The new Logcat is enabled in the new version of Android Studio. Here are some tips:
Article directory
1. Logcat starts
The new logcat displays additional messages when the application starts or stops (shuts down or crashes). It will contain the new message, process ID, and package name.
2. Logcat search
Logcat provides a search bar with very rich search logic. Let’s talk about the content we use more:
1. Search the logs under the current package name:
package:mine
2. Add log level
There are 6 log levels in total, Log level: level:[ VERBOSE | INFO | ASSERT | DEBUG | WARN | ERROR ]. If I want to find logs >= INFO level:
package:mine level:info
3. Add tags
You need to find logs with specific tags, for example, you need to find logs containing the "info" field:
package:mine level:info tag:info
4. Label+Field
For example, the following log exists now:
Log.i("info","info tag one")
Log.i("info","info tag two")
Log.i("info","info tag three")
Now we need to query the logs with the " one " field:
package:mine level:info tag:info one
5. Exclude fields
For example, there are three logs:
Log.i("info","info tag one")
Log.i("info2","info tag two")
Log.i("info3","info tag three")
Now get " info " and need to exclude logs containing " info2 ":
package:mine level:info tag:info -tag:info2
6. Use regular expressions
If the following log exists:
Log.i("info","info tag one")
Log.i("info2","info tag two")
Log.i("info3","info tag three")
Need to obtain tag logs starting with " info ":
package:mine tag~:info*
7. Use regular expressions to exclude
If the following log exists:
Log.i("info","info tag one")
Log.i("info2","info tag two")
Log.i("info3","info tag three")
Need to get logs that do not end with " 2 ":
package:mine level:info -tag~:.*2
8. Use age to intercept time
age:30s returns the last 30 seconds of logs
age:2m returns the last 2 minutes of logs
age:1h returns the last hour of logs
age:2d returns the last 2 days of logs
package:mine age:10s
9. Query multiple keywords
For example, if I want to get the three keywords "aa", "bb" and "cc" at the same time, I need to use "|", similar to this:
package:mine aa | bb | cc
Tips: Note that keywords need to be separated by spaces !
3. Logcat Collection
Logcat will record the log commands you have written, which can be found in the history records:
For some commands you care about or like, add them to your favorites:
After collecting them, you can display them in the history list:
4. Logcat formatting
You can enter the " Standard View " by clicking the tool on the left side of Logcat: you can display the timestamp (date and time), process ID (including thread ID), label, package name, log level and message, etc., of course, it It also supports customized configuration. Just check what you want it to display:
enter " Compact View ", that is, when you enter Compact View, the timestamp (time), log level and message are displayed.
After the modification is completed, you can see our beautiful log output.
5. Support multi-window mode
The new version of Logcat supports multi-window operation mode, which is quite powerful. I personally find it very easy to use:
6. Summary
The basic commonly used functions have been mentioned once. Generally speaking, the new version of Logcat has some new functions compared to the old version of Logcat:
- Additional logs when the application starts, stops or crashes
- Multiple logcat tabs and windows allow users to analyze data from different devices simultaneously
- Formatting options for log entries can be adjusted and we can see filtered information
- Search and filter are merged into the always-visible query input field, additional filter operators are also included
- Most available queries can be saved as favorites and you have greater control over query history
That's basically it. If you have any questions while learning and using it, you can contact me wx: javainstalling, note: Logcat.