Android利用Camera实现图片的旋旋动画
Android利用Camera实现图片的旋转动画
MainActivity如下:
package cc.testrotatephoto;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.app.Activity;
/**
* Demo描述:
* 利用Camera实现图片的旋转动画
*
* 注意事项:
* 1 Rotate3dAnimation在APIDemo中的位置Views/Animation/3D Transition
* 2 待有空时候再仔细研究Rotate3dAnimation
*
* 参考资料:
* 1 http://blog.csdn.net/guolin_blog/article/details/10766017
* 2 http://blog.csdn.net/mapdigit/article/details/7804654
* 3 http://wang-peng1.iteye.com/blog/572886
* Thank you very much
*/
public class MainActivity extends Activity {
private RelativeLayout mRelativeLayout;
private ImageView mImageView;
private Button mButton;
private int count=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
init();
}
private void init(){
mRelativeLayout=(RelativeLayout) findViewById(R.id.relativeLayout);
mImageView=(ImageView) findViewById(R.id.imageView);
mButton=(Button) findViewById(R.id.button);
mButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
float centerX = mRelativeLayout.getWidth() / 2f;
float centerY = mRelativeLayout.getHeight() / 2f;
// 构建3D旋转动画对象,旋转角度为0到90度
Rotate3dAnimation rotation = new Rotate3dAnimation(0, 90, centerX, centerY,310.0f, true);
// 动画持续时间500毫秒
rotation.setDuration(500);
// 动画完成后保持完成状态
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
// 设置动画的监听器
if (count%2==0) {
rotation.setAnimationListener(new RotateToTheSecondImageViewAnimationListener());
}else{
rotation.setAnimationListener(new RotateToTheFirstImageViewAnimationListener());
}
mRelativeLayout.startAnimation(rotation);
count++;
}
});
}
class RotateToTheFirstImageViewAnimationListener implements AnimationListener {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
mImageView.setImageResource(R.drawable.c);
// 获取布局的中心点位置，作为旋转的中心点
float centerX = mRelativeLayout.getWidth() / 2f;
float centerY = mRelativeLayout.getHeight() / 2f;
// 构建3D旋转动画对象,旋转角度为90到0度
Rotate3dAnimation rotation = new Rotate3dAnimation(90, 0, centerX, centerY,310.0f, false);
// 动画持续时间500毫秒
rotation.setDuration(500);
// 动画完成后保持完成状态
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
mRelativeLayout.startAnimation(rotation);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
}
class RotateToTheSecondImageViewAnimationListener implements AnimationListener {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
//动画完成后展示另外的图片
mImageView.setImageResource(R.drawable.b);
// 获取布局的中心点位置,作为旋转的中心点
float centerX = mRelativeLayout.getWidth() / 2f;
float centerY = mRelativeLayout.getHeight() / 2f;
// 构建3D旋转动画对象,旋转角度为270到360度
Rotate3dAnimation rotation = new Rotate3dAnimation(270, 360, centerX, centerY,310.0f, false);
// 动画持续时间500毫秒
rotation.setDuration(500);
// 动画完成后保持完成状态
rotation.setFillAfter(true);
rotation.setInterpolator(new AccelerateInterpolator());
mRelativeLayout.startAnimation(rotation);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
}
}
Rotate3dAnimation如下:
package cc.testrotatephoto;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.view.animation.Animation;
import android.view.animation.Transformation;
/**
* An animation that rotates the view on the Y axis between two specified angles.
* This animation also adds a translation on the Z axis (depth) to improve the effect.
*/
public class Rotate3dAnimation extends Animation {
private final float mFromDegrees;
private final float mToDegrees;
private final float mCenterX;
private final float mCenterY;
private final float mDepthZ;
private final boolean isReverse;
private Camera mCamera;
/**
* Creates a new 3D rotation on the Y axis. The rotation is defined by its
* start angle and its end angle. Both angles are in degrees. The rotation
* is performed around a center point on the 2D space, definied by a pair
* of X and Y coordinates, called centerX and centerY. When the animation
* starts, a translation on the Z axis (depth) is performed. The length
* of the translation can be specified, as well as whether the translation
* should be reversed in time.
*
* @param fromDegrees the start angle of the 3D rotation
* @param toDegrees the end angle of the 3D rotation
* @param centerX the X center of the 3D rotation
* @param centerY the Y center of the 3D rotation
* @param reverse true if the translation should be reversed, false otherwise
*/
public Rotate3dAnimation(float fromDegrees, float toDegrees,
float centerX, float centerY, float depthZ, boolean reverse) {
mFromDegrees = fromDegrees;
mToDegrees = toDegrees;
mCenterX = centerX;
mCenterY = centerY;
mDepthZ = depthZ;
isReverse = reverse;
}
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mCamera = new Camera();
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float fromDegrees = mFromDegrees;
float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
final float centerX = mCenterX;
final float centerY = mCenterY;
final Camera camera = mCamera;
final Matrix matrix = t.getMatrix();
camera.save();
if (isReverse) {
camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
} else {
camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
}
camera.rotateY(degrees);
camera.getMatrix(matrix);
camera.restore();
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
main.xml如下:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ImageView
android:id="@+id/imageView"
android:layout_width="fill_parent"
android:layout_height="350dip"
android:src="@drawable/c" />
<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/imageView"
android:layout_centerHorizontal="true"
android:layout_marginTop="30dip"
android:text="button" />
</RelativeLayout>