捕获的照片方向在 android 中发生了变化 [英] Captured Photo orientation is changing in android

问题描述

我正在通过单击按钮打开相机应用程序.并在下一个活动中显示拍摄的照片.但拍摄的照片旋转了 90 度.当我在捕获图像后在视图中显示图像时，它的方向始终是横向的.为什么在人像模式下拍摄的照片没有以人像模式显示?

I'am opening camera app on click of a button. And displaying the captured photo in next activity. But the captured photo is rotating by 90 degrees. When I display the image in a view after I capture it, it's orientation is always landscape. Why is the photo not being shown in portrait as is when the photo is taken in portrait mode?

点击按钮:

Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
i.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(APP_DIR+"/latest.png")));       
startActivityForResult(i, CAPTURE_PHOTO_CONSTANT);

onActvityresult 内部:

Inside onActvityresult:

bmp = BitmapFactory.decodeFile(APP_DIR+"/latest.png");
startActivity(new Intent(this, DisplayActivity.class));

显示拍摄的照片:

photoViewRelativeLayout.setBackgroundDrawable(new BitmapDrawable(getResources(), CaptureActivity.bmp));

推荐答案

我在三星手机上遇到过同样的问题.显然三星手机设置了 EXIF 方向标签，而不是旋转单个像素.使用 BitmapFactory 读取位图不会支持这个标签.我发现这个问题的解决方案是在活动的 onActivityResult 方法中使用 ExifInterface.它检查与从相机捕获的图像的 URI 关联的方向.

I had the same problem mostly with the Samsung handsets.Apparently Samsung phones set the EXIF orientation tag, rather than rotating individual pixels.Reading the Bitmap using BitmapFactory does not support this tag.What i found the solution to this problem was using ExifInterface in onActivityResult method of the activity.Which checks for orientation associated with URI of the captured image from the camera.

                        int rotate = 0;
                        try {
                            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.v(Common.TAG, "Exif orientation: " + orientation);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                        /****** Image rotation ****/
                        Matrix matrix = new Matrix();
                        matrix.postRotate(orientation);
                        Bitmap cropped = Bitmap.createBitmap(scaled, x, y, width, height, matrix, true);

这篇关于捕获的照片方向在 android 中发生了变化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！