By Mike Wolfson

Android improvement will be hard, yet during the powerful use of Android Developer instruments (ADT), you can also make the method more straightforward and enhance the standard of your code. This concise advisor demonstrates easy methods to construct apps with ADT for a tool family members that includes a number of monitor sizes, assorted services, and a various variety of resources.

With examples in home windows, Linux, and Mac OS X, you’ll how one can manage an Android improvement atmosphere and use ADT with the Eclipse IDE. additionally, contributor Donn Felker introduces Android Studio, a Google IDE that would finally change Eclipse.
• how to use Eclipse and ADT jointly to increase Android code
• Create emulators of varied sizes and configurations to check your code
• grasp Eclipse instruments, or discover the hot Android Studio
• Use Logcat, Lint, and different ADT instruments to check and debug your code
• Simulate real-world occasions, together with place, sensors, and telephony
• Create dynamic and effective UIs, utilizing Graphical structure instruments
• computer screen and optimize you program functionality utilizing DDMS, HierarchyViewer, and the Android visual display unit instrument
• Use Wizards and shortcuts to generate code and photograph resources
• collect and package deal Android code with Ant and Gradle

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Extra resources for Android Developer Tools Essentials: Android Studio to Zipalign

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If you haven’t done this already, review “Creating AVDs” on page 28 to do it. When you start your emulator, the options for snapshots will be enabled. The first time you start your emulator, you should select the “Wipe user data” and “Save to snapshot” options (as shown in Figure 4-3). This starts the emulator with a brand new image, and allows you to save your state when you close it down. Once you have these checkmarks selected, you can press the Launch button to start the emulator. Depending on the speed of your hardware, this can take a long time (anywhere from 90 seconds to many mi‐ nutes).

If there is no snapshot in memory, this option is not enabled. Save to snapshot Triggers the system to save a snapshot of the current state of the emulator when you close it. I use snapshots as a way to save a clean emulator that I can recover quickly. I save a snapshot the first time I start the emulator, right af‐ ter it has completed the boot sequence. From that point forward, I make sure I don’t check the “Save Snapshot” box. If I need a clean emulator image, I can just restart this emulator and thanks to snap‐ shots, I will have a fully booted clean emulator ready to go.

AVD Manager tool You are then presented with a secondary screen (Figure 4-2) that has a variety of options specific to running an emulator instance. 40 | Chapter 4: Using Devices and Emulators Figure 4-2. AVD launch options AVD launch options It is important to understand the launch options, and what they do. Using them allows you to change the size, performance, and data of your emulator. Scale factor This allows you to adjust the size of the emulator on your computer screen. To specify a particular screen size, place a checkmark in the Scale Factor box.

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