Android - ViewPager实现Gallery效果

RelativeLayout viewPagerContainer = (RelativeLayout) headerView.findViewById(R.id.content_pager_layout);

        imgPager = (ViewPagerFixed) headerView.findViewById(R.id.content_VP);

        imgPager.setPageMargin(10);

        pagerAdapter = new MyPagerAdapter();

            pagerAdapter.setFileList(mImages);

        imgPager.setAdapter(pagerAdapter);

        imgPager.setOnPageChangeListener(new MyOnPageChangeListener(viewPagerContainer));



        viewPagerContainer.setOnTouchListener(new OnTouchListener() {



            @Override

            public boolean onTouch(View v, MotionEvent event) {

                // dispatch the events to the ViewPager, to solve the problem that we can swipe only the middle view.

                return imgPager.dispatchTouchEvent(event);

            }

        });

public class MyOnPageChangeListener implements OnPageChangeListener {

        private RelativeLayout viewPagerContainer;



        public MyOnPageChangeListener(RelativeLayout viewPagerContainer) {

            this.viewPagerContainer = viewPagerContainer;

        }



        @Override

        public void onPageSelected(int position) {

        }



        @Override

        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

            if (viewPagerContainer != null) {

                viewPagerContainer.invalidate();

            }

        }



        @Override

        public void onPageScrollStateChanged(int arg0) {

        }



    }

class MyPagerAdapter extends PagerAdapter {/**刷新视图**/

        public void setFileList(List<File> imgs) {

            this.imgFile = imgs;

            notifyDataSetChanged();

        }



        /**刷新视图**/

        public void setList(List<img> row) {

            this.imgList = row;

            notifyDataSetChanged();

        }



        @Override

        public int getCount() {

            return size;

        }



        @Override

        public boolean isViewFromObject(View view, Object object) {

            return (view == object);

        }



        @Override

        public Object instantiateItem(ViewGroup container, int position) {

            final ImageView imageView = new ImageView(mActivity);

            imageView.setBackgroundColor(Color.LTGRAY);

            imageView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

     　　　　imageView.setTag(imageUrl);

            imageView.setImageBitmap(loadedImage);

            ((ViewPager) container).addView(imageView, 0);

            return imageView;



        }



        @Override

        public void destroyItem(ViewGroup container, int position, Object object) {

            ((ViewPager) container).removeView((ImageView) object);

        }

    }

<RelativeLayout

        android:id="@+id/content_pager_layout"

        android:layout_width="match_parent"

        android:layout_height="365dp"

        android:clipChildren="false"

        android:layerType="software" >



        <com.dotfive.chuanbang.layout.ViewPagerFixed

            android:id="@+id/content_VP"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:layout_gravity="center"

            android:layout_margin="15dp"

            android:clipChildren="false"

            android:gravity="center" />

    </RelativeLayout>