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Android Build an Interactive Story App (Retired) Finishing the User Interface Using a Model in the Controller

Posted by JESUS PADILLA
JESUS PADILLA
3,081 Points

i try to do: mPassengersField.setText(Integer.toString(mSpaceship.getNumPassengers)); //The compiler say is wrong

i tried to convert int to String, something is wrong... help

LandingActivity.java 
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class LandingActivity extends Activity {

    public Button mThrustButton;
    public TextView mTypeLabel;
    public EditText mPassengersField;

    public Spaceship mSpaceship;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_landing);

        mThrustButton = (Button)findViewById(R.id.thrustButton);
        mTypeLabel = (TextView)findViewById(R.id.typeTextView);
        mPassengersField = (EditText)findViewById(R.id.passengersEditText);

        mSpaceship = new Spaceship("FIREFLY");
        mTypeLabel.setText(mSpaceship.getType());
        String num = Integer.toString(mSpaceship.getNumPassengers);
        mPassengersField.setText(num);
    }
}
Spaceship.java 
public class Spaceship {
    private String mType;
    private int mNumPassengers = 0;

    public String getType() {
      return mType;
    }

    public void setType(String type) {
      mType = type;
    }

    public int getNumPassengers() {
      return mNumPassengers;
    }

    public void setNumPassengers(int numPassengers) {
      mNumPassengers = numPassengers;
    }

    public Spaceship() {
      mType = "SHUTTLE";
    }

    public Spaceship(String type) {
      mType = type;
    }
}

2 Answers

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

I just completed the exercise with the following code in the onCreate method. If you're still getting an error, can you post what the error says?

mSpaceship = new Spaceship("FIREFLY");
mTypeLabel.setText(mSpaceship.getType());
mPassengersField.setText(mSpaceship.getNumPassengers() + "");
JESUS PADILLA
JESUS PADILLA
3,081 Points

Jon, thanks a lot, but the compiler is still saying is wrong.

Bummer! There is a compiler error. Please click on preview to view your syntax errors!

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Hmm, that is odd since it marked mine as correct a couple of minutes ago.

Could you repost the entirety of your code again with the modification and the error, if it gives one.

JESUS PADILLA
JESUS PADILLA
3,081 Points

(```) import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.EditText;

public class LandingActivity extends Activity {

public Button mThrustButton;
public TextView mTypeLabel;
public EditText mPassengersField;

public Spaceship mSpaceship;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_landing);

    mThrustButton = (Button)findViewById(R.id.thrustButton);
    mTypeLabel = (TextView)findViewById(R.id.typeTextView);
    mPassengersField = (EditText)findViewById(R.id.passengersEditText);

    // Add your code here!
    mSpaceship = new Spaceship("FIREFLY");
    mTypeLabel.setText(mSpaceship.getType());
    mPassengersField.setText(mSpaceship.getNumPassengers() + "");

); } } (```)

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

Try removing your last ');'

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class LandingActivity extends Activity {

    public Button mThrustButton;
    public TextView mTypeLabel;
    public EditText mPassengersField;

    public Spaceship mSpaceship;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_landing);

        mThrustButton = (Button)findViewById(R.id.thrustButton);
        mTypeLabel = (TextView)findViewById(R.id.typeTextView);
        mPassengersField = (EditText)findViewById(R.id.passengersEditText);

        // Add your code here!

      mSpaceship = new Spaceship("FIREFLY");
      mTypeLabel.setText(mSpaceship.getType());
      mPassengersField.setText(mSpaceship.getNumPassengers() + "");
    }
}
JESUS PADILLA
JESUS PADILLA
3,081 Points

OMG... i did't see... thanks a LOT JON!!!!!!!

Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

No problem!

Jon Kussmann
PLUS
Jon Kussmann
Courses Plus Student 7,254 Points
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

A simple way of changing an int to a String is to add "" to the int.

String numAsString = mSpaceship.getNumPassengers() + "";
Jon Kussmann
Jon Kussmann
Courses Plus Student 7,254 Points

You could use your method of converting an int to a String, but you need to add '()' to the end of "getNumPassengers" since that's how you call a method, as opposed to attempting to access a public field directly.

 String num = Integer.toString(mSpaceship.getNumPassengers());
JESUS PADILLA
JESUS PADILLA
3,081 Points

It not working yet. The question is : Finally, notice that our Spaceship class has a new field to store the number of passengers in the ship. Use the method to get the number of passengers for mSpaceship, and then set the text for mPassengersField to this value. Note: You will need to convert the int value to a String!

i tried to:

// Add your code here! mSpaceship = new Spaceship("FIREFLY"); mTypeLabel.setText(mSpaceship.getType()); //------------------------------------------------------------------------------------ mPassengersField.setText(mSpaceship.getNumPassengers() + "" );

Not working.

//------------------------------------------------------------------------------------ mPassengersField.setText(Integer.toString(mSpaceship.getNumPassengers()));

Not working

//------------------------------------------------------------------------------------------- mPassengersField.setText(String.valueOf(mSpaceship.getNumPassengers()));

and not working.... i do not what is!...

thank you for help me.