GridView布局，自定义适配器，水平滚动

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:gravity="center"
    android:orientation="vertical" >
    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="70dp"
        android:layout_height="70dp"
         />
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="200dp"
    android:layout_gravity="center"
>
	<HorizontalScrollView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp" >

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:orientation="horizontal"
            android:layout_margin="10dp" >
    
			<GridView
		    android:id="@+id/gridView1"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content" 
			android:numColumns="auto_fit"
		    android:verticalSpacing="10dp"
			android:horizontalSpacing="10dp"	
		    >
		    </GridView>
		</LinearLayout>
    </HorizontalScrollView>
</LinearLayout>

package com.example.psq;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
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 MyGridAdapter extends BaseAdapter{

	LayoutInflater inflater = null;
	ArrayList<AppInfo> listInfo;
	public MyGridAdapter(Context context,ArrayList<AppInfo> listInfo){
		//inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		inflater = LayoutInflater.from(context);
		//this.inflater = inflater;
		this.listInfo = listInfo;
	}
	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return listInfo.size();
	}
	@Override
	public Object getItem(int index) {
		// TODO Auto-generated method stub
		return listInfo.get(index);
	}
	@Override
	public long getItemId(int index) {
		// TODO Auto-generated method stub
		return index;
	}
	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ViewHolder holder;
		if(convertView == null || convertView.getTag() == null){
			convertView = inflater.inflate(R.layout.grid_item,null);
			holder = new ViewHolder();
			holder.imageView = (ImageView)convertView.findViewById(R.id.imageView1);
			holder.textView = (TextView)convertView.findViewById(R.id.textView1);
			convertView.setTag(holder);
		}else{
			
			holder = (ViewHolder)convertView.getTag();
		}
		AppInfo appInfo = listInfo.get(position);
		holder.imageView.setImageResource(appInfo.rid);
		holder.textView.setText(appInfo.title);
		return convertView;
	}
	public class ViewHolder{
		ImageView imageView;
		TextView textView;
	}
}

package com.example.psq;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.example.psq.R;

import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
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.ListView;
import android.widget.TextView;


public class MainActivity extends Activity{

	GridView gridView;
	LayoutInflater inflater;
	ArrayList<AppInfo> listInfo;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
     
        gridView = (GridView)findViewById(R.id.gridView1);
        inflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        //inflater = LayoutInflater.from(this);
        listInfo = new ArrayList<AppInfo>();
        for(int i=0;i<15;i++){
	        AppInfo appInfo = new AppInfo();
	        appInfo.rid = R.drawable.icon001;
	        appInfo.title = "001";
	        listInfo.add(appInfo);
        }
        
        
        int size = listInfo.size();
        int length = 100;
        DisplayMetrics dm = new DisplayMetrics();
        this.getWindowManager().getDefaultDisplay().getMetrics(dm);
        float density = dm.density;
        int gridviewWidth = (int) (size * (length + 4) * density);
        int itemWidth = (int) (length * density);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                gridviewWidth, LinearLayout.LayoutParams.FILL_PARENT);
        gridView.setLayoutParams(params); // 设置GirdView布局参数,横向布局的关键
        gridView.setColumnWidth(itemWidth); // 设置列表项宽
        gridView.setHorizontalSpacing(5); // 设置列表项水平间距
        gridView.setStretchMode(GridView.NO_STRETCH);
        gridView.setNumColumns(size); // 设置列数量=列表集合数
        //gridView.setAdapter(new MyAdapter());
        gridView.setAdapter(new MyGridAdapter(this,listInfo));
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

public class AppInfo {
	public int rid;
	public String title;
}