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As noted before, it's great to test on your device, but sometimes an emulator is handier. If you haven't setup your Android emulator yet, please review Chapter 2's lesson Establishing an emulator. This lesson continues the work we've done in the previous two lessons of this chapter. The easiest way to view your work in an emulator, is if you're developing with ADT/Eclipse, as we are, and then to launch the emulator from within Eclipse. So I'm going to go up to Window > Andorid Virtual Device Manager, open that up, and there you see the emulator we created, Jelly_Bean, so I'll select that, and then click Start.
Now I'm going to deselect Launch from snapshot, so I can begin with a clean slate here, now I click Launch. So, let's go to Home, and then the App screen, and there is Jelly Bean One, in the second the last row on left, good job. Now, you can debug your App in both the device and the emulator.
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