ScrollView get back to top

Question

So i have scrollView that has only one view on it (EditText), and i want to implement the

dispatchTouchEvent(MotionEvent me)
 View current_view = Processor.findViewGroupWithPoint(
            (int) me.getRawX(), (int) me.getRawY(), rmodel.layout.parent);
    if (current_view instanceof ScrollView) {


        switch( me.getAction() ){
        case MotionEvent.ACTION_DOWN:
            Log.d(TAG, " down");

            ((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_DOWN);

            break;
        case MotionEvent.ACTION_UP:
            Log.d(TAG, " up");
((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_UP);
            break;
        }

}

My problem is, when i scroll down, it works, but i have to hold my finger on the screen, as if i removed it, it will get back to top of the scrollView.

Answer 1

As far as I can tell it goes to the top of the scrollView when you let go because you tell it to. you say

case MotionEvent.ACTION_UP:
    Log.d(TAG, " up");
    ((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_UP);

MotionEvent.ACTION_UP is used to detect when your finger is released, so when it does in this you tell it to go to the top with

((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_UP);

To fix this, all you really have to do is remove that line...

EDIT:

I wrote this up and it should work, might need some tweaks.

boolean bottom = false;

Basically here just create a boolean called bottom and set it to false ^^

case MotionEvent.ACTION_DOWN:
    Log.d(TAG, " down");

    if (bottom = false){
        ((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_DOWN);
    }else{
        ((ScrollView) findViewById(111111)).fullScroll(View.FOCUS_UP);
    }
    break;
}

This is just seeing if the ScrollView is at the bottom or now... Hope it works!