April 2014
Intermediate to advanced
260 pages
5h
Japanese
Content preview from 実践 Android Developer Tools
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7.1
LogCat
99
システムログファイルには、ノイズが多数含まれている。表示したくないシステ
ム情報を取り除く排除フィルタを作れば、作業が楽になる。フィルタを作るには、
次のようにする。
1.
プラス（ ）アイコンを選択して、新しいフィルタを作る。
2.
フィルタ名を指定する。
3.
「
by Log Tag
」セクションのフィルタ値を入力する
:
^(?!excludeterm1| excludeterm2|excludeterm3).*$
4.
私は、出発点として次のフィルタを使っている
:
^(?!dalvikvm| ActivityManager|SystemServer|BackupManagerService).*$
7.1.9
LogCat
の例
LogCatは、Androidの非常に強力な機能だが、共通ログに出力される情報が多いために、必要な
データを見つけにくいことがある。ほしい情報を見つけ、コードの出力の理解を深めるために、単純
な例に基づいて冗長なシステムログをフィルタリングする方法を具体的に見てみよう。
このサンプルのために、ユーザーからUSドルの額を入力してもらい、それをウェブ
サービスに送っ
て、ユーロ単位の値を返すコードを書いた。返された値は、最後にカスタムフォーマットのスタイル
に変換され、ユーザーインターフェイスに表示される。
7.1.9.1
監視するカテゴリを決める
ロギングするコードの特性について考えることは重要だ。ロジックを別々のカテゴリに分割してお
きたい（カ
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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.