我必须为Android应用程序中的每个活动创建一个工具栏吗?

问题描述:

我对Android中的新工具栏有疑问.

I have this doubt about new Toolbar in Android.

我必须为我的应用程序中的每个活动创建一个工具栏,或者有最佳实践为所有活动创建一个工具栏?

I have to create one Toolbar for each activity in my app or there are a best practice to create one Toolbar for all activities?

我尝试创建一个对布局进行填充的Singleton,并搜索一个视图ID以创建一个工具栏,并为所有活动返回相同的实例,但这是行不通的.

I try create a Singleton inflating a layout and search a view ID to create a toolbar and return the same instance for all activities, but this don't work.

有人可以帮助我吗?:S

Can anybody help me? :S

工具栏只是一个视图,您必须将其添加到所需的每个 Activity 中显示它.

Toolbar is just a view and you have to add it to your each Activity in which you want to show it.

一种方法是将其放在单独的布局文件中,然后将其包含在您的 Activity 布局中.

One way is to just put it in a separate layout file and include in your Activity layout.

toolbar.xml

toolbar.xml

<?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"
    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    >

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

现在在活动"布局中要添加的位置只需添加如下内容:

Now in your Activity layout where you want to add it just include like this:

<include
        android:id="@+id/toolbar"
        layout="@layout/toolbar"/>