使用示图显示图片

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本例先介绍使用Gallery和ImageView实现

package com.example.mygallery;

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.content.res.TypedArray;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {
	Integer[] imageIDs = {
			R.drawable.pic1,
			R.drawable.pic2,
			R.drawable.pic3,
			R.drawable.pic4,
			R.drawable.pic5,
			R.drawable.pic6,
			R.drawable.pic7
	};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		Gallery gallery = (Gallery) findViewById(R.id.gallery1);
		gallery.setAdapter(new ImageAdapter(this));
		gallery.setOnItemClickListener(new OnItemClickListener() {

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				// TODO Auto-generated method stub
				Toast.makeText(getBaseContext(), "pic" + (arg2+1) + "selected", Toast.LENGTH_LONG).show();
				ImageView imageView = (ImageView) findViewById(R.id.image1);
				imageView.setImageResource(imageIDs[arg2]);
			}
		});
	}
	
	public class ImageAdapter extends BaseAdapter{
		Context context;
		int itemBackground;
		
		public ImageAdapter(Context c){
			context = c;
			TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
			itemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);
			a.recycle();
		}
		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return imageIDs.length;
		}

		@Override
		public Object getItem(int postion) {
			// TODO Auto-generated method stub
			return postion;
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			ImageView imageView;
			if(convertView == null){
				imageView = new ImageView(context);
				imageView.setImageResource(imageIDs[position]);
				imageView.setScaleType(ImageView.ScaleType.FIT_XY);
				imageView.setLayoutParams(new Gallery.LayoutParams(150,120));
			}else{
				imageView = (ImageView) convertView;
			}
			imageView.setBackgroundResource(itemBackground);
			return imageView;
		}
		
	}

	@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;
	}

}

主配置文件

<?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="fill_parent"
    android:orientation="vertical" >
    
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Images of Glarry"
        />
    <Gallery 
        android:id="@+id/gallery1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
    <ImageView 
        android:id="@+id/image1"
        android:layout_width="320dp"
        android:layout_height="250dp"
        android:scaleType="fitXY" />

</LinearLayout>

新建资源文件/res/values/attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="Gallery1">
        <attr name="android:galleryItemBackground" />
    </declare-styleable>
</resources>

展示效果

完整项目下载
http://pan.baidu.com/s/1CLOxo

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