Inside res/style.xml<style name="AppTheme" parent="android:Theme.Light" /><style name="PauseDialog" parent="@android:style/Theme.Dialog">    <item name="android:windowAnimationStyle">@style/PauseDialogAnimation</item></style><style name="PauseDialogAnimation">    <item name="android:windowEnterAnimation">@anim/fadein</item>    <item name="android:windowExitAnimation">@anim/fadeout</item></style>Inside anim/fadein.xml<alpha xmlns:android="http://schemas.android.com/apk/res/android"    android:interpolator="@android:anim/accelerate_interpolator"    android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="500" />

Inside anim/fadeut.xml<alpha xmlns:android="http://schemas.android.com/apk/res/android"    android:interpolator="@android:anim/anticipate_interpolator"    android:fromAlpha="1.0" android:toAlpha="0.0" android:duration="500" />MainActivityDialog imageDiaglog= new Dialog(MainActivity.this,R.style.PauseDialog);

<?xml version="1.0" encoding="utf-8"?><resources>    <style name="PauseDialog" parent="@android:style/Theme.Dialog">        <item name="android:windowAnimationStyle">@style/PauseDialogAnimation</item>    </style>    <style name="PauseDialogAnimation">        <item name="android:windowEnterAnimation">@anim/spin_in</item>        <item name="android:windowExitAnimation">@android:anim/slide_out_right</item>    </style></resources>

The windowEnterAnimation is one of my animations and is located in res\anim. The windowExitAnimation is one of the animations that is part of the Android SDK.Then when I create the Dialog in my activities onCreateDialog(int id) method I do the following.Dialog dialog = new Dialog(this, R.style.PauseDialog);// Setting the title and layout for the dialogdialog.setTitle(R.string.pause_menu_label);dialog.setContentView(R.layout.pause_menu);Alternatively you could set the animations the following way instead of using the Dialog constructor that takes a theme.Dialog dialog = new Dialog(this);dialog.getWindow().getAttributes().windowAnimations = R.style.PauseDialogAnimation;