一个TextView里面ClickableSpan的怎么弄协调？ [英] How get coordinate of a ClickableSpan inside a TextView?

问题描述

我有一个的TextView 许多 ClickableSpan 。

在点击一个 ClickableSpan ，我得在它的屏幕坐标（显示自定义的查看在他的位置）。

On click on a ClickableSpan, I have to get the coordinate on screen of it (to show a custom View at his position).

现在的问题是，我不知道怎么我能做到这一点。的的onClick（）方法 ClickableSpan 给我在参数查看的的TextView 包含 ClickableSpan 。

The problem is that I have no idea of how I can do this. The onClick() method of the ClickableSpan gives me in parameter a View, the TextView which contains the ClickableSpan.

我已经使用以下命令获取对屏幕中的的TextView ，但我不知道怎样才能将其转换得到的x / y位置的字符位置文本。

I have used the following to get characters position in the TextView, but I don't know how I can convert it to get x/y position on screen of the text.

@Override
public void onClick(View v){

    SpannableString completeText = (SpannableString)((TextView) v).getText();
    Log.v("characters position", completeText.getSpanStart(this) + " / " + completeText.getSpanEnd(this));

}

在此先感谢您的帮助！

Thanks in advance for your help!

编辑：我想要得到的ClickableSpan和大小的整个协调，其目的是要表明我的自定义视图，在文本的底部中心。该onTouch方法会给我手指的位置，而不是整个文本坐标。所以，用这种方法，我不会有文本的中间

EDIT : I want to get the entire coordinate of the ClickableSpan and its size, the aim is to show my custom view at the bottom center of the text. The onTouch method will give me the finger position, not the entire text coordinates. So, with this method, I will not have the middle of the text.

推荐答案

我已经找到了解决办法:-) 这，可能是这将帮助其他人同样的问题比我！

I have found a solution :-) Here it is, may be this will help other persons with the same problem than me !

// Initialize global value
this.parentTextViewRect = new Rect();


// Initialize values for the computing of clickedText position
SpannableString completeText = (SpannableString)(parentTextView).getText();
Layout textViewLayout = parentTextView.getLayout();

double startOffsetOfClickedText = completeText.getSpanStart(clickedText);
double endOffsetOfClickedText = completeText.getSpanEnd(clickedText);
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, this.parentTextViewRect);


// Update the rectangle position to his real position on screen
int[] parentTextViewLocation = {0,0};
parentTextView.getLocationOnScreen(parentTextViewLocation);

double parentTextViewTopAndBottomOffset = (
    parentTextViewLocation[1] - 
    parentTextView.getScrollY() + 
    this.parentTextView.getCompoundPaddingTop()
);
this.parentTextViewRect.top += parentTextViewTopAndBottomOffset;
this.parentTextViewRect.bottom += parentTextViewTopAndBottomOffset;

// In the case of multi line text, we have to choose what rectangle take
if (keywordIsInMultiLine){

    int screenHeight = this.mWindowManager.getDefaultDisplay().getHeight();
    int dyTop = this.parentTextViewRect.top;
    int dyBottom = screenHeight - this.parentTextViewRect.bottom;
    boolean onTop = dyTop > dyBottom;

    if (onTop){
        endXCoordinatesOfClickedText = textViewLayout.getLineRight(currentLineStartOffset);
    }
    else{
        this.parentTextViewRect = new Rect();
        textViewLayout.getLineBounds(currentLineEndOffset, this.parentTextViewRect);
        this.parentTextViewRect.top += parentTextViewTopAndBottomOffset;
        this.parentTextViewRect.bottom += parentTextViewTopAndBottomOffset;
        startXCoordinatesOfClickedText = textViewLayout.getLineLeft(currentLineEndOffset);
    }

}

this.parentTextViewRect.left += (
    parentTextViewLocation[0] +
    startXCoordinatesOfClickedText + 
    this.parentTextView.getCompoundPaddingLeft() - 
    parentTextView.getScrollX()
);
this.parentTextViewRect.right = (int) (
    this.parentTextViewRect.left + 
    endXCoordinatesOfClickedText - 
    startXCoordinatesOfClickedText
);

这篇关于一个TextView里面ClickableSpan的怎么弄协调？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！