How to pass an integer variable to another class

Question

I have one class with public int Result; Later in the game I use that variable to store number of points user makes. Now, I have another activity/class called Result and I have a textView in that activity and I need to use the Result variable to sexText to that textView. I made an instance of my game class and called it g in the Result class and than I did something like this:

score = (TextView) findViewById(R.id.tvResult);
        score.setText("Game over!\nYour score is:\n" + k.Result);

But I always get 0. I think it's because I get default value of the variable, not the real one. How can I pass the final value added to my variable after game ends?

I also tried this in the game activity, to pass the variable as an intent:

Intent i = new Intent(Quiz.this, Result.class);
            i.putExtra("newResultVariable", Result);
            startActivity(i);

Also get 0.

Pass a Bundle with Intent.

Gaurav Agarwal
– Gaurav Agarwal

2013-03-03 17:42:52 +00:00
Commented Mar 3, 2013 at 17:42 — Gaurav Agarwal
– Gaurav Agarwal, Commented Mar 3, 2013 at 17:42
@codingcrow putExtra() is fine.

A--C
– A--C

2013-03-03 17:47:03 +00:00
Commented Mar 3, 2013 at 17:47 — A--C
– A--C, Commented Mar 3, 2013 at 17:47
@A--C Yes, it fine both the ways.

Gaurav Agarwal
– Gaurav Agarwal

2013-03-03 18:22:47 +00:00
Commented Mar 3, 2013 at 18:22 — Gaurav Agarwal
– Gaurav Agarwal, Commented Mar 3, 2013 at 18:22

Ajay S · Accepted Answer · 2013-03-03 18:26:11Z

2

To pass the variable as an intent.

To do programming in any language you should follow naming convention of language.

In Quiz.java

Intent intent = new Intent(context,Result.class);
intent.putExtra("newResultVariable", result);
startActivity(intent);

In Result.java to get value.

public void onCreate(Bundle bundle) {
    ....
    int score = 0;
    TextView scoreTextView = (TextView) findViewById(R.id.tvResult);

    Bundle extras = getIntent().getExtras(); 
    if(extras !=null) {
       score = extras.getInt("newResultVariable", 0);
    }

     scoreTextView.setText("Game over!\nYour score is:\n" + score); 
     ....
}

edited Mar 3, 2013 at 18:26

answered Mar 3, 2013 at 17:42

Ajay S

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3 Comments

Nabukodonosor Over a year ago

Nope, didn't work, still 0. Just to be clear, this part is good: score.setText("Game over!\nYour score is:\n" + result); ? Also get the error "the local variable score is never read" for your int score.

Ajay S Over a year ago

@user2083882 now try it. i have edited my answer to make easy for you.

Nabukodonosor Over a year ago

OK, now it works. I think it was some name conflict, cause my textview was also named score. Thanks a lot.

Android Killer · Accepted Answer · 2013-03-03 17:45:55Z

1

First of all the variable name you have given is not good as it is not following CamelCase

so it should be result rather than Result.Now try as follows:

In Quiz Activity

Intent intent = new Intent(getApplicationContext(),Result.class);
intent.putExtra("result_variable", result);
startActivity(intent);

In Result Activity

getIntent().getIntExtra("result_variable", 0);

answered Mar 3, 2013 at 17:45

Android Killer

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1 Comment

Nabukodonosor Over a year ago

Sorry about the CamelCase. It didn't work. Still 0. Maybe I'm doing something wrong, although I copied your code.

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