Disable Scrollview Programmatically

Disable ScrollView Programmatically?

Several points to begin with:

1. You cannot disable the scrolling of a ScrollView. You would need to extend to ScrollView and override the onTouchEvent method to return false when some condition is matched.
2. The Gallery component scrolls horizontally regardless of whether it is in a ScrollView or not - a ScrollView provides only vertical scrolling (you need a HorizontalScrollView for horizontal scrolling)
3. You seem to say you have a problem with the image stretching itself -- this has nothing to do with the ScrollView, you can change how an ImageView scales with the android:scaleType property (XML) or the setScaleType method - for instance ScaleType.CENTER will not stretch your image and will center it at it's original size

You could modify ScrollView as follows to disable scrolling

class LockableScrollView extends ScrollView {

    ...

    // true if we can scroll (not locked)
    // false if we cannot scroll (locked)
    private boolean mScrollable = true;

    public void setScrollingEnabled(boolean enabled) {
        mScrollable = enabled;
    }

    public boolean isScrollable() {
        return mScrollable;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                // if we can scroll pass the event to the superclass
                return mScrollable && super.onTouchEvent(ev);
            default:
                return super.onTouchEvent(ev);
        }
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // Don't do anything with intercepted touch events if
        // we are not scrollable
        return mScrollable && super.onInterceptTouchEvent(ev);
    }

}

You would then use

<com.mypackagename.LockableScrollView 
    android:id="@+id/QuranGalleryScrollView" 
    android:layout_height="fill_parent" 
    android:layout_width="fill_parent">

    <Gallery android:id="@+id/Gallery" 
        android:layout_width="fill_parent" 
        android:layout_height="fill_parent"
        android:scrollbars="horizontal">
    </Gallery>

</com.mypackagename.LockableScrollView>

in your XML file (just changed the ScrollView to your special LockableScrollView).

Then call

((LockableScrollView)findViewById(R.id.QuranGalleryScrollView)).setScrollingEnabled(false);

to disable scrolling of the view.

I think that you have more than just the issue of disabling scrolling though to achieve your desired result (the gallery will remain scrollable with the above code for instance) - I'd recommend doing some more research on each of the three components (Gallery, ScrollView, ImageView) to see what properties each one has and how it behaves.

How to disable and enable the scrolling on android ScrollView?

Try this way

Create Your CustomScrollview like this

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

public class CustomScrollView extends ScrollView {

    private boolean enableScrolling = true;

    public boolean isEnableScrolling() {
        return enableScrolling;
    }

    public void setEnableScrolling(boolean enableScrolling) {
        this.enableScrolling = enableScrolling;
    }

    public CustomScrollView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    public CustomScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomScrollView(Context context) {
        super(context);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {

        if (isEnableScrolling()) {
            return super.onInterceptTouchEvent(ev);
        } else {
            return false;
        }
    }
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
       if (isEnableScrolling()) {
            return super.onTouchEvent(ev);
       } else {
           return false;
       }
}
}

In your xml

// "com.example.demo" replace with your packagename

<com.example.demo.CustomScrollView
        android:id="@+id/myScroll"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </com.example.demo.CustomScrollView>

In your Activity

CustomScrollView myScrollView = (CustomScrollView) findViewById(R.id.myScroll);
        myScrollView.setEnableScrolling(false); // disable scrolling
        myScrollView.setEnableScrolling(true); // enable scrolling

How can i disable a scrollview?

To make the scrollbars invisible use this attribute.

android:scrollbars="none"

Edit:

if there is need of runtime changes on visibility or state of enabling, for that we can use the scrolview.setEnabled(false) or android:enabled=false.

Nativescript: how to programmatically disable / enable ScrollView scrolling?

Ok, I found how to do that. It's actually pretty easy on iOS:

var scrollView = page.getViewById('YOUR_VIEW_ID')
scrollView.ios.scrollEnabled = false // to disable
scrollView.ios.scrollEnabled = true  // to enable back

Android:

Also for my particular case, where I need to disable scrolling of the Scroll View, but drag and drop child views inside. On subview start dragging (panning) event we prevent touch events interception in our Scroll View by:

scrollView._nativeView.requestDisallowInterceptTouchEvent(true)

And enable them again on stop dragging (panning) subview event by:

scrollView._nativeView.requestDisallowInterceptTouchEvent(false)

If you have another case and just want to disable Scroll View scrolling you can use something like this (for Android):

scrollView._nativeView.setOnTouchListener(new android.view.View.OnTouchListener({
   onTouch: function (view, motionEvent) {
       console.log("DISABLED. onTouch event: Got    motionEvent.getAction() " + motionEvent.getAction() + ".");
       return true;
    }
}))

How to disable work of ScrollView on inner SeekBar?

You need to temporary stop the ScrollView scrolling and re-enable it when you're done manipulating the SeekBar.

To achieve that: Instead of using ScrollView, use the below customized one where Overriding onInterceptTouchEvent did the trick.

public class LockableScrollView extends ScrollView {

    // true if we can scroll (not locked)
    // false if we cannot scroll (locked)
    private boolean mScrollable = true;

    public LockableScrollView(Context context) {
        super(context);
    }

    public LockableScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public LockableScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public void setScrollingEnabled(boolean enabled) {
        mScrollable = enabled;
    }

    public boolean isScrollable() {
        return mScrollable;
    }

    @SuppressLint("ClickableViewAccessibility")
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {// if we can scroll pass the event to the superclass
            return mScrollable && super.onTouchEvent(ev);
        }
        return super.onTouchEvent(ev);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // Don't do anything with intercepted touch events if
        // we are not scrollable
        return mScrollable && super.onInterceptTouchEvent(ev);
    }
}

You can temporary stop the scrolling when you touch the SeekBar by calling myScrollView.setScrollingEnabled(false); and enable it when you lift the finger off the Seekbar as below

seekBar.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN)
            myScrollView.setScrollingEnabled(false);
        else if (event.getAction() == MotionEvent.ACTION_UP)
            myScrollView.setScrollingEnabled(true);
        return false;
    }
});

Reference of LocableScrollView

How to disable HorizontalScrollView

1. You cannot disable the scrolling of a ScrollView. You would need to
   extend to ScrollView and override the onTouchEvent method to return
   false when some condition is matched.
2. The Gallery component scrolls
   horizontally regardless of whether it is in a ScrollView or not - a
   ScrollView provides only vertical scrolling (you need a
   HorizontalScrollView for horizontal scrolling).
3. You seem to say you
   have a problem with the image stretching itself -- this has nothing
   to do with the ScrollView, you can change how an ImageView scales
   with the android:scaleType property (XML) or the setScaleType method
   for instance ScaleType.CENTER will not stretch your image and will center it at it's original size.

You could modify ScrollView as follows to disable scrolling:

  class LockableScrollView extends ScrollView {   

    // true if we can scroll (not locked)
    // false if we cannot scroll (locked)
    private boolean mScrollable = true;

    public void setScrollingEnabled(boolean enabled) {
        mScrollable = enabled;
    }

    public boolean isScrollable() {
        return mScrollable;
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                // if we can scroll pass the event to the superclass
                return mScrollable && super.onTouchEvent(ev);
            default:
                return super.onTouchEvent(ev);
        }
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        // Don't do anything with intercepted touch events if
        // we are not scrollable
        return mScrollable && super.onInterceptTouchEvent(ev);
    }

}

then,

 <com.mypackagename.LockableScrollView 
        android:id="@+id/QuranGalleryScrollView" 
        android:layout_height="fill_parent" 
        android:layout_width="fill_parent">
    
        <Gallery android:id="@+id/Gallery" 
            android:layout_width="fill_parent" 
            android:layout_height="fill_parent"
            android:scrollbars="horizontal">
        </Gallery>
    
    </com.mypackagename.LockableScrollView>

in your XML file (just changed the ScrollView to your special LockableScrollView).

Then call

((LockableScrollView)findViewById(R.id.QuranGalleryScrollView)).setScrollingEnabled(false);

to disable scrolling of the view.

How to only disable scroll in ScrollView but not content view?

Only pass .horizontal as the scroll axis if you want the view to scroll. Otherwise, pass the empty set.

struct TestView: View {
    @Binding var shouldScroll: Bool

    var body: some View {
        ScrollView(axes, showsIndicators: false) {
            Text("Your content here")
        }
    }

    private var axes: Axis.Set {
        return shouldScroll ? .horizontal : []
    }
}

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