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

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    tools:context=".MainActivity">

    <android.support.design.widget.AppBarLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar

            android:id="@+id/toolbar"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:background="?attr/colorPrimary"

            app:popupTheme="@style/AppTheme.PopupOverlay">

            <TextView

                android:layout_width="wrap_content"

                android:layout_height="wrap_content"

                android:layout_centerInParent="true"

                android:layout_gravity="center"

                android:text="设置"

                android:textSize="22sp" />

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

    </android.support.design.widget.AppBarLayout>

</android.support.design.widget.CoordinatorLayout>

<resources>

    <!-- Base application theme. -->

    <style name="AppTheme" parent="Base.Theme.AppCompat.Light">

        <!-- Customize your theme here. -->

        <item name="colorPrimary">@color/colorPrimary</item>

        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>

        <item name="colorAccent">@color/colorAccent</item>

    </style>

    <style name="AppTheme.NoActionBar">

        <item name="windowActionBar">false</item>

        <item name="windowNoTitle">true</item>

    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

</resources>
    

package action.sun.com.testtoobar1;

import android.os.Bundle;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.Snackbar;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.View;

import android.view.Menu;

import android.view.MenuItem;

import android.view.Window;

import android.view.WindowManager;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        /*getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

                WindowManager.LayoutParams.FLAG_FULLSCREEN);    //设置全屏*/

        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

        //一定要加，为了去掉本身的标题文字

        toolbar.setTitle("");

        //初始化toolbar

        setSupportActionBar(toolbar);

        //左边的小箭头（注意需要在setSupportActionBar(toolbar)之后才有效果）

        toolbar.setNavigationIcon(R.mipmap.back);

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        Toast.makeText(MainActivity.this, "选择了菜单", Toast.LENGTH_SHORT).show();

        //初始化右边的菜单选项

        //getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        Toast.makeText(MainActivity.this, "选择了后退按钮="+id, Toast.LENGTH_SHORT).show();

        //noinspection SimplifiableIfStatement

        return super.onOptionsItemSelected(item);

    }

}