画布上的Android drawText什么都不做

Question

我试图在位图上绘制文本，然后返回更改后的位图

    public Bitmap applyHeadline(Bitmap image)
{
    alteredImages = image;
    Paint paint = new Paint();
    paint.setColor(Color.BLACK);
    paint.setStyle(Paint.Style.FILL);
    Bitmap tempBitmap = Bitmap.createBitmap(alteredImages.getWidth(),alteredImages.getHeight(), Bitmap.Config.RGB_565);
    Canvas tempCanvas = new Canvas(tempBitmap);
    tempCanvas.drawPaint(paint);
    paint.setTextSize(size);
    tempCanvas.drawBitmap(alteredImages, 0, 0, null);
    tempCanvas.drawText("test", 0, 0, paint);
    return tempBitmap;

}

但是，图像上没有任何改变。我对java和android一般都很新，所以很抱歉提前成为一个白痴。任何帮助将不胜感激。