Fix search highlighting items

<?xml version="1.0" encoding="utf-8"?>

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<ripple xmlns:android="http://schemas.android.com/apk/res/android"

    android:color="?android:attr/colorControlHighlight">

    <item android:id="@android:id/mask"

          android:drawable="@android:color/white" />

</ripple>

import android.graphics.drawable.Drawable;

import android.os.Bundle;

import android.support.v7.preference.Preference;

import android.support.v7.preference.PreferenceGroup;

import android.support.v7.preference.PreferenceGroupAdapter;

import android.support.v7.preference.PreferenceScreen;

import android.support.v7.preference.PreferenceViewHolder;

import android.support.v7.widget.LinearLayoutManager;

import android.support.v7.widget.RecyclerView;

import android.text.TextUtils;

import android.util.Log;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import com.android.settings.applications.LayoutPreference;

import com.android.settings.widget.FloatingActionButton;

public abstract class SettingsPreferenceFragment extends InstrumentedPreferenceFragment

        implements DialogCreatable {

    private static final String TAG = "SettingsPreferenceFragment";

    private static final String TAG = "SettingsPreference";

    private static final int DELAY_HIGHLIGHT_DURATION_MILLIS = 600;

    private String mPreferenceKey;

    private boolean mPreferenceHighlighted = false;

    private Drawable mHighlightDrawable;

    private RecyclerView.Adapter mCurrentRootAdapter;

    private boolean mIsDataSetObserverRegistered = false;

    private LayoutPreference mFooter;

    private View mEmptyView;

    private LinearLayoutManager mLayoutManager;

    private HighlightablePreferenceGroupAdapter mAdapter;

    @Override

    public void onCreate(Bundle icicle) {

        updateEmptyView();

    }

    private Drawable getHighlightDrawable() {

        if (mHighlightDrawable == null) {

            mHighlightDrawable = getActivity().getDrawable(R.drawable.preference_highlight);

        }

        return mHighlightDrawable;

    }

    public LayoutPreference getHeaderView() {

        return mHeader;

    }

        return -1;

    }

    private void highlightPreference(String key) {

        final Drawable highlight = getHighlightDrawable();

    @Override

    public RecyclerView.LayoutManager onCreateLayoutManager() {

        mLayoutManager = new LinearLayoutManager(getContext());

        return mLayoutManager;

    }

    @Override

    protected RecyclerView.Adapter onCreateAdapter(PreferenceScreen preferenceScreen) {

        mAdapter = new HighlightablePreferenceGroupAdapter(preferenceScreen);

        return mAdapter;

    }

    private void highlightPreference(String key) {

        final int position = canUseListViewForHighLighting(key);

        if (position >= 0) {

            mPreferenceHighlighted = true;

            mLayoutManager.scrollToPosition(position);

            // TODO: Need to find a way to scroll to and highlight search items now

            // that we are using RecyclerView instead.

//            final RecyclerView listView = getListView();

//            final RecyclerView.Adapter adapter = listView.getAdapter();

//

////            ((PreferenceGroupAdapter) adapter).setHighlightedDrawable(highlight);

////            ((PreferenceGroupAdapter) adapter).setHighlighted(position);

//

//            listView.post(new Runnable() {

//                @Override

//                public void run() {

//                    listView.setSelection(position);

//                    listView.postDelayed(new Runnable() {

//                        @Override

//                        public void run() {

//                            final int index = position - listView.getFirstVisiblePosition();

//                            if (index >= 0 && index < listView.getChildCount()) {

//                                final View v = listView.getChildAt(index);

//                                final int centerX = v.getWidth() / 2;

//                                final int centerY = v.getHeight() / 2;

//                                highlight.setHotspot(centerX, centerY);

//                                v.setPressed(true);

//                                v.setPressed(false);

//                            }

//                        }

//                    }, DELAY_HIGHLIGHT_DURATION_MILLIS);

//                }

//            });

            getView().postDelayed(new Runnable() {

                @Override

                public void run() {

                    mAdapter.highlight(position);

                }

            }, DELAY_HIGHLIGHT_DURATION_MILLIS);

        }

    }

            return false;

        }

    }

    public static class HighlightablePreferenceGroupAdapter extends PreferenceGroupAdapter {

        private int mHighlightPosition = -1;

        public HighlightablePreferenceGroupAdapter(PreferenceGroup preferenceGroup) {

            super(preferenceGroup);

        }

        public void highlight(int position) {

            mHighlightPosition = position;

            notifyDataSetChanged();

        }

        @Override

        public void onBindViewHolder(PreferenceViewHolder holder, int position) {

            super.onBindViewHolder(holder, position);

            if (position == mHighlightPosition) {

                View v = holder.itemView;

                if (v.getBackground() != null) {

                    final int centerX = v.getWidth() / 2;

                    final int centerY = v.getHeight() / 2;

                    v.getBackground().setHotspot(centerX, centerY);

                }

                v.setPressed(true);

                v.setPressed(false);

                mHighlightPosition = -1;

            }

        }

    }

}