本文实例讲述了Android编程实现3D滑动旋转效果的方法。分享给大家供大家参考,具体如下:
这里我们通过代码实现一些滑动翻页的动画效果。
Animation实现动画有两个方式:帧动画(frame-by-frame animation)和补间动画(tweened animation)
本示例通过继承Animation自定义Rotate3D,实现3D翻页效果。效果图如下:
1、Rotate3D(Animation)
首先,自定义Animation的3D动画类Rotate3D
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public class Rotate3D extends Animation {
private float fromDegree; // 旋转起始角度
private float toDegree; // 旋转终止角度
private float mCenterX; // 旋转中心x
private float mCenterY; // 旋转中心y
private Camera mCamera;
public Rotate3D( float fromDegree, float toDegree, float centerX, float centerY) {
this .fromDegree = fromDegree;
this .toDegree = toDegree;
this .mCenterX = centerX;
this .mCenterY = centerY;
}
@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 FromDegree = fromDegree;
float degrees = FromDegree + (toDegree - fromDegree) * interpolatedTime; // 旋转角度(angle)
final float centerX = mCenterX;
final float centerY = mCenterY;
final Matrix matrix = t.getMatrix();
if (degrees <= - 76 .0f) {
degrees = - 90 .0f;
mCamera.save();
mCamera.rotateY(degrees); // 旋转
mCamera.getMatrix(matrix);
mCamera.restore();
} else if (degrees >= 76 .0f) {
degrees = 90 .0f;
mCamera.save();
mCamera.rotateY(degrees);
mCamera.getMatrix(matrix);
mCamera.restore();
} else {
mCamera.save();
mCamera.translate( 0 , 0 , centerX); // 位移x
mCamera.rotateY(degrees);
mCamera.translate( 0 , 0 , -centerX);
mCamera.getMatrix(matrix);
mCamera.restore();
}
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
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然后,实例化Rotate3D的旋转方向
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public void initAnimation() {
// 获取旋转中心
DisplayMetrics dm = new DisplayMetrics();
dm = getResources().getDisplayMetrics();
mCenterX = dm.widthPixels / 2 ;
mCenterY = dm.heightPixels / 2 ;
// 定义旋转方向
int duration = 1000 ;
lQuest1Animation = new Rotate3D( 0 , - 90 , mCenterX, mCenterY); // 下一页的【question1】旋转方向(从0度转到-90,参考系为水平方向为0度)
lQuest1Animation.setFillAfter( true );
lQuest1Animation.setDuration(duration);
lQuest2Animation = new Rotate3D( 90 , 0 , mCenterX, mCenterY); // 下一页的【question2】旋转方向(从90度转到0,参考系为水平方向为0度)(起始第一题)
lQuest2Animation.setFillAfter( true );
lQuest2Animation.setDuration(duration);
rQuest1Animation = new Rotate3D( 0 , 90 , mCenterX, mCenterY); // 上一页的【question1】旋转方向(从0度转到90,参考系为水平方向为0度)
rQuest1Animation.setFillAfter( true );
rQuest1Animation.setDuration(duration);
rQuest2Animation = new Rotate3D(- 90 , 0 , mCenterX, mCenterY); // 上一页的【question2】旋转方向(从-90度转到0,参考系为水平方向为0度)
rQuest2Animation.setFillAfter( true );
rQuest2Animation.setDuration(duration);
}
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2、Activity
首先,定义两个布局文件,用于旋转的画面切换
main.xml
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:id = "@+id/layout_main"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content" android:orientation = "vertical" >
...
</ LinearLayout >
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next.xml
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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:id = "@+id/layout_next"
android:layout_width = "fill_parent"
android:layout_height = "wrap_content" android:orientation = "vertical" >
...
</ LinearLayout >
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限于篇幅,完整布局文件请详见源码 ^_^
然后,初始化两个旋转的布局文件资源
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private void initMain(){
setContentView(R.layout.main);
layoutmain = (LinearLayout)findViewById(R.id.layout_main);
btn_MainLast = (Button)findViewById(R.id.main_last);
btn_MainNext = (Button)findViewById(R.id.main_next);
btn_MainLast.setOnClickListener(listener);
btn_MainNext.setOnClickListener(listener);
}
private void initNext(){
setContentView(R.layout.next);
layoutnext = (LinearLayout)findViewById(R.id.layout_next);
btn_NextLast = (Button)findViewById(R.id.next_last);
btn_NextNext = (Button)findViewById(R.id.next_next);
btn_NextLast.setOnClickListener(listener);
btn_NextNext.setOnClickListener(listener);
}
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最后,设置布局文件中的按钮监听事件,响应3D旋转动画和方向
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private View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.main_last: // 上一页
layoutmain.startAnimation(lQuest1Animation); // 当前页向左旋转(0,-90)
initNext();
layoutnext.startAnimation(lQuest2Animation); // 下一页向左旋转(90, 0)
break ;
case R.id.main_next: // 下一页
layoutmain.startAnimation(rQuest1Animation); // 当前页向右旋转(0,90)
initNext();
layoutnext.startAnimation(rQuest2Animation); // 下一页向右旋转(-90, 0)
break ;
case R.id.next_last:
layoutnext.startAnimation(lQuest1Animation);
initMain();
layoutmain.startAnimation(lQuest2Animation);
break ;
case R.id.next_next:
layoutnext.startAnimation(rQuest1Animation);
initMain();
layoutmain.startAnimation(rQuest2Animation);
break ;
}
}
};
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完整实例代码代码点击此处本站下载。
希望本文所述对大家Android程序设计有所帮助。