Shared Element Transition Android Doesn't Work

问题

I'm trying to to this for a day but i don't know what is the problem! I have an activity with two fragments which in the first one i have a RecyclerView contains an imageview and on the other fragment i have another imageview.

custom view layer imageview:

<ImageView
    android:id="@+id/clst_img_cover"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:scaleType="centerCrop"
    app:srcCompat="@drawable/no_image"
    android:transitionName="@string/transition_name_cover"/>

fragment two imageview:

<ImageView
        android:id="@+id/img_movie_cover"
        android:transitionName="@string/transition_name_cover"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop"
        android:src="@color/colorWhite" />

and in my adapter for the list view:

MovieDetailsFragment movieDetails = new 
MovieDetailsFragment().newInstance(String.valueOf(model.getId()));
FragmentManager manager = ((MainActivity)v.getContext()).getFragmentManager();
FragmentTransaction transaction = manager.beginTransaction();
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    String a = v.getContext().getResources().getString(R.string.transition_name_cover);
    cover.setTransitionName(a);
    movieDetails = new MovieDetailsFragment().newInstance(String.valueOf(model.getId()),((BitmapDrawable)cover.getDrawable()).getBitmap());
    Transition changeTransform = TransitionInflater.from(context).inflateTransition(R.transition.default_transition);
    changeTransform.setDuration(1500);
    MovieList current = (MovieList) manager.findFragmentById(R.id.activity_main_container_body);
    movieDetails.setSharedElementReturnTransition(new CustomTransition());
    movieDetails.setSharedElementEnterTransition(new CustomTransition());
    movieDetails.setEnterTransition(new Fade());
    current.setExitTransition(new Fade());
    String x = cover.getTransitionName();
    transaction.addSharedElement(cover,a);
}
else{
    transaction.setCustomAnimations(R.animator.fr_fade_in,R.animator.fr_slide_out_right,R.animator.fr_slide_in_right,R.animator.fr_fade_out);
}
transaction.replace(R.id.activity_main_container_body,movieDetails,"movieDetails");
transaction.addToBackStack(null);
transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
transaction.commit();

and my second fragment has two newInstance method like this:

public static MovieDetailsFragment newInstance(String Movie_ID) {
    MovieDetailsFragment fragment = new MovieDetailsFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, Movie_ID);
    fragment.setArguments(args);
    return fragment;
}

public static MovieDetailsFragment newInstance(String Movie_ID,Bitmap bmp) {
    MovieDetailsFragment fragment = new MovieDetailsFragment();
    Bundle args = new Bundle();
    args.putString(ARG_PARAM1, Movie_ID);
    args.putParcelable(ARG_PARAM2, bmp);
    fragment.setArguments(args);
    return fragment;
}

and this is CustomTransition.java :

@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public class CustomTransition extends TransitionSet {
    public  CustomTransition(){
        setOrdering(ORDERING_TOGETHER);
        addTransition(new ChangeBounds()).addTransition(new ChangeTransform()).addTransition(new ChangeImageTransform());
    }
}

it acts for the fade but doesn't work for the image!

Update I suggest to use this example in my git repository, its a great example for beginners.

回答1:

Please go through this link and the link to his github is here. It has answers to all your queries. I had followed the same link.

回答2:

Finally, i fined my ****ing mistake after a week.

It's Best To Use android.support.v4.app.Fragment thats why it wasn't work

i mixed between android.support.v4.app.Fragment and android.app.Fragment

i highly recommend you to use this tutorial, specially download the git repository

来源：https://stackoverflow.com/questions/48489819/shared-element-transition-android-doesnt-work