The Animation in android

The android provide two types of animation.Tween Animation is one,such as rotation,translation,scale,gradual change(gradient).

main types:

Animation、AlphaAnimation、RotateAnimation、ScaleAnimation、TranslateAniamtion、AnimationSet

1.AlphaAnimation

the first argument means the start transparency of animation,the second argument means the end transparency of the animation.

2.RotateAnimation

arguments:

fromDegrees: start angle of the animation

toDegrees:end angle of the animation

3.ScaleAnimation

arguments:

fromX:    start scale in X cdoordination;

toX:         end scale in X coordination;

fromY:    start scale in Y coordination;

toY:         end scale in Y coordination;

on the other hand,you can set the scale mode:pivotXType/pivotYType,scale animation relative to x,y's start position:pivotXvalue/pivotYValue ect.

4.TranslateAnimation

arguments:

fromXDelta:    start X coordination of animation

toXDelta:         end X coordination of animation

fromYDelta:    start Y coordination of animation

toYDelta:         end Y coordination of animation

the layout file's code as bellow:

<?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android"> <Button android:id="@+id/button_scale" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="scale" android:layout_x="5dp" android:layout_y="383dp" /> <Button android:id="@+id/button_rotate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="rotate" android:layout_x="158dp" android:layout_y="383dp" /> <Button android:id="@+id/button_alpha" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="alpha" android:layout_x="5dp" android:layout_y="331dp" /> <Button android:id="@+id/button_translate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="translate" android:layout_x="160dp" android:layout_y="329dp" /> <Button android:id="@+id/button_alpha_translate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="alpha_translate" android:layout_x="84dp" android:layout_y="265dp" /> <ImageView android:id="@+id/imageview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_x="105dp" android:layout_y="133dp" android:src="@drawable/ic_launcher" /> </AbsoluteLayout> 

the class code:

 public class Animations_Activity extends Activity { private Button button1; private Button button2; private Button button3; private Button button4; private Button button5; private ImageView imageView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_animations_); button1=(Button)findViewById(R.id.button_alpha); button2=(Button)findViewById(R.id.button_rotate); button3=(Button)findViewById(R.id.button_scale); button4=(Button)findViewById(R.id.button_translate); button5=(Button)findViewById(R.id.button_alpha_translate); imageView=(ImageView)findViewById(R.id.imageview); button1.setOnClickListener(new MyButton()); button2.setOnClickListener(new MyButton()); button3.setOnClickListener(new MyButton()); button4.setOnClickListener(new MyButton()); button5.setOnClickListener(new MyButton()); } class MyButton implements OnClickListener{ @Override public void onClick(View arg0) { // TODO Auto-generated method stub switch (arg0.getId()) { case R.id.button_alpha: Alpha(); break; case R.id.button_rotate: Rotata(); break; case R.id.button_scale: Scale(); break; case R.id.button_translate: Translate(); break; case R.id.button_alpha_translate: Alpha_Translate(); break; default: break; } } } /* * 1.创建一个AnimationSet对象，该对象存储的是动画的集合 * 2.根据需要创建相应的Animation对象 * 3.根据动画的需求，为Animation对象设置相应的数据（即执行效果） * 4.奖Animation对象添加到AnimationSet对象当中 * 5.使用控件对象开始执行AnimationSet */ public void Alpha() { AnimationSet animationSet=new AnimationSet(true); AlphaAnimation alphaAnimation=new AlphaAnimation(1, 0); alphaAnimation.setDuration(2000); animationSet.addAnimation(alphaAnimation); imageView.startAnimation(animationSet); } public void Rotata(){ AnimationSet animationSet=new AnimationSet(true); //后面的四个参数定义的是旋转的圆心位置 RotateAnimation rotateAnimation=new RotateAnimation( 0, 360, Animation.RELATIVE_TO_PARENT, 1f, Animation.RELATIVE_TO_PARENT, 0f); rotateAnimation.setDuration(2000); animationSet.addAnimation(rotateAnimation); imageView.startAnimation(animationSet); } public void Scale() { AnimationSet animationSet=new AnimationSet(true); ScaleAnimation scaleAnimation=new ScaleAnimation( 1, 0.1f, 1, 0.1f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f); scaleAnimation.setDuration(2000); animationSet.addAnimation(scaleAnimation); imageView.startAnimation(scaleAnimation); } public void Translate() { AnimationSet animationSet=new AnimationSet(true); TranslateAnimation translateAnimation=new TranslateAnimation( Animation.RELATIVE_TO_SELF, 0f, //X轴的开始位置 Animation.RELATIVE_TO_SELF, 0.5f, //X轴的结束位置 Animation.RELATIVE_TO_SELF, 0f, //Y轴的开始位置 Animation.RELATIVE_TO_SELF, 1.0f); //Y轴的结束位置 translateAnimation.setDuration(2000); animationSet.addAnimation(translateAnimation); /* * 第一行的设置如果为true，则动画执行完之后效果定格在执行完之后的状态 * 第二行的设置如果为false，则动画执行完之后效果定格在执行完之后的状态 * 第三行设置的是一个long类型的值，是指动画延迟多少毫秒之后执行 * 第四行定义的是动画重复几次执行 */ animationSet.setFillAfter(true); animationSet.setFillBefore(false); animationSet.setStartOffset(2000); animationSet.setRepeatCount(3); imageView.startAnimation(animationSet); } public void Alpha_Translate() { AnimationSet animationSet=new AnimationSet(true); AlphaAnimation alphaAnimation=new AlphaAnimation(1, 0); alphaAnimation.setDuration(2000); animationSet.addAnimation(alphaAnimation); TranslateAnimation translateAnimation=new TranslateAnimation( Animation.RELATIVE_TO_SELF, 0f, //X轴的开始位置 Animation.RELATIVE_TO_SELF, 0.5f, //X轴的结束位置 Animation.RELATIVE_TO_SELF, 0f, //Y轴的开始位置 Animation.RELATIVE_TO_SELF, 1.0f); //Y轴的结束位置 translateAnimation.setDuration(2000); animationSet.addAnimation(translateAnimation); imageView.startAnimation(animationSet); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.activity_animations_, menu); return true; } } 

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