January 2012
Intermediate to advanced
282 pages
7h 4m
English
Content preview from Pro Android Apps Performance Optimization
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
Start your free trial
APIs
Android defines several APIs you can use to learn about how much memory is available on the system and how much is being used:
- ActivityManager'sgetMemoryInfo()
- ActivityManager'sgetMemoryClass()
- ActivityManager'sgetLargeMemoryClass()
- Debug's dumpHprofData()
- Debug's getMemoryInfo()
- Debug's getNativeHeapAllocatedSize()
- Debug's getNativeHeapSize()
TIP: Set android:largeHeap to true in your application's manifest file to use a large heap. This attribute was introduced in Android 3.0. Note that there is no guarantee the large heap is any larger than the regular heap. You should try hard to prevent your application from having to depend on this setting.
Listing 4–21 shows how to use the two getMemoryInfo() methods.
Listing 4–21. Calling