我有一个带有许多TextView
的ClickableSpan
。
在单击ClickableSpan
时,我必须在屏幕上获取它的坐标(以便在他的位置显示自定义View
)。
问题是我不知道该怎么做。 onClick()
的ClickableSpan
方法在参数中给我一个View
,即包含TextView
的ClickableSpan
。
我已经使用以下命令在TextView
中获取字符位置,但是我不知道如何将其转换为在文本屏幕上获取x/y位置。
@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!
编辑:我想获取ClickableSpan的整个坐标及其大小,目的是在文本的底部中心显示我的自定义 View 。 onTouch方法将给我手指的位置,而不是整个文本的坐标。因此,使用这种方法,我将不会获得本文的中间部分。
最佳答案
我找到了解决方案:-)
就是这样,这可能会帮助像我一样遇到同样问题的其他人!
// 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
);