类似图上的右下角日期，就是我们用程序动态画上去的，这个时间显示什么时间当然要根据我们自己的业务需求来定。
以我们的举列，我们的客户要求这个时间显示的是照片拍摄的日期。
这个分为两种情况
1.添加照片时候 用相机拍摄的图片，这个当然直接取当时的时间就可以了，具体代码如下：
//拍照 private void fromCarema(OnFilishedListener listener) { if (hasSdcard()) { String path = null; if ( tempFile ==null || !tempFile.exists()) { listener.onFilish(null); return; } path = tempFile.getAbsolutePath(); if (TextUtils.isEmpty(path)) { listener.onFilish(null); return; } try { Bitmap bitmap = BitmapUtils.scaleBitmap(path); //+++++++++++++++++++画日期操作 bitmap = BitmapUtils.drawDate2Bitmap(bitmap); File file = new File(path); if (file.exists()) { file.delete(); } path = BitmapUtils.saveBitmap(bitmap); listener.onFilish(path); } catch (Exception e) { e.printStackTrace(); Log.e("保存图片", "图片保存失败"); listener.onFilish(null); } } else { if (fragment != null) { Toast.makeText(fragment.getActivity(), "未找到存储卡，无法存储照片！", Toast.LENGTH_SHORT) .show(); } else { Toast.makeText(activity, "未找到存储卡，无法存储照片！", Toast.LENGTH_SHORT).show(); } listener.onFilish(null); } }
public static Bitmap drawDate2Bitmap(Bitmap bitmap) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm", Locale.CHINA); String date = sdf.format(new Date()); Bitmap.Config bitmapConfig = bitmap.getConfig(); // set default bitmap config if none if (bitmapConfig == null) { bitmapConfig = Bitmap.Config.ARGB_8888; } bitmap = bitmap.copy(bitmapConfig, true); // 获取可改变的位图 Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); // text color - #3D3D3D paint.setColor(Color.RED); // text size in pixels paint.setTextSize(30); // text shadow // paint.setShadowLayer(1f, 0f, 1f, Color.WHITE); Rect bounds = new Rect(); paint.getTextBounds(date, 0, date.length(), bounds); int x = (bitmap.getWidth() - bounds.width()); canvas.drawText(date, x - 10, bitmap.getHeight() - 10, paint); canvas.save(); return bitmap; }
2.如果是从图库选择的照片，我们需要先获取照片拍摄日期，然后再将日期画上去，代码如下：
//从图库选择 private void fromGallery(Intent data, OnFilishedListener listener) { Uri uri = data.getData(); String[] filePathColumn = {MediaStore.Images.Media.DATA , MediaStore.Images.Media.DATE_TAKEN}; Cursor cursor = null; if (uri == null) return; if (uri.getScheme().contains("file")) { Long fileTime = (new File(uri.getPath())).lastModified(); String dateTime = TimeUtil.longToDate1(fileTime); Log.i("wtt","照片拍摄日期为dateTime: " + dateTime); saveSelectPic( dateTime , uri.getPath(), listener); } else if (uri.getScheme().contains("content")) { if (fragment != null) { cursor = fragment.getActivity().getContentResolver() .query(uri, filePathColumn, null, null, null); } else { cursor = activity.getContentResolver(). query(uri,filePathColumn, null, null, null); } if (cursor.moveToFirst()) { int columnIndex = cursor.getColumnIndex(filePathColumn[0]); String picturePath = cursor.getString(columnIndex); int dateIndex = cursor.getColumnIndexOrThrow(filePathColumn[1]); String date = cursor.getString(dateIndex); if (TextUtils.isEmpty(date)) { date = TimeUtil.getStringDate1(); }else{ date = TimeUtil.longToDate1(Long.parseLong(date)); } cursor.close(); saveSelectPic(date , picturePath, listener); } else { listener.onFilish(null); } } }
/** * 保存圖片 * * @param picPath * @param listener */ private void saveSelectPic(String date, String picPath, OnFilishedListener listener) { if (TextUtils.isEmpty(picPath)) { listener.onFilish(null); return; } Bitmap bitmap = BitmapUtils.scaleBitmap(picPath); bitmap = BitmapUtils.drawDate2Bitmap( date , bitmap); try { picPath = BitmapUtils.saveBitmap(bitmap); listener.onFilish(picPath); } catch (Exception e) { e.printStackTrace(); Log.e("保存图片", "图片保存失败"); listener.onFilish(null); } }
public static Bitmap drawDate2Bitmap(String date , Bitmap bitmap) { Bitmap.Config bitmapConfig = bitmap.getConfig(); // set default bitmap config if none if (bitmapConfig == null) { bitmapConfig = Bitmap.Config.ARGB_8888; } bitmap = bitmap.copy(bitmapConfig, true); // 获取可改变的位图 Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); // text color - #3D3D3D paint.setColor(Color.RED); // text size in pixels paint.setTextSize(30); // text shadow // paint.setShadowLayer(1f, 0f, 1f, Color.WHITE); Rect bounds = new Rect(); paint.getTextBounds(date, 0, date.length(), bounds); int x = (bitmap.getWidth() - bounds.width()); canvas.drawText(date, x - 10, bitmap.getHeight() - 10, paint); canvas.save(); return bitmap; }
