Android Toolbar: Small Title Text in Landscape Mode

Android Toolbar: small title text in landscape mode

I tried to set android:titleTextAppearance of the toolbar but the style wasn't being applied. Then I realized I'm using the AppCompat theme so I used app:titleTextAppearance and the style is now being applied. It looks like the small letters in landscape are a problem in the built-in AppCompat.Toolbar.Title style itself so I overrode it to set the font size manually. The final code:

Toolbar XML:

<android.support.v7.widget.Toolbar
        android:id="@+id/main_toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:titleTextAppearance="@style/ToolbarTitle"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

Toolbar Style:

<style name="ToolbarTitle" parent="@style/TextAppearance.Widget.AppCompat.Toolbar.Title">
        <item name="android:textSize">20sp</item>
</style>

Why title size not changed after rotation?

The style of the title is in a configuration-specific XML file. If you don't recreate the view on configuration change, it will just stay as it is.

Solution: recreate the Activity on configuration change, or use a Fragment with setRetainInstance(true) which will be preserved while its view is re-created.

How to change the toolbar text size?

Use app:titleTextAppearance:

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="?actionBarSize"
    android:id="@+id/toolbar"
    app:titleTextAppearance="@style/Toolbar.TitleText" />

and override the default title size in a custom style:

<style name="Toolbar.TitleText" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
    <item name="android:textSize">18sp</item>
</style>

Result:

Toolbar title disappearing when changing orientation in collapsed state

You can check the state of AppBarLayout on configuration change(orientation), store it. Then you can set that state for the AppBarLayout after configuration change applied.

public class CheeseDetailActivity extends AppCompatActivity {

public static final String EXTRA_NAME = "cheese_name";
AppBarLayout appBarLayout;
boolean isCollapsed = false;

//state change listener
AppBarLayout.OnOffsetChangedListener toolbarStateListener = new AppBarLayout.OnOffsetChangedListener() {
    @Override
    public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
        if (verticalOffset == 0) {
            // Collapsed
            isCollapsed = true;
        } else {
            // Not collapsed
            isCollapsed = false;

        }
    }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_detail);

    Intent intent = getIntent();
    final String cheeseName = intent.getStringExtra(EXTRA_NAME);

    final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    CollapsingToolbarLayout collapsingToolbar =
            (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar);
    collapsingToolbar.setTitle(cheeseName);

    //getting app bar layout
    appBarLayout = (AppBarLayout) findViewById(R.id.appbar);
    //set listener to listen state change of app bar layout
    appBarLayout.addOnOffsetChangedListener(toolbarStateListener);

    loadBackdrop();
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    super.onSaveInstanceState(savedInstanceState);
    //save state on orientation change
    savedInstanceState.putBoolean("isCollapsed", isCollapsed);
}

@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    //get state on orientation change
    isCollapsed = savedInstanceState.getBoolean("isCollapsed");
}

@Override
protected void onResume() {
    super.onResume();
    //set state of app bar layout
    appBarLayout.setExpanded(isCollapsed);
}

private void loadBackdrop() {
    final ImageView imageView = (ImageView) findViewById(R.id.backdrop);
    Glide.with(this).load(Cheeses.getRandomCheeseDrawable()).centerCrop().into(imageView);
}

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

I have edited CheeseDetailActivity in CheeseSquare repository.

Support Action Bar not applying my style?

You need to use

<item name="background">@drawable/ab_solid</item>
<item name="titleTextStyle">@style/my_title_style</item>

for support library compatibility into your style.

Read Styling the Action Bar, section "For Android 2.1 and higher". Where it is given that you need to use two entries like

<style name="CustomActionBarTheme"
           parent="@style/Theme.AppCompat.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/MyActionBar</item>

        <!-- Support library compatibility -->
        <item name="actionBarStyle">@style/MyActionBar</item>
    </style>

---

So your complete style would be

<style name="Widget.MyTheme.ActionBar" parent="@style/Widget.AppCompat.ActionBar.Solid">
    <item name="android:background">@drawable/ab_solid</item>
    <item name="android:titleTextStyle">@style/my_title_style</item>
    <item name="background">@drawable/ab_solid</item>
    <item name="titleTextStyle">@style/my_title_style</item>
</style>

What is the recommended material design toolbar height in landscape

The Toolbar is a generic component that can be added to any part of your UI - when used as the primary action bar for branding, navigation, and actions, it is called an App Bar.

From the metrics on the App Bar, the correct heights are:

• Mobile Landscape: 48dp
• Mobile Portrait: 56dp
• Tablet/Desktop: 64dp

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