Android Lollipop Camera2 api改变app的方向

Question

I am creating an application and part of it is where the user can change their profile picture either by taking a picture or using one from the native gallery.

So I'm using the native camera and I'm using the following lines of code to open the camera view

  Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(image_saved_destination));
        startActivityForResult(intent, CAMERA_REQUEST_CODE);

So with this it keeps overwriting the same file on the external storage.

This was working fine until I updated my os on one of my devices to lollipop. Now when I use the camera if I keep it in held in portrait and take the pic and save the orientation when it returns to my app flips from landscape to portrait. However, when the camera is open and if I hold the phone in landscape and take the pic and click save, it returns to the app with no orientation abnormalities.

Due to the orientation being changed and changed back I lose the state of the activity so my variables etc are lost, which are needed for processing the image data.

Has anyone encountered this?

Answer 1

The ACTION_IMAGE_CAPTURE intent and the rotation between activity changes, are not related to the new Android camera2 API at all. This is just standard behavior of Android's intent system and switching between activities.

It sounds like the new OS comes with a new version of the native camera app, which has changed its behavior in terms of managing screen orientation. You should look into the standard approaches with managing orientation and other configuration changes: http://developer.android.com/guide/components/activities.html#ConfigurationChanges

Those will allow you to either handle the orientation change yourself instead of the OS restarting your activity, or allow you to stash your private data into a bundle that is given to you in onCreate.

Answer 2

更好你使用相机API创建自己的自定义相机。如果你再次遇到相同的问题，你可以使用相机预览的 setDisplayOrientation。更多访问Android - 相机预览侧身