberFormatException nfe) { }     
            return "";
        }
    
        private boolean isInRange(int a, int b, int c) {
            return b > a ? c >= a && c <= b : c >= b && c <= a;
        }
    }
    

    Then use this from your Activity :

    EditText et = (EditText) findViewById(R.id.myEditText);
    et.setFilters(new InputFilter[]{ new InputFilterMinMax("1", "12")});
    

    This will allow user to enter values from 1 to 12 only.

    EDIT :

    Set your edittext with android:inputType="number".

    You can find more details at https://www.techcompose.com/how-to-set-minimum-and-maximum-value-in-edittext-in-android-app-development/.

    Thanks.