屏幕分辨率值

dpi对比表：

 Low density (120), ldpiMedium density (160), mdpiHigh density (240), hdpiExtra-high-density (320), xhdpiSmallscreenQVGA (240x320) 480x640 NormalscreenWQVGA400 (240x400) 
WQVGA432 (240x432)HVGA (320x480)WVGA800 (480x800) 
WVGA854 (480x854) 
600x1024640x960LargescreenWVGA800** (480x800) 
WVGA854** (480x854)WVGA800* (480x800) 
WVGA854* (480x854) 
600x1024  Extra-Largescreen1024x600WXGA (1280x800)^†
1024x768
1280x7681536x1152
1920x1152 
1920x12002048x1536
2560x1536 
2560x1600各个分辨率资源文件对应：