imageswitcher+gallay实现相册功能

说明：
使用ImageSwitcher控件+gallary控件可以实现点击下方gallary控件更换上面imageswitcher控件图片展示的功能。

代码演示：
public class mainactivity extends Activity implements
  OnItemSelectedListener, ViewFactory {
 private ImageSwitcher is;
 private Gallery gallery;


 private Integer[] mThumbIds = { R.drawable.b, R.drawable.c,
   R.drawable.d, R.drawable.f, R.drawable.g,
   };


 private Integer[] mImageIds = { R.drawable.b, R.drawable.c,
   R.drawable.d, R.drawable.f, R.drawable.g, };


@Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  requestWindowFeature(Window.FEATURE_NO_TITLE);
  setContentView(R.layout.main);


  is = (ImageSwitcher) findViewById(R.id.switcher);
  is.setFactory(this);


  is.setInAnimation(AnimationUtils.loadAnimation(this,
    android.R.anim.fade_in));
  is.setOutAnimation(AnimationUtils.loadAnimation(this,
    android.R.anim.fade_out));


  gallery = (Gallery) findViewById(R.id.gallery);


  gallery.setAdapter(new ImageAdapter(this));
  gallery.setOnItemSelectedListener(this);
 }


 @Override
 public View makeView() {
  ImageView i = new ImageView(this);
  i.setBackgroundColor(0xFF000000);
  i.setScaleType(ImageView.ScaleType.FIT_CENTER);
  i.setLayoutParams(new ImageSwitcher.LayoutParams(
    LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
  return i;
 }


 public class ImageAdapter extends BaseAdapter {
  public ImageAdapter(Context c) {
   mContext = c;
  }


  public int getCount() {
   return mThumbIds.length;
  }


  public Object getItem(int position) {
   return position;
  }


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


  public View getView(int position, View convertView, ViewGroup parent) {
   ImageView i = new ImageView(mContext);


   i.setImageResource(mThumbIds[position]);
   i.setAdjustViewBounds(true);
   i.setLayoutParams(new Gallery.LayoutParams(
     LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
   i.setBackgroundResource(R.drawable.e);
   return i;
  }


  private Context mContext;


 }


 @Override
 public void onItemSelected(AdapterView<?> parent, View view, int position,
   long id) {
  is.setImageResource(mImageIds[position]);


 }


 @Override
 public void onNothingSelected(AdapterView<?> parent) {
 }
}




<?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="match_parent"> 
    
    <ImageSwitcher android:id="@+id/switcher"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
    />
    
    <Gallery android:id="@+id/gallery"
        android:background="#55000000"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        
        android:gravity="center_vertical"
        android:spacing="16dp"
    />
</RelativeLayout>