为图片加水印

@Override
 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

 

 

  ImageView iv=(ImageView)findViewById(R.id.testImageView);

  Drawable d=this.getResources().getDrawable(R.drawable.icon);

  Bitmap bm=createBitmap(drawableToBitmap(d),drawableToBitmap(this.getResources().getDrawable(R.drawable.bonus_delivery_small)));

  iv.setImageBitmap(bm);
 }
 

//drawable转换Bitmap
 public static Bitmap drawableToBitmap(Drawable drawable) {  
       
        Bitmap bitmap = Bitmap  
                        .createBitmap(  
                                        drawable.getIntrinsicWidth(),  
                                        drawable.getIntrinsicHeight(),  
                                        drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888  
                                                        : Bitmap.Config.RGB_565);  
        Canvas canvas = new Canvas(bitmap);  
        //canvas.setBitmap(bitmap);  
        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());  
        drawable.draw(canvas);  
        return bitmap;  
} 

 

//icon加入水印

 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-6, h - wh-2, 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;
    }