How to restrict to input time for edittext in android

Question

I have to allow user to input only time in ##:## format in edit text on the fly, is there any way to achieve it? I have used below code but it doest not working.

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Answer 1

//THis handles the input for the date and time at the runtime and all the //invalid atttempt are automatically consumed
//this is an alternative to regex expression that you can implement

//using the input regulation for the time data
    timeField.addTextChangedListener(new TextWatcher() {
        String beforeTXT;
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                Log.i("before TEXT TEXXT", " this : "+s+" and "+start+" and "+count+"and "+after);
                beforeTXT= ""+s;
        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            int input ;

            //first determine whether user is at hrs side or min side
            if (s.toString().equals("")){
                return;
            }
            if(s.toString().length()>2 && start<=2){ //means the user is at hour side
                input = Integer.parseInt(s.toString().substring(0,1)) % 10;

            }
            else if(s.toString().length()>2 && start>=3) {//means that user is at min side
                input = Integer.parseInt("0"+s.toString().substring(3))%10;

            }
            else if(s.toString().indexOf(":")==1){ // if we have for eg 1: or 0: then we take first character for parsing
                input = Integer.parseInt(s.toString().charAt(0)+"");
            }
            else{ //else it is default where the user is at first position
                input = Integer.parseInt(s.toString()) % 10;
            }

            //Special case where 00: is autommatically converted to 12: in 12hr time format
            if(s.toString().contains("00:")){
                Log.i("INsisde )))","i am called ");
                timeField.setText("12:");
               return;
            }

            //Now we manipulate the input and its formattin and cursor movement
            if(input<=1 && start ==0){ //thiis is for first input value to check .... time shouldnt exceed 12 hr
                //do nothing
            }
            else if (input>1 && start==0){ //if at hour >1 is press then automaticc set the time as 02: or 05: etc
             timeField.setText("0"+s+":");
            }
            else if(input>2 && start==1 && !s.toString().startsWith("0")){ //whe dont have greater than 12 hrs so second postionn shouldn't exceed value 2
                timeField.setText(beforeTXT);
            }
            else if(start==1 && !beforeTXT.contains(":")){  //if valid input 10 or 11 or 12 is given then convert it to 10: 11: or 12:
                timeField.setText(s.toString()+":");

                if(s.toString().length()==1 && s.toString().startsWith("0")){
                timeField.setText("");
                }
                if(s.toString().startsWith("1")&& s.toString().length()==1){ //on back space convert 1: to 01:
                    timeField.setText("0"+timeField.getText().toString());
                }

           }
            else if(start == 3 && input >5 ){ //min fig shouldn't exceed 59 so ...if at first digit of min input >5 then do nothing or codpy the earlier text
                timeField.setText(beforeTXT);
            }
           else if (start>4 && s.toString().length()>5){ // the total string lenght shouldn't excced 5
                timeField.setText(beforeTXT);
            }
            else if(start<2 && beforeTXT.length()>2){
                timeField.setText(beforeTXT);

            }


        }

        @Override
        public void afterTextChanged(Editable s) {

            Log.i("after  TEXT TEXXT", " this : "+s);
            timeField.setSelection(timeField.getText().toString().length());

        }
    });