What is Intent from onActivityResult Parameters

Question

Here is my first activity code from where I call the second Activity:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {         


        

Answer 1

Third parameter is Intent, which you sent from the sub-Activity(Second Activity, which is going to finish).

If you want to perform some calculations or fetch some username/password in sub-activity and you want to send the result to the main activity, then you place the data in the intent and will return to the Main activity before finish().

After that you will check in onActivityResult(int, int, Intent) in main activity for the result with Intent parameter.

Example:: MainActivity:

public void onClick(View view) {
  Intent i = new Intent(this, subActivity.class);
  startActivityForResult(i, REQUEST_CODE);
} 

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (resultCode == RESULT_OK && requestCode == REQUEST_CODE) {
    if (data.hasExtra("username") && data.hasExtra("password")) {
      String username =  data.getExtras().getString("username");
      String password =  data.getExtras().getString("password");

    }
  }

subActivity::

@Override
public void finish() {
  // Create one data intent 
  Intent data = new Intent();
  data.putExtra("username", "Bla bla bla..");
  data.putExtra("password", "*****");
  setResult(RESULT_OK, data);
  super.finish();
}