Android 操作栏图标大小
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Action Bar icon size
提问by Giorgi
According to Action Bar Iconsaction bar icon for the mdpi screen should be 24 x 24 px but the icons in Action Bar Icon Packfor mdpi are 32 x 32 px. The sizes do not match for other screen sizes neither. So which one is correct and what dimensions should the action bar icon have?
根据操作栏图标的屏幕MDPI动作栏图标应为24×24像素，但在图标的操作栏图标包适用于mdpi是32×32像素。尺寸与其他屏幕尺寸也不匹配。那么哪个是正确的，操作栏图标应该有什么尺寸？
采纳答案by Alex Curran
UPDATE: this answer is no longer valid, see the below answer for more up-to-date guidelines.
更新：此答案不再有效，有关更多最新指南，请参阅以下答案。
I believe they have to be 32x32dp, but the actual image itself should be 24dpx24dp centred. The Android design website has the correct guidelines.
我相信它们必须是 32x32dp，但实际图像本身应该以 24dpx24dp 为中心。Android 设计网站有正确的指南。
I've submitted a bug reportabout this but have yet to hear anything...
我已经提交了关于此的错误报告，但还没有听到任何消息......
回答by wangqi060934
-------update 2015.10.17--------
-------更新2015.10.17--------
The new google design gidelinesays:"System icons are displayed at 24dp","Icon content is limited to the 20 x 20dp live area, with 4px of trim around the perimeter".Like:
新的 google design gideline说：“系统图标以 24dp 显示”，“图标内容仅限于 20 x 20dp 的活动区域，周边有 4px 的修剪”。如：
------old-------
- - - 老的 - - - -
Full asset, 32x32 dp; Optical square, 24x24 dp
回答by OneWorld
I've conducted more testing with AppCompat ActionBar. I found out, that the ActionBar takes care for itself to enforce the minimum 48dp touch target size. I also found out, that the AppCompat ActionBar still expects action bar icons with a 32dp square size.
我已经使用 AppCompat ActionBar 进行了更多测试。我发现，ActionBar 会自行执行最小 48dp 触摸目标尺寸。我还发现，AppCompat ActionBar 仍然需要 32dp 正方形大小的操作栏图标。
Even with Material design, icons still have to follow rule "Full asset: 32x32 dp; Optical square: 24x24 dp" to have the correct size along with other icons in the action baras this figure (from wangqi060934's anwer) shows:
即使使用 Material design，图标仍然必须遵循“Full asset: 32x32 dp; Optical square: 24x24 dp”的规则才能与操作栏中的其他图标一起具有正确的大小，如下图（来自 wangqi060934 的答案）所示：
My previous assumption (see figures below) that the full asset size expanded from 32dp to 48dp is not correct.The 48dp are talking about the touch area. The confusion was caused by the revised Material Icon Spec documentwhich is linked in the much older ActionBar document.
我之前的假设（见下图）认为完整资产大小从 32dp 扩展到 48dp 是不正确的。48dp 正在谈论触摸区域。混乱是由修订的Material Icon Spec 文档引起的，该文档链接在更旧的ActionBar 文档中。
from https://www.google.com/design/spec/style/icons.html#icons-system-icons
来自https://www.google.com/design/spec/style/icons.html#icons-system-icons
from http://www.google.com/design/spec/layout/metrics-keylines.html#metrics-keylines-sizing-by-increments
来自http://www.google.com/design/spec/layout/metrics-keylines.html#metrics-keylines-sizing-by-increments
回答by CarLoOSX
Use Android Studio Image Asset
使用 Android Studio 图像资源
Go to:
去：
- Project>res --> right click
- new> image asset --> Icon type: Action Bar and Tab Icons
- next>Finish.
- 项目>资源->右键单击
- 新建> 图像资产 --> 图标类型：操作栏和选项卡图标
- 下一个>完成。
Now you will have your icon in the correct resolutions.
现在您将拥有正确分辨率的图标。
回答by Radoslav
The finished action bar icon dimensions as shown in the link below should be. https://developer.android.com/guide/practices/ui_guidelines/icon_design_action_bar.html
完成后的操作栏图标尺寸应如下面的链接所示。 https://developer.android.com/guide/practices/ui_guidelines/icon_design_action_bar.html
Low density screen
低密度屏
ldpi (120 dpi) --> 18 x 18 px
Medium density screen
中密度屏
mdpi (160 dpi) --> 24 x 24 px
High density screen
高密度屏
hdpi (240 dpi) --> 36 x 36 px
Extra-high density screen
超高密度屏
xhdpi (320 dpi) --> 48 x 48 px
XX-high density screen
XX-高密度屏
xxhdpi (480 dpi) --> 72 x 72 px
XXX-high density screen
XXX-高密度屏
xxxhdpi (640 dpi) --> 96 x 96 px
