程序显示图像如 gridview，点击任何图像显示 gallery view，使用 viewpager 能左右滑动。
代码如下：
public class MemorialPhotoAlbumViewpager extends FragmentActivity {
static Activity MemorialPhotoAlbumViewpagerActivity;
int positionstate = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String[] myStrings = intent.getStringArrayExtra("ArrayphotoAlbum");
int position = intent.getIntExtra("position", 0);
setContentView(R.layout.photo_album_viewpager);
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy =
new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
我能显示但是
ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);
ImagePagerAdapter adapter = new ImagePagerAdapter(myStrings,position);
viewPager.setAdapter(adapter);
}
private class ImagePagerAdapter extends PagerAdapter {
private String[] ArrayphotoAlbumb; private int positionb;
public ImagePagerAdapter(String[] myStrings, int position)
{
ArrayphotoAlbumb = myStrings;
positionb = position;
}
@Override
public int getCount() {
return ArrayphotoAlbumb.length;
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view == ((ImageView) object);
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Context context = MemorialPhotoAlbumViewpager.this;
ImageView imageView = new ImageView(context);
String test = ArrayphotoAlbumb[position];
Bitmap bimage= getBitmapFromURL(test);
imageView.setImageBitmap(bimage);
((ViewPager) container).addView(imageView, 0);
return imageView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
((ViewPager) container).removeView((ImageView) object);
}
}
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
程序现在能显示，但是 viewpager 位置总是从0开始，如果我在 gridview 上点击第二幅图像，使用 viewpager 显示，允许向左滑动来显示第一个图像。
