Android使用Gridview单行横向滚动显示

package com.example.scrollgridview;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends Activity {

  private GridView gridview;
  private int imgs[]={R.drawable.remote_tv_0,
      R.drawable.remote_tv_1,R.drawable.remote_tv_2,
      R.drawable.remote_tv_3,R.drawable.remote_tv_4,
      R.drawable.remote_tv_5,R.drawable.remote_tv_6,
      R.drawable.remote_tv_7,R.drawable.remote_tv_8,
      R.drawable.remote_tv_9};
  private GridviewAdapter adapter;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    gridview = (GridView)findViewById(R.id.test_gridview);
    adapter = new GridviewAdapter();

    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);
    float density = dm.density;
    int size = imgs.length;//要显示数据的个数
    //gridview的layout_widht,要比每个item的宽度多出2个像素，解决不能完全显示item的问题
    int allWidth = (int) (82 * size * density);
    //int allWidth = (int) ((width / 3 ) * size + (size-1)*3);//也可以这样使用，item的总的width加上horizontalspacing
    int itemWidth = (int) (80 * density);//每个item宽度
    LinearLayout.LayoutParams params = new     
    LinearLayout.LayoutParams(allWidth,LinearLayout.LayoutParams.MATCH_PARENT);
    gridview.setLayoutParams(params);
    gridview.setColumnWidth(itemWidth);
    gridview.setHorizontalSpacing(3);
    gridview.setStretchMode(GridView.NO_STRETCH);
    gridview.setNumColumns(size);

    gridview.setAdapter(adapter);
    adapter.setindex(0);
    adapter.notifyDataSetChanged();

    gridview.setOnItemClickListener(new OnItemClickListener() {

      @Override
      public void onItemClick(AdapterView parent, View view,
          int position, long id) {
        // TODO Auto-generated method stub
        adapter.setindex(position);
        adapter.notifyDataSetChanged();
      }
    });
  }

  class GridviewAdapter extends BaseAdapter{
    private int index = 0;
    @Override
    public int getCount() {
      // TODO Auto-generated method stub
      return imgs.length;
    }

    @Override
    public Object getItem(int position) {
      // TODO Auto-generated method stub
      return imgs[position];
    }

    @Override
    public long getItemId(int position) {
      // TODO Auto-generated method stub
      return position;
    }

    public void setindex(int index){
      this.index = index;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      // TODO Auto-generated method stub
      LayoutInflater mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      ViewHolder viewHolder;
      if (convertView == null) {
        convertView = mInflater.inflate(R.layout.gridview_itme, null);
        viewHolder = new ViewHolder();
        viewHolder.img = (ImageView)convertView.findViewById(R.id.item_img);
        viewHolder.text = (TextView)convertView.findViewById(R.id.item_text);
        convertView.setTag(viewHolder);
      }else{
        viewHolder = (ViewHolder)convertView.getTag();
      }
      if(this.index == position){
        convertView.setBackgroundResource(R.drawable.list_item_bg_focus);
      }
      else{
        convertView.setBackgroundResource(R.drawable.list_item_bg);
      }
      viewHolder.img.setImageResource(imgs[position]);
      viewHolder.text.setText(position+"");
      return convertView;
    }

    class ViewHolder{
      ImageView img;
      TextView text;
    }
  }

}