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Mobgen - Android session MVP & Rx
The document discusses the implementation of an interstitial ad in an Android application using the MVP architecture with RxJava. It includes code examples for the interstitial activity and presenter, detailing how to load and display the ad while managing user interactions. Additionally, it touches on RxJava's use for data management and event handling, emphasizing its strengths and weaknesses in programming.
Mobgen - Android session MVP & Rx
- 1. Friday minutes MVP RxJava Javier dePedro Xes García
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- 5. Who is who? Activity Fragment CustomAndroid View New layer
- 6. Example Requirements - Close advertiseafter 3 secs - Close advertise when button pressed - Go to activity when pressed inside - Load ad from CMS
- 7. Model public class Interstitialimplements Parcelable { private String mTitle; private String mImage; private String mHref; }
- 8. View - Class publicclass InterstitialActivity extends BaseActivity implements InterstitialViewTranslator { private NetworkImageView mInterstitialImage; private View mLoader; private InterstitialPresenter mPresenter; }
- 9. View - OnCreate @Override publicvoid onCreate (Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_intersitital); mInterstitialImage = (NetworkImageView) findViewById(R.id.interstitial_image); mLoader = findViewById(R.id.loader); View closeButton = findViewById(R.id.interstitial_close); closeButton.setOnClickListener(this); mPresenter = new InterstitialPresenter(this, this); }
- 10. View - OnClick @Override publicvoid onClick (View v) { switch (v.getId()){ case R.id.interstitial_close: mPresenter.close(); break; case R.id.interstitial_image: mPresenter.goToInterstitial(); break; } }
- 11. View Translator interface publicinterface InterstitialViewTranslator { void startLoading(); void stopLoading(); void openNextActivity() void showInterstitial(Interstitial interstitial); }
- 12. View - Implementation @Override publicvoid startLoading () { mLoader.setVisibility(View.VISIBLE); } @Override public void stopLoading () { mLoader.setVisibility(View.GONE); } @Override public void openNextActivity () { Intent intent = new Intent(this, AnotherActivity.class); } @Override public void showInterstitial (Interstitial interstitial) { if(interstitial != null) { mInterstitialImage.setImageUrl(interstitial.getImage(), VolleyUtil.getImageLoader()); mInterstitialImage.setOnClickListener(this); } }
- 13. Presenter - Class publicclass InterstitialPresenter extends BasePresenter { private InterstitialViewTranslator mViewTranslator; private CloseRunnable mCloseRunnable; private Handler mHandler; }
- 14. Presenter - Constructor publicInterstitialPresenter(InterstitialViewTranslator viewTranslator){ mViewTranslator = viewTranslator; if(mViewTranslator == null){ throw new NullPointerException( "The presenter must have a view translator instance." ); } mHandler = new Handler(); restoreState(); // Loads a state if present to keep the time loadInterstitial(); }
- 15. Presenter - Actions privatevoid loadInterstitial (){ mViewTranslator.startLoading(); InterstitialWebService.fetchInterstitial(new IBackgroundTaskCallback<Interstitial>() { @Override public void onCompleted (CustomException e, Interstitial interstitial) { TotoLog.d("Interstitial loaded"); mViewTranslator.stopLoading(); if (interstitial != null) { onLoadInterstitial(interstitial); } else { close(); } } }); } private void onLoadInterstitial(Interstitial interstitial){ mViewTranslator.showInterstitial(interstitial); startTimer(); }
- 16. View - Showad @Override public void showInterstitial (Interstitial interstitial) { if(interstitial != null) { mInterstitialImage.setImageUrl(interstitial.getImage(), VolleyUtil.getImageLoader()); mInterstitialImage.setOnClickListener(this); } }
- 17. Presenter - Laststeps public void pause () { cancelTimerCallback(); saveState(); } public void destroy(){ cancelTimerCallback(); }
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- 20. RxJava - In Android…YES (Started on April 2013) (Android Weekly)
- 21. RxJava - What? BORN Deprecatingthe observer pattern Microsoft first library GOOD FOR - Data management - Stream read - Event handling - Thread sync - Standard across languages NOT SO GOOD FOR: - Sync programming - Noobies
- 22. RxJava - Philosophy Everythingis a Stream of data
- 23. RxJava - Observable SpecialObserver pattern ObservableClient data retrieval posibility condition Call to network Go to database Use a list Read file Awful name Asynchronous iterator subscribe observe
- 24. RxJava - Ex.Observable Observable.create(new Observable.OnSubscribe<Integer>() { @Override public void call(Subscriber<? super Integer> observer) { try { if (!observer.isUnsubscribed()) { for (int i = 1; i < 5; i++) { observer.onNext(i); } observer.onCompleted(); } } catch (Exception e) { observer.onError(e); } }
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- 26. RxJava - Ex.Subscription cityWebService.getCapitals() .flatMap(cityList -> Observable.from(cityList)) .filter(city -> city.getPopulation() > 500,000) .flatMap(city -> weatherService.getCurrentWeather(city)) // Runs requests in paralell .toSortedList((cw1,cw2) -> cw1.getCityName().compare(cw2.getCityName()));
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