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); } } |
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); } |
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 > |
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 > |
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); } |
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 ; } } }; |
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。