我试图让用户从图库中选择个人资料图片。我的问题是有些图片向右旋转。
我像这样启动图像选择器:
Intent photoPickerIntent = new Intent();
photoPickerIntent.setType("image/*");
photoPickerIntent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(photoPickerIntent, "Select profile picture"), Global.CODE_SELECT_PICTURE);
我从 onActivityResult 获取图像,如下所示:
Uri selectedPicture = data.getData();
profilePic = MediaStore.Images.Media.getBitmap(activity.getContentResolver(), selectedPicture);
我怎样才能使图像不旋转?
UPDATE:
根据我收到的一些有用的答案,我设法提出了以下工作解决方案(这只是一个工作代码,写得不好)。我很想得到您关于如何改进它的反馈!
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == Activity.RESULT_OK && requestCode == Global.CODE_SELECT_PICTURE) {
// Get selected gallery image
Uri selectedPicture = data.getData();
// Get and resize profile image
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = activity.getContentResolver().query(selectedPicture, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Bitmap 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;
}
}
}
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);
}