TimePickerDialog

        exTv = (TextView) findViewById(R.id.ex_tv);
 
        exBtn = (Button) findViewById(R.id.ex_btn);
 
 
        exBtn.setOnClickListener(new View.OnClickListener() {
 
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Calendar time = Calendar.getInstance();
 
                int hour = time.get(Calendar.HOUR_OF_DAY);
                int minute = time.get(Calendar.MINUTE);
 
                TimePickerDialog mTimePicker;
                mTimePicker = new TimePickerDialog(MainActivity.this, new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {
 
                        String hour = Integer.toString(selectedHour);
                        String min = Integer.toString(selectedMinute);
                        exTv.setText(hour + ":" + min);
 
                    }
                }, hour, minute, false);
 
                mTimePicker.setTitle("");
 
                mTimePicker.show();
 
            }
        });