AndroidMaterialDesign动画之Animate View State Changes

1，Material Design简介
2，MaterialDesign主题Theme
3，android:elevation的使用
4，AndroidMaterialDesign动画之RippleDrawable
5，AndroidMaterialDesign动画之CircularReveal
6，AndroidMaterialDesign动画之Activity Transitions
7，AndroidMaterialDesign动画之Curved Motion
8，AndroidMaterialDesign动画之Animate View State Changes

view状态改变时执行的动画。
之前都写过选择器，其实跟这个一样一样的。

view的状态：

android:state_activated      State value for StateListDrawable,                              set when a view or its parent has been "activated"                              meaning the user has currently marked it as being                              of interest. android:state_active         State value for StateListDrawable.                              display a check mark. android:state_checked        State identifier indicating that the object is                              currently checked. android:state_enabled        State value for StateListDrawable, set when a view is enabled. android:state_first          State value for StateListDrawable. android:state_focused        State value for StateListDrawable, set when a view has input focus. android:state_last           State value for StateListDrawable. android:state_middle         State value for StateListDrawable. android:state_pressed        State value for StateListDrawable, set when the user is pressing down in a view. android:state_selected       State value for StateListDrawable, set when a view (or one of its parents)                              is currently selected. android:state_single         State value for StateListDrawable. android:state_window_focused    

view状态改变的动画主要是两个类：
1，StateListAnimator 是个动画
2，AnimatedStateListDrawable 是个Drawable
也就是说StateListAnimator在res/anim中
               AnimatedStateListDrawable在res/drawable中。

StateListAnimator
xml文件：你可以改成任意一种objectAnimator动画。 这里使用的是translationZ

<!-- animate the translationZ property of a view when pressed --><selector xmlns:android="http://schemas.android.com/apk/res/android">  <item android:state_pressed="true">    <set>      <objectAnimator android:propertyName="translationZ"        android:duration="@android:integer/config_shortAnimTime"        android:valueTo="2dp"        android:valueType="floatType"/>        <!-- you could have other objectAnimator elements             here for "x" and "y", or other properties -->    </set>  </item>  <item android:state_enabled="true"    android:state_pressed="false"    android:state_focused="true">    <set>      <objectAnimator android:propertyName="translationZ"        android:duration="100"        android:valueTo="0"        android:valueType="floatType"/>    </set>  </item></selector>

代码中加载：1，加载动画。2 设置动画。

StateListAnimator stateLAnim = AnimatorInflater.loadStateListAnimator(this,R.anim.elevation);   tv_elevation.setStateListAnimator(stateLAnim);

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AnimatedStateListDrawable

xml布局：这个效果有点意思
当你是pressed状态的时候animation-list正着走一遍，drawable使用最后一个。
当你是default状态时animation-list反着走一遍，drawable使用第一个。

res/drawable/myanimstatedrawable<?xml version="1.0" encoding="utf-8"?><animated-selector xmlns:android="http://schemas.android.com/apk/res/android" >    <!-- provide a different drawable for each state -->    <item        android:id="@+id/pressed"        android:drawable="@drawable/btn_pressed"        android:state_pressed="true"/>    <!-- <item        android:id="@+id/focused"        android:drawable="@drawable/btn_focused"        android:state_focused="true"/> -->    <item        android:id="@id/default1"        android:drawable="@drawable/btn_default"/>    <!-- specify a transition -->    <transition        android:fromId="@+id/default1"        android:toId="@+id/pressed" >        <animation-list>            <item                android:drawable="@drawable/con_time_tk"                android:duration="500"/>            <item                android:drawable="@drawable/btn_default"                android:duration="500"/>            <item                android:drawable="@drawable/btn_focused"                android:duration="500"/>            <item                android:drawable="@drawable/btn_pressed"                android:duration="500"/>            <item                android:drawable="@drawable/con_time_xm"                android:duration="500"/>            <item                android:drawable="@drawable/con_time_tk"                android:duration="500"/>        </animation-list>    </transition></animated-selector>

xml文件作为控件的背景使用：

<TextView            android:id="@+id/tv_elevation"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_marginLeft="5dip"            android:layout_marginRight="10dip"            android:background="@drawable/myanimstatedrawable"            android:clickable="true"            android:gravity="center"            android:elevation="5dip"            android:text="elevation10"            android:textSize="20sp" />