Displaying activity with custom animation

问题:

I have a widget which starts an activity when it is clicked. I'd like to have some kind of fancy animation to display this activity, rather than the standard scroll-from-right of Android. I'm having problems setting it, though. This is what I have:

slide_top_to_bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/accelerate_interpolator">
    <translate android:fromYDelta="-100%" android:toXDelta="0" android:duration="100" />
    <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="50" />
</set>

...which is referenced in anim.xml

<?xml version="1.0" encoding="utf-8"?>
<layoutAnimation xmlns:android="http://schemas.android.com/apk/res/android"
        android:delay="50%"
        android:animation="@anim/slide_top_to_bottom" />

But then where do I reference it from? I've tried both the base element of the activity I want to slide in, and the activitiy's entry in the manifest, both times with

android:layoutAnimation="@+anim/anim"

I might be doing this all wrong. Any help is much appreciated!

回答1:

You can create a custom Theme with a reference to your own animation and apply it to your Activity in your manifest file. I was successful in applying a custom animation for a floating window using the following style definition. You might be able to do something similar if you set the parent of your style to be "@android:style/Animation.Activity"

Look at the following files for further details on what you can override.

https://github.com/android/platform_frameworks_base/blob/master/core/res/res/values/styles.xml https://github.com/android/platform_frameworks_base/blob/master/core/res/res/values/themes.xml

Here's my a portion of my styles.xml and manifest.xml

styles.xml

<style name="MyTheme" parent="@android:style/Theme.Panel">
    <item name="android:windowNoTitle">true</item>
    <item name="android:backgroundDimEnabled">true</item>
    <item name="android:windowAnimationStyle">@style/MyAnimation.Window</item>
</style>

<!-- Animations --> 
<style name="MyAnimation" /> 

<!-- Animations for a non-full-screen window or activity. --> 
<style name="MyAnimation.Window" parent="@android:style/Animation.Dialog"> 
    <item name="android:windowEnterAnimation">@anim/grow_from_middle</item>
    <item name="android:windowExitAnimation">@anim/shrink_to_middle</item>
</style> 

Manifest.xml

    <activity
        android:name="com.me.activity.MyActivity"
        android:label="@string/display_name"
        android:theme="@style/MyTheme">
    </activity>

回答2:

startActivity(intent);
overridePendingTransition(R.anim.slide_top_to_bottom, R.anim.hold);

Check this link: overridePendingTransition method

Edit:

To Achieve the Animation for the Views. You have use the startAnimation Method like below

view.startAnimation(AnimationUtils.loadAnimation(
                 WidgetActivity.this,R.anim.slide_top_to_bottom));

Check this link:

回答3:

It doesn't matter that your starting from a widget, wrote a tutorial so that you can animate your activity's in and out. This animation is set within the activity that your bringing into focus so you can do it with pendingIntent as well.

Enjoy:

http://blog.blundellapps.co.uk/animate-an-activity/