Logcat is an important part of everyday development. Its purpose is to display all logs coming from your device. It displays logs from an emulator or a live device connected. Android has several levels of log messages:
You can filter log messages by these log levels (for example, when you need to see only errors--application crash stacktrace) or log tag (we will explain this later); or by keyword, regex, or the application package. Before we apply any filter, we will configure Android Studio so the log messages are colored differently.
Choose Android Studio | Preferences. In the search field, enter Logcat. Logcat coloring preferences appears, as shown in the following screenshot: ...