New PDF release: Android Best Practices

By Godfrey Nolan

ISBN-10: 1430258578

ISBN-13: 9781430258575

Android top Practices by means of Godfrey Nolan indicates you ways to make your Android apps stand proud of the gang with superior experiences in your apps. Why accept simply making any Android app? construct an excellent, standout Android app as an alternative that shall we your clients compliment it for ease of use, greater functionality and extra. higher compliment capacity greater, greater placement within the app shops for elevated app revenues.

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MAT can help you make sense of the heap output. Now when you dump the heap profile or hprof file (see Figure 3-6), it will be automatically analyzed so you can make some sense of the heap file. CHAPTER 3: Performance 59 Figure 3-6. Dumping the hprof file MAT provides a number of reports, including a Dominator Tree for the biggest class, a Top Consumers report, and a Leak Suspects report. Figure 3-7 shows Biggest Objects by Retained Size. 60 CHAPTER 3: Performance Figure 3-7. Memory Analyzer Tool overview Memory Allocation The next level of detail about allocations is shown in the Allocation Tracker view (Figure 3-8).

But it also provides heap analysis, method allocation, and thread monitoring information. The Android SDK also has the Traceview tool for method profiling, layoutopt for optimizing your XML layouts, and Hierarchy Viewer for optimizing your UI. And because Android is basically a Linux shell, we can leverage many of the following command-line Unix tools for performance testing:  Top  Dumpsys  Vmstat  Procstats In this section we’re going to look at how to use those tools to get a quick idea of where your application is spending most of its time.

Figure 3-4. The System Performance tool displaying CPU load for CallCenterApp Heap Usage DDMS also offers a Heap Usage tool. Take the following steps to view the memory heap, where you can see what objects are being created and if they’re being destroyed correctly by the garbage collection. ) 1. In the Devices tab, select the process for which you want to view the heap. 2. Click the Update Heap button to enable heap information for the process. 3. Click Cause GC in the Heap tab to invoke garbage collection, which enables the collection of heap data.

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Android Best Practices by Godfrey Nolan


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