Android FragmentActivity, AppBarLayout, Toolbar and translucent status bar

Question

I'm trying to have a single Toolbar (v7) that shows under the statusbar of Android in version 21+ while using the v4 compability library. I read a lot of posts and tried a lot of different configurations, but can't seem to get it working without setting the padding manually (which is something I want to prevent because the size of the SystemWindow might change on later Android versions) or using setSupportActionBar().

I started with the default Scrolling example in Android Studio and tried to replace the CollapsingToolbarLayout by a regular Toolbar.

My layout:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.wbusey0.toolbartest.ScrollingActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:fitsSystemWindows="true"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:popupTheme="@style/AppTheme.AppBarOverlay" />
    </android.support.design.widget.AppBarLayout>

    <include layout="@layout/content_scrolling" />

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

styles.xml:

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" />

    <style name="AppTheme.PopupOverlay"  />

</resources>

v21 styles xml:

    <style name="AppTheme.NoActionBar" parent="@style/Theme.AppCompat.Light">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
        <item name="android:statusBarColor">@android:color/transparent</item>
        <item name="android:windowTranslucentStatus">true</item>
    </style>

My manifest:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.wbusey0.toolbartest">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".ScrollingActivity"
            android:label="@string/app_name"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

I cannot use setSupportActionBar() because I want to use nested fragments later and thus like to extend FragmentActivity. However using setSupportActionBar() solves my problem. Any ideas on how to fix the toolbar height?

Answer 1

You should use AppCompatActivity, not FragmentActivity.

public ScrollingActivity extends AppCompatActivity {

NOT

public ScrollingActivity extends FragmentActivity {

Answer 2

To fix this problem, You may want to change android:layout_height of AppBarLayout to wrap_content.

So:

<android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        android:theme="@style/AppTheme.AppBarOverlay">

As well as the documentation says the same thing :

https://developer.android.com/reference/android/support/design/widget/AppBarLayout.html

UPDATE:

Honestly, I did not think about FragmentActivity. Anyways, Here is your answer:

https://stackoverflow.com/a/30371919/4409113

With the latest version of the support library you should make your Activity extend AppCompatActivity as ActionBarActivity has been deprecated.

But in your situation, This can help:

((AppCompatActivity) getActivity()).setSupportActionBar(toolbar)

And if this didn't work, Then ;

As @Divers said, You'll need to extend the 'Activity' to 'AppCompatActivity'..And just initializing the 'Toolbar'.