效果图

其中 图片使用ImageView来展示

50下边其实是个文本框

变形：按钮，点击后 将图片沿着Y轴 旋转文本框 指定的角度。

实现的代码很简单：

public class Base3dImp extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.base_3d_imp); this.findViewById(R.id.btn_changeShape).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { EditText tvGress=(EditText) Base3dImp.this.findViewById(R.id.et_degress); int degress=Integer.parseInt(tvGress.getText().toString().trim()); if(degress%90==0) degress+=1; Bitmap bmp=BitmapFactory.decodeResource(getResources(),R.drawable.p1); Matrix matrix=new Matrix();System.out.println("martrix:"+matrix.toString()); Camera camera=new Camera(); camera.save(); // camera.rotateY(degress); // camera.rotateX(degress); camera.getMatrix(matrix); camera.restore();System.out.println("martrix1:"+matrix.toString()); ImageView img=(ImageView)Base3dImp.this.findViewById(R.id.iv_base_3d); int centerX=img.getWidth()/2; int centerY=img.getHeight()/2;

Bitmap bmp1=Bitmap.createBitmap(bmp,0,0,bmp.getWidth(),bmp.getHeight(),matrix,true); System.out.println("martrix1:"+matrix.toString()); img.setImageBitmap(bmp1); } }); } }

上述代码 为了便于观察你 rotateY(degress)方法旋转的实现过程,　下面将旋转动画:

先上效果图：

OpenGLActivity的代码如下：

package com.example.opengl;

import android.app.Activity; import android.content.Intent; import android.opengl.GLSurfaceView; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.view.animation.AccelerateInterpolator; import android.widget.ImageView;

import com.example.opengl.animation.Rotate3dAnimation; import com.example.opengl.render.CylinderRender; import com.example.opengl.render.HaxagonRender; import com.example.opengl.render.RotateTriangle; /** * OpenGL练习 * @author YangBaoBao * */ public class OpenGLActivity extends Activity {

private View v; private ImageView img; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); // GLSurfaceView surface=new GLSurfaceView(this); // surface.requestFocus();//获取焦点 // surface.setFocusableInTouchMode(true);//设置为可触控 // trigle(surface); // sixshape(surface); // clindershape(surface); setContentView(R.layout.activity_open_gl); v=this.findViewById(R.id.rl_main); img=(ImageView) this.findViewById(R.id.img_animation); this.findViewById(R.id.btn_startAnimation).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { applyRotation(0, 0, 360);  // // Intent i=new Intent(OpenGLActivity.this,Transition3d.class); // OpenGLActivity.this.startActivity(i); } });

// View v=null;v.set } private void trigle(GLSurfaceView surface) { RotateTriangle rtgl=new RotateTriangle(); surface.setOnTouchListener(new RotateTriangle.MyTouchListener(rtgl)); surface.setRenderer(rtgl); } private void sixshape(GLSurfaceView surface) { HaxagonRender hr=new HaxagonRender(); surface.setOnTouchListener(new HaxagonRender.MyTouchListener(hr,surface)); surface.setRenderer(hr); } private void clindershape(GLSurfaceView surface) { CylinderRender hr=new CylinderRender(); surface.setOnTouchListener(new CylinderRender.MyTouchListener(hr,surface)); surface.setRenderer(hr); } // public void staticAnimation() // { // Rotate3dAnimation ra=new Rotate3dAnimation(0, 180,img.getX()/2,img.getY()/2,310,false); // img.startAnimation(ra); // } private void applyRotation(int position, float start, float end) {  // Find the center of the container  final float centerX = img.getWidth() / 2.0f;  final float centerY = img.getHeight() / 2.0f;  // Create a new 3D rotation with the supplied parameter  // The animation listener is used to trigger the next animation  final Rotate3dAnimation rotation =  new Rotate3dAnimation(start, end, centerX, centerY, 0, true);  rotation.setDuration(5000);  rotation.setFillAfter(true);  rotation.setInterpolator(new AccelerateInterpolator());  // rotation.setAnimationListener(new DisplayNextView(position));  img.startAnimation(rotation);  }  }

Rotate3dAnimation为实现的动画类，也是很简单的：

先上效果图：

package com.example.opengl.animation;

import android.view.animation.Animation; import android.view.animation.Transformation; import android.graphics.Camera; import android.graphics.Matrix;

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 mReverse; private Camera mCamera;

public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ, boolean reverse) { mFromDegrees = fromDegrees; mToDegrees = toDegrees; mCenterX = centerX; mCenterY = centerY; mDepthZ = depthZ; mReverse = reverse; }

@Override public void initialize(int width, int height, int parentWidth, int parentHeight) { super.initialize(width, height, parentWidth, parentHeight); mCamera = new Camera(); }

/**

动画的主要实现方法

*/

@Override protected void applyTransformation(float interpolatedTime, Transformation t) { final float fromDegrees = mFromDegrees; float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime); System.out.println("degress:"+degrees);

System.out.println("interpolatedTime:"+((mToDegrees - fromDegrees) * interpolatedTime)); final float centerX = mCenterX; final float centerY = mCenterY; final Camera camera = mCamera;

final Matrix matrix = t.getMatrix();

camera.save(); if (mReverse) { camera.translate(0.0f, 0.0f,mDepthZ * interpolatedTime);//mDepthZ * interpolatedTime+100 } else { camera.translate(0.0f, 0.0f, mDepthZ* (1.0f - interpolatedTime));//mDepthZ * (1.0f - interpolatedTime)+100 } camera.rotateY(degrees); camera.getMatrix(matrix); camera.restore();

matrix.preTranslate(-centerX, -centerY); matrix.postTranslate(centerX, centerY); }