android 图片加文字

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) {

}

}

}

}