April 2014
Intermediate to advanced
260 pages
5h
Japanese
Content preview from 実践 Android Developer Tools
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41
4
章
デバイスとエミュレータの使い方
4.1
エミュレータの使い方
前章では、エミュレータの作り方を学んだ。この章ではその使い方に入る。エミュレータは、テス
トが楽になる非常に強力なツールで、実世界の条件のもとでは実現するのが難しいさまざまなことを
シミュレートできる。たとえば、地図アプリケーションを書いている場合、世界中の位置のテストが
必要になるかもしれないが、それらの場所にいちいち出かけていくのは非現実的だろう（きっととて
も面白いはずだが）。エミュレータなら、ネットワーク設定、ハードウェア/ソフトウェア設定、セン
サーイベントをシミュレートできる。実機がなくても、テストが必要な設定はすべて試せる。たとえば、
エミュレータを使えば、さまざまな画面サイズやメモリ設定を真似られる。この章では、エミュレー
タを使ってさまざまなパラメータを効果的にテストするための方法を説明する。
エミュレータと実機は、ほとんどの
場面でADTツールとまったく同じようにやり取りする。言い換
えれば、この章で取り上げる処理は、エミュレータでも実機とまったく同じように処理される。むしろ、
さまざまなオプション（ネットワーク設定など）がサービスプロバイダによって固定されている分、ほ
とんどの場合は実機の方が制限されている。
あなたは、テストを完全に済ませるために実機とエミュレータをさまざまに組み合わせて使うこと
になるだろう。テストでは、何台でも好きなだけ異なるエミュレータと実機を実行できる。もっとも、
設定によっては、個々のエミ
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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.