一个小应用，在图片上绘制文字，以下是绘制文字的方法，并且能够实现自动换行，字体自动适配屏幕大小
private void drawNewBitmap(ImageView imageView, String str) {Bitmap photo = BitmapFactory.decodeResource(this.getResources(), R.drawable.background);int width = photo.getWidth();int hight = photo.getHeight();//建立一个空的BitmapBitmap icon = Bitmap.createBitmap(width, hight, Bitmap.Config.ARGB_8888);// 初始化画布绘制的图像到icon上Canvas canvas = new Canvas(icon);// 建立画笔Paint photoPaint = new Paint(); // 获取更清晰的图像采样，防抖动photoPaint.setDither(true); // 过滤一下，抗剧齿photoPaint.setFilterBitmap(true);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//自定义的画笔TextPaint textPaint=myTextPaint();drawText(canvas,textPaint,str,45,hight/5,width);canvas.save(Canvas.ALL_SAVE_FLAG);canvas.restore();imageView.setImageBitmap(icon);saveMyBitmap(this,icon);}
//设置画笔的字体和颜色public TextPaint myTextPaint(){TextPaint textPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.DEV_KERN_TEXT_FLAG);// 设置画笔int TEXT_SIZE = Math.round(25 * getRATIO());textPaint.setTextSize(TEXT_SIZE);// 字体大小textPaint.setTypeface(Typeface.DEFAULT_BOLD);// 采用默认的宽度textPaint.setColor(Color.argb(255,94,38,18));// 采用的颜色return textPaint;
//写入文字，自动换行的方法public void drawText(Canvas canvas, TextPaint Paint,String textString,int x,int y,int width) { //int Width=Math.round(width* getRATIO());int start_x=Math.round(x * getRATIO());int start_y=Math.round(y * getRATIO());StaticLayout staticLayout=new StaticLayout(textString, Paint, width-start_x*2, Alignment.ALIGN_NORMAL, 1.5f, 0.0f, false); //绘制的位置 canvas.translate(start_x, start_y); staticLayout.draw(canvas); }