Example usage for android.text.method Touch onTouchEvent

Introduction

In this page you can find the example usage for android.text.method Touch onTouchEvent.

Prototype

public static boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) 

Source Link

Document

Handles touch events for dragging.

Usage

From source file:im.zico.fancy.common.widget.HackyMovementMethod.java

@Override
public boolean onTouchEvent(TextView widget, Spannable buffer, MotionEvent event) {
    if (mGray == null) {
        mGray = new BackgroundColorSpan(
                ContextCompat.getColor(widget.getContext(), R.color.alpha_spannable_pressed));
    }/*  www. j av a  2s . c  o m*/

    mIsLinkHit = false;

    int action = event.getAction();

    if (action == MotionEvent.ACTION_DOWN || action == MotionEvent.ACTION_UP) {
        int x = (int) event.getX();
        int y = (int) event.getY();
        x -= widget.getTotalPaddingLeft();
        y -= widget.getTotalPaddingTop();
        x += widget.getScrollX();
        y += widget.getScrollY();

        int line = widget.getLayout().getLineForVertical(y);
        int offset = widget.getLayout().getOffsetForHorizontal(line, x);

        ClickableSpan[] spans = buffer.getSpans(offset, offset, ClickableSpan.class);

        if (spans.length != 0) {
            int start = buffer.getSpanStart(spans[0]);
            int end = buffer.getSpanEnd(spans[0]);
            mIsLinkHit = true;
            if (action == MotionEvent.ACTION_DOWN) {
                buffer.setSpan(mGray, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
            } else if (action == MotionEvent.ACTION_UP) {
                spans[0].onClick(widget);
                buffer.removeSpan(mGray);
            }
            return true;
        }
    } else {
        buffer.removeSpan(mGray);
    }

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

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