Change nav bar style.

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

<!--

    Copyright (C) 2016 The Android Open Source Project

    Licensed under the Apache License, Version 2.0 (the "License");

    you may not use this file except in compliance with the License.

    You may obtain a copy of the License at

         http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software

    distributed under the License is distributed on an "AS IS" BASIS,

    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    See the License for the specific language governing permissions and

    limitations under the License.

-->

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

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical">

    <FrameLayout

        android:id="@+id/suw_main_content"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1" />

    <com.android.setupwizardlib.view.NavigationBar

        android:id="@+id/suw_navigation_bar"

        style="@style/SuwNavBarTheme"

        android:layout_width="match_parent"

        android:layout_height="@dimen/suw_navbar_height" />

</LinearLayout>

package com.android.settings.accessibility;

import android.app.Fragment;

import android.app.FragmentTransaction;

import android.os.Bundle;

import android.support.v4.widget.DrawerLayout;

import android.text.TextUtils;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import com.android.settings.R;

import com.android.settings.SettingsActivity;

import com.android.settings.SettingsPreferenceFragment;

import com.android.setupwizardlib.util.SystemBarHelper;

import com.android.setupwizardlib.view.NavigationBar;

public class AccessibilitySettingsForSetupWizardActivity extends SettingsActivity {

    @Override

    protected void onCreate(Bundle savedState) {

        super.onCreate(savedState);

        getActionBar().setDisplayHomeAsUpEnabled(true);

        setIsDrawerPresent(false);

        // Hide System Nav Bar

        SystemBarHelper.hideSystemBars(getWindow());

        // Show SUW Nav Bar

        setContentView(R.layout.accessibility_settings_for_suw);

        NavigationBar navigationBar = (NavigationBar) findViewById(R.id.suw_navigation_bar);

        navigationBar.getNextButton().setVisibility(View.GONE);

        navigationBar.setNavigationBarListener(new NavigationBar.NavigationBarListener() {

            @Override

            public void onNavigateBack() {

                onNavigateUp();

            }

            @Override

            public void onNavigateNext() {

                // Do nothing. We don't show this button.

            }

        });

    }

    @Override

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

    public boolean onNavigateUp() {

        onBackPressed();

        return true;

    }

    @Override

    public void startPreferencePanel(String fragmentClass, Bundle args, int titleRes,

            CharSequence titleText, Fragment resultTo, int resultRequestCode) {

        // Set the title.

        if (!TextUtils.isEmpty(titleText)) {

            setTitle(titleText);

        } else if (titleRes > 0) {

            setTitle(getString(titleRes));

        }

        // Start the new Fragment.

        args.putInt(SettingsPreferenceFragment.HELP_URI_RESOURCE_KEY, 0);

        startPreferenceFragment(Fragment.instantiate(this, fragmentClass, args), true);

    }

    /**

     * Start a new fragment.

     *

     * @param fragment The fragment to start

     * @param push If true, the current fragment will be pushed onto the back stack.  If false,

     * the current fragment will be replaced.

     */

    @Override

    public void startPreferenceFragment(Fragment fragment, boolean push) {

        FragmentTransaction transaction = getFragmentManager().beginTransaction();

        transaction.replace(R.id.suw_main_content, fragment);

        if (push) {

            transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);

            transaction.addToBackStack(BACK_STACK_PREFS);

        } else {

            transaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);

        }

        transaction.commitAllowingStateLoss();

    }

}