BaseActionBarActivity

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.View.OnClickListener;

import com.techfrontier.demo.R;

public abstract class BaseActionBarActivity extends ActionBarActivity {
    protected Toolbar mToolbar;

    @Override
    protected final void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(getContentViewResId());
        setupToolbar();
        initWidgets();
        afterOnCreate();
    }

    /**
     * 获取Activity的布局id
     * 
     * @return
     */
    protected abstract int getContentViewResId();

    /**
     * 初始化toolbar
     */
    protected void setupToolbar() {
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        mToolbar.setTitle(R.string.app_name);
        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        mToolbar.setNavigationOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }

    protected void initWidgets() {
    }
    
    protected void afterOnCreate() {
    }
}

Toolbar

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:minHeight="?attr/actionBarSize"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
    app:theme="@style/toolbar.style">

</android.support.v7.widget.Toolbar>