Android 图片获取显示照片拍摄时间

飞奔的炮台

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;
  }

基本实现方式都在代码里面了，大家如果还有其他问题欢迎加入我的qq群讨论交流：开发一群：454430053 开发二群：537532956