7

在下面的代码中，我尝试使用本机相机拍照并上传到服务器，但是当我将其作为纵向并在图库中以横向查看时，这意味着它旋转了 90 度。请帮助：-

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

startActivityForResult(intent, REQUEST_CAMERA);

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == Activity.RESULT_OK) {
        if (requestCode == REQUEST_CAMERA) {

            handleCameraPhoto();
}
private void handleCameraPhoto() {
    Intent mediaScanIntent = new Intent(
            "android.intent.action.MEDIA_SCANNER_SCAN_FILE");
    File f = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(f);

    mediaScanIntent.setData(contentUri);
    getActivity().sendBroadcast(mediaScanIntent);
}

如何在保存到 SD 卡之前旋转图像？

4

2 回答 2

22

在列表视图中显示图像时，我也遇到了这种问题。但是使用 EXIF 数据，我能够将图像设置为正确的方向。

这是准备显示的位图对象：

  Matrix matrix = new Matrix();
  matrix.postRotate(getImageOrientation(url));
  Bitmap rotatedBitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
  bitmap.getHeight(), matrix, true);

这是上面代码第二行中用于旋转图像方向的方法。

 public static int getImageOrientation(String imagePath){
     int rotate = 0;
     try {

         File imageFile = new File(imagePath);
         ExifInterface exif = new ExifInterface(
                 imageFile.getAbsolutePath());
         int orientation = exif.getAttributeInt(
                 ExifInterface.TAG_ORIENTATION,
                 ExifInterface.ORIENTATION_NORMAL);

         switch (orientation) {
         case ExifInterface.ORIENTATION_ROTATE_270:
             rotate = 270;
             break;
         case ExifInterface.ORIENTATION_ROTATE_180:
             rotate = 180;
             break;
         case ExifInterface.ORIENTATION_ROTATE_90:
             rotate = 90;
             break;
         }
     } catch (IOException e) {
         e.printStackTrace();
     }
    return rotate;
 }

这可能不是您问题的准确答案，它对我有用，希望对您有用。

于 2013-10-22T08:41:11.103 回答
2 
Matrix matrix=new Matrix();
imageView.setScaleType(ScaleType.MATRIX);   //required
matrix.postRotate((float) angle, pivX, pivY);
imageView.setImageMatrix(matrix);



This method does not require creating a new bitmap each time.. Hope this works.
于 2013-10-22T07:34:40.787 回答