TextView updates after Android DatePicker call two times

Question

I am new in android, i want to show the dialog datepicker at the click even on TextView. However, it takes two times to set the date from datepicker on the textview.

TextView XML:

  <TextView
    android:id="@+id/dateTxtView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="8dp"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginTop="8dp"
    android:text="MM/DD/YYYY">

Activity Code:

private static final String TAG = "MainActivity";
private TextView mDisplayDate;
private DatePickerDialog.OnDateSetListener mDateSetListener;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    //Setting date at the start of the app
     mDisplayDate = (TextView) findViewById(R.id.dateTxtView);

            mDisplayDate.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Calendar mCalendar = Calendar.getInstance();
                    int year = mCalendar.get(Calendar.YEAR);
                    int month = mCalendar.get(Calendar.MONTH);
                    int day = mCalendar.get(Calendar.DAY_OF_MONTH);
                    DatePickerDialog dateDialog = new DatePickerDialog(
                            MainActivity.this,
                            android.R.style.Theme_Holo_Light_Dialog_MinWidth,
                            mDateSetListener,
                            year,month,day
                    );
                    dateDialog.setTitle("Select the date");
                    dateDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
                    dateDialog.show();
                    mDateSetListener = new DatePickerDialog.OnDateSetListener() {
                        @Override
                        public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                            month = month + 1;
                            Log.d(TAG,"date has been set");
                            String dateToday = month + "/" + dayOfMonth + "/" + year;
                            mDisplayDate.setText(dateToday);
                        }
                    };

                }
            });

First, i clicked the textview and show the dialog datepicker and after setting the date and click Ok, there were no value passed to the textview. at the second time, i clicked again and set another date, the date is now pass to the textview. Please help me resolve the problem.

Answer 1

You should declare and define your listener

                mDateSetListener = new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
                        month = month + 1;
                        Log.d(TAG,"date has been set");
                        String dateToday = month + "/" + dayOfMonth + "/" + year;
                        mDisplayDate.setText(dateToday);
                    }
                };

before you use it in the Picker constructor

DatePickerDialog dateDialog = new DatePickerDialog(
                        MainActivity.this,
                        android.R.style.Theme_Holo_Light_Dialog_MinWidth,
                        mDateSetListener,
                        year,month,day
                );