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移动设备的背景图片尺寸问题

androidmobilescreen-resolution
6

我想在我的安卓应用中展示一张背景图片。
对于所有移动设备屏幕分辨率而言，理想的图片尺寸（宽度和高度）是多少？

2个回答
6

我认为最理想的做法是使用最高的屏幕密度，这样应用程序就会将其缩放到较低的屏幕分辨率，以便在更大的屏幕上不会失去质量。这是我从这里得到的图表：

xlarge screens are at least 960dp x 720dp
large screens are at least 640dp x 480dp
normal screens are at least 470dp x 320dp
small screens are at least 426dp x 320dp
Generalised Dpi values for screens:

ldpi Resources for low-density (ldpi) screens (~120dpi)
mdpi Resources for medium-density (mdpi) screens (~160dpi). (This is the baseline     density.)
hdpi Resources for high-density (hdpi) screens (~240dpi).
xhdpi Resources for extra high-density (xhdpi) screens (~320dpi).
Therefore generalised size of your resources (assuming they are full screen):

ldpi
Vertical = 426 * 120 / 160 = 319.5px
Horizontal = 320 * 120 / 160 = 240px
mdpi
Vertical = 470 * 160 / 160 = 470px
Horizontal = 320 * 160 / 160 = 320px
hdpi
Vertical = 640 * 240 / 160 = 960px
Horizontal = 480 * 240 / 160 = 720px
xhdpi
Vertical = 960 * 320 / 160 = 1920px
Horizontal = 720 * 320 / 160 = 1440px

px = dp*dpi/160
同时提醒一下，随着最近发布的Galaxy S4，您可能需要添加xxhdpi以支持更广泛的密度范围。 - Chor Wai Chun
1
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