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Consejos y Secretos de Programación Android
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Sebastian Delmont
June 26, 2012
Programming
3
190
Consejos y Secretos de Programación Android
Campus Party México 2011
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Sebastian Delmont
June 26, 2012
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Transcript
Consejos y Secretos de Programación Android +Sebastian Delmont @sd Campus
Party Mexico 2011 Wednesday, July 20, 2011
¿Sebastian Quién? Swift, HootSuite, Gilt, GroupMe, StreetEasy Wednesday, July 20,
2011
1: Recursos Online • d.android.com Articulos, Referencia • stackoverflow.com tag
[android] • github.com/android Ejemplos: Camera App, LinearLayout Wednesday, July 20, 2011
2: Librerías • Android Compatibility Package • Larga lista de
librerías • AppMonk, DroidKit Wednesday, July 20, 2011
3: Eclipse • Optimizar eclipse.ini • Atajos de teclado Search
References - ⇧⌘ G Open Declaration - F3 Quick Outline - ⌘ O Quick Access - ⌘ 3 Open Type - ⇧⌘ T Run Last Launched - ⇧⌘ F11 Wednesday, July 20, 2011
4: ADT • DDMS • Hierarchy Viewer • 9-patch editor
Wednesday, July 20, 2011
5: Desfragmentando • 2.1: 18% 2.2: 60% 2.3: 18% Resto:
4% • 2.1➙2.2: Push, Respaldo, OpenGL • 2.2➙2.3: Audio • 2.3➙3.0: Fragments • Compatibility Package • FragmentationManager Wednesday, July 20, 2011
6: Modelo de Threads • Thread principal (UI) • DNR
• Rendimiento • AsyncTask • Intents y Servicios Wednesday, July 20, 2011
7: Archivos • Interno vs Externo • /sdcard/Android/data • .nomedia
• getExternalFilesDir() 2.2+ Wednesday, July 20, 2011
8: Configuraciones • configChanges ”orientation|keyboardHidden” • onCreate() / onResume() onPause()
/ onStop() • onRetainNonConfigurationInstance() getLastNonConfigurationInstance() Wednesday, July 20, 2011
8: Configuraciones • Preservando el Scroll view = listView.getChildAt() id
= list.getIdForView(view) offset = view.getTop() • Restaurando el Scroll pos = list.getPositionFor(id) listView.setSelectionFromTop(pos, offset) Wednesday, July 20, 2011
9: Imágenes en listas Wednesday, July 20, 2011
9: Imágenes en listas Directo de red Wednesday, July 20,
2011
9: Imágenes en listas Con caché en disco Wednesday, July
20, 2011
9: Imágenes en listas Con caché en disco y caché
en memoria Wednesday, July 20, 2011
9: Imágenes en listas Durante un fling Wednesday, July 20,
2011
9: Imágenes en listas Después del fling Wednesday, July 20,
2011
9: Imágenes en listas Recordar la imagen por omisión Wednesday,
July 20, 2011
10: Layout a la medida • onMeasure • onLayout •
LayoutParams Wednesday, July 20, 2011
11: Tips rápidos • ¿Objetos serializados? HEREJÍA!!! • Layouts anidados
• TextView: Drawables y Spannables • String.format(“%2$d %1$s”, n, x) • Clase Global Wednesday, July 20, 2011
¿Preguntas? +Sebastian Delmont @sd Wednesday, July 20, 2011