[英]Gallery images get rotated when saved
我一直试图将图像保存到Firebase Storage
但是我注意到从Gallery / Google云端硬盘保存的几乎所有图片都会旋转(通常旋转90度)
通过旧帖子阅读中,我意识到,这是一个常见的问题,我试图从这个尝试任何一个解决方案解决它后 ,或从本一个 ,这一个 ,我可以继续下去。
大约8个小时后,我终于决定在这里提问。 是否有更好,更轻松的实现来阻止图像旋转?
我最后一次使用ExifInterface
( ExifInterface
返回0)的(显然是不成功的)实现是这样的:
选择图片
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_PICK);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
OnActivityResult
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
Uri selectedImage = data.getData();
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContext().getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String filePath = cursor.getString(columnIndex);
cursor.close();
int rotateImageAngle = getPhotoOrientation(getContext(), selectedImage, filePath);
try {
bitmap = MediaStore.Images.Media.getBitmap(getContext().getContentResolver(), selectedImage);
// Log.d(TAG, String.valueOf(bitmap));
addPictureButton.setText("Done");
} catch (IOException e) {
e.printStackTrace();
}
if( bitmap != null)
{
RotateBitmap(bitmap , rotateImageAngle);
}
}
辅助方法
public int getPhotoOrientation(Context context, Uri imageUri, String imagePath){
int rotate = 0;
try {
context.getContentResolver().notifyChange(imageUri, null);
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;
}
Log.i("RotateImage", "Exif orientation: " + orientation);
Log.i("RotateImage", "Rotate value: " + rotate);
} catch (Exception e) {
e.printStackTrace();
}
return rotate;
}
public static Bitmap RotateBitmap(Bitmap source, int angle)
{
Matrix matrix = new Matrix();
matrix.postRotate(angle);
return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
}
注意:如果需要,我将添加将图像上传到Firebase的代码
感谢这篇文章,我找到了解决方案。
我将在下面发布该代码的修改后的工作版本,以供有此问题的任何人参考。
从图库中启动图片选择
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(intent, PICK_IMAGE_REQUEST);
OnActivityResult检查所选图片的原始样式
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK && requestCode == PICK_IMAGE_REQUEST) {
// Get selected gallery image
Uri selectedPicture = data.getData();
// Get and resize profile image
String[] filePathColumn = {MediaStore.Images.Media.DATA};
// TRY getactvity() as well if not work
Cursor cursor = getContext().getContentResolver().query(selectedPicture, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
loadedBitmap = BitmapFactory.decodeFile(picturePath);
ExifInterface exif = null;
try {
File pictureFile = new File(picturePath);
exif = new ExifInterface(pictureFile.getAbsolutePath());
} catch (IOException e) {
e.printStackTrace();
}
int orientation = ExifInterface.ORIENTATION_NORMAL;
if (exif != null)
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
switch (orientation) {
case ExifInterface.ORIENTATION_ROTATE_90:
loadedBitmap = rotateBitmap(loadedBitmap, 90);
break;
case ExifInterface.ORIENTATION_ROTATE_180:
loadedBitmap = rotateBitmap(loadedBitmap, 180);
break;
case ExifInterface.ORIENTATION_ROTATE_270:
loadedBitmap = rotateBitmap(loadedBitmap, 270);
break;
}
imageView.setImageBitmap(loadedBitmap);
}
}
RotateBitmap方法
public static Bitmap rotateBitmap(Bitmap bitmap, int degrees) {
Matrix matrix = new Matrix();
matrix.postRotate(degrees);
return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
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