android 拖动图片3D效果

 3D效果的相册

 

  本程序main.xml源码

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#ffffff">

<com.sx.GalleryFlow
    android:id="@+id/Gallery01"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#ffffff"> <com.sx.GalleryFlow android:id="@+id/Gallery01" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_centerInParent="true"/> </RelativeLayout>

Activity java源码

import android.app.Activity;
import android.os.Bundle;

public class ActivityMain extends Activity
{
 public void onCreate(Bundle savedInstanceState)
 {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.layout_gallery);

        Integer[] images = {
                R.drawable.img,
                R.drawable.img3,
                R.drawable.img15,
                R.drawable.img21
                };

        ImageAdapter adapter = new ImageAdapter(this, images);
        adapter.createReflectedImages();

        GalleryFlow galleryFlow = (GalleryFlow) findViewById(R.id.Gallery01);
        galleryFlow.setAdapter(adapter);
 }
}

import android.app.Activity; import android.os.Bundle; public class ActivityMain extends Activity { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.layout_gallery); Integer[] images = { R.drawable.img, R.drawable.img3, R.drawable.img15, R.drawable.img21 }; ImageAdapter adapter = new ImageAdapter(this, images); adapter.createReflectedImages(); GalleryFlow galleryFlow = (GalleryFlow) findViewById(R.id.Gallery01); galleryFlow.setAdapter(adapter); } }

ImageAdapter java源码

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.LinearGradient;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.Shader.TileMode;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

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];
     }

     public boolean createReflectedImages()
     {
         final int reflectionGap = 4;
         int index = 0;

         for (int imageId : mImageIds)
         {
             Bitmap originalImage = BitmapFactory.decodeResource(mContext.getResources(), imageId);
             int width  = originalImage.getWidth();
             int height = originalImage.getHeight();

             Matrix matrix = new Matrix();
             matrix.preScale(1, -1);

             Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height / 2, width, height / 2, matrix, false);

             Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888);

             Canvas canvas = new Canvas(bitmapWithReflection);

             canvas.drawBitmap(originalImage, 0, 0, null);

             Paint deafaultPaint = new Paint();
             canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint);

             canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

             Paint paint = new Paint();
             LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0, bitmapWithReflection.getHeight()
                                                        + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);

             paint.setShader(shader);

             paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));

             canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint);

             ImageView imageView = new ImageView(mContext);
             imageView.setImageBitmap(bitmapWithReflection);
             imageView.setLayoutParams(new GalleryFlow.LayoutParams(250, 340));
             imageView.setScaleType(ScaleType.FIT_XY);
             mImages[index++] = imageView;
         }
         return true;
     }

     private Resources getResources()
     {
         // TODO Auto-generated method stub
         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)));
     }
}

import android.content.Context; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.LinearGradient; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.PorterDuffXfermode; import android.graphics.Bitmap.Config; import android.graphics.PorterDuff.Mode; import android.graphics.Shader.TileMode; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.ImageView.ScaleType; 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]; } public boolean createReflectedImages() { final int reflectionGap = 4; int index = 0; for (int imageId : mImageIds) { Bitmap originalImage = BitmapFactory.decodeResource(mContext.getResources(), imageId); int width = originalImage.getWidth(); int height = originalImage.getHeight(); Matrix matrix = new Matrix(); matrix.preScale(1, -1); Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, height / 2, width, height / 2, matrix, false); Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888); Canvas canvas = new Canvas(bitmapWithReflection); canvas.drawBitmap(originalImage, 0, 0, null); Paint deafaultPaint = new Paint(); canvas.drawRect(0, height, width, height + reflectionGap, deafaultPaint); canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null); Paint paint = new Paint(); LinearGradient shader = new LinearGradient(0, originalImage.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); ImageView imageView = new ImageView(mContext); imageView.setImageBitmap(bitmapWithReflection); imageView.setLayoutParams(new GalleryFlow.LayoutParams(250, 340)); imageView.setScaleType(ScaleType.FIT_XY); mImages[index++] = imageView; } return true; } private Resources getResources() { // TODO Auto-generated method stub 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))); } }

GalleryFlow java源码

[html] view plain copy print ?

import android.content.Context;
import android.graphics.Camera;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.View;
import android.view.animation.Transformation;
import android.widget.Gallery;
import android.widget.ImageView;

public class GalleryFlow extends Gallery
{
    private Camera mCamera = new Camera();
    private int mMaxRotationAngle = 60;
    private int mMaxZoom = -120;
    private int mCoveflowCenter;

    public GalleryFlow(Context context)
    {
        super(context);
        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)
    {
        return view.getLeft() + view.getWidth() / 2;
    }

    protected boolean getChildStaticTransformation(View child, Transformation t)
    {
        final int childCenter = getCenterOfView(child);
        final int childWidth = child.getWidth();
        int rotationAngle = 0;

        t.clear();
        t.setTransformationType(Transformation.TYPE_MATRIX);

        if (childCenter == mCoveflowCenter)
        {
            transformImageBitmap((ImageView) child, t, 0);
        }
        else
        {
            rotationAngle = (int) (((float) (mCoveflowCenter - childCenter) / childWidth) * 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)
    {
        mCamera.save();
        final Matrix imageMatrix = t.getMatrix();
        final int imageHeight = child.getLayoutParams().height;
        final int imageWidth = child.getLayoutParams().width;
        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();
    }
}

 

http://www.linuxidc.com/Linux/2011-08/41159p3.htm