两种方法：1.直接在图片上写文字String str = "PICC要写的文字";ImageView image = (ImageView) this.findViewById(R.id.ImageView);Bitmap photo = BitmapFactory.decodeResource(this.getResources(), R.drawable.text);int width = photo.getWidth(), hight = photo.getHeight();System.out.println("宽"+width+"高"+hight);icon = Bitmap.createBitmap(width, hight, Bitmap.Config.ARGB_8888); //建立一个空的BItMap  Canvas canvas = new Canvas(icon);//初始化画布绘制的图像到icon上
        Paint photoPaint = new Paint(); //建立画笔  photoPaint.setDither(true); //获取跟清晰的图像采样  photoPaint.setFilterBitmap(true);//过滤一些
        Rect src = new Rect(0, 0, photo.getWidth(), photo.getHeight());//创建一个指定的新矩形的坐标  Rect dst = new Rect(0, 0, width, hight);//创建一个指定的新矩形的坐标  canvas.drawBitmap(photo, src, dst, photoPaint);//将photo 缩放或则扩大到 dst使用的填充区photoPaint
        Paint textPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);//设置画笔  textPaint.setTextSize(20.0f);//字体大小  textPaint.setTypeface(Typeface.DEFAULT_BOLD);//采用默认的宽度  textPaint.setColor(Color.RED);//采用的颜色  //textPaint.setShadowLayer(3f, 1, 1,this.getResources().getColor(android.R.color.background_dark));//影音的设置  canvas.drawText(str, 20, 26, textPaint);//绘制上去字，开始未知x,y采用那只笔绘制
       canvas.save(Canvas.ALL_SAVE_FLAG); canvas.restore(); image.setImageBitmap(icon);saveMyBitmap(icon);2.将两个图片合成onCreat方法里面{Bitmap mark = BitmapFactory.decodeResource(this.getResources(), R.drawable.icon); Bitmap photo = BitmapFactory.decodeResource(this.getResources(), R.drawable.text);Bitmap a = createBitmap(photo,mark);image.setImageBitmap(a);saveMyBitmap(a);}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;}//保存图片到data下面public void saveMyBitmap(Bitmap bmp){FileOutputStream fos = null;try {fos = openFileOutput("image1.jpg", Context.MODE_PRIVATE);bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);} catch (FileNotFoundException e) {} finally {if (fos != null) {try {fos.flush();fos.close();} catch (IOException e) {}}}}