How to get back the result from Child activity to Parent in android?

Question

I\'am starting a child activity on click of a button from Parent. And i\'am calculating some result (of type string) in child activity and finishing the child to come back t

Answer 1

In Parent Activity

Intent intent = new Intent(getApplicationContext(), yourChildActivity.class);
intent.putExtra("key", "value");
startActivityForResult(intent, ACTIVITY_CONSTANT);

in child activity to sent back result of your parent activity through

Intent data = new Intent();
data.putExtra("key1", "value1");
data.putExtra("key2", "value2");
// Activity finished return ok, return the data
setResult(RESULT_OK, data);
finish();

and get child activity result information in your parent activity

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
        if (data.hasExtra("key1") && data.hasExtra("key2")) {
            Toast.makeText(
                this,
                "Your reult is :  "data.getExtras().getString("key1") + " " + data.getExtras().getString("key2"),
                Toast.LENGTH_SHORT).show();
        }
    }
}