Example usage for android.text Layout getLineBounds

Introduction

In this page you can find the example usage for android.text Layout getLineBounds.

Prototype

public int getLineBounds(int line, Rect bounds) 

Source Link

Document

Return the baseline for the specified line (0…getLineCount() - 1) If bounds is not null, return the top, left, right, bottom extents of the specified line in it.

Usage

From source file:com.nttec.everychan.ui.presentation.BoardFragment.java

private Point getSpanCoordinates(View widget, ClickableURLSpan span) {
    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();

    int startOffsetOfClickedText = completeText.getSpanStart(span);
    int endOffsetOfClickedText = completeText.getSpanEnd(span);
    double startXCoordinatesOfClickedText = textViewLayout.getPrimaryHorizontal(startOffsetOfClickedText);
    double endXCoordinatesOfClickedText = textViewLayout.getPrimaryHorizontal(endOffsetOfClickedText);

    // Get the rectangle of the clicked text
    int currentLineStartOffset = textViewLayout.getLineForOffset(startOffsetOfClickedText);
    int currentLineEndOffset = textViewLayout.getLineForOffset(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());

    Rect windowRect = new Rect();
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(windowRect);
    parentTextViewTopAndBottomOffset -= windowRect.top;

    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.top + parentTextViewRect.bottom) / 2;
    if (keywordIsInMultiLine) {
        x = parentTextViewRect.left;/*  ww  w.  ja v  a  2s  . c om*/
    }

    return new Point(x, y);
}

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