android实现Iphone的coverFlow图片浏览效果

package com.Gallery3D; import java.io.BufferedInputStream; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import com.Gallary3D.R; import android.content.Context; 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.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; 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 String[] mImagePaths; private Drawable m_Drawable=null; private Bitmap m_Bitmap=null; public ImageAdapter(Context c, String[] strImagePath) { mContext = c; mImagePaths = strImagePath; } // public boolean createReflectedImages() { // // // 我们想要的差距之间的省思与原始图像 // // final int reflectionGap = 4; // // int index = 0; // // for (String strPath : mImagePaths) { // // if (strPath != null && strPath.length() > 0) { // InputStream stream = null; // BitmapFactory.Options opt = null; // try { // FileInputStream inputstream = new FileInputStream(strPath); // // opt = new BitmapFactory.Options(); // opt.inSampleSize = 15; // inputstream = new FileInputStream(strPath); // stream = new BufferedInputStream(inputstream); // Bitmap originalImage = BitmapFactory.decodeStream(stream, null, opt); // inputstream.close(); // // // // // int width = originalImage.getWidth(); // // int height = originalImage.getHeight(); // // // // // 但这并不会将规模翻在Y轴上 // // Matrix matrix = new Matrix(); // // matrix.preScale(1, -1); // // // // // 创建一个位图与翻转矩阵,适用于这。 // // // 我们只需要底部一半的形象 // // Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0, // // height / 2, width, height / 2, matrix, false); // // // // // 创建一个新的位图以及相同宽度但更高的格格不入 // // // // 反射 // // Bitmap bitmapWithReflection = Bitmap.createBitmap(width, // // (height + height / 2), Config.ARGB_8888); // // // Canvas canvas = new Canvas(bitmapWithReflection); // // // 画出原始图像 // canvas.drawBitmap(originalImage, 0, 0, null); // // // 画在缝 // // 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)); // // // 画一个长方形使用油漆与我们的线性梯度 // // canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() // // + reflectionGap, paint); // // //解决图片的锯齿现象 // // BitmapDrawable bd = new BitmapDrawable(bitmapWithReflection); // // bd.setAntiAlias(true); // // ImageView imageView = new ImageView(mContext); // // //imageView.setImageBitmap(bitmapWithReflection); // // imageView.setImageDrawable(bd); // // imageView.setLayoutParams(new GalleryFlow.LayoutParams(400, 400)); // // imageView.setScaleType(ScaleType.FIT_XY); // // mImages[index++] = imageView; // // // } catch (Exception e) { // e.printStackTrace(); // } // finally { // if (stream != null) { // try { // stream.close(); // } catch (IOException e) { // e.printStackTrace(); // } // } // // opt = null; // } // } // // } // // return true; // // } public int getCount() { return mImagePaths.length; //循环播放时候使用 // return Integer.MAX_VALUE; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } class ViewHolder { ImageView imageViewShow; } public View getView(int position, View convertView, ViewGroup parent) { try{ final ViewHolder holder; if (convertView == null) { convertView = View.inflate(mContext,R.layout.gallery_item, null); holder = new ViewHolder(); holder.imageViewShow = (ImageView) convertView.findViewById(R.id.imageViewShow); } else { holder = (ViewHolder) convertView.getTag(); } holder.imageViewShow.setImageDrawable(getDrawable(position)); convertView.setTag(holder); return convertView; } catch(Exception e){ e.printStackTrace(); } return convertView; } public float getScale(boolean focused, int offset) { /* Formula: 1 / (2 ^ offset) */ return Math.max(0, 1.0f / (float) Math.pow(2, Math.abs(offset))); } private Drawable getDrawable(int intIndex){ // 我们想要的差距之间的省思与原始图像 final int reflectionGap = 10; m_Drawable = null; String strPath = mImagePaths[intIndex]; if (strPath != null && strPath.length() > 0) { InputStream stream = null; BitmapFactory.Options opt = null; try { FileInputStream inputstream = new FileInputStream(strPath); opt = new BitmapFactory.Options(); opt.inSampleSize = 15; inputstream = new FileInputStream(strPath); stream = new BufferedInputStream(inputstream); m_Bitmap = BitmapFactory.decodeStream(stream, null, opt); inputstream.close(); int width = m_Bitmap.getWidth(); int height = m_Bitmap.getHeight(); // 但这并不会将规模翻在Y轴上 Matrix matrix = new Matrix(); matrix.preScale(1, -1); // 创建一个位图与翻转矩阵,适用于这。 // 我们只需要底部一半的形象 Bitmap reflectionImage = Bitmap.createBitmap(m_Bitmap, 0, height / 2, width, height / 2, matrix, false); // 创建一个新的位图以及相同宽度但更高的格格不入 // 反射 Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height / 2), Config.ARGB_8888); Canvas canvas = new Canvas(bitmapWithReflection); // 画出原始图像 canvas.drawBitmap(m_Bitmap, 0, 0, null); // 画在缝 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, m_Bitmap .getHeight(), 0, bitmapWithReflection.getHeight() + reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); // 画一个长方形使用油漆与我们的线性梯度 canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); //解决图片的锯齿现象 BitmapDrawable bd = new BitmapDrawable(bitmapWithReflection); bd.setAntiAlias(true); m_Drawable = (Drawable)bd; } catch (Exception e) { e.printStackTrace(); } finally { if (stream != null) { try { stream.close(); } catch (IOException e) { e.printStackTrace(); } } opt = null; } } return m_Drawable; } }