The steps performed so far have installed Java, the Android Studio IDE and the current set of default Android SDK packages. Before proceeding, it is worth taking some time to verify which packages are installed and to install any missing or updated packages. This task can be performed using the Android SDK Settings screen, which may be launched from within the Android Studio tool by selecting the Configure -> SDK Manager option from within the Android Studio welcome dialog.
Once invoked, the Android SDK screen of the default settings dialog will appear as shown in Figure 2-5: Figure 2-5 Immediately after installing Android Studio for the first time it is likely that only the latest version of the Android SDK has been installed. To install older versions of the Android SDK simply select the checkboxes corresponding to the versions and click on the Apply button.
It is also possible that updates will be listed as being available for the latest SDK. To access detailed information about the packages that are available for update, enable the Show Package Details option located in the lower right hand corner of the screen. This will display information similar to that shown in Figure 2-6:
Figure 2-6 The above figure highlights the availability of an update. To install the updates, enable the checkbox to the left of the item name and click on the Apply button. In addition to the Android SDK packages, a number of tools are also installed for building Android applications. To view the currently installed packages and check for updates, remain within the SDK settings screen and select the SDK Tools tab as shown in Figure 2- 7
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