Add a watermark image or text to an Android image

The basic idea of adding a watermark to a picture is to load the original image, add text or load a watermark image, save the three parts of the picture

To add a watermark image:

Private Bitmap Createwatermaskimage (Context gcontext, Bitmap src, Bitmap watermark) {String tag = "CreateBitmap"; LOG.D (Tag, "Create a new bitmap"); if (src = = null) {return null;} int w = src.getwidth (), int h = src.getheight (), int ww = watermark.getwidth (); int wh = Watermark.getheight ();//Create the New blank Bitmapbitmap newb = Bitmap.createbitmap (W, H, config.argb_8888);//Create a new bitmap with the same src length width as canvas CV = new Canvas (new b);//Draw src Intocv.drawbitmap (src, 0, 0, NULL);//at 0, 0 coordinates begin drawing into src//draw watermark Intocv.drawbitmap (watermark, 20, 20, NULL)//watermark in the lower right corner of SRC//Save All Clipcv.save (Canvas.all_save_flag);//saving//Storecv.restore ();//Store return NEWB;}

Add text

  public static Bitmap SCALEWITHWH (Bitmap src, double W, double h) {if (w = = 0 | | h = = 0 | | src = = NULL) {        return SRC;            } else {//record SRC's width height int width = src.getwidth ();            int height = src.getheight ();            Create a matrix container matrix matrix = new Matrix ();            Calculates the scale of float ScaleWidth = (float) (w/width);            float ScaleHeight = (float) (h/height);            Start Scaling Matrix.postscale (ScaleWidth, ScaleHeight);        Create scaled picture return Bitmap.createbitmap (src, 0, 0, width, height, matrix, true); }}public Bitmap Drawtexttobitmap (Context gcontext, int gresid, String gtext) {Resources resources = Gconte    Xt.getresources ();    Float scale = resources.getdisplaymetrics (). density;       Bitmap Bitmap = bitmapfactory.decoderesource (resources, GRESID);    Bitmap = SCALEWITHWH (Bitmap, 300*scale, 300*scale); Android.graphics.Bitmap.Config bitMapconfig = Bitmap.getconfig (); Set default Bitmap config if none if (Bitmapconfig = = null) {Bitmapconfig = Android.graphics.Bitmap.Config.ARGB    _8888; }//Resource bitmaps is imutable,//So we need to convert it to mutable one bitmap = Bitmap.copy (bitmapconfig       , true);    Canvas canvas = new canvas (bitmap);    New antialised Paint paint paint = new paint (Paint.anti_alias_flag);      Text color-#3D3D3D paint.setcolor (color.red);         Paint.settextsize ((int) (* scale)); Paint.setdither (TRUE);    Gets the image sampled with clear Paint.setfilterbitmap (true);//filter some rect bounds = new rect ();      Paint.gettextbounds (gtext, 0, Gtext.length (), bounds);    int x = 30;       int y = 30;       Canvas.drawtext (gtext, x * scale, Y * scale, paint);  return bitmap;  }

Add a watermark image or text to an Android image