Android Best Practices by Godfrey Nolan

By Godfrey Nolan

Android most sensible Practices by way of Godfrey Nolan indicates you ways to make your Android apps stick out from the gang with more advantageous experiences on your apps. Why accept simply making any Android app? construct a super, standout Android app as an alternative that we could your clients compliment it for ease of use, greater functionality and extra. greater compliment capacity higher, larger placement within the app shops for elevated app revenues.

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Java contains the injection map that tells the app whether to use the ToDoProvider stub file or the ToDoProvider2 file that connects to the database. java contains a currentChoice Boolean flag that tells the app whether to use the stub or the real connection. The ToDoModule Listing 2-16 shows how the ToDoModule wires in the two database providers; the first is the real database and the second is a stub function. Listing 2-16. TABLE_NAME + " (id integer primary key autoincrement, title text not null);"; private final Context appContext; public static boolean sourceToggle = false; private TodoApplication parent; /** Constructs this module with the application context.

Memory Analyzer Tool overview Memory Allocation The next level of detail about allocations is shown in the Allocation Tracker view (Figure 3-8). To display it, click Start Tracking, perform an action in the application, and then click Get Allocations. The list presented is in allocation order, with the most recent memory allocation displayed first. Highlighting it will give you a stack trace showing how that allocation was created. CHAPTER 3: Performance Figure 3-8. Allocation Tracker Threads The thread monitor and profiling view in DDMS is useful for applications that manage a lot of threads.

3. Click Cause GC in the Heap tab to invoke garbage collection, which enables the collection of heap data. 4. When garbage collection completes, you will see a group of object types and the memory that has been allocated for each type. 58 CHAPTER 3: Performance 5. Click an object type in the list to see a bar graph that shows the number of objects allocated for a particular memory size in bytes. 6. Click Cause GC again to refresh the data. Details of the heap are given along with a graph of allocation sizes for a particular allocation type.

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