Android 拍照添加时间水印

效果如下图 :

1、拍照

//          非空判断 拍照
            if (mCamera0 != null){
                mCamera0.takePicture(null, null, jpeg0); // 1 front
            }
            

2、创建JPEG数据回调

    // 创建JPEG图片回调数据对象
    public static PictureCallback jpeg0 = new PictureCallback() {
        @Override
        public void onPictureTaken(byte[] data, Camera camera) {
            try {
                // 获得图片
                Bitmap mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
                //添加时间水印
                Bitmap mTimeWatermark = AddTimeWatermark(mBitmap);
                // 判断文件夹是否存在，传入图片存储路径
                CreateFile(StaticVariables.mPicPath);

                String mPath = StaticVariables.mPicPath + System.currentTimeMillis()+".jpeg";       //临时测试命名

                File mFile = new File(mPath);

                BufferedOutputStream mOutputStream = new BufferedOutputStream(new FileOutputStream(mFile));
                // 将图片压缩到流中
                mTimeWatermark.compress(Bitmap.CompressFormat.JPEG,100,mOutputStream);      //时间水印

                mOutputStream.flush();
                mOutputStream.close();

                // 停止预览
                mCamera0.stopPreview();
                mCamera0.release();
                mCamera0 = Camera.open(4);
                Parameters parameters = mCamera0.getParameters();
                // parameters.setPreviewSize(width, height);
                mCamera0.setParameters(parameters);
                mCamera0.setDisplayOrientation(0);

                mCamera0.setPreviewTexture(mTextureView0.getSurfaceTexture());

                // 处理完数据之后预览
                mCamera0.startPreview();
            } catch (Exception e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

    };

3、添加时间水印：AddTimeWatermark(mBitmap);

    /**
     * 添加时间水印
     * @param mBitmap
     * @return mNewBitmap
     */
    private  Bitmap AddTimeWatermark(Bitmap mBitmap) {
        //获取原始图片与水印图片的宽与高
        int mBitmapWidth = mBitmap.getWidth();
        int mBitmapHeight = mBitmap.getHeight();
      //定义底片 大小 将mBitmap填充  
        Bitmap mNewBitmap = Bitmap.createBitmap(mBitmapWidth, mBitmapHeight, Bitmap.Config.ARGB_8888);
        Canvas mCanvas = new Canvas(mNewBitmap);
        //向位图中开始画入MBitmap原始图片
        mCanvas.drawBitmap(mBitmap,0,0,null);
        //添加文字
        Paint mPaint = new Paint();
        String mFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss EEEE").format(new Date());
        //String mFormat = TingUtils.getTime()+"\n"+" 纬度:"+GpsService.latitude+"  经度:"+GpsService.longitude;
        mPaint.setColor(Color.RED);
        mPaint.setTextSize(20);
        //水印的位置坐标
        mCanvas.drawText(mFormat, (mBitmapWidth * 1) / 10,(mBitmapHeight*14)/15,mPaint);
//        mCanvas.save(Canvas.ALL_SAVE_FLAG);
        mCanvas.save();
        mCanvas.restore();

        return mNewBitmap;
    }

4、创建文件夹

    // 创建 文件夹
    public static void CreateFile(String path) {
        File destDir = new File(path);
        if (!destDir.exists()) {
            Log.i(TAG,"文件夹创建成功");
            destDir.mkdirs();
        } else {
            Log.i(TAG,"文件夹已存在");
        }
    }