前面一篇已经简单地介绍了Toolbar及沉浸式状态栏的实现方式，这篇作为对前面的一些补充，希望能够帮助到你
文字介绍不多，主要内容在注释里写明了，仔细阅读代码应该能很好地理解。

使用Toolbar需要依赖appcompat-v7

• 使用Android Studio的童鞋请在app module的build.gradle中添加

dependencies {
    compile 'com.android.support:appcompat-v7:24.1.1'
｝

版本号酌情选择即可

• 使用Eclipse的童鞋请先添加appcompat-v7作为你的项目的library，不清楚的请百度、Google。

隐藏Actionbar

为了方便去除Actionbar，这里采用自定义theme
继承自"Theme.AppCompat.Light.NoActionBar"的方式，以下罗列了需要用到的style。

styles.xml

 <!--Custom base application theme-->
    <style name="CAppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!--Toolbar 导航按钮(返回按钮)样式-->
        <item name="toolbarNavigationButtonStyle">@style/mToolbarNavigationButtonStyle</item>
    </style>

    <!--Toolbar Navigation Button Sytle-->
    <style name="mToolbarNavigationButtonStyle" parent="@style/Widget.AppCompat.Toolbar.Button.Navigation">
        <item name="android:minWidth">40dp</item>
        <item name="android:padding">0dp</item>
        <item name="android:scaleType">centerInside</item>
    </style>

    <!--Custom Toolbar Style -->
    <style name="mToolbarStyle" parent="@style/Widget.AppCompat.Toolbar">
        <!-- 设置该属性解决Toolbar左边空白 默认为16dp-->
        <item name="contentInsetStart">0dp</item>
        <item name="contentInsetStartWithNavigation">0dp</item>
        <item name="titleMargin">0dp</item>
        <!--Toolbar Button min Height.Suggest use 0dp,
            also can use your Toolbar's Height-->
        <item name="android:minHeight">0dp</item>
        <!--Toolbar Button Max height.
            Suggest use size <= your custom Toolbar's Height-->
        <item name="maxButtonHeight">100dp</item>
    </style>

    <!--Custom Toolbar Theme -->
    <style name="mToolbarTheme" parent="@style/ThemeOverlay.AppCompat.ActionBar">
        <!-- Toolbar 标题文字颜色 包括navigation search等icon颜色-->
        <item name="android:textColorPrimary">@android:color/white</item>
        <item name="android:padding">0dp</item>
    </style>

    <!-- Toolbar 弹出菜单样式 -->
    <style name="mToolbarPopupTheme" parent="@style/ThemeOverlay.AppCompat.Light">
        <!-- 菜单背景色 -->
        <item name="android:colorBackground">@android:color/black</item>
        <!-- 菜单文字色 -->
        <item name="android:textColor">@android:color/holo_blue_dark</item>
        <!-- 菜单字体 -->
        <item name="android:textSize">20sp</item>
    </style>

    <!-- Toolbar 标题样式 -->
    <style name="mToolbarTitle" parent="@style/TextAppearance.Widget.AppCompat.Toolbar.Title">
        <item name="android:textSize">14sp</item>
    </style>

在AndroidManifest.xml中修改application theme

<application
        android:name=".MyApplication"
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/CAppTheme">

Toolbar布局

include_layout_toolbar.xml

<?xml version="1.0" encoding="utf-8"?>
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/toolbar"
    style="@style/mToolbarStyle"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:background="@android:color/holo_blue_bright"
    app:popupTheme="@style/mToolbarPopupTheme"
    app:theme="@style/mToolbarTheme"
    app:titleTextAppearance="@style/mToolbarTitle">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <View
            android:id="@id/toolbar_left_view"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_alignParentLeft="true"/>


        <ImageView
            android:id="@id/toolbar_left_img"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:layout_toRightOf="@id/toolbar_left_view"
            android:scaleType="centerInside"
            android:src="@drawable/ic_action_settings"
            android:visibility="gone"/>

        <TextView
            android:id="@id/toolbar_left_tv"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:layout_toRightOf="@id/toolbar_left_img"
            android:gravity="center"
            android:text="left_tv"
            android:visibility="gone"/>

        <TextView
            android:id="@id/toolbar_center_tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:text="@string/app_name"
            android:textSize="16sp"
            android:visibility="gone"/>

        <ImageView
            android:id="@id/toolbar_center_img"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:maxWidth="100dp"
            android:visibility="gone"/>

        <TextView
            android:id="@id/toolbar_right_tv"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:layout_toLeftOf="@id/toolbar_right_img"
            android:gravity="center"
            android:text="right"
            android:visibility="gone"/>

        <ImageView
            android:id="@id/toolbar_right_img"
            android:layout_width="50dp"
            android:layout_height="match_parent"
            android:layout_toLeftOf="@id/toolbar_right_view"
            android:scaleType="centerInside"
            android:src="@drawable/ic_action_settings"
            android:visibility="gone"/>

        <View
            android:id="@id/toolbar_right_view"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_alignParentRight="true"/>

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

BaseActivity布局

activity_base.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <include layout="@layout/include_layout_toolbar" />

</LinearLayout>

BaseActivity

public class BaseActivity extends AppCompatActivity {
    private static final String TAG = "BaseActivity";
    /**
     * Root view
     */
    private LinearLayout mRootLayout;
    /**
     * Toolbar instance
     */
    protected Toolbar mToolbar;

    public Toolbar getToolbar() {
        return mToolbar;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        super.setContentView(R.layout.activity_base);
        if (!isTaskRoot()) {
        /* If this is not the root activity,finish it.*/
            Intent intent = getIntent();
            String action = intent.getAction();
            if (intent.hasCategory(Intent.CATEGORY_LAUNCHER) && Intent.ACTION_MAIN.equals(action)) {
                //Logger.w("Activity is not the root.  Finishing Activity instead of launching.");
                Log.w(TAG, "Activity is not the root.  Finishing Activity instead of launching.");
                finish();
                return;
            }
        }
    }

    @Override
    public void setContentView(int layoutId) {
        setContentView(View.inflate(this, layoutId, null));
    }

    @Override
    public void setContentView(View view) {
        mRootLayout = (LinearLayout) findViewById(R.id.root_layout);
        if (mRootLayout == null) {
            return;
        }
        mRootLayout.addView(view,
                new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
        initToolbar();
    }

    /**
     * 初始化Toolbar
     */
    private void initToolbar() {
        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        if (mToolbar != null) {
            showToolbar(true);
            //mToolbar.inflateMenu(R.menu.main);
            /** 设置支持ActionBar，也可以不使用ActionBar */
            //setSupportActionBar(mToolbar);
            /** 去除ActionBar默认Title显示,可以不使用ActionBar */
            // getSupportActionBar().setDisplayShowTitleEnabled(false);
            //getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            //mToolbar.setNavigationOnClickListener(null);

        }
    }

    /**
     * 显示Toolbar
     *
     * @param show true:显示,false:隐藏
     */
    public void showToolbar(boolean show) {
        if (mToolbar == null) {
            Log.e(TAG, "Toolbar is null.");
        } else {
            int paddingTop = mToolbar.getPaddingTop();
            int paddingBottom = mToolbar.getPaddingBottom();
            int paddingLeft = mToolbar.getPaddingLeft();
            int paddingRight = mToolbar.getPaddingRight();
            int statusHeight = ScreenUtil.getStatusHeight(this);
            ViewGroup.LayoutParams params = mToolbar.getLayoutParams();
            int height = params.height;
            /**
             * 利用状态栏的高度，4.4及以上版本给Toolbar设置一个paddingTop值为status_bar的高度，
             * Toolbar延伸到status_bar顶部
             **/
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                setTranslucentStatus(show);
                if (show) {
                    paddingTop += statusHeight;
                    height += statusHeight;
                } else {
                    paddingTop -= statusHeight;
                    height -= statusHeight;
                }
            }
            params.height = height;
            mToolbar.setPadding(paddingLeft, paddingTop, paddingRight, paddingBottom);
            mToolbar.setVisibility(show ? View.VISIBLE : View.GONE);
        }
    }

    /**
     * 设置透明状态栏
     * 对4.4及以上版本有效
     *
     * @param on
     */
    @TargetApi(Build.VERSION_CODES.KITKAT)
    private void setTranslucentStatus(boolean on) {
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        final int bits = WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
        if (on) {
            winParams.flags |= bits;
        } else {
            winParams.flags &= ~bits;
        }
        win.setAttributes(winParams);
    }
}

获取状态栏高度

   /**
     * 获得状态栏的高度
     *
     * @param context
     * @return px
     */
    public static int getStatusHeight(Context context) {

        int statusHeight = -1;
        try {
            Class<?> clazz = Class.forName("com.android.internal.R$dimen");
            Object object = clazz.newInstance();
            int height = Integer.parseInt(clazz.getField("status_bar_height").get(object).toString());
            statusHeight = context.getResources().getDimensionPixelSize(height);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return statusHeight;
    }

overflowmenu

要使用overflowmenu，需要在res->menu中定义items,我们新建一个main.xml，内容如下：

<menu 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"
    tools:context="com.elonlink.toolbardemo.MainActivity" >

    <item
        android:id="@+id/ab_search"
        android:orderInCategory="10"
        android:title="action_search"
        app:actionViewClass="android.support.v7.widget.SearchView"
        app:showAsAction="ifRoom"/>
    <item
        android:id="@+id/action_settings"
        android:orderInCategory="100"
        app:showAsAction="never"
        android:title="@string/action_settings"/>
    <item
        android:id="@+id/action_settings1"
        android:orderInCategory="100"
        app:showAsAction="never"
        android:title="@string/action_settings"/>
</menu>

MainActivity布局

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.elonlink.toolbardemo.MainActivity">

</RelativeLayout>

MainActivity

public class MainActivity extends BaseActivity implements OnClickListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /** 设置支持ActionBar，这样就能正常显示overflowmenu了,否则设置了menu也无法在Toolbar中显示和使用 */
        setSupportActionBar(mToolbar);
        /** 去除ActionBar默认Title显示*/
        getSupportActionBar().setDisplayShowTitleEnabled(false);
    }

 @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_settings:
                Toast.makeText(MainActivity.this,"action_settings!",Toast.LENGTH_SHORT);
                break;
            default:
                break;
        }
        return super.onOptionsItemSelected(item);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            default:
                break;
        }
    }
}