Android centre title with navigation drawer

问题

I currently have a navigation drawer with a toolbar that has a title, i wish to centre this title within the toolbar but the toolbar does not seem to take into consideration the drawer icon as you can see in the following picture.

whereas when i use the same toolbar layout for other activities that are not inside the navigation drawer the title is centred perfectly, as show in this picture:

So how do i get it to take into account this icon?

Here is my layout:

<android.support.design.widget.AppBarLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:theme="@style/Theme.App.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/black"
        app:popupTheme="@style/Theme.App.PopupOverlay">

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

            <TextView
                android:id="@+id/toolbar_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:textColor="@color/white"
                android:textStyle="bold"
                android:text="Title"
                android:textSize="16sp" />

        </RelativeLayout>

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

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

回答1:

You need to understand that Toolbar widget extends ViewGroup class, and it has it's own LayoutParams.

So you do not require RelativeLayout inside Toolbar, and need to add just single line with TextView.

android:layout_gravity="center_horizontal"

And final xml should look like this,

<android.support.design.widget.AppBarLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/Theme.App.AppBarOverlay" >

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/black"
    app:popupTheme="@style/Theme.App.PopupOverlay" >

    <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="Title"
        android:textColor="@color/white"
        android:textSize="16sp"
        android:textStyle="bold" />
</android.support.v7.widget.Toolbar>

回答2:

Remove the RelativeLayout, then change your TextView like this:

<android.support.design.widget.AppBarLayout
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:theme="@style/Theme.App.AppBarOverlay">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/black"
        app:popupTheme="@style/Theme.App.PopupOverlay">

        <TextView
            android:id="@+id/toolbar_title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Title"
            android:textColor="@color/white"
            android:textSize="16sp"
            android:textStyle="bold"/>

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

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

After that call setDisplayShowTitleEnabled, to remove the original title, in the onCreate method of your activity:

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(false);

        ...
    }
}

This is the result obtained:

回答3:

You need to change android:layout_width="wrap_content" to android:layout_width="match_parent" in Textview.....

回答4:

Hope this will help. try to use this code into your xml , your code with few changes :

<TextView
        android:id="@+id/toolbar_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="title"
        android:gravity="center"
        android:textColor="#ffffff"
        android:textSize="21dp"
        android:textStyle="bold"
        android:paddingRight="30dp"
        android:paddingLeft="10dp"
        android:paddingTop="15dp" />

Use this for each activity. This will makes sure that your text would cover the entire space next to the icon and center the text within it.

<android.support.v7.widget.Toolbar android:id="@+id/toolbar"
    android:layout_width="match_parent" android:layout_height="?attr/actionBarSize"
    android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" />
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/imageView"
        android:paddingTop="15dp"
        android:src="@drawable/ic_keyboard_arrow_left_black_24dp"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/toolbar_title"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="title"
        android:gravity="center"
        android:textColor="#ffffff"
        android:textSize="21dp"
        android:textStyle="bold"
        android:paddingRight="30dp"
        android:paddingLeft="10dp"
        android:paddingTop="15dp" />

</RelativeLayout>

--------Nav_Drawer layout 

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent" android:layout_height="@dimen/nav_header_height"
        android:background="@drawable/side_nav_bar"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        android:theme="@style/ThemeOverlay.AppCompat.Dark" android:orientation="vertical"
        android:gravity="bottom">

        <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:paddingTop="@dimen/nav_header_vertical_spacing"
            android:src="@android:drawable/sym_def_app_icon" android:id="@+id/imageView" />

        <TextView android:layout_width="match_parent" android:layout_height="wrap_content"
            android:paddingTop="@dimen/nav_header_vertical_spacing" android:text="Android Studio"
            android:textAppearance="@style/TextAppearance.AppCompat.Body1" />

        <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:text="android.studio@android.com" android:id="@+id/textView" />

    </LinearLayout>

来源：https://stackoverflow.com/questions/33664466/android-centre-title-with-navigation-drawer

标签

android

android-toolbar

navigation-drawer