Question

For some Activity I’m using @Theme/Dialog, but this appears like old UI 2.3.
If I set the Theme of the Activity in the Manifest as Holo/Dialog, then this work fine, but of course this will not work with older devices.

How to force Holo Theme when available?

I tried with a custom MyTheme, but all the activity that have @android:style/Theme.Dialog, continue to appear like old theme.

My activity look like below:

 <activity
        android:name=".audio.TempoManager"
        android:label="Tempo Manager"
        android:theme="@android:style/Theme.Dialog" />

if I change it to @android:style/Theme.Holo.Dialog then on old device the activities will not be open as dialog but as simple activity.

Answer 1

refer to this blog post. it answers your question: holo-everywhere

mainly:
1. you write a theme.xml file defining a MyTheme in res/values/ for all pre-3.0 android versions.
2. write a themes.xml file defining the MyTheme in res/values-v11/ for 3.0+ android versions.
3. in the AndroidManifest.xml define the application theme to be MyTheme.

the first theme inherits from @android:style/Theme.
the second theme inherits from @android:style/Theme.Holo.