Android Gallery的使用

Gallery拖动效果的使用：

<?xml version="1.0" encoding="utf-8"?>
<Gallery xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/Gallery"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content">
</Gallery>

package com.Aina.Android;

import android.content.Context;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class ImageAdapter extends BaseAdapter {

	private Context mContext;
	private Integer[] mImageIds = {
			R.drawable.img1,
			R.drawable.img2,
			R.drawable.img3,
			R.drawable.img4,
			R.drawable.img5,
			R.drawable.img6,
			R.drawable.img7,
			R.drawable.img8
	};
	public ImageAdapter(Context c){
		this.mContext = c;
	}
	@Override
	public int getCount() {
		return mImageIds.length;//获取图片的个数
	}

	@Override
	public Object getItem(int position) {
		return position;//获取图片在库中的位置
	}

	@Override
	public long getItemId(int position) {
		return position;//获取图片在库中的位置
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		Log.i("TAG", position+"");
		ImageView imageView = new ImageView(mContext);
		imageView.setImageResource(mImageIds[position]);
		imageView.setLayoutParams(new Gallery.LayoutParams(100,100));//设置图片大小
		imageView.setScaleType(ImageView.ScaleType.FIT_CENTER);//设置显示比例类型
		return imageView;
	}

}

package com.Aina.Android;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Gallery;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class Test_Gallery extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Gallery g = (Gallery) this.findViewById(R.id.Gallery);
        g.setAdapter(new ImageAdapter(this));
        g.setBackgroundResource(R.drawable.bg0);
        g.setOnItemClickListener(new OnItemClickListener(){

			@Override
			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
					long arg3) {
				Toast.makeText(Test_Gallery.this, "选择了"+(arg2+1)+"号图片", Toast.LENGTH_SHORT).show();
			}

        });
    }
}