移動設備的背景圖像大小

Question

我想在我的andriod應用程序中顯示背景圖像。
什麼是理想的圖像大小（寬度和高度），以適應移動的所有屏幕分辨率？

Answer 1

ID說，理想的是使用最高的屏幕密度，因此應用程序將其縮小爲較低的屏幕分辨率這樣你不會鬆動質量上更大的屏幕，繼承人我下車這裏

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 

Answer 2

圖表

請參考以下鏈接..

• Support multiple screens
• Best practise
• testing for multiple screens

這與@JRowan答案將引導您正確的方向沿..