Android修改屏幕密度

diff --git a/device/rockchip/rk3288/system.prop b/device/rockchip/rk3288/system.prop
index efeb5d3..0c288a8 100644
--- a/device/rockchip/rk3288/system.prop
+++ b/device/rockchip/rk3288/system.prop
@@ -42,7 +42,7 @@ wifi.supplicant_scan_interval=15
 ro.factory.tool=0
 ro.kernel.android.checkjni=0
 #set default lcd density to Rockchip tablet
-ro.sf.lcd_density=320
+ro.sf.lcd_density=160
 ro.adb.secure=0
 ro.same.orientation=true
 ro.orientation.einit=0