android实现横向滑动解决Gallery从中间滑动的问题

package com.src; import java.util.ArrayList; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; public class ImageAdapter extends BaseAdapter{ private static String[] effectTitle = {"原图", "柔光", "LOMO", "复古", "古典", "黑白", "淡雅", "哥特风", "暖化", "水印", "印象"}; private static int[] effectDrawable = {R.drawable.lomoeffect_01, R.drawable.lomoeffect_02, R.drawable.lomoeffect_03, R.drawable.lomoeffect_04, R.drawable.lomoeffect_05, R.drawable.lomoeffect_06, R.drawable.lomoeffect_07, R.drawable.lomoeffect_08, R.drawable.lomoeffect_09, R.drawable.lomoeffect_10, R.drawable.lomoeffect_11}; private ArrayList<GalleryInfo> list; private LayoutInflater inflater; public ImageAdapter(Context context) { super(); list = new ArrayList<GalleryInfo>(); inflater = LayoutInflater.from(context); // 初始化数据 for (int i=0; i<effectDrawable.length; i++) { GalleryInfo info = new GalleryInfo(); info.title = effectTitle[i]; info.drawable = effectDrawable[i]; if (i ==0 ) { //默认第一项问选中 info.isSelect = true; } else { info.isSelect = false; } list.add(info); } } public int getCount() { return effectTitle.length; } public Object getItem(int position) { return position; } public long getItemId(int position) { return position; } public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = inflater.inflate(R.layout.gallery_item, null); holder = new ViewHolder(); holder.effectTitle = (TextView)convertView.findViewById(R.id.effectTitle); holder.effectDrawable = (ImageView)convertView.findViewById(R.id.effectDrawable); convertView.setTag(holder); } else { holder = (ViewHolder)convertView.getTag(); } holder.effectTitle.setText(list.get(position).title); holder.effectDrawable.setImageResource(list.get(position).drawable); if (list.get(position).isSelect) {//被选中的选项加选中的背景框 holder.effectDrawable.setBackgroundResource(R.drawable.gallery_select); }else {//未被选中的选项设置背景透明 holder.effectDrawable.setBackgroundDrawable(null); } // notifyDataSetChanged(); return convertView; } public void changeStatus(int select) { for (int i=0; i<list.size(); i++) { list.get(i).isSelect = false; } list.get(select).isSelect = true; } private class ViewHolder { TextView effectTitle; ImageView effectDrawable; } class GalleryInfo { public String title; public int drawable; public boolean isSelect; } }