Android Gallery3D效果 代码
  效果图:

Android Gallery3D效果 教程 案例 代码_android开发

  贴上代码:

1.扩展Gallery:    public class GalleryFlow extends Gallery {    private Camera mCamera = new Camera();//相机类    private int mMaxRotationAngle = 60;//最大转动角度    private int mMaxZoom = -300;////最大缩放值    private int mCoveflowCenter;//半径值    public GalleryFlow(Context context) {    super(context);    //支持转换 ,执行getChildStaticTransformation方法    this.setStaticTransformationsEnabled(true);    }    public GalleryFlow(Context context, AttributeSet attrs) {    super(context, attrs);    this.setStaticTransformationsEnabled(true);    }    public GalleryFlow(Context context, AttributeSet attrs, int defStyle) {    super(context, attrs, defStyle);    this.setStaticTransformationsEnabled(true);    }    public int getMaxRotationAngle() {    return mMaxRotationAngle;    }    public void setMaxRotationAngle(int maxRotationAngle) {    mMaxRotationAngle = maxRotationAngle;    }    public int getMaxZoom() {    return mMaxZoom;    }    public void setMaxZoom(int maxZoom) {    mMaxZoom = maxZoom;    }    private int getCenterOfCoverflow() {    return (getWidth() - getPaddingLeft() - getPaddingRight()) / 2    + getPaddingLeft();    }    private static int getCenterOfView(View view) {    System.out.println("view left :"+view.getLeft());    System.out.println("view width :"+view.getWidth());    return view.getLeft() + view.getWidth() / 2;    }    //控制gallery中每个图片的旋转(重写的gallery中方法)    protected boolean getChildStaticTransformation(View child, Transformation t) {    //取得当前子view的半径值    final int childCenter = getCenterOfView(child);    System.out.println("childCenter:"+childCenter);    final int childWidth = child.getWidth();    //旋转角度    int rotationAngle = 0;    //重置转换状态    t.clear();    //设置转换类型    t.setTransformationType(Transformation.TYPE_MATRIX);    //如果图片位于中心位置不需要进行旋转    if (childCenter == mCoveflowCenter) {    transformImageBitmap((ImageView) child, t, 0);    } else {    //根据图片在gallery中的位置来计算图片的旋转角度    rotationAngle = (int) (((float) (mCoveflowCenter - childCenter) / childWidth) * mMaxRotationAngle);    System.out.println("rotationAngle:" +rotationAngle);    //如果旋转角度绝对值大于最大旋转角度返回(-mMaxRotationAngle或mMaxRotationAngle;)    if (Math.abs(rotationAngle) > mMaxRotationAngle) {    rotationAngle = (rotationAngle < 0) ? -mMaxRotationAngle : mMaxRotationAngle;    }    transformImageBitmap((ImageView) child, t, rotationAngle);    }    return true;    }    protected void onSizeChanged(int w, int h, int oldw, int oldh) {    mCoveflowCenter = getCenterOfCoverflow();    super.onSizeChanged(w, h, oldw, oldh);    }    private void transformImageBitmap(ImageView child, Transformation t,    int rotationAngle) {    //对效果进行保存    mCamera.save();    final Matrix imageMatrix = t.getMatrix();    //图片高度    final int imageHeight = child.getLayoutParams().height;    //图片宽度    final int imageWidth = child.getLayoutParams().width;    //返回旋转角度的绝对值    final int rotation = Math.abs(rotationAngle);    // 在Z轴上正向移动camera的视角,实际效果为放大图片.    // 如果在Y轴上移动,则图片上下移动;X轴上对应图片左右移动.    mCamera.translate(0.0f, 0.0f, 100.0f);    // As the angle of the view gets less, zoom in    if (rotation < mMaxRotationAngle) {    float zoomAmount = (float) (mMaxZoom + (rotation * 1.5));    mCamera.translate(0.0f, 0.0f, zoomAmount);    }    // 在Y轴上旋转,对应图片竖向向里翻转.    // 如果在X轴上旋转,则对应图片横向向里翻转.    mCamera.rotateY(rotationAngle);    mCamera.getMatrix(imageMatrix);    imageMatrix.preTranslate(-(imageWidth / 2), -(imageHeight / 2));    imageMatrix.postTranslate((imageWidth / 2), (imageHeight / 2));    mCamera.restore();    }    }  

 

  2.填充图片容器(BaseAdapter):

public class ImageAdapter extends BaseAdapter {    int mGalleryItemBackground;    private Context mContext;    private Integer[] mImageIds;    private ImageView[] mImages;    public ImageAdapter(Context c, Integer[] ImageIds) {    mContext = c;    mImageIds = ImageIds;    mImages = new ImageView[mImageIds.length];    }    /**    * 创建倒影效果    * @return    */    public boolean createReflectedImages() {    //倒影图和原图之间的距离    final int reflectionGap = 4;    int index = 0;    for (int imageId : mImageIds) {    //返回原图解码之后的bitmap对象    Bitmap originalImage = BitmapFactory.decodeResource(mContext.getResources(), imageId);    int width = originalImage.getWidth();    int height = originalImage.getHeight();    //创建矩阵对象    Matrix matrix = new Matrix();    //指定一个角度以0,0为坐标进行旋转    // matrix.setRotate(30);    //指定矩阵(x轴不变,y轴相反)    matrix.preScale(1, -1);    //将矩阵应用到该原图之中,返回一个宽度不变,高度为原图1/2的倒影位图    Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,    height/2, width, height/2, matrix, false);    //创建一个宽度不变,高度为原图+倒影图高度的位图    Bitmap bitmapWithReflection = Bitmap.createBitmap(width,    (height + height / 2), Config.ARGB_8888);    //将上面创建的位图初始化到画布    Canvas canvas = new Canvas(bitmapWithReflection);    canvas.drawBitmap(originalImage, 0, 0, null);    Paint deafaultPaint = new Paint();    deafaultPaint.setAntiAlias(false);    //    canvas.drawRect(0, height, width, height + reflectionGap,deafaultPaint);    canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);    Paint paint = new Paint();    paint.setAntiAlias(false);    /**    * 参数一:为渐变起初点坐标x位置,    * 参数二:为y轴位置,    * 参数三和四:分辨对应渐变终点,    * 最后参数为平铺方式,    * 这里设置为镜像Gradient是基于Shader类,所以我们通过Paint的setShader方法来设置这个渐变    */    LinearGradient shader = new LinearGradient(0,originalImage.getHeight(), 0,    bitmapWithReflection.getHeight() + reflectionGap,0x70ffffff, 0x00ffffff, TileMode.MIRROR);    //设置阴影    paint.setShader(shader);    paint.setXfermode(new PorterDuffXfermode(android.graphics.PorterDuff.Mode.DST_IN));    //用已经定义好的画笔构建一个矩形阴影渐变效果    canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()+ reflectionGap, paint);    //创建一个ImageView用来显示已经画好的bitmapWithReflection    ImageView imageView = new ImageView(mContext);    imageView.setImageBitmap(bitmapWithReflection);    //设置imageView大小 ,也就是最终显示的图片大小    imageView.setLayoutParams(new GalleryFlow.LayoutParams(300, 400));    //imageView.setScaleType(ScaleType.MATRIX);    mImages[index++] = imageView;    }    return true;    }    @SuppressWarnings("unused")    private Resources getResources() {    return null;    }    public int getCount() {    return mImageIds.length;    }    public Object getItem(int position) {    return position;    }    public long getItemId(int position) {    return position;    }    public View getView(int position, View convertView, ViewGroup parent) {    return mImages[position];    }    public float getScale(boolean focused, int offset) {    return Math.max(0, 1.0f / (float) Math.pow(2, Math.abs(offset)));    }    }  

 

  3.创建Activity:

 public class Gallery3DActivity extends Activity {    public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.layout_gallery);    Integer[] images = { R.drawable.img0001, R.drawable.img0030,    R.drawable.img0100, R.drawable.img0130, R.drawable.img0200,    R.drawable.img0230,  R.drawable.img0330,R.drawable.img0354 };    ImageAdapter adapter = new ImageAdapter(this, images);    adapter.createReflectedImages();//创建倒影效果    GalleryFlow galleryFlow = (GalleryFlow) this.findViewById(R.id.Gallery01);    galleryFlow.setFadingEdgeLength(0);    galleryFlow.setSpacing(-100); //图片之间的间距    galleryFlow.setAdapter(adapter);    galleryFlow.setOnItemClickListener(new OnItemClickListener() {    public void onItemClick(AdapterView<?> parent, View view,    int position, long id) {    Toast.makeText(getApplicationContext(), String.valueOf(position), Toast.LENGTH_SHORT).show();    }    });    galleryFlow.setSelection(4);    }    }