android画廊滚动像查看寻呼机

Question

我同时使用了 Gallery 和 ViewPager 小部件，我正在从 Web 服务获取图像， 但我无法将它们放在 ViewPager 中，但在 Gallery 中很容易。 我将本教程用于 ViewPager http://mobile.tutsplus.com/tutorials/android/android-user-interface-design-horizontal-view-paging/

我想要像 ViewPager 滚动一样滚动的 android Gallery 小部件，

这可能吗，我该怎么做。

Answer 1

这是您的 PagerAdapter 的 instantiateItem() 方法的一个简单示例，它将动态地用图像视图填充它。

@Override
public Object instantiateItem( final View pager, final int position )
{
    //Note: if you do not have a local reference to the context make one and
    //set it to the context that gets passed in to the constructor.
    //Another option might be to use pager.getContext() which is how its
    //done in the tutorial that you linked.
    ImageView mImg = new ImageView(context);

    /*Code to dynamically set your image goes here.
    Exactly what it will be is going to depend on 
    how your images are stored. 
    In this example it would be if the images
    are on the SD card and have filenames
    with incrementing numbers like: (img0.png, img1.png, img2.png etc...)*/

    Bitmap mBitmap = BitmapFactory.decodeFile(
         Environment.getExternalStorageDirectory() + "/img" + position + ".png");
    mImg.setImageBitmap(mBitmap);




    ((ViewPager) collection).addView(mImg, 0);
    return mImg;

}