Add string to listview

[Hugge Nilsson]

I have an app that the user can use to make a few selections. The selections are saved in a String. I can print out the String in a small textview in the same activity. I want to pass it to another activity and then print the string in a listview or maybe a recyclerview would be better?

I really have a hard time understanding how to add to listview.

I know it is a bit messy since Im reusing an older code but I hope you understand it. Anyway here is my code so far:

public class MainActivity extends AppCompatActivity {
    private TextView quantityTextView, orderSummary ;
    private CheckBox Skagen, PulledPork;

    private int numberOfMackor;

    /**
     * This app displays an order form to order sandwiches
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        quantityTextView = findViewById(R.id.quantityTextView);
        orderSummary = findViewById(R.id.orderSummaryTextView);

        Skagen = findViewById(R.id.skagenCheckBox);
        PulledPork = findViewById(R.id.pulledPorkCheckBox);

        numberOfMackor = Integer.parseInt((String) quantityTextView.getText());

    }

    /**
     * This method is called when the order button is clicked
     */
    public void submitOrder(View view) {
        orderSummaryDisplay();

        String message ;
        if (numberOfMackor <= 1) {message = getString(R.string.coffee);
        }else{message = getString(R.string.coffees);
        }

        Toast orderMessage = Toast.makeText(this,
                numberOfMackor + " " + message + getString(R.string.ordered),
                Toast.LENGTH_LONG);
        orderMessage.show();
    }

    /**
     * This method is called when the plus button is clicked
     */
    public void increment(View view) {
        ++numberOfMackor;

        displayQuantity(numberOfMackor);
        displayPrice();
    }

    /**
     * This method is called when the minus button is clicked
     */
    public void decrement(View view) {
        --numberOfMackor;

        if (numberOfMackor<0){
            numberOfMackor=0;
            Toast toast = Toast.makeText(this
                    , R.string.below_zero_cups
                    , Toast.LENGTH_LONG);
            toast.show();
        }
        displayQuantity(numberOfMackor);
        displayPrice();
    }

    /**
     * Calculates the price per coffee and total cost
     */
    private int calcPrice(){
        int basePrice = 1;
        int priceOfCoffee = basePrice;

        if (PulledPork.isChecked()){
            priceOfCoffee = basePrice + 1;}

        if(Skagen.isChecked()){
            priceOfCoffee = basePrice + 2;}

        int totalAmount = priceOfCoffee * numberOfMackor;
        return totalAmount;
    }

    /**
     * This method is responsible for displaying total quantity of coffees
     */
    private void displayQuantity(int quantity){
        TextView quantityTextView = findViewById(
                R.id.quantityTextView);
        quantityTextView.setText("" + quantity);
    }

    /**
     * This method is responsible for the displaying the total price
     */
    private void displayPrice(){
        TextView priceTextView = (TextView) findViewById(
                R.id.displayPriceTextView);
        priceTextView.setText(getString(R.string.price) + NumberFormat
                .getCurrencyInstance(Locale.US)
                .format(calcPrice()));
    }

    /**
     * This method is responsible for displaying the order summary
     */
    private void orderSummaryDisplay(){
        EditText nameEditText = findViewById(R.id.userNameEditText);
        String Name = nameEditText.getText().toString();

        boolean isSkagen = Skagen.isChecked();

        boolean isPulledPork = PulledPork.isChecked();

        int Quantity = numberOfMackor;

        int totalPrice = calcPrice();

        String message = "Name: "+ Name +
                "\nAdd skagen? " + isSkagen +
                "\nAdd pulled pork ? " + isPulledPork +
                "\nQuantity: " + Quantity +
                "\nTotal: " + NumberFormat.getCurrencyInstance(Locale.US)
                .format(totalPrice) +
                "\nThank you!";
        orderSummary.setText(message);

    }

    /**
     * updates the display price corresponding to the checkboxes state
     */
    public void updateView(View view) {
        displayPrice();
    }
} 

[Carey Brown]

Is this for ANDROID ?

[Hugge Nilsson]

Yes! Sorry I forgot to mention that

[Jason Edwards]

To move a string from 1 activity to another,

// first activity 
String value="Hello world";
Intent i = new Intent(CurrentActivity.this, NewActivity.class);    
i.putExtra("key",value);
startActivity(i);

// second activity 
Bundle extras = getIntent().getExtras();
if (extras != null) {
    String value = extras.getString("key");

 

[Hugge Nilsson]

Thank you! And how do I add that to a Listview in the other activity. I can't wrap my head around it

[Tim Moores]

That's line 8 - 10 in Jason's code. Put that in the onCreate method of the other activity, and then you can do with "value" whatever you like.

[Jason Edwards]

Hugge Nilsson wrote:Thank you! And how do I add that to a Listview in the other activity. I can't wrap my head around it

Your welcome Hugge Nilsson.
Just wondering, have you developed android Applications on Android Studio?

As you need code for the GUI (xml), and Java/Kotlin code for the back end. The code you put up looks like a coffee app built in Java code, only as a test( online android course).

For Android development, most developers are moving over to kotlin, its faster and and easier to work with.

[Hugge Nilsson]

Yes Jason it's not compeletely my code but I use it as a base to get all the functions. I'm still an absolute beginner.

[Jason Edwards]

Hugge Nilsson wrote:Yes Jason it's not completely my code but I use it as a base to get all the functions. I'm still an absolute beginner.

If your absolute beginner, you need to start from the beginning, I would start off with this course https://www.youtube.com/watch?v=uRyvNKRkwbs
I have been building apps on android studio for a few years, If you get stuck let me know and I will do my best to help.