Gallery组件实现循环显示图像

/*让Galllery循环播放的方法

* 1.　使getCount方法返回一个很大的值。建议返回Integer.MAX_VALUE，这个值可以到达20亿多。

* 2.　在getView方法中通过取余来循环取得resIds数组中的图像资源ID。

* 3.循环Gallery参考http://blog.csdn.net/herryz/article/details/6141957

*/

并修正其中的一个bug。

直接贴代码：

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class App extends Activity {
private Integer[] imgs = {
R.drawable.photo1,
R.drawable.photo2,
R.drawable.photo3,
R.drawable.photo4,
R.drawable.photo5,
R.drawable.photo6,
R.drawable.photo7,
R.drawable.photo8
};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Gallery g = (Gallery) findViewById(R.id.gallery);
g.setAdapter(new ImageAdapter(this));
g.setOnItemClickListener(new Gallery.OnItemClickListener() {

@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Log.i("tag", "position==="+position);
}
});
}
class ImageAdapter extends BaseAdapter{
private Context context;
ImageAdapter(Context context){
this.context=context;
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return Integer.MAX_VALUE;//返回无限多个
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return imgs[position%imgs.length];//修正！
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position%imgs.length;//修正！
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
//			Log.i("tag", "position=="+getItemId(position));
ImageView iv = new ImageView(context);
iv.setImageResource(imgs[position%imgs.length]);//取余
iv.setScaleType(ImageView.ScaleType.CENTER);
iv.setLayoutParams(new Gallery.LayoutParams(150, 100));
return iv;
}
}
}

viewpager实现循环滑动（向右）

http://www.eoeandroid.com/thread-164918-1-1.html

让Android自带的Gallery实现多点缩放，拖动和边界回弹效果，效果流畅

http://www.havenliu.com/android/668.html

TestGallery.zip (1.3 MB)

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