How can i pass value from new activity to old activity in android

Question

Hi Friends,

i am using two Activity as Old Activity and New Activity,i want to pass some value from New Activity to Old Activity.how can i pass the value from New Activity to Old Activity please give some example code for that.... Thanks All

Answer 1

an example::

            Bundle bundle = new Bundle();
            bundle.putInt("newPicPosition", position);              
            Intent intent = new Intent(NewActivity.this, OldActivity.class);
            intent.putExtras(bundle);
            setResult(Activity.RESULT_OK, intent);
            finish();

use setResult()

public final void setResult (int resultCode, Intent data) Since: API Level 1 Call this to set the result that your activity will return to its caller.

Parameters::

resultCode The result code to propagate back to the originating activity, often RESULT_CANCELED or RESULT_OK
data The data to propagate back to the originating activity.

Answer 2

thanks Josrgesy, But i have one doubt,i can't get value from new activity,i am using Bundle b = getIntent().getExtras(); String s=b.getString("name"); Log.v("name",s); how can i get value? – sivaraj

private String s;

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) {     
    super.onActivityResult(requestCode, resultCode, data); 
    switch(requestCode) { 
    case (0) : { 
        if (resultCode == Activity.RESULT_OK) {                         
            if (data != null){
                Bundle b= data.getExtras();
                s= b.getString("name");
                Log.v("name",s); 
            } 
            break; 
        }
    }
    }
}

Update::

from your old activity you must start your newactivity with RequestCode = 0

   Bundle bundle = new Bundle();
    bundle.putString("foo",foovalue);
    Intent newIntent = new Intent(OldActivity.this, newActivity.class);
    newIntent.putExtras(bundle);
    startActivityForResult(newIntent, 0);   

very important startActivityForResult(newIntent, 0);