July 2014
Intermediate to advanced
248 pages
5h 19m
Chinese
Content preview from Android Developer Tools深入精要
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第七章：測試程式碼
預先定義的輸出格式
日誌訊息包括多種中繼資料（
metadata
）欄位，例如層級（
level
）、時間、處理程序
ID
、應用程式、標籤以及該錯誤訊息。為了顯示這些特定的中繼資料，可以指定多種
預先定義的輸出格式。這可以使用
-v
參數，以及其中一個預先定義的輸出格式來完成。
brief
（簡短的）
顯示標籤，以及處理程序的
PID
。
raw
（原始）
顯示原始的日誌訊息，不包含其他中繼資料。
time
（時間）
顯示日期、時間資訊、標籤以及
PID
。
long
（冗長）
顯示全部的中繼資料，並且在訊息間插入空行。
例如，要將資料依時間格式輸出，可執行：
adb logcat -v time
Eclipse
中的
logcat
檢視器
在
Eclipse
標準的
Java
視圖（
perspectives
）裡，你會在螢幕的下方分頁群中（圖
7-1
）
發現
logcat
分頁（ ）；這工具可以瀏覽當前已連接裝置的
logcat
，且使用額外的
UI
輔助。
[Page-94]
日誌裡可能會有很多來自系統的日誌干擾，你可以新增一個排它過濾器（
exclusion
filter
）來過濾掉常見的系統訊息讓檢視更容易；新增過濾器的步驟如下：
1.
點選加號圖案（
）來新增。
2.
指定一個「過濾器名稱」（
Filter Name
）。
3.
在「依日誌標籤」（
by Log Tag
）欄位中輸入過濾器內容：
^(?!excludeterm1|excludeterm2|excludeterm3).*$
。
4.
我用這個過濾器作為一個好的出發點： ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.