Intent extras in Android

Question

In my Andoird application, i pass extras to other intent by below code :

Intent i = new Intent(getApplicationContext(), NoteDetail.class);
i.putExtra("note_id", note_id);
startActivityForResult(i, 100);

in noteDetail, get extras by this code :

if (i.hasExtra(Key_NOTE_ID)) {

    // Must Update the note
    KEY_HAS_NOTE_ID = true;
    noteId = i.getStringExtra(Key_NOTE_ID);
    Log.i("Note Id is >>", noteId.toString());

    ConnectionDetector cd = new ConnectionDetector(
            getApplicationContext());
    if (cd.isConnectedToInternet()) {

        new GetNoteDetail().execute();

    } else {

        Toast.makeText(NoteDetail.this,
                R.string.not_connected_to_internet, Toast.LENGTH_SHORT)
                .show();
    }
}

Application work correctly and extras pass and receive correctly until press back button on mobile phone and back to previous activity. again when i press the noteDetail button and go to noteDetail activity the previous note_id has remained and not clear. i want to clear extras when user press back button on mobile phone.

Answer 1

In onPause() use:

if (getIntent().hasExtra(Key_NOTE_ID)) getIntent().removeExtra(Key_NOTE_ID);