change theme ? or just background

You need to apply one of available themes to your application. You can do itAndroidManifest.xml, just useandroid:themeattribute:

android:theme="@android :style/Theme.Holo"if you want dark theme orandroid:theme="@android :style/Theme.Holo.Light"if you want light theme.

If you use put this app in one of your<activity>tags, only corresponding activity will be styled, if you put it in<application>tag, style will be applied to the whole application.

Of course, you can define your own style instyles.xml:

<style name="AppTheme" parent="android:Theme.Light"> <item name="android:windowBackground">@drawable/bg_window</item> <item name="android:windowActionBar">false</item> <item name="android:windowNoTitle">true</item> </style>

Here's the example ofAndroidManifest.xml:

<application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name=".Activity1" android:theme="@style/AppTheme2" /> <activity android:name=".Activity2" />

In this example,AppTheme2will be applied only toActivity1, whileAppThemewill be applied to all other activities.

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