This step is done to avoid blocking the main UI thread.

这一步是为了避免阻塞主ui线程。

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Figure 1 shows the main UI of our Hello World application.

图1显示的是Hello World应用程序的主ui。

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Listing 2 shows the XML UI declarations for the main UI screen layout.

清单2展示了主ui屏幕布局的XML UI声明。

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Plus, it's contextually aware, meaning that controls change automatically depending upon the game or whether you are navigating the main UI.

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Not much is different on the Discover, with the exception of a new toggle switch on the main UI, which makes it pretty easy to go back and forth between the two modes.

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The UI's main menu has four categories: Phone (call log, contacts and profiles), Diary (email, calendar and messaging), Media (music, video, photos, camera and file manager) and Apps (with seven customizable shortcuts).

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