如何实现Android动画的实例

android:id="@+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Rotate"
android:textSize="50px"
android:layout_x="150px"
android:layout_y="30px"
android:src="@drawable/ro">
>

public class TestRotate extends Activity implements OnClickListener{
private mageView imageview;
private ViewGroup mContainer;
/**
*这个变量设置的是图片，如果是多张图片，那么可以用数组，如
*private static final int IMAGE = new int[]{
* R.drawable.ro,
* R.drawable.icon
*};
*有多少图片就放多少，我这里做的只是一张图片的翻转
*
*/
private static final int IMAGE = R.drawable.ro;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageview = (ImageView) findViewById(R.id.image);
mContainer = (ViewGroup) findViewById(R.id.container);
/**
* 设置最新显示的图片
* 如果是数组，那么可以写成IMAGE[int]
*
*/
imageview.setImageResource(IMAGE);
/**
*
* 设置ImageView的OnClickListener
*
*/
imageview.setClickable(true);
imageview.setFocusable(true);
imageview.setOnClickListener(this);
}
private void applyRotation(int position, float start, float end) {
// Find the center of the container
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;
final Rotate3d rotation =
new Rotate3d(start, end, centerX, centerY, 310.0f, true);
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
rotation.setAnimationListener(new DisplayNextView(position));
mContainer.startAnimation(rotation);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
/**
*
* 调用这个方法，就是翻转图片
* 参数很简单，大家都应该看得懂
* 简单说下，第一个是位置，第二是开始的角度，第三个是结束的角度
* 这里需要说明的是，如果是要回到上一张
* 把第一个参数设置成-1就行了
*
*/
applyRotation(0,0,90);
}
private final class DisplayNextView implements Animation.AnimationListener {
private final int mPosition;
private DisplayNextView(int position) {
mPosition = position;
}
public void onAnimationStart(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
mContainer.post(new SwapViews(mPosition));
}
public void onAnimationRepeat(Animation animation) {
}
}
/**
* This class is responsible for swapping the views and start the second
* half of the animation.
*/
private final class SwapViews implements Runnable {
private final int mPosition;
public SwapViews(int position) {
mPosition = position;
}
public void run() {
final float centerX = mContainer.getWidth() / 2.0f;
final float centerY = mContainer.getHeight() / 2.0f;
Rotate3d rotation;
if (mPosition > -1) {
imageview.setVisibility(View.VISIBLE);
imageview.requestFocus();
rotation = new Rotate3d(90, 180, centerX, centerY, 310.0f, false);
} else {
imageview.setVisibility(View.GONE);
rotation = new Rotate3d(90, 0, centerX, centerY, 310.0f, false);
}
rotation.setDuration(500);
rotation.setFillAfter(true);
rotation.setInterpolator(new DecelerateInterpolator());
mContainer.startAnimation(rotation);
}
}
}