原来一直对动画一知半解，只知道按照网上的方法会用就行了，但是自己写起来感觉确实有点费劲，今天终于研究了代码实现，一下子感觉清晰多了。先把总结如下，代码中有详细的注释。
动画分类
1.Peoperty Animation
这个动画是Android3.0之后推出的目前用处不大。
2.View Animation
这类动画也叫tween animation 主要分为 渐变动画(AlphaAnimation)旋转动画(RotateAnimation)
缩放动画(ScaleAnimation)位移动画(TranslateAnimation)
3.Drawable Animation
这类动画也叫帧动画 FrameAnimation
先上tween animation
MainActivity.java
package com.example.testanimation;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
private ImageView imgView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imgView = (ImageView)this.findViewById(R.id.imgView) ;
Button btnAlpha = (Button)this.findViewById(R.id.btnAlpha) ;
btnAlpha.setOnClickListener(new AnimationOnClickListener(AnimationType.alpha));
Button btnRotate = (Button)this.findViewById(R.id.btnRotate) ;
btnRotate.setOnClickListener(new AnimationOnClickListener(AnimationType.rotate));
Button btnTraslate = (Button)this.findViewById(R.id.btnTraslate) ;
btnTraslate.setOnClickListener(new AnimationOnClickListener(AnimationType.traslate));
Button btnScale = (Button)this.findViewById(R.id.btnScale) ;
btnScale.setOnClickListener(new AnimationOnClickListener(AnimationType.scale));
Button btnComplex = (Button)this.findViewById(R.id.btnComplex) ;
btnComplex.setOnClickListener(new AnimationOnClickListener(AnimationType.complex));
}
enum AnimationType {
alpha,
rotate,
traslate,
scale,
complex
}
class AnimationOnClickListener implements OnClickListener {
private AnimationType mAnimationType;
public AnimationOnClickListener (AnimationType animationType) {
this.mAnimationType = animationType;
}
@Override
public void onClick(View v) {
switch (mAnimationType) {
case alpha:
/**
* 透明度从不透明变为0.2透明度
*/
AlphaAnimation _alphaAnimation = new AlphaAnimation(1.0f, 0.2f);
_alphaAnimation.setDuration(200);
_alphaAnimation.setFillAfter(true);//动画执行完的状态显示
imgView.startAnimation(_alphaAnimation);
break;
case rotate:
/**
* RotateAnimation 以图片中点为圆心旋转360度
* params:
* pivotXType 中心点x坐标类型 RELATIVE_TO_SELF相对于自己，RELATIVE_TO_PARENT相对于父view
* pivotYType 同上
*
* pivotXValue，pivotYValue(圆心)
*
*/
RotateAnimation _rotateAnimation = new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
_rotateAnimation.setDuration(3000);
// _rotateAnimation.setRepeatMode(Animation.REVERSE);
imgView.startAnimation(_rotateAnimation);
break;
case traslate:
/**
* 按照图片的宽高2倍的位移移动
*/
TranslateAnimation _translateAnimation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0f, Animation.RELATIVE_TO_SELF, 2f, Animation.RELATIVE_TO_SELF, 0f, Animation.RELATIVE_TO_SELF, 2f);
_translateAnimation.setDuration(3000);
_translateAnimation.setFillAfter(true);
imgView.startAnimation(_translateAnimation);
break;
case scale:
/**
* ScaleAnimation 以图片左上角为静止点，按照1.5倍尺寸放大
* params:
* pivotXType 中心点x坐标类型 RELATIVE_TO_SELF相对于自己，RELATIVE_TO_PARENT相对于父view
* pivotYType 同上
* pivotXValue，pivotYValue(静止点)
*/
ScaleAnimation _scaleAnimation = new ScaleAnimation(1.0f, 1.5f, 1.0f, 1.5f, Animation.RELATIVE_TO_PARENT, 0f, Animation.RELATIVE_TO_SELF, 0f);
_scaleAnimation.setDuration(300);
_scaleAnimation.setZAdjustment(Animation.ZORDER_TOP);
_scaleAnimation.setRepeatCount(1);
_scaleAnimation.setRepeatMode(Animation.REVERSE);//必须设置setRepeatCount此设置才生效，动画执行完成之后按照逆方式动画返回
imgView.startAnimation(_scaleAnimation);
break;
case complex:
AnimationSet _animationSet = new AnimationSet(false);
AlphaAnimation _alphaAnimation2 = new AlphaAnimation(1.0f, 0.2f);
_alphaAnimation2.setDuration(1000);
_alphaAnimation2.setRepeatCount(1);
_alphaAnimation2.setRepeatMode(Animation.REVERSE);
// _alphaAnimation2.setFillAfter(true);//设此地方不好使，必须设置到AnimationSet中
TranslateAnimation _translateAnimation2 = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0f, Animation.RELATIVE_TO_SELF, 2f, Animation.RELATIVE_TO_SELF, 0f, Animation.RELATIVE_TO_SELF, 2f);
_translateAnimation2.setDuration(1000);
_translateAnimation2.setRepeatCount(1);
_translateAnimation2.setRepeatMode(Animation.REVERSE);
// _translateAnimation2.setFillAfter(true);
_animationSet.addAnimation(_alphaAnimation2);
_animationSet.addAnimation(_translateAnimation2);
_animationSet.setFillAfter(true);
// _animationSet.setRepeatCount(1);
// _animationSet.setRepeatMode(Animation.REVERSE);//这两个属性设此地不好使，必须单个设置
imgView.startAnimation(_animationSet);
break;
default:
break;
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ImageView
android:id="@+id/imgView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_launcher" />
<Button
android:id="@+id/btnAlpha"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="alpha" />
<Button
android:id="@+id/btnRotate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="rotate" />
<Button
android:id="@+id/btnTraslate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="traslate" />
<Button
android:id="@+id/btnScale"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="scale" />
<Button
android:id="@+id/btnComplex"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="animationSet" />
</LinearLayout>
下面为frame animation
public class FrameAnimationAcitvity extends Activity {
private ImageView imageView;
private AnimationDrawable ad;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.animation_list);
Button button=(Button)findViewById(R.id.button1);
imageView=(ImageView)findViewById(R.id.imageView1);
imageView.setBackgroundResource(R.drawable.framedrawable);
ad=(AnimationDrawable)imageView.getBackground();
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ad.start();
}
});
}
}framedrawable.xml
<animation-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:drawable="@drawable/grid_liushui" android:duration="200"/>
<item android:drawable="@drawable/grid_payout" android:duration="200"/>
<item android:drawable="@drawable/grid_report" android:duration="200"/>
</animation-list></span>
附上tween动画的源码下载链接
http://download.csdn.net/detail/duanyu218/7449471