U

Uniform Resource Identifier (URI), 193 unregisterListener() method, 169 updatePeriodMillis parameter, 241 Updates, widget, 239-241 Updating published applications, 275 Uri class, 135

Widgets

UriMatcher class, 196 User ID, 127

User interface design, 43-72 About box, 57-62 debugging, 69-71 device-specific UI, 267 exit button, 71 menus, 64-65

multi-touch features, 220-232 new game button, 67-69 opening screen, 45-54 screen layouts, 55-57 settings, 66, 67 Sudoku overview, 43, 45 themes, 61-63 types of, 44-45 uses-library tag, 174 uses-permission tag, 139, 148

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