Setting the orientation for only 1 fragment in my activity while the rest is in portrait

问题

My app needs to be in portrait mode so I set it in the manifest by:

android:screenOrientation="portrait"

But I just recently added another fragment (FragA) that just looks and functions 10x better in landscape. Is there something I can put inside of my FragA to just make that fragment in landscape while retaining the rest of the app in portrait or by doing this will I have to add something to my other fragments to keep them retained as portrait?

回答1:

Orientation attribute is per activity so you can declare the orientation for only the activity that contains the fragment so that it is in landscape and the rest of the activities will remain as they are.

回答2:

Use the following code line in the fragment where you want a specific (in this case portrait) orientation.

getActivity().setRequestedOrientation(
            ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

If you want to have a orientation in a fragment, that is based on the way the user holds his device, then use the following code line.

getActivity().setRequestedOrientation(
                ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);

Hope, this will give you the intended solution.

回答3:

In each of your fragments, set the requested orientation.

Reference doc: http://developer.android.com/reference/android/content/pm/ActivityInfo.html

@Override
public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);

   // Fragment locked in portrait screen orientation
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);    

   // Fragment locked in landscape screen orientation
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

   // Fragment screen orientation normal both portait and landscape       
   getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}

回答4:

So I'm dealing with this issue now. We have only portrait mode application (for now). But there is one fragment that needs to be in landscape. We are using single Activity approach so the accepted answer will not help me.

The fastest solution I could think of is this one.

private var swappingOrientation = false

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)

    if(savedInstanceState == null) {
        swappingOrientation = true
        activity?.apply {
            requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE
        }
    }
}

override fun onDestroy() {
    super.onDestroy()

    if(!swappingOrientation) {
        activity?.apply {
            requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT
        }
    }
    swappingOrientation = false
}

You hold the information if you are swapping orientation or not in swappingOrientation variable. At the beggining when the fragment is created it will change orientation, only when there is no saved state. And orientation is changed back again only when it is not being currently changed.

This is a super quick solution and it can produce screen blinking when you return to previous fragment. I also did not fully test it so it can have other issues, so keep that in mind.

回答5:

In your fragment FragA :

@Override
public void onResume() {
    super.onResume();
    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

}


@Override
public void onPause() {
    getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
    super.onPause();
}

onPause method code ensure your activity back to portrait orientation

回答6:

First Fragment:

@Override
    public void onResume() {
        super.onResume();
        getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

    }

Second Fragment:

     @Override
        public void onResume() {
            super.onResume();
 getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
   }

回答7:

This is old question but answering this just incase anyone wanted the solution as the OP needed. The simple way to achieve this is as follows.

public class SampleFragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
       ...

       getActivity().setRequestedOrientation(
                ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

       ...
    }

   @Override
   public View onDestroyView() {
       super.onDestroyView();
       ...

       getActivity().setRequestedOrientation(
                ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

       ...
    }

}

来源：https://stackoverflow.com/questions/12704009/setting-the-orientation-for-only-1-fragment-in-my-activity-while-the-rest-is-in

标签

android

android-fragments

orientation