Question

How do I pass a value from one class to another.

eg

Class one

        public String aButton(View view) { 
        startActivity(new Intent(this, ContentHolder.class));
        this.choice = "kick_boxing.txt";

        return choice;

    }

This causes an activity to open. This method is called when the user clicks on the relevant button.

In this newly opened activity, I want to set the String to choice made by clicking one of several buttons. Since java doesn’t do multiple extending, I can’t extend the activity and this class, which I think I need in order to use inheritance.

So, what can I do to pass the choice from class A to Class B?

EDIT

            public String aButton(View view) { 
        Intent i = new Intent(getApplicationContext(), ContentHolder.class);
        i.putExtra("choice", choice);


        startActivity(new Intent(this, ContentHolder.class));
        this.choice = "kick_boxing.txt";

        return choice;

    }

and in the other class, just in the onCreate (I think of these as main methods?)

        public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    Context m_Context = getApplicationContext();

    TextView textview = new TextView(this);
    textview.setText("This is the content view");
    setContentView(textview);

    Bundle extras = getIntent().getExtras(); 
    if(extras !=null) {
    String value = extras.getString(key);
    }



    InputStream input;

    try {
        input = m_Context.getAssets().open(fileName);

key cannot be resolved.

Answer 1

Easy like this..

in your current activity, create an intent

Intent i = new Intent(getApplicationContext(), ActivityB.class);
i.putExtra("choice", value_of_the_data);

startActivity(i);
then in the other activity, retrieve those values.

Bundle extras = getIntent().getExtras(); 
if(extras !=null) {
String value = extras.getString("choice");
}