How can I style the slider, for example change colors for its track and thumb etc using xml?
slider.xml:
<com.google.android.material.slider.Slider
android:id="#+id/settingsMission_changeShakeDif_slider"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:stepSize="20.0"
android:theme="#style/SliderTheme"
android:valueFrom="0.0"
android:valueTo="40.0"
app:labelBehavior="gone" />
themes.xml
<style name="SliderTheme" parent="Widget.MaterialComponents.Slider">
<!-- Add attributes here -->
<item name="trackColorActive">#238ae6</item>
<item name="trackColorInactive">#a7bada</item>
<item name="tickColor">#13161d</item>
<item name="thumbColor">#238ae6</item>
</style>
When I do it like this, the color of my slider did not change (it remained the default purple color)
And when I try to run the app and open the bottom sheet dialog that has the slider, the app crashes. I am getting this runtime error too:
Caused by: java.lang.IllegalArgumentException: The style on this component requires your app theme to be Theme.AppCompat (or a descendant).
Found this useful article that solved my problem:
https://github.com/material-components/material-components-android/issues/1145
changes made to code:
slider.xml
<com.google.android.material.slider.Slider
android:id="#+id/settingsMission_changeShakeDif_slider"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="20dp"
android:layout_marginEnd="20dp"
android:stepSize="20.0"
android:theme="#style/AppTheme"
android:valueFrom="0.0"
android:valueTo="40.0"
app:labelBehavior="gone"
app:thumbColor="#238ae6"
app:tickColor="#13161d"
app:trackColorActive="#238ae6"
app:trackColorInactive="#a7bada" />
themes.xml
<style name="AppTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
I'm doing some UI designing for class on an open source project. I'm trying to make the appbar and tabs of this tablayout transparent but no matter what I do they remain white. If it were transparent the background would be able to be seen but i get this white instead.
I have tried-
changing the xml values in the mainfragments xml to transparent
changing the colors.xml values to transparent (all of them because i wanted
to be sure)
changing and even removing the "light theme" and "dark theme" values in
styles.xml and removing the app theme line in the android manifest
android:theme="#style/AppTheme.FullScreen.Light"
Am I missing something else that i can try? I would be very thankful for any suggestions.
in style.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Theme.Transparent" parent="android:Theme">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">#android:color/transparent</item>
<item name="android:windowContentOverlay">#null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:backgroundDimEnabled">false</item>
</style>
</resources>
in color.xml
value #color/transparent is the color value #00000000
<activity android:name=".YourActivity" android:theme="#style/Theme.Transparent">
</activity>
set alpha value in layout XML or dynamically in view to make view transparent.
view.setAlpha(40);
oR add from xml - value between 0 to 1
android:alpha="0.4"
In android Studio res->values->colors.xml
Step 1 : For selecting color
Step 2 : Changing transparency(you can move left to right for adjusting transparency )
Step 3 : Give this color as views background
<RelativeLayout
android:id="#+id/top_bar"
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#color/color_name">
This may help you.
As we all know, many Android apps display a white screen very briefly before their first Activity comes into focus. This problem is observed in the following cases:
Android apps that extend the global Application class and
perform major initializations therein. The Application
object is always created before the first Activity (a fact that can
be observed in the debugger), so this makes sense. This is the cause of the delay in my case.
Android apps that display the default preview window before the splash screen.
Setting android:windowDisablePreview = "true" obviously does not work here. Nor can I set the parent theme of the splash screen to Theme.Holo.NoActionBar as described here, because [unfortunately] my splash screen makes use of an ActionBar.
Meanwhile, apps that do not extend the Application class do not show the white screen at startup.
The thing is, ideally the initializations performed in the Application object need to occur before the first Activity is shown. So my question is, how can I perform these initializations on app startup without using an Application object? Possibly using a Thread or Service, I suppose?
This is an interesting problem to think about. I can't bypass it the usual way (by setting the NoActionBar theme), as tragically my Splash screen actually has an ActionBar due to some unrelated reasons.
Note:
I have already referred to the following questions:
How To fix white screen on app Start
up?
Android splash screen is white in the
beginning?
White screen before
splashscreen
White background when Android app start up
Why there is a white screen appears for 1sec when starting to run the apps in Android?
References:
Patterns – Launch screens.
Branded launch screen: the new splash for Android.
Splash Screens the Right Way.
please add this line into your app theme
<item name="android:windowDisablePreview">true</item>
for more information : https://developer.android.com/topic/performance/vitals/launch-time#themed
The problem with white background is caused because of android's cold start while the app loads to memory, and it can be avoided with this:
public class OnboardingWithCenterAnimationActivity extends AppCompatActivity {
public static final int STARTUP_DELAY = 300;
public static final int ANIM_ITEM_DURATION = 1000;
public static final int ITEM_DELAY = 300;
private boolean animationStarted = false;
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
setTheme(R.style.AppTheme);
getWindow().getDecorView().setSystemUiVisibility(
View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_onboarding_center);
}
#Override
public void onWindowFocusChanged(boolean hasFocus) {
if (!hasFocus || animationStarted) {
return;
}
animate();
super.onWindowFocusChanged(hasFocus);
}
private void animate() {
ImageView logoImageView = (ImageView) findViewById(R.id.img_logo);
ViewGroup container = (ViewGroup) findViewById(R.id.container);
ViewCompat.animate(logoImageView)
.translationY(-250)
.setStartDelay(STARTUP_DELAY)
.setDuration(ANIM_ITEM_DURATION).setInterpolator(
new DecelerateInterpolator(1.2f)).start();
for (int i = 0; i < container.getChildCount(); i++) {
View v = container.getChildAt(i);
ViewPropertyAnimatorCompat viewAnimator;
if (!(v instanceof Button)) {
viewAnimator = ViewCompat.animate(v)
.translationY(50).alpha(1)
.setStartDelay((ITEM_DELAY * i) + 500)
.setDuration(1000);
} else {
viewAnimator = ViewCompat.animate(v)
.scaleY(1).scaleX(1)
.setStartDelay((ITEM_DELAY * i) + 500)
.setDuration(500);
}
viewAnimator.setInterpolator(new DecelerateInterpolator()).start();
}
}
}
layout
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?colorPrimary"
android:orientation="vertical"
>
<LinearLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:orientation="vertical"
android:paddingTop="144dp"
tools:ignore="HardcodedText"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="16dp"
android:alpha="0"
android:text="Hello world" android:textAppearance="#style/TextAppearance.AppCompat.Widget.ActionBar.Title.Inverse"
android:textColor="#android:color/white"
android:textSize="22sp"
tools:alpha="1"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="8dp"
android:alpha="0"
android:gravity="center"
android:text="This a nice text"
android:textAppearance="#style/TextAppearance.AppCompat.Widget.ActionBar.Subtitle.Inverse"
android:textSize="20sp"
tools:alpha="1"
/>
<Button
android:id="#+id/btn_choice1"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginTop="48dp"
android:scaleX="0"
android:scaleY="0"
android:text="A nice choice"
android:theme="#style/Button"
/>
<Button
android:id="#+id/btn_choice2"
android:layout_width="200dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:scaleX="0"
android:scaleY="0"
android:text="Far better!"
android:theme="#style/Button"
/>
</LinearLayout>
<ImageView
android:id="#+id/img_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:src="#drawable/img_face"
tools:visibility="gone"
/>
</FrameLayout>
img face
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
android:opacity="opaque">
<item android:drawable="?colorPrimary"/>
<item>
<bitmap
android:gravity="center"
android:src="#drawable/img_face"/>
</item>
Add this theme to your splashscreen in the manifest
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
<item name="android:windowBackground">#null</item>
</style>
<style name="AppTheme.CenterAnimation">
<item name="android:windowBackground">#drawable/ll_face_logo</item>
</style>
which will produce efect like this
for more details and more solutions you can check this
BlogPost
Recommended way of solving this problem is missing in the answers. So I am adding my answer here. The white-screen-at-startup problem occurs because of the initial blank screen that the system process draws when launching the app. A common way to solve this is by turning off this initial screen by adding this to your styles.xml file.
<item name="android:windowDisablePreview">true</item>
But according to android documentation this can result in longer startup time. Recommended way of avoiding this initial white screen according to google is to use activity's windowBackground theme attribute and provide a simple custom drawable for the starting activity.
Like this:
Drawable Layout file, my_drawable.xml
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
<!-- The background color, preferably the same as your normal theme -->
<item android:drawable="#android:color/white"/>
<!-- Your product logo - 144dp color version of your app icon -->
<item>
<bitmap
android:src="#drawable/product_logo_144dp"
android:gravity="center"/>
</item>
</layer-list>
Create a new style in your styles.xml
<!-- Base application theme. -->
<style name="AppTheme">
<!-- Customize your theme here. -->
</style>
<!-- Starting activity theme -->
<style name="AppTheme.Launcher">
<item name="android:windowBackground">#drawable/my_drawable</item>
</style>
Add this theme to your starting activity in the Manifest file
<activity ...
android:theme="#style/AppTheme.Launcher" />
And when you want to transition back to your normal theme call setTheme(R.style.Apptheme) before calling super.onCreate() and setContentView()
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// Make sure this is before calling super.onCreate
setTheme(R.style.Theme_MyApp);
super.onCreate(savedInstanceState);
// ...
}
}
This is the recommended way to solve the problem and this is from google Material Design patterns.
Please copy and paste these two lines in your manifest app theme i.e res/styles/AppTheme. then it will work like charm..
<item name="android:windowDisablePreview">true</item>
<item name="android:windowIsTranslucent">true</item>
First of all, to remove the white screen read this - https://www.bignerdranch.com/blog/splash-screens-the-right-way/
But more importantly, optimize your initial load and defer any heavy work to when you have time to run it. Post your application class here if you want us to take a look at it.
Have you tried setting theandroid:windowBackground attribute in the theme of your launcher activity, to either a color or a drawable?
For example this:
<item name="android:windowBackground">#android:color/black</item>
when added to the Launcher activity theme will show a black color (rather than the white color) on startup. This is an easy trick to hide long initialisation, while showing your users something, and it works fine even if you subclass the Application object.
Avoid using other constructs (even Threads) for doing long initialisation tasks, because you may end up not being able to control the lifecycle of such constructs. The Application object is the correct place for doing exactly this type of actions.
I added the following two lines in my theme
under styles.xml
<item name="android:windowDisablePreview">true</item>
<item name="android:windowBackground">#null</item>
Worked like a charm
I had same issue, you have to update your style.
style.xml
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- Customize your theme here. -->
<item name="drawerArrowStyle">#style/DrawerArrowStyle</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowDisablePreview">true</item>
<item name="android:windowBackground">#null</item>
<item name="android:windowIsTranslucent">true</item>
</style>
Your manifest file should looks like below.
<application
android:name=".MyApplication"
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
// Other stuff
</application>
Outout:
Hope this would help you.
Within the lifecycle callback methods, you can declare how your activity behaves when the user leaves and re-enters the activity. Remember that the way Android is designed, there is a lifecycle for each and every app. If you put too much load to the onCreate() method (which is the method used to load the layout files and initalise any controls you have in it), then the white screen will become more visible, as the layout file will take longer to load.
I suggest using several different methods when starting an activity. Such are the onStart() (being called as the first thing once the app is loaded), onActivityCreated() (being called after the layout is displayed and useful if you are making any data processing upon starting the activity).
To make it easier for you, below is the official activity lifecycle diagram (from http://web.archive.org/web/20140218132043/http://developer.android.com/training/basics/activity-lifecycle/starting.html):
Please try this once.
Create a drawable file splash_background.xml
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="#color/{your color}" />
<item>
<bitmap
android:layout_width="#dimen/size_250"
android:layout_height="#dimen/size_100"
android:gravity="center"
android:scaleType="fitXY"
android:src="{your image}"
android:tint="#color/colorPrimary" />
</item>
</layer-list>
Put this in styles.xml
<style name="SplashTheme" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowBackground">#drawable/splash_background</item>
</style>
In your AndroidMainfest.xml set the above theme to Launch activity.
<activity
android:name=".SplashScreenActivity"
android:screenOrientation="portrait"
android:theme="#style/SplashTheme"
android:windowSoftInputMode="stateVisible|adjustResize">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
According to Google's recommendation Here, you should not prevent this white screen from launching. You can use this theme attribute to turn off the initial blank screen that the system process draws when launching the app.
<item name="android:windowDisablePreview">true</item>
However, This approach is not recommended because it can result in a longer startup time than apps that don’t suppress the preview window. Also, it forces the user to wait with no feedback while the activity launches, making them wonder if the app is functioning properly.
They recommend to use the activity's windowBackground theme attribute to provide a simple custom drawable for the starting activity instead of disabling the preview window.
Therefore, here is the recommended solution:
First, create a new drawable file for example startup_screen.xml
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" android:opacity="opaque">
<!-- The background color, preferably the same as normal theme -->
<item android:drawable="#android:color/white"/>
<!-- Product logo - 144dp color version of App icon -->
<item>
<bitmap
android:src="#drawable/logo"
android:gravity="center"/>
</item>
</layer-list>
Second, reference it from your style file. If you use Night mode. Add it in both themes.xml files.
<!-- Start Up Screen -->
<style name="AppThemeLauncher" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<item name="android:statusBarColor" tools:targetApi="l">#color/lightGray</item>
<item name="android:windowBackground">#drawable/startup_screen</item>
</style>
If you notice, I added statusBarColor attribute to change the color of status Bar according to my custom design.
Then, Add AppThemeLauncher Theme in your current activity.
<activity
android:name=".MainActivity"
android:theme="#style/AppThemeLauncher"/>
If you want to transition back to your normal theme, call setTheme(R.style.AppTheme) before calling super.onCreate() and setContentView():
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
// Make sure this is before calling super.onCreate
setTheme(R.style.AppTheme)
super.onCreate(savedInstanceState)
// ...
}
}
Did you try to put initialization to onActivityCreated?
Inside Application class :
registerActivityLifecycleCallbacks(new ActivityLifecycleCallbacks() {
#Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
if(activity.getClass().equals(FirstActivity.class) {
// try without runOnUiThread if it will not help
activity.runOnUiThread(new Runnable() {
#Override
public void run() {
new InitializatioTask().execute();
}
});
}
}
#Override
public void onActivityStarted(Activity activity) {
}
#Override
public void onActivityResumed(Activity activity) {
}
#Override
public void onActivityPaused(Activity activity) {
}
#Override
public void onActivityStopped(Activity activity) {
}
#Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
}
#Override
public void onActivityDestroyed(Activity activity) {
}
});
As you are already aware why this white screen is there, as due to background processes or application initialization or large files, so just check below idea for overcome from this.
To prevent this white screen on beginning of the app, one way is splash screen, this is just a way not final and you must have to use.
When you will show splash screen from your splash.xml file, then also this issue will be remain same,
So you have to create ont style in style.xml file for splash screen and there you have to set window background as your splash image and then apply that theme to your splash activity from manifest file. So now when you will run app, first it will set theme and by this way user will be able to see directly splash image instead of white screen.
Both properties works
<style name="AppBaseThemeDark" parent="#style/Theme.AppCompat">
<!--your other properties -->
<!--<item name="android:windowDisablePreview">true</item>-->
<item name="android:windowBackground">#null</item>
<!--your other properties -->
</style>
Just write the item in values/styles.xml:
<item name="android:windowBackground">#android:color/black</item>
For example, in the AppTheme:
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<item name="windowNoTitle">true</item>
<item name="windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">#null</item>
<item name="android:windowBackground">#android:color/black</item>
<item name="colorPrimary">#color/colorPrimary</item>
<item name="colorPrimaryDark">#color/colorPrimaryDark</item>
<item name="colorAccent">#color/colorAccent</item>
</style>
Style :-
<style name="SplashViewTheme" parent="Theme.AppCompat.NoActionBar">
<item name="android:windowBackground">#drawable/splash</item>
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
In Manifest :-
<activity android:name=".SplashActivity"
android:theme="#style/SplashViewTheme">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
You should have colors.xml on values-night (create alongside values folder if it doesn't already exist) folder for dark theme colors.
eg.
<resources>
<color name="status_bar">#0e0e0e</color>
</resources>
(colors.xml on regular values folder will be used for light theme)
And on styles.xml which supplies your app theme you will have entry for background and statusbar which takes necessary values.
eg.
<style name="Theme.<AppName>" parent="Theme.AppCompat.Light.NoActionBar">
<item name="colorPrimary">#color/red700</item>
<item name="colorPrimaryDark">#color/red900</item>
<item name="colorAccent">#color/red700</item>
<item name="android:statusBarColor">#color/status_bar</item>
<item name="android:background">#color/status_bar</item>
</style>
This style is referenced on AndroidManifest.xml file
android:theme="#style/Theme.<AppName>">
Delete
<style name="AppTheme.Launcher">
<item name="android:windowBackground">#drawable/splashscreen</item>
</style>
from style.xml file
I'm trying to get a shadow to appear beneath my action bar, but for some reason the shadow continually appears and begins at the very top of the screen, instead of beneath the action bar. I'm using a CustomView android.support.v7.widget.Toolbar action bar widget in each of my xml layout files. How can I get the shadow to properly appear beneath this action bar instead of at the top? Can I set some kind of divider equal to the height of this custom view before the shadow appears? Can we do something like set the height of the gradient to 50dp but only show the gradient in the last 5-10% of that height?
My theme:
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<!-- colorPrimary is used for the default action bar background -->
<item name="colorPrimary">#color/white</item>
<!-- colorPrimaryDark is used for the status bar -->
<item name="colorPrimaryDark">#000</item>
<!-- colorAccent is used as the default value for colorControlActivated
which is used to tint widgets -->
<item name="colorAccent">#color/teal</item>
<!-- You can also set colorControlNormal, colorControlActivated
colorControlHighlight & colorSwitchThumbNormal. -->
<item name="android:textColorSecondary">#d7d7d7</item>
<item name="android:windowContentOverlay">#drawable/actionbar_shadow</item>
</style>
Shadow drawable:
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<size android:height="4dp" />
<gradient
android:angle="270"
android:endColor="#android:color/transparent"
android:startColor="#color/grey" />
</shape>
Toolbar:
<android.support.v7.widget.Toolbar
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/toolbar"
android:layout_height="50dp"
android:minHeight="30dp"
android:layout_width="match_parent"
android:paddingTop="10dp"
android:paddingBottom="10dp"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
android:background="#color/white">
<ImageView
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="#drawable/actionbar_title_r"
android:id="#+id/ActionBarTitle" />
</android.support.v7.widget.Toolbar>
Toolbar will have a shadow only in devices running on API 21 or higher. In order to achieve this effect you can add the property android:elevation="4dp" And it will work fine. Hope this helps
You can try several dp for elevation on the material appBar layout and see the degree of effect it gives. Then you decide how much do you give it.
in the appBar,
android:elevation = "1dp"
play with 2dp, 3dp,4dp and choose whats right for you.
I am trying to add a splash screen to my app to display while everything is loading. I followed this post to do this via a theme. It looks to be working the way I want, but shortly after the splash is displayed the app crashes when trying to customize the ActionBar.
theme.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Theme.SplashScreen" parent="#style/Theme.AppCompat">
<item name="android:windowBackground">#drawable/orange_background</item>
<item name="android:windowNoTitle">true</item>
</style>
</resources>
Relevant section of AndroidManifest.xml
<application
android:allowBackup="true"
android:theme="#style/CustomActionBarTheme"
android:label="#string/app_name"
android:icon="#drawable/ic_launcher"
android:largeHeap="true" >
<activity
android:name="com.example.app.MainActivity"
android:label="#string/app_name"
android:theme="#style/Theme.SplashScreen"
android:screenOrientation="portrait" >
Section in MainActivity.java causing crash
final ActionBar actionBar = getSupportActionBar();
actionBar.setDisplayHomeAsUpEnabled(true);
Caused by: java.lang.NullPointerException at android.support.v7.app.ActionBarImplICS.setDisplayHomeAsUpEnabled(ActionBarImplICS.java:174) at android.support.v7.app.ActionBarImplJB.setDisplayHomeAsUpEnabled(ActionBarImplJB.java:20)
NOTE: This crash only started happening after I implemented the splash screen.
I guess it's a conflict with windowNoTitle and setDisplayHomeAsUpEnable.
For the splash screen, you disable the Title(and the full ActionBar), and in MainActivity.java you try to set an up button in the disabled ActionBar.
You might want to use the code from this post.
why do you need to get action bar in splash screen?
once you define:
<item name="android:windowNoTitle">true</item>
getActionBar always returns null
Adding "android:windowNoTitle" means no action bar is created. Therefore getSupportActionBar() will return null.