Changes

The emulator probably defaulted to appearing full size and in landscape orientation. It is useful to be aware that these default options can be changed. Within the AVD Manager, select the new Nexus 9 entry and click on the pencil icon in the Actions column of the device row. In the configuration screen locate the Startup size and orientation section and change the Scale menu to 2dp on device = 1px on screen to reduce the size of the emulator on the screen. Exit and restart the emulator session to see this change take effect.

To save time in the next section of this chapter, leave the emulator running before proceeding.

By default, Android Studio will respond to the run request by displaying the Choose Device dialog. This provides the option to execute the application on an AVD instance that is already running, or to launch a new AVD session specifically for this application. Figure 5 5 lists the previously created Nexus 9 AVD as a running device as a result of the steps performed in the preceding section. With this device selected in the dialog, click on OK to install and run the application on the emulator.

[[Image:android_studio_device_choose_6.0.png]]

When building and running an application for testing purposes, each time a new revision of the application is compiled and run, the previous instance of the application running on the device or emulator will be terminated automatically and replaced with the new version. It is also possible, however, to manually stop a running application from within Android Studio.

To stop a running application, begin by displaying the Android Monitor tool window either using the window bar button, or via the quick access menu (invoked by moving the mouse pointer over the button in the left hand corner of the status bar as shown in Figure 5-10).

android delete avd –n <avd name>

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== Android Virtual Device Configuration Files ==

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