android- 关于屏幕适应摘抄

一、

drawable-hdpi

drawable-mdpi
drawable-ldpi
drawable-xhdpi
drawable-xxhdpi

一般来说，ldpi是120，mdpi是160，hdpi是240，xhdpi的dip是320，xxhdpi的是480。
xhdpi是Android 2.2才开始增加的分类；xlarge是Android 2.3才开始增加的分类; tvdip 则是最近的事。
此外
drawable-hdpi 对应的解析度为 WVGA (480x800),FWVGA (480x854)，是放高解析度的图片
drawable-mdpi 对应的解析度为 HVGA (320x480)，是放中等解析度的图片

drawable-ldpi 对应的解析度为 QVGA (240x320)，是放低解析度的图片

二、

values-v11和values-v14文件夹
values-v11代表在API 11+的设备上，用该目录下的styles.xml代替res/values/styles.xml
values-v14代表在API 14+的设备上，用该目录下的styles.xml代替res/values/styles.xml
其中API 11+代表android 3.0 +
其中API 14+代表android 4.0 +

三、

Android平台划分几个的实际支持的屏幕尺寸和分辨率范围
4个通用尺寸: 
small: 至少 426dp x 320dp (Android does not currently support screens smaller than this.)
normal: 至少 470dp x 320dp
large: 至少 640dp x 480dp
xlarge: 至少 960dp x 720dp -- Android 2.3 (API Level 9)
Create folders namely as given below :
res/layout-small : Devices with screens having at least a resolution of 426dp x 320dp will make use the layouts defined in this folder
res/layout-normal : Devices with screens having at least a resolution of 470dp x 320dp will make use the layouts defined in this folder
res/layout-large : Devices with screens having at least a resolution of 640dp x 480dp will make use the layouts defined in this folder
res/layout-xlarge : Devices with screens having at least a resolution of 960dp x 720dp will make use the layouts defined in this folder
res/layout-sw320dp : Devices with a smallest screen width which is greater than 320dp will make use the layouts defined in this folder
res/layout-sw480dp: Devices with a smallest screen width which is greater than 480dp will make use the layouts defined in this folder

四、

如果需要为Android pad定制资源文件，则res目录下的目录可能为：
drawable
drawable-ldpi
drawable-mdpi
drawable-hdpi
drawable-xhdpi
drawable-nodpi
drawable-nodpi-1024×600
drawable-nodpi-1280×800
drawable-nodpi-800×480
values
values-ldpi
values-mdpi
values-hdpi
values-xhdpi
values-nodpi
values-nodpi-1024×600
values-nodpi-1280×800
values-nodpi-800×480

http://www.360doc.com/content/12/0301/17/5087210_190881395.shtml
http://blog.csdn.net/woshicaixianfeng/article/details/6927155