GridView使用示例(二)

mainActivity如下:

package cn.c;

import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.ImageView;
/**
 * 需求描述:
 * 自定义GridView的Adapter展示图片
 *
 * 注意:去掉GridView点击时的背景色
 * android:listSelector="@android:color/transparent"
 */
public class MainActivity extends Activity {
    private GridView mGridView;
    private ArrayList<RowImages> mArrayList;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        init();
    }
   private void init(){
	   mGridView=(GridView) findViewById(R.id.gridView);
	   mArrayList=new ArrayList<RowImages>();
	   for (int i = 0; i < 10; i++) {
		    RowImages images=new RowImages(R.drawable.a, R.drawable.b, R.drawable.a);
		    mArrayList.add(images);
    	}
	   GridViewAdapter adapter=new GridViewAdapter(MainActivity.this, mArrayList);
	   mGridView.setAdapter(adapter);
	   mGridView.setOnItemClickListener(new ItemClickListenerImpl());
    }
   private class ItemClickListenerImpl implements OnItemClickListener{
	public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
		System.out.println("点击了第"+(position+1)+"行");
		ImageView imageView_left=(ImageView) view.findViewById(R.id.imageView_left);
		imageView_left.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
               System.out.println("xxxxxx 点击了左边的图片");
			}
		});
		ImageView imageView_center=(ImageView) view.findViewById(R.id.imageView_center);
		imageView_center.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
               System.out.println("xxxxxx 点击了中间的图片");
			}
		});
		ImageView imageView_right=(ImageView) view.findViewById(R.id.imageView_right);
		imageView_right.setOnClickListener(new OnClickListener() {
			public void onClick(View v) {
               System.out.println("xxxxxx 点击了右边的图片");
			}
		});
	}

   }
}

GridViewAdapter如下:

package cn.c;

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;

public class GridViewAdapter extends BaseAdapter{
    private Context mContext;
    private ArrayList<RowImages> mArrayList;

	public GridViewAdapter(Context context,ArrayList<RowImages> arrayList){
		this.mContext=context;
		this.mArrayList=arrayList;
	}
	public int getCount() {
		if (mArrayList==null) {
			return 0;
		} else {
			return mArrayList.size();
		}

	}

	public Object getItem(int position) {
		if (mArrayList==null) {
			return null;
		} else {
            return mArrayList.get(position);
		}
	}

	public long getItemId(int position) {
		return position;
	}

	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder holder=null;
		if (convertView==null) {
			holder=new ViewHolder();
			convertView=LayoutInflater.from(mContext)
			.inflate(R.layout.gridview_row_layout, null,false);
			holder.imageView_left=
			(ImageView) convertView.findViewById(R.id.imageView_left);
			holder.imageView_center=
			(ImageView) convertView.findViewById(R.id.imageView_center);
			holder.imageView_right=
			(ImageView) convertView.findViewById(R.id.imageView_right);
			convertView.setTag(holder);
		 } else {
           holder=(ViewHolder) convertView.getTag();
		 }

		if (mArrayList!=null) {
			RowImages images=this.mArrayList.get(position);
			if (holder.imageView_left!=null) {
				holder.imageView_left.setImageResource(images.getImg_left());
			}
			if (holder.imageView_center!=null) {
				holder.imageView_center.setImageResource(images.getImg_center());
			}
			if (holder.imageView_right!=null) {
				holder.imageView_right.setImageResource(images.getImg_right());
			}
		}

		return convertView;
	}

	private class ViewHolder{
		ImageView imageView_left;
		ImageView imageView_center;
		ImageView imageView_right;
	}

}

RowImages如下:

package cn.c;

public class RowImages {
	private int img_left;
	private int img_center;
	private int img_right;

	public RowImages() {
		super();
	}

	public RowImages(int img_left, int img_center, int img_right) {
		super();
		this.img_left = img_left;
		this.img_center = img_center;
		this.img_right = img_right;
	}

	public int getImg_left() {
		return img_left;
	}
	public void setImg_left(int img_left) {
		this.img_left = img_left;
	}
	public int getImg_center() {
		return img_center;
	}
	public void setImg_center(int img_center) {
		this.img_center = img_center;
	}
	public int getImg_right() {
		return img_right;
	}
	public void setImg_right(int img_right) {
		this.img_right = img_right;
	}

}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

   <GridView
       android:id="@+id/gridView"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:verticalSpacing="10dip"
       android:listSelector="@android:color/transparent"
    />

</RelativeLayout>

gridview_row_layout.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" >
    <ImageView
        android:id="@+id/imageView_left"
        android:layout_width="80dip"
        android:layout_height="80dip"
        android:src="@drawable/ic_launcher"
        android:layout_alignParentLeft="true"
    />
    <ImageView
        android:id="@+id/imageView_center"
        android:layout_width="80dip"
        android:layout_height="80dip"
        android:src="@drawable/ic_launcher"
        android:layout_centerHorizontal="true"
    />
    <ImageView
        android:id="@+id/imageView_right"
        android:layout_width="80dip"
        android:layout_height="80dip"
        android:src="@drawable/ic_launcher"
        android:layout_alignParentRight="true"
    />

</RelativeLayout>