Tag 4: 12:00 - 13:00 - Android UI Development: Tips, Tricks, and Techniques

Von Chet Haase und Romain Guy

Mein zweiter Vortag zum Thema Android. In diesem Talk ging es eher um "do's and dont's". Es wurden die Themen "Garbage prevention", Tools

Wieder ein paar Zitaten aus dem Talk:

• "avoid object creation"
• "recycle bitmaps"
• "instead of myBitmap=null use myBitmap.recycle()"
• "dont wait for the finalizer"
• "be aggressive on deallocating objects"

Tools zum Thema Speichermanagement/-monitoring

• Tools Allocation Tracking
• Debug.startAllocationCounting()
• Heap-Analysis mit "hat" (vom Java Oracle SDK) mit hprof-converter
• MAT Memory-Analysis-Tool for Eclipse

Tools für Layouting

• HierarchieViewer
• LayoutOpt

Verhindern von "Memory Leaks"

• "careful with context"
• "care with static fields"
• "avoid non-stsatic inner classes"
• "use weak references"

Dont block the UI

• Single-threaded UI
• Dont block the UI-thread
• ANR* after 5 sec - dump on sd-card
• Handler posts messages in event-queues
• Use AsyncTask - they are WorkerThread with callbacks

* Application not responding

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