Android Studio - Dolphin | 2021.3.1 Canary 6 is now available in the Canary and Dev channels.
If you already have an Android Studio build on the Canary or Dev channel, you can get the update by clicking Help > Check for Update (or Android Studio > Check for Updates on macOS). Otherwise, you can download it here.
For information on new features and changes in all preview builds of Android Studio Dolphin, see the Android Studio Preview release notes. For details of bugs fixed in each preview release, see previous entries on this blog.
We greatly appreciate your bug reports, which help us to make Android Studio better. If you encounter a problem, let us know by reporting a bug. Note that you can also vote for an existing issue to indicate that it also affects you.
General fixes
New features
New Logcat
Logcat has been updated to make it easier to parse, query, and track logs. This represents the most significant update to the tool since its introduction, and we would appreciate early feedback to make sure we create the best experience for you.
New formatter
Logcat now formats logs to make it easier to scan useful information, such as tags and messages, and identify different types of logs, such as warnings and errors.
Create multiple Logcat windows
You can now create multiple tabs within Logcat, so that you can easily switch between different devices or queries. Right-clicking a tab allows you to rename it, and you can click and drag to rearrange the tabs.
Additionally, to help you more easily compare between two sets of logs, you can now split the view within a tab by right-clicking in the log view and selecting either Split Right or Split Down. To close a split, right-click and select Close. Each split allows you to set its own device connection, view options, and query.
Switch between view presets
Logcat now allows you to quickly switch between different view modes—Standard, Compact, and Custom—by clicking 
New key-value search
In the previous version of Logcat, you had the option to either use string search (with support for regular expressions) or create a new filter by populating various fields using the Logcat UI. The first option made search more complex and the second option made sharing and setting up queries more difficult. We’ve now simplified the experience by introducing key-value searches right from the main query field.
This new query system provides accurate query results, without relying on regular expressions, as well as the ability to recall past queries from history, and share those queries with others. Additionally, you still have the option to use regular expressions and exclude logs based on key-values. Here are some examples of how to use the new query system, but you can also simply start typing in the query field to see suggestions:
- PIDs for the local app project: package-mine
- Specific values:
- package:<my-package-ID>
- tag:<my-tag>
- level:[VERBOSE | INFO | ASSERT | DEBUG | WARN | ERROR]
- Exclude a specific value by preceding the key with -:
- -tag:<exclude-this-tag>
- Use the regular expressions with a given key by placing a ~ after the key:
- tag~:<regular-expression-tag>
- Combine with the exclude tag: -tag~:<exclude-this-regex-tag>
You can also see a history of queries by clicking 
Track logs across app crashes/restarts
The new Logcat now makes it easier to track logs from your app across app crashes and restarts, so that you don’t miss important logs across these events. When a Logcat notices that your app process has stopped and restarted you’ll see a message in the output—such as PROCESS ENDED and PROCESS STARTED—as shown below:
And, restarting Logcat preserves your session configuration, such as tab splits, filters, and view options, so that you can continue your session easily. We appreciate any feedback you might have with the new Logcat, which you can report here.
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