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今天要给大家介绍的是怎样实现可旋转的汽车3D模型。
先看实现效果
这仅仅是静态图,实际上,这个模型是能够依据手势进行旋转的,效果还能够。
以下我说一下实现的原理。首先,这样的3D模型的旋转效果是通过切换不同的图片完毕的,在这个样例中,一共同拥有52张图片,展示了360度的旋转效果,差点儿相同每6度一张照片。然后,我们仅仅须要监听盛放图片的ImageView的onTouch事件,完毕图片的切换就能够实现这样的效果。
以下是几张图片的样例
以下,看一下代码实现
package com.example.car3d; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.ImageView; /** * * @ClassName: com.example.car3d.MainActivity * @Description: 3D汽车模型 * @author zhaokaiqiang * @date 2014-10-31 上午8:51:59 * */ public class MainActivity extends Activity { protected static final String TAG = "MainActivity"; // 当前显示的bitmap对象 private static Bitmap bitmap; // 图片容器 private ImageView imageView; // 開始按下位置 private int startX; // 当前位置 private int currentX; // 当前图片的编号 private int scrNum; // 图片的总数 private static int maxNum = 52; // 资源图片集合 private int[] srcs = new int[] { R.drawable.p1, R.drawable.p2, R.drawable.p3, R.drawable.p4, R.drawable.p5, R.drawable.p6, R.drawable.p7, R.drawable.p8, R.drawable.p9, R.drawable.p10, R.drawable.p11, R.drawable.p12, R.drawable.p13, R.drawable.p14, R.drawable.p15, R.drawable.p16, R.drawable.p17, R.drawable.p18, R.drawable.p19, R.drawable.p20, R.drawable.p21, R.drawable.p22, R.drawable.p23, R.drawable.p24, R.drawable.p25, R.drawable.p26, R.drawable.p27, R.drawable.p28, R.drawable.p29, R.drawable.p30, R.drawable.p31, R.drawable.p32, R.drawable.p33, R.drawable.p34, R.drawable.p35, R.drawable.p36, R.drawable.p37, R.drawable.p38, R.drawable.p39, R.drawable.p40, R.drawable.p41, R.drawable.p42, R.drawable.p43, R.drawable.p44, R.drawable.p45, R.drawable.p46, R.drawable.p47, R.drawable.p48, R.drawable.p49, R.drawable.p50, R.drawable.p51, R.drawable.p52 }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); imageView = (ImageView) findViewById(R.id.imageView); // 初始化当前显示图片编号 scrNum = 1; imageView.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: startX = (int) event.getX(); break; case MotionEvent.ACTION_MOVE: currentX = (int) event.getX(); // 推断手势滑动方向,并切换图片 if (currentX - startX > 10) { modifySrcR(); } else if (currentX - startX < -10) { modifySrcL(); } // 重置起始位置 startX = (int) event.getX(); break; } return true; } }); } // 向右滑动改动资源 private void modifySrcR() { if (scrNum > maxNum) { scrNum = 1; } if (scrNum > 0) { bitmap = BitmapFactory.decodeResource(getResources(), srcs[scrNum - 1]); imageView.setImageBitmap(bitmap); scrNum++; } } // 向左滑动改动资源 private void modifySrcL() { if (scrNum <= 0) { scrNum = maxNum; } if (scrNum <= maxNum) { bitmap = BitmapFactory.decodeResource(getResources(), srcs[scrNum - 1]); imageView.setImageBitmap(bitmap); scrNum--; } } }
下载项目请到https://github.com/ZhaoKaiQiang/car3d