SettingsActivity.java

package com.fastbootmobile.encore.providers.bassboost;

import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.annotation.LayoutRes;
import android.support.annotation.Nullable;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatDelegate;
import android.support.v7.widget.Toolbar;
import android.view.LayoutInflater;
import android.view.MenuInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

import com.fastbootmobile.encore.app.R;

/**
 * A {@link PreferenceActivity} that presents a set of application settings. On
 * handset devices, settings are presented as a single list. On tablets,
 * settings are split by category, with category headers shown to the left of
 * the list of settings.
 * <p>
 * See <a href="http://developer.android.com/design/patterns/settings.html">
 * Android Design: Settings</a> for design guidelines and the <a
 * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
 * API Guide</a> for more information on developing a Settings UI.
 */
public class SettingsActivity extends PreferenceActivity {

    private AppCompatDelegate mDelegate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_LEANBACK)) {
            // On TV? Start the leanback settings
            startActivity(new Intent(this, LeanbackSettingsActivity.class));
            finish();
        }

        getDelegate().installViewFactory();
        getDelegate().onCreate(savedInstanceState);
        super.onCreate(savedInstanceState);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        getDelegate().onPostCreate(savedInstanceState);
        setupSimplePreferencesScreen();

        LinearLayout root = (LinearLayout)findViewById(android.R.id.list).getParent().getParent().getParent();
        Toolbar bar = (Toolbar) LayoutInflater.from(this).inflate(R.layout.toolbar_settings, root, false);
        bar.setTitle(R.string.bass_boost_settings_title);
        root.addView(bar, 0); // insert at top
        bar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }

    public ActionBar getSupportActionBar() {
        return getDelegate().getSupportActionBar();
    }
    public void setSupportActionBar(@Nullable Toolbar toolbar) {
        getDelegate().setSupportActionBar(toolbar);
    }
    @Override
    public MenuInflater getMenuInflater() {
        return getDelegate().getMenuInflater();
    }
    @Override
    public void setContentView(@LayoutRes int layoutResID) {
        getDelegate().setContentView(layoutResID);
    }
    @Override
    public void setContentView(View view) {
        getDelegate().setContentView(view);
    }
    @Override
    public void setContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().setContentView(view, params);
    }
    @Override
    public void addContentView(View view, ViewGroup.LayoutParams params) {
        getDelegate().addContentView(view, params);
    }
    @Override
    protected void onPostResume() {
        super.onPostResume();
        getDelegate().onPostResume();
    }
    @Override
    protected void onTitleChanged(CharSequence title, int color) {
        super.onTitleChanged(title, color);
        getDelegate().setTitle(title);
    }
    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        getDelegate().onConfigurationChanged(newConfig);
    }
    @Override
    protected void onStop() {
        super.onStop();
        getDelegate().onStop();
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        getDelegate().onDestroy();
    }
    public void invalidateOptionsMenu() {
        getDelegate().invalidateOptionsMenu();
    }

    /**
     * Shows the simplified settings UI if the device configuration if the
     * device configuration dictates that a simplified, single-pane UI should be
     * shown.
     */
    private void setupSimplePreferencesScreen() {
        // Add 'general' preferences.
        addPreferencesFromResource(R.xml.pref_bassboost);
    }

    private AppCompatDelegate getDelegate() {
        if (mDelegate == null) {
            mDelegate = AppCompatDelegate.create(this, null);
        }
        return mDelegate;
    }

}