Navigate only one View by gesture on Gallery

Question

I have a Gallery that each current item matchs the display dimensions. I want when the user try to "throw" the views to any side, instead of the automatic scrolling, I want to go just to the next View.

How can I do that?

Answer 1

Check this snippet. It uses no scrolling constants, instead it relies on scolling key event to handle for different resolutions.

private boolean isScrollingLeft(MotionEvent e1, MotionEvent e2){
    return e2.getX() > e1.getX();
}

@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY){
    int kEvent;
    if(isScrollingLeft(e1, e2)){ //Check if scrolling left
        kEvent = KeyEvent.KEYCODE_DPAD_LEFT;
    }
    else{ //Otherwise scrolling right
        kEvent = KeyEvent.KEYCODE_DPAD_RIGHT;
    }
    onKeyDown(kEvent, null);
    return true;  
}

This piece of code belongs to a galleryView model which extends Gallery and its layout looks like this

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="180dp">
    <com.example.android.GalleryView
        android:id="@+id/gallery"
        android:layout_width="fill_parent"
        android:layout_height="180dp"
        android:gravity="bottom"
        android:fadingEdge="none"/>
</LinearLayout>