解决TextView中既有汉字又有字母数字导致折行，排版不整洁问

  textview.getViewTreeObserver().addOnGlobalLayoutListener(new OnTvGlobalLayoutListener(textview));

    private class OnTvGlobalLayoutListener implements ViewTreeObserver.OnGlobalLayoutListener {
        TextView mText;
        public  OnTvGlobalLayoutListener(TextView mText){
            this.mText = mText;
        }
      @Override
        public void onGlobalLayout() {
                      mText.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                     final String newText = autoSplitText(mText);
                   if (!TextUtils.isEmpty(newText)) {
                           mText.setText(newText);
                        }
                  }
    }
    private String autoSplitText(final TextView tv) {
           final String rawText = tv.getText().toString(); //原始文本
            final Paint tvPaint = tv.getPaint(); //paint，包含字体等信息
          final float tvWidth = tv.getWidth() - tv.getPaddingLeft() - tv.getPaddingRight(); //控件可用宽度

           //将原始文本按行拆分
           String [] rawTextLines = rawText.replaceAll("\r", "").split("\n");
            StringBuilder sbNewText = new StringBuilder();
            for (String rawTextLine : rawTextLines) {
                     if (tvPaint.measureText(rawTextLine) <= tvWidth) {
                           //如果整行宽度在控件可用宽度之内，就不处理了
                         sbNewText.append(rawTextLine);
                       } else {
                         //如果整行宽度超过控件可用宽度，则按字符测量，在超过可用宽度的前一个字符处手动换行
                        float lineWidth = 0;
                           for (int cnt = 0; cnt != rawTextLine.length(); ++cnt) {
                                  char ch = rawTextLine.charAt(cnt);
                                   lineWidth += tvPaint.measureText(String.valueOf(ch));
                                  if (lineWidth <= tvWidth) {
                                             sbNewText.append(ch);
                                      } else {
                                           sbNewText.append("\n");
                                              lineWidth = 0;
                                                --cnt;
                               }
                        }
               }
                sbNewText.append("\n");
              }

             //把结尾多余的\n去掉
              if (!rawText.endsWith("\n")) {
                        sbNewText.deleteCharAt(sbNewText.length() - 1);
                  }

                return sbNewText.toString();
            }