Question

使用以下代码从图库中挑选图片：

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
intent.setType("*/*");
intent.addCategory(Intent.CATEGORY_OPENABLE);
startActivityForResult(intent, PICK_FILE_RESULT_CODE);

使用以下代码获得结果：

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == PICK_FILE_RESULT_CODE) {
        if (resultCode == RESULT_OK && data != null && data.getData() != null) {
            // Get the Uri of the selected file
            Uri uri = data.getData();

            //Using Picasso to load uri to imageView
            //Image is in landscape even if it was taken in portrait

        }
    }
}

该代码适用于HTC和Nexus手机，但仅适用于三星设备（Galaxy 5和Galaxy 5 mini），如果照片是以肖像拍摄的，则方向错误。在查看ExifInterface时，方向是未定义的。

File imageFile = new File(uri.getPath());
ExifInterface exif = new ExifInterface(
imageFile.getAbsolutePath());
int orientation = exif.getAttributeInt(
                ExifInterface.TAG_ORIENTATION,
                ExifInterface.ORIENTATION_NORMAL);
//orientation is always 0 for samsung devices = ORIENTATION_UNDEFINED

如何正确显示图像？另外确定正确的方向以便我可以旋转图像？

Answer 1

我能够通过以下代码获得方向：

public static int getExifOrientation(Context context, Uri uri) {
    ContentResolver contentResolver = context.getContentResolver();
    Cursor cursor = null;
    try {
        String id = DocumentsContract.getDocumentId(uri);
        id = id.split(":")[1];
        cursor = contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                CONTENT_ORIENTATION, MediaStore.Images.Media._ID + " = ?", new String[] { id }, null);
        if (cursor == null || !cursor.moveToFirst()) {
            return 0;
        }
        return cursor.getInt(0);
    } catch (RuntimeException ignored) {
        // If the orientation column doesn't exist, assume no rotation.
        return 0;
    } finally {
        if (cursor != null) {
            cursor.close();
        }
    }
}

https://vikaskanani.wordpress.com/2011/07/17/android-re-size-image-without-loosing-exif-information/

即使以肖像拍摄，三星机器人拍摄的图库图像也始终处于风景中

1 个答案: