android 去掉activity的切换动画

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
        <item name="android:windowAnimationStyle">@style/Animation</item>
    </style>

    <style name="Animation">
        <item name="android:activityOpenEnterAnimation">@null</item>
        <item name="android:activityOpenExitAnimation">@null</item>
        <item name="android:activityCloseEnterAnimation">@null</item>
        <item name="android:activityCloseExitAnimation">@null</item>
        <item name="android:taskOpenEnterAnimation">@null</item>
        <item name="android:taskOpenExitAnimation">@null</item>
        <item name="android:taskCloseEnterAnimation">@null</item>
        <item name="android:taskCloseExitAnimation">@null</item>
        <item name="android:taskToFrontEnterAnimation">@null</item>
        <item name="android:taskToFrontExitAnimation">@null</item>
        <item name="android:taskToBackEnterAnimation">@null</item>
        <item name="android:taskToBackExitAnimation">@null</item>
    </style>

overridePendingTransition(0, 0);