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Empty intent extras in onActivityResult
Intent intent = new Intent(this, Second.class);
startActivityForResult(intent, 1);

Intent intent = new Intent();
intent.putExtra("a", "la-la-la");
setResult(RESULT_OK, intent);
finish();

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

        if ((resultCode == Activity.RESULT_OK) && (currentTask != null)) {
            //Here is empty intent extas!!!

            Log.d("OrderActivity", "RESULT!!");
        }
    }

Intent IntentViewer = new Intent(source.this, destination.class);
IntentViewer.putExtra("first", "first data");
IntentViewer.putExtra("second", "second data");
IntentViewer.putExtra("last", "last data");
startActivity(IntentViewer);

@Override
public void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    final Intent intent = getIntent();
    vGetIntentData(intent);
}

private void vGetIntentData(Intent intent){
     if (intent.hasExtra("first")){
             sFirstString= intent.getStringExtra("first");
     }

     if(intent.hasExtra("second")){
             sSecondString = intent.getStringExtra("second");
     }

     if(intent.hasExtra("last")){
             sLastString = intent.getStringExtra("last");
     }
}