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Android Build a Simple Android App (2014) Improving Our Code Adding More Colors

Posted by Razvan Sighinas
Razvan Sighinas
2,018 Points

It doesn't recongnize ColorWhell class.Why?

It gives me this error:Error:(19, 13) error: cannot find symbol class ColorWheel

private ColorWheel mColorWheel = new ColorWheel();

and also

int color = mColorWheel.getColor();

At ColorWheel it says:Cannot resolve symbol 'ColorWheel' At getColor it says:Cannot resolve method 'getColor()'

4 Answers

Benoit Noyou
Benoit Noyou
2,163 Points
Benoit Noyou
Benoit Noyou
2,163 Points

Did you create the ColorWheel.java file and replace the various "fact" variables for "color"?

Razvan Sighinas
Razvan Sighinas
2,018 Points
Razvan Sighinas
Razvan Sighinas
2,018 Points

yes.

public class ColorWheel {

//Member variable(propertis about the object)
public String[] mColors = {
        "#39add1",
        "#3079ab",
        "#c25975",
        "#e15258",
        "#f9845b",
        "#838cc7",
        "#7d669e",
        "#53bbb4",
        "#51b46d",
        "#e0ab18",
        "#637a91",
        "#f092b0",
        "#b7c0c7"
};

// Methods(abilities:things that object can do.)
public String getColor() {



    String color = "";
    // randomly select a fact
    Random randomGenerator = new Random(); //Construct a new Random number generator
    int randomNumber = randomGenerator.nextInt(mColors.length);


    color = mColors[randomNumber];
    int colorAsInt = Color.parseColor(color);

    return colorAsInt;
}

}

Benoit Noyou
Benoit Noyou
2,163 Points
Benoit Noyou
Benoit Noyou
2,163 Points

You must change the return type of the getColor() method to int, you should see a squiggly line under your return statement.

public String getColor(...

...  return colorAsInt;
Razvan Sighinas
Razvan Sighinas
2,018 Points

I did it but getColor() and ColorWheel are still red.

erickrusznis
erickrusznis
1,245 Points
erickrusznis
erickrusznis
1,245 Points

I am having the same issue as this person, the private ColorWheel mColorWheel = new ColorWheel(); This throws an error "cannot resolve symbol 'ColorWheel' " Both ColorWheel's are red, as is the getColor method at the bottom. I did create the ColorWheel.java class, here is the FunFactsActivity.java public class FunFactsActivity extends AppCompatActivity { private FactBook mFactBook = new FactBook(); private ColorWheel mColorWheel = new ColorWheel(); // declare our view variables. private TextView mFactTextView; private Button mShowFactButton; private RelativeLayout mRelativeLayout;

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

    // Assign the Views from the layout file to the corrssponding variables.
    mFactTextView = (TextView) findViewById(R.id.factTextView);
    mShowFactButton = (Button) findViewById(R.id.showFactbutton);
    mRelativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);

    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            String fact = mFactBook.getFact();
            int color = mColorWheel.getColor();
            // Update the screen with our dynamic fact
            mFactTextView.setText(fact);
            mRelativeLayout.setBackgroundColor(color);
        }
    };
    mShowFactButton.setOnClickListener(listener);
}

}

Here is the ColorWheel.java class: public class ColorWheel { // fields (member variables) - properties about the object private String[] mColors = { "#39add1", // light blue "#3079ab", // dark blue "#c25975", // mauve "#e15258", // red "#f9845b", // orange "#838cc7", // lavender "#7d669e", // purple "#53bbb4", // aqua "#51b46d", // green "#e0ab18", // mustard "#637a91", // dark gray "#f092b0", // pink "#b7c0c7" // light gray };

// Methods - actions object can take
public int getColor(){
    String color;

    // Randomly select a fact.
    Random randomGenerator = new Random();
    int randomNumber = randomGenerator.nextInt(mColors.length);
    color = mColors[randomNumber];
    int colorAsInt = Color.parseColor(color);

    return colorAsInt;
}

}