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O SUCESSO DO SEU APP ESTÁ NOS DETALHES@SuelenGC
Sudeste
Suelen GCgithub.com/suelengc
@suelengc
2006
2015
SOME NUMBERSExistem mais de 1 milhão de aplicativos no
Google Play.
NÚMERO DE APPS
Agosto/2014
GROWTH OF NUMBER OF APP IN THEGOOGLE PLAY STORE FROM DECEMBER 2009 TO JULY 2015
USUÁRIOS ATIVOS
Agosto/2014
NÃO BASTA TER UM APLICATIVO, ELE
PRECISA SER O MELHOR!
DESIGNEntre um feio e um bonito que faça a mesma
coisa, os usuários irão ficar com o bonito!
SEE MATERIAL DESIGN GUIDE LINES
Google already did the work of learning how is the best way to interact and show things to the users in the most of cases.
Take advantage of that!
APPLY THE MATERIAL THEME
To apply the material theme in your app, specify a style that inherits from android:Theme.Material
USE CARDS
CardView lets you show pieces of information inside cards with a consistent look across apps.
USE LISTS WITH BEST PERFORMANCE
RecyclerView is a more pluggable version of ListView that supports different layout types and provides performance improvements.
USE ANIMATIONS
Android 5.0 (API level 21) includes new APIs to create custom animations in your app in a more easiest way.
➤ Customize Touch Feedback ➤ Use the Reveal Effect ➤ Customize Activity Transitions ➤ Specify custom transitions and so on…
August/2015
August/2015
August/2015
MAINTAINING COMPATIBILITY
➤ Define and Provide Alternative Styles. ➤ Use the Support Library. ➤ Test your apps in many differents devices/android
versions. ➤ Knows what version supports which feature.
PERFORMANCE of users have uninstalled an app after a negative experience.90%
PREFER STATIC OVER INSTANCE METHODS
If you don't need to access an object's fields, make your method static.
Invocations will be about 15%-20% faster.
USE STATIC FINAL FOR CONSTANTS
The compiler will be more efficient if he know that variable will not be changed.
*Valid for primitives types and String
AVOID INTERNAL GETTERS/SETTERS
Inside a class you should always access fields directly. Leave getters/setters for public interface.
Doing it, could be from 3 to 7 times faster than invoking a trivial getter.
USE FOR-EACH LOOP SYNTAX
Use the for-each loop by default, but consider a hand-written counted loop for performance-critical ArrayList iteration.
CONSIDER PACKAGE ACCESS INSTEAD OFPRIVATE ACCESS WITH PRIVATE INNER CLASSES
Declare fields and methods accessed by inner classes to have package access, rather than private access.
AVOID USING FLOATING-POINT
As a rule of thumb, floating-point is about 2x slower than integer on Android-powered devices.
KNOW AND USE THE LIBRARIES
Do not reinvent the wheel. Know what native API can offer to you before implementing by yourself.
FEEDBACK is the time that the
most people have patience to wait a feedback from apps.
200ms
KEEPING YOUR APP RESPONSIVE
What Triggers ANR?
➤ No response to an input event (such as key press or screen touch events) within 5 seconds.
➤ A BroadcastReceiver hasn't finished executing within 10 seconds.
KEEPING YOUR APP RESPONSIVE
Network or database operations, or computationally expensive calculations such as resizing bitmaps should be done in a worker thread.
KEEPING YOUR APP RESPONSIVE
How to Avoid ANRs?
➤ Use AsyncTask. ➤ Do not NEVER! call Thread.wait()
or Thread.sleep(). ➤ Use IntentService for long process.
FEEDBACK TIPS - WORK IN BACKGROUND
If your application is doing work in the background in response to user input, show that progress is being made (such as with a ProgressBar in your UI).
FEEDBACK TIPS - HIGH CALCULATIONS
For games specifically, do calculations for moves in a worker thread.
SMARTPense em mobilidade. Lembre que seu app pode
aproveitar as principais características dos dispositivos móveis, como câmera e GPS.
USE MOBILE RESOURCES - GEOLOCATION
Do not ask where the user is. Instead, use Geolocation resources to discover that.
USE MOBILE RESOURCES - DEEPLINKS
If users are accessing your site in mobile, you must to turn possible open app with the same information, but with a better usage experience.
USE MOBILE RESOURCES - PERMISSIONS
Request only the necessary permissions! Otherwise, a more suspicious user can get scared and end up giving up performing the installation.
MEÇA! MEÇA! MEÇA!É importante coletar e avaliar algumas
informações importantes como: tempo entre os acessos, acessos por dia, tempo de
permanência, uso das funcionalidades, etc.
Houston temos um problema!
“Não se pode melhorar aquilo que não se pode medir!
MÉTRICAS DE USO
MÉTRICAS DE CRASH’S E ERROS E PERFORMANCE
“O “app perfeito” não deve ser visto necessariamente como um destino, mas sim como uma jornada.
Obrigada!
Sudeste
github.com/suelengc
Dúvidas?
Sudeste
github.com/suelengc
REFERÊNCIAS➤ http://m.corporate.canaltech.com.br/noticia/apps/Desempenho-um-diferencial-competitivo-para-apps/ ➤ http://exame.abril.com.br/tecnologia/noticias/especialista-do-google-da-dicas-para-o-desenvolvimento-de-um-app-de-
sucesso ➤ http://developer.android.com/intl/pt-br/training/material/compatibility.html#CheckVersion
➤ http://developer.android.com/intl/pt-br/training/articles/perf-anr.html#Avoiding ➤ http://developer.android.com/intl/pt-br/tools/debugging/systrace.html ➤ http://developer.android.com/intl/pt-br/tools/debugging/debugging-tracing.html
➤ http://developer.android.com/intl/pt-br/training/articles/memory.html ➤ http://developer.android.com/intl/pt-br/training/articles/perf-tips.html
➤ http://www.statista.com/statistics/266210/number-of-available-applications-in-the-google-play-store/
➤ http://www.statista.com/statistics/263795/number-of-available-apps-in-the-apple-app-store/ ➤ http://www.tecmundo.com.br/sistema-operacional/60596-ios-android-windows-phone-numeros-gigantes-comparados-
infografico.htm
➤ http://tnh1.ne10.uol.com.br/noticia/tecnologia/2015/05/04/322692/como-criar-um-aplicativo-de-sucesso-e-fidelizar-usuarios
➤ http://www.totalcross.com/blog/por-que-o-design-e-importante-para-o-sucesso-do-seu-aplicativo/ ➤ http://www.rankmyapp.com.br/blog/fatores-essenciais-de-um-app-de-sucesso/
➤ http://opensignal.com/reports/2015/08/android-fragmentation/
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