Java Gridview onclick图像使用viewpager将imageview显示为库视图

我的应用程序将图像显示为gridview，并单击任何图像显示库视图，允许使用viewpager左右滑动。我的代码如下：

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);

       // check the version of android

    if (android.os.Build.VERSION.SDK_INT > 9) {
        StrictMode.ThreadPolicy policy = 
                new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
        }

     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;
      }
  }

---

我可以显示出来，但viewpager位置始终以0开头。如果我单击gridview上的第二个图像并使用viewpager显示它，如何允许向左滑动以显示第一个图像。

如果您正在启动viewpager的新活动，请从gridview获取所选图像的位置并将其传递给该活动。然后您可以在查看页面中设置所选图像，如

pager.setCurrentItem(currentid); // here current id is the position of selected image.

---

你解决了我的问题。谢谢当我尝试左右滑动时，我面临另一个问题，就像延迟/挂起一段时间一样，只加载图像。有什么想法吗？你在使用图像缓存吗？为了避免这种延迟，你必须有效地处理位图；HttpURLConnection connection=（HttpURLConnection）url.openConnection（）；connection.setDoInput（true）；connection.connect（）；InputStream输入=连接。getInputStream（）；位图myBitmap=BitmapFactory.decodeStream（输入）看看这个库-它是一个非常棒的库，可以缓存来自web的图像并有效地处理它们。