CODEWITHSUNDEEP
android
deucalion0
deucalion0

Reputation: 2440

Passing a simple variable value for use in another class in Android

What is the correct way to pass a simple variable which has its value set to use in another class? I have a counter which is incremented with a button press and when counter = 3 a method is called which loads another activity which loads another screen with a string which states the button was pressed. Here is where I want to include the number 3 passed from the counter variable in the previous class, but I am not sure the correct way to do this. I tried creating an instance of the class and connecting to the variable that way but the value is never passed and it is always 0.

Upvotes: 3

Views: 39411

Answers (5)

Satheeshkumar
Satheeshkumar

Reputation: 452

You can pass that value using the intent

Intent new_intent=new Intent(this,SecondActivity.class);
intent.putExtra("counter",10); //here the value is integer so you use the  new_intent.putExtra(String name,int value)
startActivity(new_intent);

After that in the second activity class you can get that that values using Bundle

Bundle bundle = getIntent().getExtras();
int count = bundle.getInt("counter");

I think this may help you.

Upvotes: 1

KV Prajapati
KV Prajapati

Reputation: 94625

You may pass value via Intent - resource bundle.

Pass value from current activity,

Intent intent=new Intent(this,ResultActivity.class);
intent.putExtra("no",10);
startActivity(intent);

and in ResultActivity (onCreate),

Bundle bundle=getIntent().getExtras();
int value=bundle.getInt("no");

In case of non-activity classes, you may define a public method.

For instance,

public Integer getValue() //returns a value
{
  return 10;
}

Or

public void setValue(Integer value)
{
  ...
}

Upvotes: 5

Nikunj Patel
Nikunj Patel

Reputation: 22066

You can also do it through define variable as "static" in one activity and in second activity use that variable with using <<classname>>.<<variableb>>

ex:

Activity1:

Static var = 5;

Activity2:

System.out.println(Activity1.var);

Upvotes: 1

Cehm
Cehm

Reputation: 1512

one way to do it would be when you build your new intent to do :

Intent itn = new Intent(...,...);
itn.putExtra(KEY,VALUE);
startctivity(itn);

And on the other class do something like :

this.getIntent.getStringExtra(KEY);
or
this.getIntent.getWHATEVERYOURVARIABLEWASExtra(KEY);

Hope it helps you, and it's the better way to pass arguments between 2 activities :)

Upvotes: 1

Altaaf
Altaaf

Reputation: 527

Try following code, 

public class First
{
   private static int myVarible = 0;


    private void myMethod()
    {
         myVariable = 5; // Assigning a value;
    }

    public static int getVariable()
    {
        return myVariable;
    }
}

public class Second
{
    int i = First.getVariable();  // Accessing in Another class
}

Upvotes: 10

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