How to put images in a HorizontalScrollView?
I would like to download images from a URL using a ImageAdapter extending a BaseAdapter and i would like to append them to a HorizontalScrollView.
How could i go a about doing this with this code?
public class ImageAdapter extends BaseAdapter {
/** The parent context */
private Context myContext;public ImageAdapter() {
// TODO Auto-generated constructor stub
}
/** URL-Strings to some remote images. */
public String[] myRemoteImages = {imageUrl,imageUrl2,imageUrl3,imageUrl4};
/** Simple Constructor saving the 'parent' context. */
public ImageAdapter(Context c) { this.myContext = c; }
/** Returns the amount of images we have defined. */
public int getCount() {
return 10000;
}
/* Use the array-Positions as unique IDs */
public Object getItem(int position) {
return position; }
public long getItemId(int position) {
return position;
}
/** Returns a new ImageView to
* be displayed, depending on
* the position passed. */
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(this.myContext);
try {
URL aURL = new URL(myRemoteImages[position]);
URLConnection conn = aURL.openConnection();
conn.setUseCaches(true);
conn.connect();
InputStream is = conn.getInputStream();
/* Buffered is always good for a performance plus. */
BufferedInputStream bis = new BufferedInputStream(is);
/* Decode url-data to a bitmap. */
Bitmap bm = BitmapFactory.decodeStream(bis);
bis.close();
is.close();
Log.v(imageUrl, "Retrieving image");
/* Apply the Bitmap t开发者_StackOverflowo the ImageView that will be returned. */
i.setImageBitmap(bm);
} catch (IOException e) {
Log.e("DEBUGTAG", "Remtoe Image Exception", e);
/* Image should be scaled as width/height are set. */
i.setScaleType(ImageView.ScaleType.FIT_CENTER);
/* Set the Width/Height of the ImageView. */
if(Build.VERSION.SDK_INT >= 11){
i.setLayoutParams(new Gallery.LayoutParams(450, 300));
return i;
}
else{
i.setLayoutParams(new Gallery.LayoutParams(125, 125));
return i;
}
}
return i;
}
/** Returns the size (0.0f to 1.0f) of the views
* depending on the 'offset' to the center. */
public float getScale(boolean focused, int offset) {
/* Formula: 1 / (2 ^ offset) */
return Math.max(0, 1.0f / (float)Math.pow(2, Math.abs(offset)));
}
}
//Here i set the ImageAdapter to a gallery, i would like to use a HorizontalScrollView instead. How do i go about doing this?
((Gallery) findViewById(R.id.gallery))
.setAdapter(new ImageAdapter(MainMenu.this));
I would use the RealViewSwitcher control by Marc Reichelt. Have a look here, you can use it as simple as
RealViewSwitcher rvs = new RealViewSwitcher();
rvs.addView(/*your image goes here*/); // add as many images as you want like this
setContentView(rvs); //run this on your Activity or add in a layout or use however you want.
Hope that helps.
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