Download logcat android studio

To reduce the log output to a manageable level, you can restrict log output using filter expressions. Filter expressions let you indicate to the system the tags-priority combinations that you are interested in — the system suppresses other messages for the specified tags.

A filter expression follows this format tag:priority Messages for that tag at or above the specified priority are written to the log. You can supply any number of tag:priority specifications in a single filter expression.

The series of specifications is whitespace-delimited. Here's an example of a filter expression that suppresses all log messages except those with the tag "ActivityManager", at priority "Info" or above, and all log messages with tag "MyApp", with priority "Debug" or above:. The following filter expression displays all log messages with priority level "warning" and higher, on all tags:. Log messages contain a number of metadata fields, in addition to the tag and priority. You can modify the output format for messages so that they display a specific metadata field.

To do so, you use the -v option and specify one of the supported output formats listed below. When starting logcat, you can specify the output format you want by using the -v option:. Here's an example that shows how to generate messages in thread output format:. Note that you can only specify one output format with the -v option, but you can specify as many modifiers that make sense. Logcat ignores modifiers that do not make sense.

Format modifiers change the logcat output in terms of any combination of one or more of the following modifiers. To specify a format modifier, use the -v option, as follows:. Every Android log message has a tag and a priority associated with it. You can combine any format modifier with any one of the following format options: brief , long , process , raw , tag , thread , threadtime , and time.

You can get the format modifier details by typing logcat -v --help at the command line. The Android logging system keeps multiple circular buffers for log messages, and not all of the log messages are sent to the default circular buffer. To see additional log messages, you can run the logcat command with the -b option, to request viewing of an alternate circular buffer.

You can view any of these alternate buffers:. You can also specify multiple -b flags for all of the buffers you want to print, as follows:. You can specify a single -b flag with a comma-separated list of buffers, for example:. The Log class allows you to create log entries in your code that display in the logcat tool. Common logging methods include:.

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Melihat log aplikasi Anda Untuk menampilkan pesan log sebuah aplikasi: Build dan jalankan aplikasi Anda di perangkat. Gambar 1. Jendela Logcat Secara default, logcat hanya menampilkan pesan log untuk aplikasi yang sedang berjalan di perangkat. Toolbar Logcat menyediakan tombol-tombol berikut: Clear logcat : Klik untuk menghapus log yang terlihat. Scroll to the end : Klik untuk melompat ke bagian bawah log dan melihat pesan log terbaru.

Jika Anda kemudian mengklik sebuah baris dalam log, tampilan akan menjeda scroll pada titik itu. Up the stack trace dan Down the stack trace : Klik untuk menavigasi pelacakan tumpukan naik dan turun dalam log, yang akan memilih nama file berikutnya dan melihat nomor baris terkaitnya di editor yang muncul dalam pengecualian tercetak.

Perilaku ini sama dengan ketika Anda mengklik nama file dalam log. Use soft wraps : Klik untuk mengaktifkan penggabungan baris dan mencegah scrolling horizontal tetapi string yang tidak dapat dipecah tetap memerlukan scrolling horizontal. Print : Klik untuk mencetak pesan logcat. Setelah memilih preferensi cetak dalam dialog yang ditampilkan, Anda juga dapat memilih untuk menyimpannya ke PDF. Restart : Klik untuk menghapus log dan memulai ulang logcat.

The tag of a system log message is a short string indicating the system component from which the message originates for example, ActivityManager. Your tag can be any string that you find helpful, such as the name of the current class. A good convention is to declare a TAG constant in your class to use in the first parameter.

For example, you might create an information log message as follows:. Note: Tag names greater than 23 characters are truncated in the logcat output. Every Android log message has a tag and a priority associated with it. A user-defined tag can be any string that you find helpful, such as the name of the current class the recommended tag.

You define it in a Log method call, for example:. For example, the following log message has a priority of V and a tag of AuthZen :. You can control how many messages appear in logcat by setting the log level. You can display all messages, or just the messages indicating the most severe conditions. Remember that logcat continues to collect all messages regardless of the log level setting.

The setting just determines what logcat displays. Debug: Show debug log messages that are useful during development only, as well as the message levels lower in this list. Info: Show expected log messages for regular usage, as well as the message levels lower in this list. Warn: Show possible issues that are not yet errors, as well as the message levels lower in this list. Error: Show issues that have caused errors, as well as the message level lower in this list.

Assert: Show issues that the developer expects should never happen. Note: The filter applies to your full logcat history, not just those messages currently displayed in logcat. Make sure your other display options are set appropriately so you can see the filter output you want to examine. After you define filters, you can also select them in the menu. To remove them from the menu, delete them.