Android动画（Animations）

<?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>

import android.app.Activity;
import android.os.Bundle;
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 Animation1Activity extends Activity{
private Button rotateButton = null;
private Button scaleButton = null;
private Button alphaButton = null;
private Button translateButton = null;
private ImageView mImageView = null;
private Animation Alpha;
private Animation Scale;
private Animation Translate;
private AnimationRotate;
@Override
public void onCreate(BundlesavedInstanceState) {
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);
mImageView = (ImageView)findViewById(R.id.image);

rotateButton.setOnClickListener(newRotateButtonListener());
scaleButton.setOnClickListener(newScaleButtonListener());
alphaButton.setOnClickListener(newAlphaButtonListener());
translateButton.setOnClickListener(
new TranslateButtonListener());
}
class AlphaButtonListener implementsOnClickListener{
public void onClick(Viewv) {
Alpha=animationUtils.loadAnimation(this,R.anim.alpha_action);
mImageView.startAnimation(Alpha);
}
}
class RotateButtonListener implementsOnClickListener{
public void onClick(Viewv) {

Rotate = AnimationUtils.loadAnimation(this,R.anim.rotate_action);
mImageView.startAnimation(Rotate);
}
class ScaleButtonListener implementsOnClickListener{
public void onClick(Viewv) {
Scale =AnimationUtils.loadAnimation(this,R.anim.scale_action);
mImageView.startAnimation(Scale);
}
class TranslateButtonListener implementsOnClickListener{
public void onClick(Viewv) {
Translate =AnimationUtils.loadAnimation(this,R.anim.translate_action);
mImageView.startAnimation(Translate);
}
}
}

1： alpha_action.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha
android:fromAlpha="0.1"
android:toAlpha="1.0"
android:duration="3000"
/>
</set>
2:rotate_action.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<rotate
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromDegrees="0"
android:toDegrees="+350"
android:pivotX="50%"
android:pivotY="50%"
android:duration="3000"/>
</set>
3: scale_action.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale
android:interpolator="@android:anim/accelerate_decelerate_interpolator"
android:fromXScale="0.0"
android:toXScale="1.4"
android:fromYScale="0.0"
android:toYScale="1.4"
android:pivotX="50%"
android:pivotY="50%"
android:fillAfter="false"
android:duration="700"/>
</set>

4: translate_action.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:fromXDelta="30"
android:toXDelta="-80"
android:fromYDelta="30"
android:toYDelta="300"
android:duration="2000"/>
</set>

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