ToggleableScrollWebView

DebouncedRunnable.Java

import android.os.Handler;

public class DebouncedRunnable implements Runnable {

    private long minimumInterval;
    private Handler pendingHandler;
    private Runnable runnable;

    public DebouncedRunnable(Runnable runnable, int minimumInterval) {
        this.minimumInterval = minimumInterval;
        this.runnable = runnable;
        pendingHandler = new Handler();
    }

    @Override
    public void run() {
        pendingHandler.removeCallbacks(runnable);
        pendingHandler.postDelayed(runnable, minimumInterval);
    }
}

ToggleableScrollWebView.java

import android.content.Context;
import android.webkit.WebView;

public class ToggleableScrollWebView extends WebView {

    private boolean scrollEnabled = true;

    private DebouncedRunnable debouncedEnableScroll;

    public ToggleableScrollWebView(Context context) {
        super(context);
        getSettings().setSupportZoom(false);
        debouncedEnableScroll = new DebouncedRunnable(new Runnable() {
            @Override
            public void run() {
                setScrollEnabled(true);
            }
        }, 300);
    }

    @Override
    protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY,
                                   int scrollRangeX, int scrollRangeY, int maxOverScrollX,
                                   int maxOverScrollY, boolean isTouchEvent) {
        if (scrollEnabled) {
            return super.overScrollBy(deltaX, deltaY, scrollX, scrollY,
                    scrollRangeX, scrollRangeY, maxOverScrollX, maxOverScrollY, isTouchEvent);
        }
        return false;
    }

    @Override
    public void scrollTo(int x, int y) {
        if (scrollEnabled) {
            super.scrollTo(x, y);
        }
    }

    @Override
    public void computeScroll() {
        if (scrollEnabled) {
            super.computeScroll();
        }
    }

    public void temporarilyBlockScrolling(){
        setScrollEnabled(false);
        debouncedEnableScroll.run();
    }


    public boolean checkIfScrollable() {
        return computeVerticalScrollRange() > getHeight()
                || computeHorizontalScrollRange() > getWidth();
    }

    public void setScrollEnabled(boolean scrollEnabled) {
        this.scrollEnabled = scrollEnabled;
    }

    public boolean isScrollEnabled() {
        return scrollEnabled;
    }
}