[Android] Animation

1. Docs
1. Animation Basic
   http://developer.android.com/guide/topics/resources/animation-resource.html
2. Property Animation
   
   • http://developer.android.com/guide/topics/resources/animation-resource.html#Property
   • http://developer.android.com/guide/topics/graphics/animation.html
     
3. Tween Animation - View Animation
   • http://developer.android.com/guide/topics/resources/animation-resource.html#Tween
   • http://developer.android.com/guide/topics/graphics/view-animation.html#tween-animation
     
4. Frame Animation - View Animation
   • http://developer.android.com/guide/topics/resources/animation-resource.html#Frame
   • http://developer.android.com/guide/topics/graphics/view-animation.html#frame-animation
     
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2. View Animation
   You can use View Animation in any View object to perform tweened animation and frame by frame animation.
   
   
   • ViewGroup Animation - create animation in code.
     (Sample: ApiDemo > Views > Layout Animation)
     
     Precedure:
     
     • Create Animation/AnimationSet
       
       AnimationSet set = new AnimationSet(true);
       Animation animation = new AlphaAnimation(0.0f, 1.0f);
       animation.setDuration(50);
       set.addAnimation(animation);
       
       animation = new TranslateAnimation(
                   Animation.RELATIVE_TO_SELF, 0.0f,Animation.RELATIVE_TO_SELF, 0.0f,
                   Animation.RELATIVE_TO_SELF, -1.0f,Animation.RELATIVE_TO_SELF, 0.0f
                   );
       animation.setDuration(100);
       set.addAnimation(animation);
       
       
     • Construct animation controller
       LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);
       
       
     • Set animation
       ListView listView = getListView();       
       listView.setLayoutAnimation(controller);   
          
       
   • ViewGroup Animation - Specify animation in resource file.
     
     • Define view animation
       For ListView: slide_right.xml
       
                       android:duration="@android:integer/config_shortAnimTime" />
       
       
       For GridView: fade.xml
              android:interpolator="@android:anim/accelerate_interpolator"
              android:fromAlpha="0.0" android:toAlpha="1.0"
              android:duration="@android:integer/config_longAnimTime" />
       
       
     • Define layoutAnimation
       (You can find all available attributes of layoutAnimation/gridLayoutAnimation in android.R.styleable)
       
       For ListView: layout_bottom_to_top_slide.xml
               android:delay="30%"
               android:animationOrder="reverse"
               android:animation="@anim/slide_right" />
       
       For GirdView: layout_grid_fade.xml
               android:rowDelay="50%"
               android:directionPriority="column"
               android:animation="@anim/fade" />
       
     • Use layoutAnimation
       For ListView:
           android:id="@android:id/list"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:layoutAnimation="@anim/layout_bottom_to_top_slide" />
       
       For GridView:
           android:layoutAnimation="@anim/layout_grid_fade"
       
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:padding="10dp"
           android:verticalSpacing="10dp"
       
           android:horizontalSpacing="10dp"
           android:numColumns="auto_fit"
           android:columnWidth="60dp"
           android:stretchMode="columnWidth"
       
           android:gravity="center" />
       
       
     • 
       
     
     
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3. Property Animation
   Introduced in Android 3.0, the property animation system allows you to animate almost anything (Views and non-Views). You can define an animation to change any object property (a field in an object, such as position property x of view) over time, regardless of whether it draws to the screen or not.
4. Activity Animation
   Start target activity in an activity subclass as following:
   startActivity(intent);
   overridePendingTransition(R.anim.xxx, R.anim.xxx);
   
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