Android给图片加水印

File fImage = new File("/sdcard/dcim","beijing.jpeg");

FileOutputStream iStream = new FileOutputStream(fImage);

* 取出Bitmap oriBmp

oriBmp.compress(CompressFormat.JPEG, 100, iStream);


int w = 320,h = 240;
String mstrTitle = “感受Android带给我们的新体验”;
Bitmap mbmpTest = Bitmap.createBitmap(w,h, Config.ARGB_8888);
Canvas canvasTemp = new Canvas(mbmpTest);
canvasTemp.drawColor(Color.WHITE);
Paint p = new Paint();
String familyName = “宋体”;
Typeface font = Typeface.create(familyName,Typeface.BOLD);
p.setColor(Color.RED);
p.setTypeface(font);
p.setTextSize(22);
canvasTemp.drawText(mstrTitle,0,100,p);

6.图片水印的生成方法

  生成水印的过程。其实分为三个环节:第一,载入原始图片;第二,载入水印图片;第三,保存新的图片。

  /**

  * create the bitmap from a byte array

  *

  * @param src the bitmap object you want proecss

  * @param watermark the water mark above the src

  * @return return a bitmap object ,if paramter's length is 0,return null

  */

  private Bitmap createBitmap( 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 bitmap

  Bitmap newb = Bitmap.createBitmap( w, h, Config.ARGB_8888 );//创建一个新的和SRC长度宽度一样的位图

  Canvas cv = new Canvas( newb );

  //draw src into

  cv.drawBitmap( src, 0, 0, null );//在 0,0坐标开始画入src

  //draw watermark into

  cv.drawBitmap( watermark, w - ww + 5, h - wh + 5, null );//在src的右下角画入水印

  //save all clip

  cv.save( Canvas.ALL_SAVE_FLAG );//保存

  //store

 cv.restore();//存储

  return newb;

  }


转自:http://blog.csdn.net/hachirou/archive/2010/04/11/5473312.aspx

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