sliding between images android

Question

I am relatively new to Android Animation and Gestures.

I have 15 images that I want to slide around. Only one image shows up on the screen at a time and when I slide L->R on the first image, the 2nd image shows up and so on - like a slideshow. I looked at the Android Gallery tutorial but I don't want the thumbnails to be shown. My understanding is to use an ImageView and keep changing the images. Is this the right way or is there a better approach to this?

Answer 1

That way you wont see the fling efect.

there is one way of doing that with the gallery.

clreate the galery like this:

<Gallery xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:id="@+id/HorizontalGallery"
    android:gravity="center_vertical" android:spacing="2px"/>

on the getview you have to:

public View getView(int position, View convertView, ViewGroup parent) {

ImageView i = new ImageView(_Context);

i.setImageResource(R.drawable.YourPicture);
i.setLayoutParams(new Gallery.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT));

//setting the scale:

int viewWidthtmp;
int viewHeighttmp;

if(getHeight() == 0)
{
    if(_horizGallery.getWidth() == 0){
        viewWidthtmp = _horizGallery.getWidth();
        viewHeighttmp = _horizGallery.getHeight();
    }
    else
    {
        viewWidthtmp = _screenWidth;
        viewHeighttmp = _screenHeight;
    }

//getting the size of the image.
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true; //returns null, but fills the out methods
bm = BitmapFactory.decodeResource(getResources(), R.drawable.YourPicture, o);
if(o.outHeight> viewHeight || o.outWidth> viewWidth) 
   {i.setScaleType(ImageView.ScaleType.CENTER_INSIDE);}
else
   {i.setScaleType(ImageView.ScaleType.FIT_CENTER);}

//DO NOT ADD the line below
//i.setBackgroundResource(mGalleryItemBackground);

return i;

}

You also have to declare 2 global variables variables and initialize them in the OnCreate of the activity.

public class ScrollingGallery extends Activity
{
    private int _screenWidth;
    private int _screenHeight;


...

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.scrollingallery);

        Display display = getWindowManager().getDefaultDisplay(); 
        _screenWidth = display.getWidth();
        _screenHeight = display.getHeight();

...

After that you just have to mak the gallery scroll with a timer.

if I'm not mistaken, this should work wth a full page gallery. Code is a little long and i just wrote it so might have a bug.