不要在缩写的句点中包装Android TextView中的文本

Question

有没有办法控制TextView选择包装文本的位置？我遇到的问题是它想要在句点换行 - 所以像"在美国和加拿大可用"之类的字符串可以在U和S之间的时段之后换行.是否有办法告诉TextView不要除非有一个句​​号和一个空格,或者一些程序化的方法来控制包装,否则包装？

Answer 1

我最终编写了自己的算法,只在空格上打破文本.我最初使用了Paint的breakText方法,但是遇到了一些问题(实际上可以在这个版本的代码中解决,但是没关系).这不是我最好的代码块,它肯定可以清理一下,但它可以工作.由于我重写了TextView,我只是从onSizeChanged方法调用它来确保有一个有效的宽度.

private static void breakManually(TextView tv, Editable editable)
{
    int width = tv.getWidth() - tv.getPaddingLeft() - tv.getPaddingRight();
    if(width == 0)
    {
        // Can't break with a width of 0.
        return false;
    }

    Paint p = tv.getPaint();
    float[] widths = new float[editable.length()];
    p.getTextWidths(editable.toString(), widths);
    float curWidth = 0.0f;
    int lastWSPos = -1;
    int strPos = 0;
    final char newLine = '\n';
    final String newLineStr = "\n";
    boolean reset = false;
    int insertCount = 0;

    //Traverse the string from the start position, adding each character's
    //width to the total until:
    //* A whitespace character is found.  In this case, mark the whitespace
    //position.  If the width goes over the max, this is where the newline
    //will be inserted.
    //* A newline character is found.  This resets the curWidth counter.
    //* curWidth > width.  Replace the whitespace with a newline and reset 
    //the counter.

    while(strPos < editable.length())
    {
        curWidth += widths[strPos];

        char curChar = editable.charAt(strPos);

        if(((int) curChar) == ((int) newLine))
        {
            reset = true;
        }
        else if(Character.isWhitespace(curChar))
        {
            lastWSPos = strPos;
        }
        else if(curWidth > width && lastWSPos >= 0)
        {
            editable.replace(lastWSPos, lastWSPos + 1, newLineStr);
            insertCount++;
            strPos = lastWSPos;
            lastWSPos = -1;
            reset = true;
        }

        if(reset)
        {
            curWidth = 0.0f;
            reset = false;
        }

        strPos++;
    }

    if(insertCount != 0)
    {
         tv.setText(editable);
    }
}