I used <uses-sdk android:minSdkVersion="9" android:maxSdkVersion="15" /> but Theme.Holo doesnot work.
Android Manifest:
<activity android:name=".Login" android:label="@string/app_name" android:theme="@android:style/Theme.Holo.NoTitleBar.Fullscreen" android:screenOrientation="portrait">
Screenshot:

According to the documentation, the Theme you’re referencing doesn’t exist.
In this case, it’s called
Theme_Holo_NoActionBar_Fullscreen, notTheme_Holo_NoTitleBar_Fullscreen(ActionBar in Honeycomb is basically the same as a TitleBar pre-Honeycomb)By the way, do not let the underscores confuse you. In this documentation, when you see an underscore, you’re suppose to replace it with a dot
.Also, be sure to target the api level 11 or higher, or it won’t find it since this kind of theme was only introduced in Honeycomb.