一、Animations介绍
Animations是一个实现android UI界面动画效果的API,Animations提供了一系列的动画效果,可以进行旋转、缩放、淡入淡出等,这些效果可以应用在绝大多数的控件中。
二、Animations的分类
Animations从总体上可以分为两大类:
1.TweenedAnimations:该类Animations提供了旋转、移动、伸展和淡出等效果。Alpha——淡入淡出,Scale——缩放效果,Rotate——旋转,Translate——移动效果。
2.Frame-by-frameAnimations:这一类Animations可以创建一个Drawable序列,这些Drawable可以按照指定的时间间歇一个一个的显示。
三、Animations的使用方法(代码中使用)
Animations extends Object implementsCloneable
使用TweenedAnimations的步骤:
1.创建一个AnimationSet对象(Animation子类);
2.增加需要创建相应的Animation对象;
3.更加项目的需求,为Animation对象设置相应的数据;
4.将Animatin对象添加到AnimationSet对象当中;
5.使用控件对象开始执行AnimationSet。
Tweened Animations的分类
1、Alpha:淡入淡出效果
2、Scale:缩放效果
3、Rotate:旋转效果
4、Translate:移动效果
Animation的四个子类:
AlphaAnimation、TranslateAnimation、ScaleAnimation、RotateAnimation
四、具体实现
1、main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
-
- <LinearLayout
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:orientation="horizontal" >
- <Button
- android:id="@+id/rotateButton"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="旋转" />
- <Button
- android:id="@+id/scaleButton"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="缩放" />
- <Button
- android:id="@+id/alphaButton"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="淡入淡出" />
- <Button
- android:id="@+id/translateButton"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="移动" />
- </LinearLayout>
- <LinearLayout
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <ImageView
- android:id="@+id/image"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:src="@drawable/an" />
- </LinearLayout>
- </LinearLayout>
2、.java文件
- importandroid.app.Activity;
- importandroid.os.Bundle;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- import android.view.animation.AlphaAnimation;
- import android.view.animation.Animation;
- importandroid.view.animation.AnimationSet;
- importandroid.view.animation.RotateAnimation;
- importandroid.view.animation.ScaleAnimation;
- import android.view.animation.TranslateAnimation;
- importandroid.widget.Button;
- importandroid.widget.ImageView;
- public class Animation1Activity extends Activity {
- private Button rotateButton = null;
- private Button scaleButton = null;
- private Button alphaButton = null;
- private Button translateButton = null;
- private ImageView image = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
-
- rotateButton = (Button)findViewById(R.id.rotateButton);
- scaleButton = (Button)findViewById(R.id.scaleButton);
- alphaButton = (Button)findViewById(R.id.alphaButton);
- translateButton = (Button)findViewById(R.id.translateButton);
- image = (ImageView)findViewById(R.id.image);
-
- rotateButton.setOnClickListener(newRotateButtonListener());
- scaleButton.setOnClickListener(newScaleButtonListener());
- alphaButton.setOnClickListener(newAlphaButtonListener());
- translateButton.setOnClickListener(
- new TranslateButtonListener());
- }
- class AlphaButtonListener implementsOnClickListener{
- public void onClick(View v) {
-
-
- AnimationSet animationSet = new AnimationSet(true);
-
- AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);
-
- alphaAnimation.setDuration(500);
-
- animationSet.addAnimation(alphaAnimation);
-
- image.startAnimation(animationSet);
- }
- }
- class RotateButtonListener implementsOnClickListener{
- public void onClick(View v) {
- AnimationSet animationSet = new AnimationSet(true);
-
-
-
-
-
-
-
- RotateAnimation rotateAnimation = new RotateAnimation(0, 360,
- Animation.RELATIVE_TO_SELF,0.5f,
- Animation.RELATIVE_TO_SELF,0.5f);
- rotateAnimation.setDuration(1000);
- animationSet.addAnimation(rotateAnimation);
- image.startAnimation(animationSet);
- }
- }
- class ScaleButtonListener implementsOnClickListener{
- public void onClick(View v) {
- AnimationSet animationSet = new AnimationSet(true);
-
-
-
-
-
-
-
-
- ScaleAnimation scaleAnimation = new ScaleAnimation(
- 0, 0.1f,0,0.1f,
- Animation.RELATIVE_TO_SELF,0.5f,
- Animation.RELATIVE_TO_SELF,0.5f);
- scaleAnimation.setDuration(1000);
- animationSet.addAnimation(scaleAnimation);
- image.startAnimation(animationSet);
- }
- }
- class TranslateButtonListener implementsOnClickListener{
- public void onClick(View v) {
- AnimationSet animationSet = new AnimationSet(true);
-
-
-
-
- TranslateAnimation translateAnimation =
- new TranslateAnimation(
- Animation.RELATIVE_TO_SELF,0f,
- Animation.RELATIVE_TO_SELF,0.5f,
- Animation.RELATIVE_TO_SELF,0f,
- Animation.RELATIVE_TO_SELF,0.5f);
- translateAnimation.setDuration(1000);
- animationSet.addAnimation(translateAnimation);
- image.startAnimation(animationSet);
- }
- }
- }
Tween Animations的通用方法
1、setDuration(longdurationMills)
设置动画持续时间(单位:毫秒)
2、setFillAfter(Boolean fillAfter)
如果fillAfter的值为true,则动画执行后,控件将停留在执行结束的状态
3、setFillBefore(Boolean fillBefore)
如果fillBefore的值为true,则动画执行后,控件将回到动画执行之前的状态
4、setStartOffSet(long startOffSet)
设置动画执行之前的等待时间
5、setRepeatCount(int repeatCount)
设置动画重复执行的次数
在代码中使用Animations可以很方便的调试、运行,但是代码的可重用性差,重复代码多。同样可以在xml文件中配置Animations,这样做可维护性变高了,只不过不容易进行调试。
一、在xml中使用Animations步骤
1.在res文件夹下建立一个anim文件夹;
2.创建xml文件,并首先加入set标签,更改标签如下:
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator">
- </set>
3.在该标签当中加入rotate,alpha,scale或者translate标签;
- <alpha
- android:fromAlpha="1.0"
- android:toAlpha="0.0"
- android:startOffset="500"
- android:duration="500"/>
4.在代码当中使用AnimationUtils当中装载xml文件,并生成Animation对象。因为Animation是AnimationSet的子类,所以向上转型,用Animation对象接收。
- Animation animation = AnimationUtils.loadAnimation(
- Animation1Activity.this, R.anim.alpha);
-
- image.startAnimation(animation);
二、具体实现
1、 alpha.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator">
- <!-- fromAlpha和toAlpha是起始透明度和结束时透明度 -->
- <alpha
- android:fromAlpha="1.0"
- android:toAlpha="0.0"
- android:startOffset="500"
- android:duration="500"/>
- </set>
2、 rotate.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator">
- <!--
- fromDegrees:开始的角度
- toDegrees:结束的角度,+表示是正的
- pivotX:用于设置旋转时的x轴坐标
- 例
- 1)当值为"50",表示使用绝对位置定位
- 2)当值为"50%",表示使用相对于控件本身定位
- 3)当值为"50%p",表示使用相对于控件的父控件定位
- pivotY:用于设置旋转时的y轴坐标
- -->
- <rotate
- android:fromDegrees="0"
- android:toDegrees="+360"
- android:pivotX="50%"
- android:pivotY="50%"
- android:duration="1000"/>
- </set>
3、 scale.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator">
- <!--
- 起始x轴坐标
- 止x轴坐标
- 始y轴坐标
- 止y轴坐标
- 轴的坐标
- 轴的坐标
- -->
- <scale
- android:fromXScale="1.0"
- android:toXScale="0.0"
- android:fromYScale="1.0"
- android:toYScale="0.0"
- android:pivotX="50%"
- android:pivotY="50%"
- android:duration="1000"/>
- </set>
4、 translate.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator">
- <!--
- 始x轴坐标
- 止x轴坐标
- 始y轴坐标
- 止y轴坐标
- -->
- <translate
- android:fromXDelta="0%"
- android:toXDelta="100%"
- android:fromYDelta="0%"
- android:toYDelta="100%"
- android:duration="2000"/>
- </set>
5、 .java文件
- importandroid.app.Activity;
- importandroid.os.Bundle;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- import android.view.animation.Animation;
- importandroid.view.animation.AnimationUtils;
- import android.widget.Button;
- import android.widget.ImageView;
-
- public class Animation1Activity extends Activity {
- private Button rotateButton = null;
- private Button scaleButton = null;
- private Button alphaButton = null;
- private Button translateButton = null;
- private ImageView image = null;
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
-
- rotateButton = (Button) findViewById(R.id.rotateButton);
- scaleButton = (Button) findViewById(R.id.scaleButton);
- alphaButton = (Button) findViewById(R.id.alphaButton);
- translateButton = (Button) findViewById(R.id.translateButton);
- image = (ImageView) findViewById(R.id.image);
-
- rotateButton.setOnClickListener(newRotateButtonListener());
- scaleButton.setOnClickListener(newScaleButtonListener());
- alphaButton.setOnClickListener(newAlphaButtonListener());
- translateButton.setOnClickListener(newTranslateButtonListener());
- }
-
- class AlphaButtonListener implementsOnClickListener {
- public void onClick(View v) {
-
- Animation animation = AnimationUtils.loadAnimation(
- Animation1Activity.this, R.anim.alpha);
-
- image.startAnimation(animation);
- }
- }
-
- class RotateButtonListener implementsOnClickListener {
- public void onClick(View v) {
- Animation animation = AnimationUtils.loadAnimation(
- Animation1Activity.this, R.anim.rotate);
- image.startAnimation(animation);
- }
- }
-
- class ScaleButtonListener implementsOnClickListener {
- public void onClick(View v) {
- Animation animation = AnimationUtils.loadAnimation(
- Animation1Activity.this, R.anim.scale);
- image.startAnimation(animation);
- }
- }
-
- class TranslateButtonListener implementsOnClickListener {
- public void onClick(View v) {
- Animation animation = AnimationUtils.loadAnimation(Animation1Activity.this, R.anim.translate);
- image.startAnimation(animation);
- }
- }
- }
AnimationSet的具体使用方法
1.AnimationSet是Animation的子类;
2.一个AnimationSet包含了一系列的Animation;
3.针对AnimationSet设置一些Animation的常见属性(如startOffset,duration等),可以被包含在AnimationSet当中的Animation集成;
例:一个AnimationSet中有两个Animation,效果叠加
第一种方法:
doubleani.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator"
- android:shareInterpolator="true">
- <!-- fromAlpha和toAlpha是起始透明度和结束时透明度 -->
- <alpha
- android:fromAlpha="1.0"
- android:toAlpha="0.0"
- android:startOffset="500"
- android:duration="500"/>
- <translate
- android:fromXDelta="0%"
- android:toXDelta="100%"
- android:fromYDelta="0%"
- android:toYDelta="100%"
- android:duration="2000"/>
- </set>
.java文件中
- classDoubleButtonListener implements OnClickListener {
- public void onClick(View v) {
-
- Animation animation = AnimationUtils.loadAnimation(
- Animation2Activity.this, R.anim. doubleani);
-
- image.startAnimation(animation);
- }
- }
第二种方法:
.java文件中
- classDoubleButtonListener implements OnClickListener {
- public void onClick(View v) {
- AnimationSet animationSet = new AnimationSet(true);
- AlphaAnimation alphaAnimation = new AlphaAnimation(1, 0);
- RotateAnimation rotateAnimation = new RotateAnimation(0, 360,
- Animation.RELATIVE_TO_SELF,0.5f,
- Animation.RELATIVE_TO_SELF,0.5f);
- rotateAnimation.setDuration(1000);
- animationSet.addAnimation(rotateAnimation);
- animationSet.addAnimation(alphaAnimation);
- image.startAnimation(animationSet);
-
- }
- }
Interpolator的具体使用方法
Interpolator定义了动画变化的速率,在Animations框架当中定义了一下几种Interpolator
AccelerateDecelerateInterpolator:在动画开始与结束的地方速率改变比较慢,在中间的时候速率快。
AccelerateInterpolator:在动画开始的地方速率改变比较慢,然后开始加速
CycleInterpolator:动画循环播放特定的次数,速率改变沿着正弦曲线
DecelerateInterpolator:在动画开始的地方速率改变比较慢,然后开始减速
LinearInterpolator:动画以均匀的速率改变
分为以下几种情况:
1、在set标签中
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator"/>
2、如果在一个set标签中包含多个动画效果,如果想让这些动画效果共享一个Interpolator。
- android:shareInterpolator="true"
3、如果不想共享一个interpolator,则设置android:shareInterpolator="true",并且需要在每一个动画效果处添加interpolator。
- <alpha
- android:interpolator="@android:anim/accelerate_decelerate_interpolator"
- android:fromAlpha="1.0"
- android:toAlpha="0.0"
- android:startOffset="500"
- android:duration="500"/>
4、如果是在代码上设置共享一个interpolator,则可以在AnimationSet设置interpolator。
- AnimationSet animationSet = newAnimationSet(true);
- animationSet.setInterpolator(new AccelerateInterpolator());
5、如果不设置共享一个interpolator则可以在每一个Animation对象上面设置interpolator。
- AnimationSet animationSet = newAnimationSet(false);
- alphaAnimation.setInterpolator(new AccelerateInterpolator());
- rotateAnimation.setInterpolator(new DecelerateInterpolator());
Frame-By-FrameAnimations的使用方法
Frame-By-FrameAnimations是一帧一帧的格式显示动画效果。类似于电影胶片拍摄的手法。
main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <LinearLayout
- android:orientation="horizontal"
- android:layout_height="wrap_content"
- android:layout_width="wrap_content">
- <Button
- android:id="@+id/button"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="运动"/>
- </LinearLayout>
- <LinearLayout
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <ImageView
- android:id="@+id/image"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"/>
- </LinearLayout>
- </LinearLayout>
3、anim.xml
- <?xml version="1.0" encoding="utf-8"?>
- <animation-list xmlns:android="http://schemas.android.com/apk/res/android"
- android:oneshot="false">
- <item android:drawable="@drawable/a_01" android:duration="50"/>
- <item android:drawable="@drawable/a_02" android:duration="50"/>
- <item android:drawable="@drawable/a_03" android:duration="50"/>
- <item android:drawable="@drawable/a_04" android:duration="50"/>
- <item android:drawable="@drawable/a_05" android:duration="50"/>
- <item android:drawable="@drawable/a_06" android:duration="50"/>
- </animation-list>
4、.java文件
- importandroid.app.Activity;
- importandroid.graphics.drawable.AnimationDrawable;
- importandroid.os.Bundle;
- importandroid.view.View;
- importandroid.view.View.OnClickListener;
- importandroid.widget.Button;
- importandroid.widget.ImageView;
- public class AnimationsActivity extends Activity {
- private Button button = null;
- private ImageView imageView = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- button = (Button)findViewById(R.id.button);
- imageView = (ImageView)findViewById(R.id.image);
- button.setOnClickListener(newButtonListener());
- }
- class ButtonListener implementsOnClickListener{
- public void onClick(View v) {
- imageView.setBackgroundResource(R.anim.anim);
- AnimationDrawable animationDrawable = (AnimationDrawable)
- imageView.getBackground();
- animationDrawable.start();
- }
- }
- }
LayoutAnimationsController
1、什么是LayoutAnimationsController
LayoutAnimationsController可以用于实现使多个控件按顺序一个一个的显示。
1)LayoutAnimationsController用于为一个layout里面的控件,或者是一个ViewGroup里面的控件设置统一的动画效果。
2)每一个控件都有相同的动画效果。
3)控件的动画效果可以在不同的时间显示出来。
4)LayoutAnimationsController可以在xml文件当中设置,以可以在代码当中进行设置。
2、在xml当中使用LayoutAnimationController
1)在res/anim文件夹下创建一个名为list_anim_layout.xml文件:
android:delay- 动画间隔时间;子类动画时间间隔 (延迟) 70% 也可以是一个浮点数 如“1.2”等
android:animationOrder- 动画执行的循序(normal:顺序,random:随机,reverse:反向显示)
android:animation– 引用动画效果文件
- <layoutAnimation
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:delay="0.5"
- android:animationOrder="normal"
- android:animation="@anim/list_anim"/>
2)创建list_anim.xml文件,设置动画效果
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator"
- android:shareInterpolator="true">
- <alpha
- android:fromAlpha="0.0"
- android:toAlpha="1.0"
- android:duration="1000"/>
- </set>
3)在布局文件main.xml当中为ListVIew添加如下配置
- <ListView
- android:id="@id/android:list"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:scrollbars="vertical"
- android:layoutAnimation="@anim/list_anim_layout"/>
4)程序结构
5)list_anim_layout.xml
- <layoutAnimation
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:delay="0.5"
- android:animationOrder="normal"
- android:animation="@anim/list_anim"/>
6)list_anim.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator"
- android:shareInterpolator="true">
- <alpha
- android:fromAlpha="0.0"
- android:toAlpha="1.0"
- android:duration="1000"/>
- </set>
7)main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <ListView
- android:id="@id/android:list"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:scrollbars="vertical"
- android:layoutAnimation="@anim/list_anim_layout"/>
- <Button
- android:id="@+id/button"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="测试"/>
- </LinearLayout>
8)item.xml
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="horizontal"
- android:paddingLeft="10dip"
- android:paddingRight="10dip"
- android:paddingTop="1dip"
- android:paddingBottom="1dip">
- <TextView android:id="@+id/name"
- android:layout_width="180dip"
- android:layout_height="30dip"
- android:textSize="5pt"
- android:singleLine="true" />
- <TextView android:id="@+id/sex"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:textSize="5pt"
- android:singleLine="true"/>
- </LinearLayout>
9)java文件
- public class Animation2Activity extendsListActivity {
- private Button button = null;
- private ListView listView = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- listView = getListView();
- button = (Button)findViewById(R.id.button);
- button.setOnClickListener(newButtonListener());
- }
- private ListAdapter createListAdapter() {
- List<HashMap<String,String>> list =
- new ArrayList<HashMap<String,String>>();
- HashMap<String,String> m1 = new HashMap<String,String>();
- m1.put("name", "bauble");
- m1.put("sex", "male");
- HashMap<String,String> m2 = new HashMap<String,String>();
- m2.put("name", "Allorry");
- m2.put("sex", "male");
- HashMap<String,String> m3 = new HashMap<String,String>();
- m3.put("name", "Allotory");
- m3.put("sex", "male");
- HashMap<String,String> m4 = new HashMap<String,String>();
- m4.put("name", "boolbe");
- m4.put("sex", "male");
- list.add(m1);
- list.add(m2);
- list.add(m3);
- list.add(m4);
- SimpleAdapter simpleAdapter = new SimpleAdapter(
- this,list,R.layout.item,new String[]{"name","sex"},
- new int[]{R.id.name,R.id.sex});
- return simpleAdapter;
- }
- private class ButtonListener implementsOnClickListener{
- public void onClick(View v) {
- listView.setAdapter(createListAdapter());
- }
- }
- }
备注:要将整个动画效果设置到LinerLayout中,可以这样设置:
- <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:layoutAnimation="@anim/list_anim_layout"
- >
3、在代码当中使用LayoutAnimationController
1)去掉main.xml中的android:layoutAnimation="@anim/list_anim_layout"/>
2)创建一个Animation对象:可以通过装载xml文件,或者是直接使用Animation的构造方法创建Animation对象;
- Animation animation = (Animation) AnimationUtils.loadAnimation(
- Animation2Activity.this, R.anim.list_anim);
3)创建LayoutAnimationController对象:
- LayoutAnimationController controller = new LayoutAnimationController(animation);
4)设置控件的显示顺序以及延迟时间
- controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
- controller.setDelay(0.5f);
5)为ListView设置LayoutAnimationController属性:
- listView.setLayoutAnimation(controller);
完整代码:
- private class ButtonListener implementsOnClickListener {
- public void onClick(View v) {
- listView.setAdapter(createListAdapter());
- Animation animation = (Animation) AnimationUtils.loadAnimation(
- Animation2Activity.this, R.anim.list_anim);
-
- LayoutAnimationController controller = new LayoutAnimationController(animation);
- controller.setOrder(LayoutAnimationController.ORDER_NORMAL);
- controller.setDelay(0.5f);
- listView.setLayoutAnimation(controller);
- }
- }
AnimationListener
1、什么是AnimationListener
1).AnimationListener是一个监听器,该监听器在动画执行的各个阶段会得到通知,从而调用相应的方法;
2).AnimationListener主要包括如下三个方法:
n ·onAnimationEnd(Animationanimation) - 当动画结束时调用
n ·onAnimationRepeat(Animationanimation) - 当动画重复时调用
n ·onAniamtionStart(Animationanimation) - 当动画启动时调用
2、具体实现
1)main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/layout"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <Button android:id="@+id/addButton"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_alignParentBottom="true"
- android:text="添加图片" />
- <Button android:id="@+id/deleteButton"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:layout_above="@id/addButton"
- android:text="删除图片" />
- <ImageView android:id="@+id/image"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:layout_marginTop="100dip"
- android:src="@drawable/an" />
- </RelativeLayout>
2).java文件
- public class Animation2Activity extends Activity {
- private Button addButton = null;
- private Button deleteButton = null;
- private ImageView imageView = null;
- private ViewGroup viewGroup = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- addButton = (Button)findViewById(R.id.addButton);
- deleteButton = (Button)findViewById(R.id.deleteButton);
- imageView = (ImageView)findViewById(R.id.image);
-
- viewGroup = (ViewGroup)findViewById(R.id.layout);
- addButton.setOnClickListener(newAddButtonListener());
- deleteButton.setOnClickListener(newDeleteButtonListener());
- }
- private class AddButtonListener implements OnClickListener{
- public void onClick(View v) {
-
- AlphaAnimation animation = new AlphaAnimation(0.0f, 1.0f);
- animation.setDuration(1000);
- animation.setStartOffset(500);
-
- ImageView newImageView = new ImageView(
- Animation2Activity.this);
- newImageView.setImageResource(R.drawable.an);
- viewGroup.addView(newImageView,
- new LayoutParams(
- LayoutParams.FILL_PARENT,
- LayoutParams.WRAP_CONTENT));
- newImageView.startAnimation(animation);
- }
- }
- private class DeleteButtonListener implements OnClickListener{
- public void onClick(View v) {
-
- AlphaAnimation animation = new AlphaAnimation(1.0f, 0.0f);
- animation.setDuration(1000);
- animation.setStartOffset(500);
-
- animation.setAnimationListener(
- new RemoveAnimationListener());
- imageView.startAnimation(animation);
- }
- }
- private class RemoveAnimationListener implements AnimationListener{
-
- public void onAnimationEnd(Animation animation) {
- System.out.println("onAnimationEnd");
- viewGroup.removeView(imageView);
- }
- public void onAnimationRepeat(Animation animation) {
- System.out.println("onAnimationRepeat");
- }
- public void onAnimationStart(Animation animation) {
- System.out.println("onAnimationStart");
- }
- }
- }
3、总结一下
可以在Activity中动态添加和删除控件,方法是:
1)取到那个Layout
- viewGroup = (ViewGroup)findViewById(R.id.layout);
2)添加时,先创建对象,然后添加
- ImageView newImageView = new ImageView(
- Animation2Activity.this);
- newImageView.setImageResource(R.drawable.an);
- viewGroup.addView(newImageView,
- new LayoutParams(
- LayoutParams.FILL_PARENT,
- LayoutParams.WRAP_CONTENT));
3)删除时,直接删除。
- viewGroup.removeView(imageView);