Using integer from one class in another Android

Question

I need some help with using integer from one activity to another.

I am making some basic math program(game). It gets two random numbers, random operator, and 30 secs to solve math problems as much as you can.

If you solve problem u get 1 point.

Anyway right now, I want to get number of points that user have made and use it in another activity called *RankActivity*.

Main activity is called *BrzoRacunanjeActivity* and it contains button and one *int* called *poenibrojanje* which get number of points that user have made, and when I click on button, it opens new Activity with this line:

startActivity(new Intent(this, RankActivity.class));

As you can see another Activity is called RankActivity, and there I wrote :

*BrzoRacunanjeActivity a1 = new BrzoRacunanjeActivity();*

*System.out.println("Number of points:" + a1.poenibrojanje);;*

and I get all time this reuslt: 09-22 09:09:14.940: INFO/System.out(289): Number of points:0

so you want to pass integer value from one activity to another activity? — Siten
– Siten, Commented Sep 22, 2011 at 9:32
remove BrzoRacunanjeActivity a1 = new BrzoRacunanjeActivity();* — Siten
– Siten, Commented Sep 22, 2011 at 10:39
Hey dude, if you have time, can you take look at this problem: stackoverflow.com/questions/7515967/… — Zookey
– Zookey, Commented Sep 23, 2011 at 10:06

Knickedi · Accepted Answer · 2011-09-22 09:41:25Z

4

Try this:

Intent intent = new Intent(this, RankActivity.class);
intent.putExtra("points", pointsVar);
startActivity(intent);

In onCreate of RankActivity:

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

edited Sep 22, 2011 at 9:41

answered Sep 22, 2011 at 9:33

Knickedi

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3 Comments

Knickedi Over a year ago

I'm sorry for that, it's getIntent(). Hmpf and not getExtraInt. I corrected that...

Zookey Over a year ago

When I put brackets on getIntent,I get this error: The method getExtraInt(String) is undefined for the type Intent

Knickedi Over a year ago

Sorry again, see comment obove your's

Siten · Accepted Answer · 2011-09-22 09:45:36Z

4

so you want to pass integer value from one activity to another activity? right...

try:

Intent intent = new Intent(currentclass.this, destination.class);

intent.putExtra("point", pointvalue);

startActivity(intent);

at destination activity:

final int getpoint = getIntent().getExtras().getInt("point");

This will solve your problem.

edited Sep 22, 2011 at 9:45

answered Sep 22, 2011 at 9:36

Siten

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2 Comments

Zookey Over a year ago

I have tried, but without brackets on getIntent, it cant be resolved, and when I write getIntent().getExtraInt("point"); I get this error: The method getExtraInt(String) is undefined for the type Intent.

Siten Over a year ago

Have you extended class with Activity?

Niranj Patel · Accepted Answer · 2011-09-22 09:56:40Z

2

first of all make static variable like as public static int poenibrojanje; in your BrzoRacunanjeActivity.class file now you can use this variable in any other class like as

 BrzoRacunanjeActivity.poenibrojanje

or you can use putExtras(); method.

in you main activity.

Intent i = new Intent(this, RankActivity.class);
i.putExtra("Value",poenibrojanje);

in your next activity

int v = (getIntent().getExtras().getInt("Value")) ;

edited Sep 22, 2011 at 9:56

answered Sep 22, 2011 at 9:35

Niranj Patel

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6 Comments

Zookey Over a year ago

Well, that was first thing that i have tried. It seems that it works on regular Java, not on Android.

Niranj Patel Over a year ago

it is working also in android.. and you can also use putExtras

Zookey Over a year ago

It seems that it works with just putting: public static int poenibrojanje; Intent intent = new Intent(BrzoRacunanjeActivity.this, RankActivity.class); startActivity(intent); RankActivity: BrzoRacunanjeActivity a1 = new BrzoRacunanjeActivity(); System.out.println(a1.poenibrojanje);

Niranj Patel Over a year ago

i think dont need to write BrzoRacunanjeActivity a1 = new BrzoRacunanjeActivity(); but you can direct use like this BrzoRacunanjeActivity.poenibrojanje

Zookey Over a year ago

Yeah, I know, but I think this way is a little bit faster. Anyway, thanks for help. Cheers :)

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