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The Android Log Viewer is an integrated plugin that launches automatically when it has detected that you've launched a debugging session.
After installation of the Android Log Viewer, it'll launch automatically when debugging an Android application within the IDE. It'll only show log messages exclusive to your application, so that you don't have to deal with debug messages from other applications. Once your debugging session ends, logging will stop.
In the screen shot below, you'll see that the viewer has attached to the other diagnostic and tool windows at the bottom.
If Android support is not detected, you'll see a message showing up in the IDE's output window.