TextView 中确定 ClickableSpan 的具体位置

来源：互联网发布：洛杉矶之战知乎编辑：程序博客网时间：2024/04/27 13:29

现在有一个需求是 TextView 中要有特殊的字符加颜色还需要可以点击弹出pop,点击跳转和改变颜色这个需求 ClickableSpan 就可以胜任。但是找到具体位置就有点困难。

这里写图片描述

1.确定 ClickableSpan 的具体位置

注意需要加上 textView.setMovementMethod(LinkMovementMethod.getInstance());表示可以点击的

SpannableString ssb = new SpannableString("xxxxx");ssb.setSpan(new ClickableSpan() {                    @Override                    public void onClick(View widget) {                        TextView parentTextView = (TextView) widget;                        Rect parentTextViewRect = new Rect();                        // Initialize values for the computing of clickedText position                        SpannableString completeText = (SpannableString)(parentTextView).getText();                        Layout textViewLayout = parentTextView.getLayout();                        double startOffsetOfClickedText = completeText.getSpanStart(this);                        double endOffsetOfClickedText = completeText.getSpanEnd(this);                        double startXCoordinatesOfClickedText = textViewLayout.getPrimaryHorizontal((int)startOffsetOfClickedText);                        double endXCoordinatesOfClickedText = textViewLayout.getPrimaryHorizontal((int)endOffsetOfClickedText);                        // Get the rectangle of the clicked text                        int currentLineStartOffset = textViewLayout.getLineForOffset((int)startOffsetOfClickedText);                        int currentLineEndOffset = textViewLayout.getLineForOffset((int)endOffsetOfClickedText);                        boolean keywordIsInMultiLine = currentLineStartOffset != currentLineEndOffset;                        textViewLayout.getLineBounds(currentLineStartOffset, parentTextViewRect);                        // Update the rectangle position to his real position on screen                        int[] parentTextViewLocation = {0,0};                        parentTextView.getLocationOnScreen(parentTextViewLocation);                        double parentTextViewTopAndBottomOffset = (                                parentTextViewLocation[1] -                                        parentTextView.getScrollY() +                                        parentTextView.getCompoundPaddingTop()                        );                        parentTextViewRect.top += parentTextViewTopAndBottomOffset;                        parentTextViewRect.bottom += parentTextViewTopAndBottomOffset;                        parentTextViewRect.left += (                                parentTextViewLocation[0] +                                        startXCoordinatesOfClickedText +                                        parentTextView.getCompoundPaddingLeft() -                                        parentTextView.getScrollX()                        );                        parentTextViewRect.right = (int) (                                parentTextViewRect.left +                                        endXCoordinatesOfClickedText -                                        startXCoordinatesOfClickedText                        );                        int x = (parentTextViewRect.left + parentTextViewRect.right) / 2;                        int y = parentTextViewRect.bottom;                        if (keywordIsInMultiLine) {                            x = parentTextViewRect.left;                        }                        spanTextLeft = x;                        spanTextTop = parentTextViewRect.top;                        spanTextBottom = y;                        ///显示弹出层                        showSubTitlePop(widget,name,stockid.toUpperCase());                    }                    @Override                    public void updateDrawState(TextPaint ds) {                        super.updateDrawState(ds);                           ds.setColor(xxxx); // 设置文本颜色                           // 去掉下划线                          ds.setUnderlineText(false);                    }                }, start, start + name.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

注意点：

1.double startOffsetOfClickedText = completeText.getSpanStart(this);
这个this是 ClickableSpan onclick 里面的this,其他的 this 是获取不到具体的值得。
2. x,y 就是最终左边距和上边距，获取的是全屏的具体距离不是相对 textView 的

2.参考资料

How get coordinate of a ClickableSpan inside a TextView?

http://stackoverflow.com/questions/11905486/how-get-coordinate-of-a-clickablespan-inside-a-textview

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