Android droidQuery Swipe Length detection

Question

I am using the droidQuery library to handle swipe events using the method

$.with(myView).swipe(new Function(...));

(see my previous post here), and I was wondering if their is a way to expand upon the answer in order to check how long the user is swiping, and react differently based on how long the down-time is. Thanks for any answers!

Answer 1

You can follow the model discussed here, with some additional code in the swipe logic. From off the linked code, we have the following switch statement:

switch(swipeDirection) {
    case DOWN :
        //TODO: Down swipe complete, so do something
        break; 
    case UP :
        //TODO: Up swipe complete, so do something
        break; 
    case LEFT :
        //TODO: Left swipe complete, so do something
        break; 
    case RIGHT :
        //TODO: Right swipe complete, so do something (such as):
        day++;
        Fragment1 rightFragment = new Fragment1();
        Bundle args = new Bundle();
        args.putInt("day", day);
        rightFragment.setArguments(args);
        android.support.v4.app.FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.replace(R.id.fragment_container, rightFragment);
        transaction.addToBackStack(null);
        transaction.commit();
        break; 
    default :
        break; 
}

To add a check for the down time, add the following class variables:

private Date start;
public static final int LONG_SWIPE_TIME = 400;//this will be the number of milliseconds needed to recognize the event as a swipe

Then add this to the DOWN case logic:

start = new Date();

In each of your swipe cases, you can then add this check:

if (start != null && new Date().getTime() - start.getTime() >= LONG_SWIPE_TIME) {
    start = null;
    //handle swipe code here.
}

And finally in your UP case, add:

start = null;

This will make it so that only swipes that are down for longer than LONG_SWIPE_TIME will be handled by your swipe code. For example, for the RIGHT case, you will have:

    case RIGHT :
        if (start != null && new Date().getTime() - start.getTime() >= LONG_SWIPE_TIME) {
            start = null;
            //TODO: Right swipe complete, so do something (such as):
            day++;
            Fragment1 rightFragment = new Fragment1();
            Bundle args = new Bundle();
            args.putInt("day", day);
            rightFragment.setArguments(args);
            android.support.v4.app.FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            transaction.replace(R.id.fragment_container, rightFragment);
            transaction.addToBackStack(null);
            transaction.commit();
        }
        break;