gistfile1.txt

private TextView textViewStartDate;

private String startDate = "";
private String endDate = "";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_create_wallet);
        
    textViewStartDate = findViewById(R.id.text_view_startDate);
        
    findViewById(R.id.buttonPickStartDate).setOnClickListener(view -> showStartDatePickerDialog(getStartDateListener()));
    
}

public void showDatePickerDialog(DatePickerDialog.OnDateSetListener listener){
    DatePickerDialog startDatePickerDialog = new DatePickerDialog(
        this,
        listener,
        Calendar.getInstance().get(Calendar.YEAR),
        Calendar.getInstance().get(Calendar.MONTH),
        Calendar.getInstance().get(Calendar.DAY_OF_MONTH)
        );
    star`tDatePickerDialog.show();
}

@Override
public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
    if (startDate.isEmpty()) {
        startDate = "Day/Month/Year:" +dayOfMonth +"/" + month + "/" +year;    
        textViewStartDate.setText(startDate);

        showDatePickerDialog();
    } else {
        endDate = "Day/Month/Year:" +dayOfMonth +"/" + month + "/" +year;
        //create another textview where you can set the endate
    }
}

public DatePickerDialog.OnDateSetListener getStartDateListener() {
	return new DatePickerDialog.OnDateSetListener() {
		public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
		boolean showEndPicker = startDate.isEmpty();
			startDate = "Day/Month/Year:" +dayOfMonth +"/" + month + "/" +year;    
        	textViewStartDate.setText(startDate);
    		
    		//show end picker only when start date is set first time
    		if (showEndPicker) {
        		showDatePickerDialog(getEndDateListener());
    		}
    	}
	};
}

public DatePickerDialog.OnDateSetListener getEndDateListener() {
	return new DatePickerDialog.OnDateSetListener() {
		public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) {
			endDate = "Day/Month/Year:" +dayOfMonth +"/" + month + "/" +year;    
        	textViewEndDate.setText(startDate);
    	}
	};
}