ScopeMovementMethod.java

package edu.kufpg.armatus.activity;

import android.text.Layout;
import android.text.NoCopySpan;
import android.text.Spannable;
import android.text.Spanned;
import android.text.method.MovementMethod;
import android.text.method.ScrollingMovementMethod;
import android.text.style.ClickableSpan;
import android.view.MotionEvent;
import android.view.View;
import android.widget.TextView;

public class ScopeMovementMethod extends ScrollingMovementMethod {
	
    @Override
    public boolean onTouchEvent(TextView widget, Spannable buffer,
                                MotionEvent event) {
        int action = event.getAction();

        if (action == MotionEvent.ACTION_UP ||
            action == MotionEvent.ACTION_DOWN) {
            int x = (int) event.getX();
            int y = (int) event.getY();

            x -= widget.getTotalPaddingLeft();
            y -= widget.getTotalPaddingTop();

            x += widget.getScrollX();
            y += widget.getScrollY();

            Layout layout = widget.getLayout();
            int line = layout.getLineForVertical(y);
            int off = layout.getOffsetForHorizontal(line, x);

            ClickableSpan[] link = buffer.getSpans(off, off, ClickableSpan.class);

            if (link.length != 0) {
                if (action == MotionEvent.ACTION_UP) {
                    link[0].onClick(widget);
                }

                return true;
            }
        }

        return super.onTouchEvent(widget, buffer, event);
    }

    @Override
    public void initialize(TextView widget, Spannable text) {
        text.removeSpan(FROM_BELOW);
    }

    @Override
    public void onTakeFocus(TextView view, Spannable text, int dir) {
        if ((dir & View.FOCUS_BACKWARD) != 0) {
            text.setSpan(FROM_BELOW, 0, 0, Spanned.SPAN_POINT_POINT);
        } else {
            text.removeSpan(FROM_BELOW);
        }
    }
	
	public static MovementMethod getInstance() {
        if (sInstance == null)
            sInstance = new ScopeMovementMethod();

        return sInstance;
    }

    private static ScopeMovementMethod sInstance;
    private static Object FROM_BELOW = new NoCopySpan.Concrete();

}