Android Resolution Problems

I build unity project to android platform with a customized android plugin. (Using Unity3.4)

Successfully Working, but occurred performance problems..

My tested device is Samsung Galaxy Nexus, which has HD resolution screen.

So, the game is too slow..

I try to solve this problem with the next way..

In AndroidManifest.xml

 <supports-screens 
     android:smallScreens="true" 
     android:normalScreens="true" 
     android:largeScreens="true"
     android:xlargeScreens="true" 
     android:anyDensity="false" />

anyDensity="false" -> It's work!

My game runs in low resolution screen, and the performance is good.

But, the other problem(or bug?) is occurred..

Another activities or views(ex: AlertDialog), created over the main unity activity,

are too small like the image!

This activity is rendered like the image, but works normally.

Touch areas are located in right positions.

I think It's only rendering problem..(maybe)

What's the solution to solve this problem?