TrackSelction Button Click snippet

track_selection_text.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                MappingTrackSelector.MappedTrackInfo mappedTrackInfo = trackSelector.getCurrentMappedTrackInfo();
                if (mappedTrackInfo != null) {
                    //CharSequence title = ((Button) view).getText();
                    //int rendererIndex = (int) v.getTag();
                    int rendererType = mappedTrackInfo.getRendererType(0);
                    boolean allowAdaptiveSelections =
                            rendererType == C.TRACK_TYPE_VIDEO
                                    || (rendererType == C.TRACK_TYPE_AUDIO
                                    && mappedTrackInfo.getTypeSupport(C.TRACK_TYPE_VIDEO)
                                    == MappingTrackSelector.MappedTrackInfo.RENDERER_SUPPORT_NO_TRACKS);
                    Pair<AlertDialog, TrackSelection> dialogPair = TrackSelection
                                    .getDialog(activity, "Video", trackSelector, 0, VideoPlayer.this,
                                            track_selection_text.getText().toString(), player.getVideoFormat());
                    dialogPair.second.setShowDisableOption(false);
                    dialogPair.second.setAllowAdaptiveSelections(allowAdaptiveSelections);
                    dialogPair.first.show();
                }
            }
        });

You'll have to open "exo_track_selection_view" XML and then change the package name (path name)to your custom TrackSelector.java
you'll find something like below in the XML

`

<X.Y.Z.TrackSelection
    android:id="@+id/exo_track_selection_init_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="vertical" />

`

you need to change X.Y.Z.Trackselection to com.maxtv.activity.tv.TrackSelection

So if i am doing this , i am not able to set my player

how to open exo_track_selection_dialog.xml and change to TrackSelection.
im getting this error
java.lang.ClassCastException: androidx.viewpager.widget.ViewPager cannot be cast to co.appmastery.worldbbtv.downloader.TrackSelection E/AndroidRuntime(30347): at co.appmastery.worldbbtv.downloader.TrackSelection.getDialog(TrackSelection.java:70) E/AndroidRuntime(30347): at co.appmastery.worldbbtv.PlayerActivity.test(PlayerActivity.java:909)

Any fix with the resoultion like youtube only 720 , 360 etc?