在Android应用程序中操作视图的位置？

Question

我有一个MainActivity，它创建了MyOwnTextToSpeech对象，它负责一些tts的东西。它还必须操纵一些UI视图（例如，在某些TextView中设置文本）。我该如何实现UI的这种操作？将MainActivity的引用传递给MyOwnTextToSpeech（以及其他对象）并在MainActivity中准备一些公共方法来操作UI或者我应该为所有视图（TextView等）创建getter来访问它们是不错的主意？或者也许有一种方法不传递对MainActivity的引用（我在某处读到，因为一些内存泄漏的东西，传递对Activities的引用不好）？

更新

        public class MainActivity extends Activity {
           @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            MyOwnTextToSpeech myTts = new MyOwnTextToSpeech(context);
        }
}

我的班级负责tts。

public class MyOwnTextToSpeech implements TextToSpeech.OnInitListener {

    private TextToSpeech tts;

    public MyOwnTextToSpeech (Context ctx) {
        tts = new TextToSpeech(ctx, this);
    }

    @Override
    public void onInit(int status) {
        if (status == TextToSpeech.SUCCESS) {

            tts.setOnUtteranceProgressListener(new UtteranceProgressListener() {

                @Override
                public void onStart(String utteranceId) {
                }

                @Override
                public void onError(String utteranceId) {

                }

                @Override
                public void onDone(final String utteranceId) {

                    // here I want some UI update stuff

                }
            });
            int result = tts.setLanguage(new Locale("pl", "PL"));
            if (result == TextToSpeech.LANG_MISSING_DATA
                    || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                Log.e("TTS", "This Language is not supported");
            }

        } else {
            Log.e("TTS", "Initilization Failed!");
        }

    }