How to get a label in the Android action bar

问题:

As the title suggests, I want to put some text in the action bar. Firstly, here's a mockup (in Paint!) of what I'm imagining:

I'm really struggling with this. In my activity I put:

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

And in the menu folder I put main_screen.xml:

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

  <item android:id="@+id/user_level"
    android:title="Administrator"
    android:showAsAction="withText" />

</menu>

So I have 2 questions:

Question 1

Why at the very least the solution above doesn't show the text Administrator

Question 2

Once it's showing the text, how do I make it appear like a label (with the grey background and the rounded corners, etc)?

Thank you for your help.

回答1:

custom menu item is what you need for your second question.

first you need to make custom layout for your menu item.

cust_menu.xml

<TextView
    android:id="@+id/admin"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="5dp"
    android:text="Administrator"
    android:textColor="#fff"
    android:background="@drawable/my_shape";
    android:textStyle="bold" />

for making rounded grey square background you need to make custom shape file and set it to your TextView background.

my_shape.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <corners android:radius="3dp" />

    <solid android:color="#e3e3e3" />

</shape>

now your menu item will go like this.

main.xml

<item
    android:id="@+id/admin"
    android:actionLayout="@layout/cust_menu"
    app:showAsAction="always">
</item>

and in java class simply do this.

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

let me know if any doubts.

for more information visit this

EDIT :

you can access your TextView this way.

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getSupportMenuInflater();
    inflater.inflate(R.menu.main, menu);

    View view = menu.findItem(R.id.admin).getActionView();
    TextView textView = (TextView) view.findViewById(R.id.textID);

    // do your stuff

    return super.onCreateOptionsMenu(menu);
}

happy coding.

回答2:

You can try adding below code in your menu item:

android:showAsAction="always|withText"
android:orderInCategory="50"

50 is just a random number.

You can configure the ActionBar styles and properties by creating ActionBar theme styles.
Read more at: Custom ActionBar Styles

回答3:

Question 1

You have to use the app namespace.

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">

<item android:id="@+id/user_level"
  android:title="Administrator"
  app:showAsAction="withText" />
</menu>

Question 2

You cannot use menu to do that. What you can do is to use AppBarLayout.

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.v7.widget.Toolbar
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center_vertical|end"
                android:paddingEnd="15dp"
                android:paddingLeft="15dp"
                android:paddingRight="15dp"
                android:paddingStart="15dp"/>
        </android.support.v7.widget.Toolbar>
    </android.support.design.widget.AppBarLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <!--Your normal content-->
    </LinearLayout>
</android.support.design.widget.CoordinatorLayout>