在main.xml中
<?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" >
<Gallery
android:id="@+id/myGallery"
android:gravity="center_vertical"
android:spacing="3dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
新建ImageGalleryAdapter extends BaseAdapter
package com.tarena.galleryproject;
import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.Gallery.LayoutParams;
import android.widget.ImageView;
public class ImageGalleryAdapter extends BaseAdapter {
private Context context = null;
//里面的所有方法表示的是可以根据指定的显示图片的数量，进行每个图片的处理
private int[] imgRes = new int[]{
R.drawable.b,R.drawable.c,R.drawable.d,
R.drawable.e,R.drawable.f,R.drawable.g,
R.drawable.h,R.drawable.l}; //这些是所要显示的图片的资源
public ImageGalleryAdapter(Context context){
this.context = context;
}
public int getCount() { //取得要显示的内容的数量
return this.imgRes.length; //数量为资源的数量
}
public Object getItem(int position) {
return this.imgRes[position];
}
public long getItemId(int position) { //取得项的ID
return this.imgRes[position];
}
public View getView(int position, View convertView,
ViewGroup parent) { //将资源设置到一个组件之中，很明显这个组件就是ImageView组件
ImageView img = new ImageView(this.context);
img.setBackgroundColor(0xffffffff);
img.setImageResource(this.imgRes[position]); //将指定的资源设置到ImageView中
img.setScaleType(ImageView.ScaleType.CENTER); //居中显示
img.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
return img;
}
}
在MyGalleryProjectDemo.java程序中
package com.tarena.galleryproject;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Gallery;
import android.widget.Toast;
public class MyGalleryProjectDemo extends Activity {
private Gallery gallery = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.gallery = (Gallery) super.findViewById(R.id.myGallery);
this.gallery.setAdapter(new ImageGalleryAdapter(this));
this.gallery.setOnItemClickListener(new onItemClickListenerImpl());
}
private class onItemClickListenerImpl implements OnItemClickListener{
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
Toast.makeText(MyGalleryProjectDemo.this,
String.valueOf(position),
Toast.LENGTH_SHORT).show();
}
}
}