1-) Android RMOS - Lazerli barkod okuyucudan barkod okuma

EDİTTEXT COMPANENTİNİN EVENT OALYINDA OKUMA AŞAĞIDADIR

EditText editText;
TextView label;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    editText = findViewById(R.id.editText);
    label = findViewById(R.id.label);


    editText.setOnKeyListener(new View.OnKeyListener() {
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // If the event is a key-down event on the "enter" button
            if (event.getAction() == KeyEvent.ACTION_DOWN)
                if ((keyCode == KeyEvent.KEYCODE_ENTER)) {
                    Toast.makeText(MainActivity.this, "" + editText.getText(), Toast.LENGTH_SHORT).show();
                    label.setText(label.getText()+editText.getText().toString()+"\n");
                    editText.setText("");
                    editText.setNextFocusDownId(editText.getId());
                    return true;
                }
            return false;
        }


    });
}

HERHANGİ BİR COMPANENT OLMADAN OKUMA AŞAĞIDADIR

String barcode = "";
@Override
public boolean dispatchKeyEvent(KeyEvent e) {

    if(e.getAction()==KeyEvent.ACTION_DOWN){
        Log.i("aa","dispatchKeyEvent: "+e.toString());
        char pressedKey = (char) e.getUnicodeChar();
        barcode += pressedKey;
    }
    if (e.getAction()==KeyEvent.ACTION_DOWN && e.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
        Toast.makeText(getApplicationContext(),
                "barcode--->>>" + barcode, Toast.LENGTH_LONG)
                .show();

        barcode="";
    }

    return super.dispatchKeyEvent(e);
}