SettingsActivity.java

package com.ui.main;

import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.annotation.LayoutRes;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatDelegate;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;

import com.C;
import com.app.annotation.apt.Router;

@Router(C.SETTING)
public class SettingsActivity extends PreferenceActivity {
    private AppCompatDelegate mDelegate;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        getDelegate().installViewFactory();
        getDelegate().onCreate(savedInstanceState);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setting);
        setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
        addPreferencesFromResource(R.xml.settings);
        Toolbar toolbar = (Toolbar) this.findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        mDelegate.getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

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

    @Override
    public void setContentView(@LayoutRes int layoutResID) {
        getDelegate().setContentView(layoutResID);
    }

    @Override
    protected void onPostResume() {
        super.onPostResume();
        getDelegate().onPostResume();
    }

    @Override
    protected void onStop() {
        super.onStop();
        getDelegate().onStop();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        getDelegate().onDestroy();
    }

    private void setSupportActionBar(@Nullable Toolbar toolbar) {
        getDelegate().setSupportActionBar(toolbar);
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) onBackPressed();
        return super.onOptionsItemSelected(item);
    }
}