自定义Toolbar

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.support.annotation.Nullable;
import android.support.annotation.StringRes;
import android.support.v7.widget.TintTypedArray;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;


/**
 * 自定义的导航栏
 */
public class CNToolbar extends Toolbar {

    private TextView toolbar_title;
    private EditText toolbar_searchview;
    private ImageView toolbar_leftButton;
    private ImageView toolbar_rightButton;
    private View mChildView;
    private boolean showSearchView;
    private Drawable left_button_icon;
    private Drawable right_button_icon;
    private String title;

    public CNToolbar(Context context) {
        this(context, null, 0);
    }

    public CNToolbar(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CNToolbar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);

        //通过代码得到布局文件当中一些属性的值
        final TintTypedArray a = TintTypedArray.obtainStyledAttributes(getContext(), attrs,
                R.styleable.CNToolbar, defStyleAttr, 0);
        showSearchView = a.getBoolean(R.styleable.CNToolbar_showSearchView, false);
        left_button_icon = a.getDrawable(R.styleable.CNToolbar_leftButtonIcon);
        right_button_icon = a.getDrawable(R.styleable.CNToolbar_rightButtonIcon);
        title = a.getString(R.styleable.CNToolbar_myTitle);
        a.recycle();

        //初始界面
        initView();
        //初始监听器
        initListener();
    }

    /**
     * 初始化布局
     */
    private void initView() {

        if (mChildView == null) {
            mChildView = View.inflate(getContext(), R.layout.mytoolbar, null);

            toolbar_title = (TextView) mChildView.findViewById(R.id.toolbar_title);
            toolbar_searchview = (EditText) mChildView.findViewById(R.id.toolbar_searchview);
            toolbar_leftButton = (ImageView) mChildView.findViewById(R.id.toolbar_leftButton);
            toolbar_rightButton = (ImageView) mChildView.findViewById(R.id.toolbar_rightButton);

            //添加自定义的布局到Toolbar
            addView(mChildView);

            //设置标题、搜索框、左右按钮是否显示，并且设置按钮的图标
            if (showSearchView) {
                showSearchview();
                hideTitle();
            } else {
                hideSearchview();
                showTitle();
                if (title != null) {
                    toolbar_title.setText(title);
                }
            }

            if (left_button_icon != null) {
                toolbar_leftButton.setImageDrawable(left_button_icon);
            }

            if (right_button_icon != null) {
                toolbar_rightButton.setImageDrawable(right_button_icon);
            }
        }

    }

    /**
     * 重写设置标题的方法
     *
     * @param title
     */
    @Override
    public void setTitle(CharSequence title) {
        toolbar_title.setText(title);
    }

    @Override
    public void setTitle(@StringRes int resId) {
        toolbar_title.setText(resId);
    }

    /**
     * 设置左右按钮的图标
     *
     * @param d
     */
    public void setLeftButtonIconDrawable(Drawable d) {
        toolbar_leftButton.setImageDrawable(d);
    }

    public void setRightButtonIconDrawable(Drawable d) {
        toolbar_rightButton.setImageDrawable(d);
    }

    /**
     * 标题与搜索框的切换
     */
    public void setShowSearchView() {
        hideTitle();
        showSearchview();
    }

    public void setShowTitleView(String title) {
        hideSearchview();
        showTitle();
        toolbar_title.setText(title);
    }

    /**
     * 左右按钮的监听
     */
    private void initListener() {
        toolbar_leftButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (onLeftButtonClickListener != null) {
                    onLeftButtonClickListener.onClick();
                }
            }
        });

        toolbar_rightButton.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if (onRightButtonClickListener != null) {
                    onRightButtonClickListener.onClick();
                }
            }
        });
    }

    public interface OnLeftButtonClickListener {
        void onClick();
    }

    public interface OnRightButtonClickListener {
        void onClick();

    }

    private OnLeftButtonClickListener onLeftButtonClickListener;
    private OnRightButtonClickListener onRightButtonClickListener;

    public void setOnLeftButtonClickListener(OnLeftButtonClickListener listener) {
        onLeftButtonClickListener = listener;
    }

    public void setOnRightButtonClickListener(OnRightButtonClickListener listener) {
        onRightButtonClickListener = listener;
    }
    /**
     * 设置标题或者搜索框是否显示
     */
    private void showTitle() {
        toolbar_title.setVisibility(View.VISIBLE);
    }

    private void hideTitle() {
        toolbar_title.setVisibility(View.GONE);
    }

    private void showSearchview() {
        toolbar_searchview.setVisibility(View.VISIBLE);
    }

    private void hideSearchview() {
        toolbar_searchview.setVisibility(View.GONE);
    }
}

 MainAcitivty简单使用

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        final CNToolbar toolbar = (CNToolbar) findViewById(R.id.toolbar);

        toolbar.setOnLeftButtonClickListener(new CNToolbar.OnLeftButtonClickListener() {
            @Override
            public void onClick() {

                finish();
            }
        });
        toolbar.setOnRightButtonClickListener(new CNToolbar.OnRightButtonClickListener() {
            @Override
            public void onClick() {
                toolbar.setShowSearchView();
            }
        });
    }
}

 activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.issuser.toolbardemo.MainActivity">

    <com.example.issuser.toolbardemo.CNToolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:minHeight="?actionBarSize"
        app:showSearchView="false"
        app:myTitle="首页"
        />
</RelativeLayout>

 mytoolbar.xml

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

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true">

        <ImageView
            android:id="@+id/toolbar_leftButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_centerVertical="true"
            android:src="@drawable/clear_dark"
            android:textColor="@color/white"
            android:visibility="visible"
            />

        <ImageView
            android:id="@+id/toolbar_rightButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:src="@drawable/search"
            android:textColor="@color/white"
            android:visibility="visible"
            />
        <!--style="@style/search_view"-->
        <EditText
            android:id="@+id/toolbar_searchview"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_gravity="center"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_toLeftOf="@id/toolbar_rightButton"
            android:layout_toRightOf="@id/toolbar_leftButton"
            android:drawableLeft="@drawable/search"
            android:gravity="center"
            android:hint="请输入搜索内容"
            android:visibility="gone"
            />

        <TextView
            android:id="@+id/toolbar_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerInParent="true"
            android:layout_gravity="center"
            android:layout_marginLeft="10dp"
            android:layout_marginRight="10dp"
            android:layout_toLeftOf="@id/toolbar_rightButton"
            android:layout_toRightOf="@id/toolbar_leftButton"
            android:gravity="center"
            android:textColor="@color/white"
            android:textSize="20sp"
            android:visibility="gone"
            />

    </RelativeLayout>

</RelativeLayout>

 Values下创建atts.xml

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

    <declare-styleable name="CNToolbar">
        <attr name="showSearchView" format="boolean"/>
        <attr name="leftButtonIcon" format="reference"/>
        <attr name="rightButtonIcon" format="reference"/>
        <attr name="myTitle" format="string"/>
    </declare-styleable>

</resources>

 style.xml

<resources>

    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="colorPrimary">@color/red</item>
        <item name="colorPrimaryDark">@color/green</item>
        <item name="colorAccent">@color/blue</item>
        <item name="android:textColorPrimary">@color/white</item>
        <item name="android:windowActionBar">false</item>
        <item name="android:windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

</resources>

 效果图：