问用android热打印机打印阿拉伯字符

EN

    public Bitmap getMultiLangTextAsImage(String text, Paint.Align align, float textSize, Typeface typeface)  {


    Paint paint = new Paint();

    paint.setAntiAlias(true);
    paint.setColor(Color.BLACK);
    paint.setTextSize(textSize);
    if (typeface != null) paint.setTypeface(typeface);

    // A real printlabel width (pixel)
    float xWidth = 385;

    // A height per text line (pixel)
    float xHeight = textSize + 5;

    // it can be changed if the align's value is CENTER or RIGHT
    float xPos = 0f;

    // If the original string data's length is over the width of print label,
    // or '\n' character included,
    // it will be increased per line gerneating.
    float yPos = 27f;

    // If the original string data's length is over the width of print label,
    // or '\n' character included,
    // each lines splitted from the original string are added in this list
    // 'PrintData' class has 3 members, x, y, and splitted string data.
    List<PrintData> printDataList = new ArrayList<PrintData>();

    // if '\n' character included in the original string
    String[] tmpSplitList = text.split("\\n");
    for (int i = 0; i <= tmpSplitList.length - 1; i++) {
        String tmpString = tmpSplitList[i];

        // calculate a width in each split string item.
        float widthOfString = paint.measureText(tmpString);

        // If the each split string item's length is over the width of print label,
        if (widthOfString > xWidth) {
            String lastString = tmpString;
            while (!lastString.isEmpty()) {

                String tmpSubString = "";

                // retrieve repeatedly until each split string item's length is
                // under the width of print label
                while (widthOfString > xWidth) {
                    if (tmpSubString.isEmpty())
                        tmpSubString = lastString.substring(0, lastString.length() - 1);
                    else
                        tmpSubString = tmpSubString.substring(0, tmpSubString.length() - 1);

                    widthOfString = paint.measureText(tmpSubString);
                }

                // this each split string item is finally done.
                if (tmpSubString.isEmpty()) {
                    // this last string to print is need to adjust align
                    if (align == Paint.Align.CENTER) {
                        if (widthOfString < xWidth) {
                            xPos = ((xWidth - widthOfString) / 2);
                        }
                    } else if (align == Paint.Align.RIGHT) {
                        if (widthOfString < xWidth) {
                            xPos = xWidth - widthOfString;
                        }
                    }
                    printDataList.add(new PrintData(xPos, yPos, lastString));
                    lastString = "";
                } else {
                    // When this logic is reached out here, it means,
                    // it's not necessary to calculate the x position
                    // 'cause this string line's width is almost the same
                    // with the width of print label
                    printDataList.add(new PrintData(0f, yPos, tmpSubString));

                    // It means line is needed to increase
                    yPos += 27;
                    xHeight += 30;

                    lastString = lastString.replaceFirst(tmpSubString, "");
                    widthOfString = paint.measureText(lastString);
                }
            }
        } else {
            // This split string item's length is
            // under the width of print label already at first.
            if (align == Paint.Align.CENTER) {
                if (widthOfString < xWidth) {
                    xPos = ((xWidth - widthOfString) / 2);
                }
            } else if (align == Paint.Align.RIGHT) {
                if (widthOfString < xWidth) {
                    xPos = xWidth - widthOfString;
                }
            }
            printDataList.add(new PrintData(xPos, yPos, tmpString));
        }

        if (i != tmpSplitList.length - 1) {
            // It means the line is needed to increase
            yPos += 27;
            xHeight += 30;
        }
    }

    // If you want to print the text bold
    //paint.setTypeface(Typeface.create(null as String?, Typeface.BOLD))

    // create bitmap by calculated width and height as upper.
    Bitmap bm = Bitmap.createBitmap((int) xWidth, (int) xHeight, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bm);
    canvas.drawColor(Color.WHITE);

    for (PrintData tmpItem : printDataList)
        canvas.drawText(tmpItem.text, tmpItem.xPos, tmpItem.yPos, paint);


    return bm;
}

static class PrintData {
    float xPos;
    float yPos;
    String text;

    public PrintData(float xPos, float yPos, String text) {
        this.xPos = xPos;
        this.yPos = yPos;
        this.text = text;
    }

    public float getxPos() {
        return xPos;
    }

    public void setxPos(float xPos) {
        this.xPos = xPos;
    }

    public float getyPos() {
        return yPos;
    }

    public void setyPos(float yPos) {
        this.yPos = yPos;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }
}