问题
Trying to set the ActionBar title in middle instead of the default left aligned position. To do so, based on other answers this is what I've done:
Toolbar myToolbar = (Toolbar) findViewById(R.id.toolbarDownloads);
setSupportActionBar(myToolbar);
if(getSupportActionBar()!=null)
{
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.actionbar_layout);
}
actionbar_layout.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"
android:orientation="vertical" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Downloads"
android:layout_centerInParent="true"
android:textColor="#000000"
android:id="@+id/mytext"
android:textSize="18sp" />
</RelativeLayout>
However, this does not produce the intended result (ie this renders the text however still is left aligned), what's wrong with this approach and how to fix this?
回答1:
try this use custom Toolbar
<android.support.v7.widget.Toolbar
android:id="@+id/ar_toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:layout_scrollFlags="exitUntilCollapsed"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Center"
android:orientation="vertical">
<TextView
android:id="@+id/toolbar_title"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center" />
</LinearLayout>
</android.support.v7.widget.Toolbar>
now in java file
private Toolbar toolbar;
toolbar = (Toolbar) findViewById(R.id.ar_toolbar);
TextView mTitle = (TextView) toolbar.findViewById(R.id.toolbar_title);
mTitle.setText("Nilesh Rathod");
setSupportActionBar(toolbar);
回答2:
Simple approach use android:layout_gravity="center" on your TextView and hide default title using below code after that initialize your TextView and set value
Inside your activity:
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
toolbar_title = (TextView) findViewById(R.id.toolbar_title);
toolbar_title.setText("My Custom center title");
Custom toolbar XML Code:
<?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"
app:contentInsetEnd="0dp"
app:contentInsetLeft="0dp"
app:contentInsetRight="0dp"
app:contentInsetStart="0dp"
app:contentInsetStartWithNavigation="0dp">
<TextView
android:id="@+id/toolbar_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="Toolbar Title" />
</android.support.v7.widget.Toolbar>
回答3:
You need to use Toolbar in your xml file and you can use TextView inside Toolbar. You can add custom view into Toolbar. Once you done with xml file then you can define Toolbar into Activity class.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="58dp"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:titleTextColor="#ffffff">
<TextView
android:id="@+id/mytext"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Downloads"
android:textColor="#000000"
android:textSize="18sp" />
</android.support.v7.widget.Toolbar>
//Rest of your code
</LinearLayout>
In Activity class you can define as
Toolbar toolbar;
toolbar = (Toolbar) findViewById(R.id.ar_toolbar);
toolbar.setTitle("");
回答4:
You don't need a Toolbar for this. Just use a theme like Theme.AppCompat.Light.DarkActionBar with ActionBar in your activity and use the following code:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getSupportActionBar().setCustomView(R.layout.actionbar_layout);
}
//your code
}
回答5:
<?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="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@android:color/transparent"
android:minHeight="?attr/actionBarSize"
app:contentInsetStart="0dp">
<TextView
android:id="@+id/back_txt"
style="@android:style/TextAppearance.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:gravity="center"
android:text="Back" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Downloads"
android:layout_gravity="center|center_horizontal|center_vertical"
android:layout_marginTop="20dp"
android:layout_centerInParent="true"
android:textColor="#000000"
android:id="@+id/mytext"
android:textSize="18sp" />
<TextView
android:id="@+id/filter_btn"
style="@style/Base.TextAppearance.AppCompat.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|center_vertical|center_horizontal"
android:layout_margin="10dp"
android:drawablePadding="5dp"
android:gravity="center"
android:text="Back"
android:textColor="@android:color/black" />
</android.support.v7.widget.Toolbar>
</LinearLayout>
来源：https://stackoverflow.com/questions/46558006/how-to-set-the-actionbar-title-in-middle-instead-of-the-default-left-aligned-pos