Date Picker With Dialog box

 xml :-

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:hint="Select Date"
    android:id="@+id/tvDate"
    android:layout_marginTop="50dp"
    android:layout_centerHorizontal="true"
    android:textSize="30sp"/>

Java :- 

private TextView mDisplayDate;
private DatePickerDialog.OnDateSetListener mDateSetListener;


under oncreate 


mDisplayDate = (TextView) findViewById(R.id.tvDate);

mDisplayDate.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        Calendar cal = Calendar.getInstance();
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH);
        int day = cal.get(Calendar.DAY_OF_MONTH);

        DatePickerDialog dialog = new DatePickerDialog(
                Appoinment.this,
                android.R.style.Theme_Holo_Light_Dialog_MinWidth,
                mDateSetListener,
                year,month,day);
        dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        dialog.show();
    }
});

mDateSetListener = new DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker datePicker, int year, int month, int day) {
        month = month + 1;
        Log.d(TAG, "onDateSet: mm/dd/yyy: " + month + "/" + day + "/" + year);

        String date = month + "/" + day + "/" + year;
        mDisplayDate.setText(date);
    }
};