在ANDROID中實現3D旋轉直接使用animation配合camera就可以實現，在apidemo裏就有這樣的實例 我們首先做一個繼承animation的類Rotate3d.java 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 public class Rotate3d extends Animation { private float mFromDegree; private float mToDegree; private float mCenterX; private float mCenterY; private float mLeft; private float mTop; private Camera mCamera; private static final String TAG = "Rotate3d"; public Rotate3d(float fromDegree, float toDegree, float left, float top, float centerX, float centerY) { this.mFromDegree = fromDegree; this.mToDegree = toDegree; this.mLeft = left; this.mTop = top; 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 = mFromDegree; float degrees = FromDegree + (mToDegree - mFromDegree) * interpolatedTime; 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); 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(); //這裏很重要哦。 mCamera.translate(0, 0, centerX); mCamera.rotateY(degrees); mCamera.translate(0, 0, -centerX); mCamera.getMatrix(matrix); mCamera.restore(); } matrix.preTranslate(-centerX, -centerY); matrix.postTranslate(centerX, centerY); } } public class Rotate3d extends Animation { private float mFromDegree; private float mToDegree; private float mCenterX; private float mCenterY; private float mLeft; private float mTop; private Camera mCamera; private static final String TAG = "Rotate3d"; public Rotate3d(float fromDegree, float toDegree, float left, float top, float centerX, float centerY) { this.mFromDegree = fromDegree; this.mToDegree = toDegree; this.mLeft = left; this.mTop = top; 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 = mFromDegree; float degrees = FromDegree + (mToDegree - mFromDegree) * interpolatedTime; 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); 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(); //這裏很重要哦。 mCamera.translate(0, 0, centerX); mCamera.rotateY(degrees); mCamera.translate(0, 0, -centerX); mCamera.getMatrix(matrix); mCamera.restore(); } matrix.preTranslate(-centerX, -centerY); matrix.postTranslate(centerX, centerY); } } 有了這個類一切都會變得簡單的，接着只要在activity中寫兩個Rotate3d的對象，讓兩個view,分別做這兩個對象的animation就好了; 1 2 3 4 5 6 7 8 9 10 11 //下面兩句很關鍵哦， Rotate3d leftAnimation = new Rotate3d(-0, -90, 0, 0, mCenterX, mCenterY); Rotate3d rightAnimation = new Rotate3d(-0+90, -90+90, 0.0f, 0.0f, mCenterX, mCenterY); leftAnimation.setFillAfter(true); leftAnimation.setDuration(1000); rightAnimation.setFillAfter(true); rightAnimation.setDuration(1000); mImageView1.startAnimation(leftAnimation); mImageView2.startAnimation(rightAnimation); 最後就是還要寫一下mImageView1,mImageView2的xml, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29
