Question

我对使用手机相机拍摄的照片有些疑问。当我拍照并保存时，我的手机会以原始尺寸显示，但当我尝试在我的应用程序上打开相同的照片时，它会输出一张旋转的照片，就像这样：

原始照片：

旋转照片：

enter image description here

只有在用手机拍照时才会出现此问题。

我使用以下代码选择图库：

private void selectImage() {

        final CharSequence[] options = {"My gallery","Cancel" };

        AlertDialog.Builder builder = new AlertDialog.Builder(PhotosActivity.this);
        builder.setTitle("Add Photo!");
        builder.setItems(options, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int item) {
                if (options[item].equals("My gallery"))
                {
                    Intent intent = new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                    startActivityForResult(intent, 2);

                }
                else if (options[item].equals("Cancel")) {
                    dialog.dismiss();
                }
            }
        });
        builder.show();
    }

选择照片：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
       if (requestCode == 2) {

            Uri selectedImage = data.getData();
            String[] filePath = { MediaStore.Images.Media.DATA };
            Cursor c = getContentResolver().query(selectedImage,filePath, null, null, null);
            c.moveToFirst();
            int columnIndex = c.getColumnIndex(filePath[0]);
            String picturePath = c.getString(columnIndex);
            c.close();
            Bitmap thumbnail = (BitmapFactory.decodeFile(picturePath));

            if (thumbnail.getWidth() > thumbnail.getHeight()) {
                Matrix matrix = new Matrix();
                matrix.postRotate(90);
                thumbnail = Bitmap.createBitmap(thumbnail , 0, 0, thumbnail.getWidth(), thumbnail.getHeight(), matrix, true);
            }

            int nh = (int) ( thumbnail.getHeight() * (612.0 / thumbnail.getWidth()) );
            Bitmap scaled = Bitmap.createScaledBitmap(thumbnail, 612, nh, true);

            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            scaled.compress(Bitmap.CompressFormat.JPEG, 90, stream);

            byte [] byte_arr = stream.toByteArray();
            String image_str = Base64.encodeBytes(byte_arr);

            newtask = new saveImage();
            newtask.execute(image_str,sessionid);

            Toast.makeText(getBaseContext(), "Nice!",
            Toast.LENGTH_LONG).show();

        }
    }
}

我尝试使用以下代码修复它，但它不适用于横向照片，我想获得一个代码来输出原始尺寸。

if (thumbnail.getWidth() > thumbnail.getHeight()) {
                    Matrix matrix = new Matrix();
                    matrix.postRotate(90);
                    thumbnail = Bitmap.createBitmap(thumbnail , 0, 0, thumbnail.getWidth(), thumbnail.getHeight(), matrix, true);
                }

感谢。

Answer 1

您需要从mediastore查询方向（它是ImageColumns.ORIENTATION）请尝试更改此行：matrix.postRotate(90);至matrix.postRotate(270);

自动旋转智能手机

1 个答案: