小程序 炫酷相册源码.rar

package com.image.coverflow; 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 mCoverflowCenter; 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; } @Override protected boolean getChildStaticTransformation(View child, Transformation t) { // TODO Auto-generated method stub final int childCenter=getCenterOfView(child); final int childWidth=child.getWidth(); int rotationAngle=0; t.clear(); t.setTransformationType(Transformation.TYPE_MATRIX); if(childCenter==mCoverflowCenter){ transformImageBitmap((ImageView)child,t,0); }else{ rotationAngle=(int)(((float)(mCoverflowCenter-childCenter)/childWidth)*mMaxRotationAngle); if(Math.abs(rotationAngle)>mMaxRotationAngle){ rotationAngle=(rotationAngle<0)?-mMaxRotationAngle:mMaxRotationAngle; } transformImageBitmap((ImageView)child, t, rotationAngle); } return true; } 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); mCamera.translate(0.0f, 0.0f, 100.0f); if(rotation<mMaxRotationAngle){ float zoomAmount=(float)(mMaxZoom+(rotation*1.5)); mCamera.translate(0.0f, 0.0f, zoomAmount); } mCamera.rotateY(rotationAngle); mCamera.getMatrix(imageMatrix); imageMatrix.preTranslate(-(imageWidth/2), -(imageHeight/2)); imageMatrix.postTranslate((imageWidth/2), (imageHeight/2)); mCamera.restore(); } protected void onSizeChanged(int w,int h,int oldw,int oldh) { mCoverflowCenter=getCenterOfCoverflow(); super.onSizeChanged(w, h, oldw, oldh); } }