I've been trying to figure this one out for a while. I have an app that uses the action bar but every time I want to call it in comes up null. Giving this error
12-01 10:54:11.499: E/AndroidRuntime(2385): FATAL EXCEPTION: main
12-01 10:54:11.499: E/AndroidRuntime(2385): Process: com.example.jobpool, PID: 2385
12-01 10:54:11.499: E/AndroidRuntime(2385): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jobpool/com.example.jobpool.Signup}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.hide()' on a null object reference
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread.access$800(ActivityThread.java:144)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.os.Handler.dispatchMessage(Handler.java:102)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.os.Looper.loop(Looper.java:135)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread.main(ActivityThread.java:5221)
12-01 10:54:11.499: E/AndroidRuntime(2385): at java.lang.reflect.Method.invoke(Native Method)
12-01 10:54:11.499: E/AndroidRuntime(2385): at java.lang.reflect.Method.invoke(Method.java:372)
12-01 10:54:11.499: E/AndroidRuntime(2385): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
12-01 10:54:11.499: E/AndroidRuntime(2385): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
12-01 10:54:11.499: E/AndroidRuntime(2385): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.hide()' on a null object reference
12-01 10:54:11.499: E/AndroidRuntime(2385): at com.example.jobpool.Signup.onCreate(Signup.java:16)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.Activity.performCreate(Activity.java:5933)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
12-01 10:54:11.499: E/AndroidRuntime(2385): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
12-01 10:54:11.499: E/AndroidRuntime(2385): ... 10 more
I know this has been discussed in other threads but I haven't found a solution that works for me. I have the app.support.v7 library added.
Here's the onCreate method:
public class Signup extends Activity
{
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.signup);
getActionBar().hide();
SetListeners();
}
....
Here's the manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.jobpool"
android:versionCode="1"
android:versionName="1.0" >
android:Debuggable = "True"
android:VMsafemode ="True"
android:AllowBackup = "True"
android:AllowClearuserdate= "True"
android:HardwareAccelerated = "True"
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="#drawable/logo_icon_large"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".Signup"
android:label="signup" >
</activity>
<activity
android:name=".Dashboard"
android:label="dashboard" >
</activity>
<activity
android:name=".UserRegistration"
android:label="#string/title_activity_user_registration" >
</activity>
</application>
</manifest>
and lastly my values/styles file
<resources>
<!--
Base application theme, dependent on API level. This theme is replaced
by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
-->
<style name="AppBaseTheme" parent="#style/Theme.AppCompat.Light.DarkActionBar">
<!--
Theme customizations available in newer API levels can go in
res/values-vXX/styles.xml, while customizations related to
backward-compatibility can go here.
-->
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
<item name="android:windowNoTitle">true</item> <!-- Hides the Action Bar -->
<item name="android:windowFullscreen">true</item> <!-- Hides the status bar -->
</style>
</resources>
if you are using the support library then you have to use getSupportActionBar() instead of getActionBar(), and instead of extends Activity you have to extends ActionBarActivity. Here you can find the documentation
you declare your AppTheme with the actionbar hidden:
WIth these flags, it will never be there
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
<!-- All customizations that are NOT specific to a particular API-level can go here. -->
<item name="android:windowNoTitle">true</item> <!-- Hides the Action Bar -->
<item name="android:windowFullscreen">true</item> <!-- Hides the status bar -->
</style>
Your getActionBar method is not returning anything i suppose, it is null, so it is unable to call the hide method.
By the way, how are you supposed to get ActionBar reference directly using getActionBar when you haven't even extended your Activity from ActionBarActivity???
if you are using support library put the code in this way
public class Signup extends Activity
{
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.signup);
getSupportActionBar().hide();
SetListeners();
}
....
Related
I am adding a Toolbar in an Activity in my Library project. In my library AndroidManifest, I am using this theme -
<style name="NoobAppTheme" 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="toolbarStyle">#style/Widget.AppCompat.Toolbar</item>
</style>
But since it was giving some problem in manifest merger due to conflict in AppTheme, I added the changed the AndroidManifest of my app module to this -
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:supportsRtl="true"
android:theme="#style/AppTheme"
tools:replace="android:theme"> <!-- This line solves the merger issue -->
However since my Library theme for the Activity is getting replaced by the app module which is still using Theme.AppCompat.Light.DarkActionBar as a parent theme, the default ActionBar is still there and when I try to set the ToolBar as my ActionBar in the library Activity using the following line -
setSupportActionBar(mToolbar);
I am getting the following Exception -
--------- beginning of crash
10-12 02:54:32.171 28558-28558/noob.com.noobfilechooser E/AndroidRuntime: FATAL EXCEPTION: main
Process: noob.com.noobfilechooser, PID: 28558
java.lang.RuntimeException: Unable to start activity ComponentInfo{noob.com.noobfilechooser/com.noob.noobfilechooser.NoobFileActivity}: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2434)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1347)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5451)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor. Do not request Window.FEATURE_SUPPORT_ACTION_BAR and set windowActionBar to false in your theme to use a Toolbar instead.
at android.support.v7.app.AppCompatDelegateImplV9.setSupportActionBar(AppCompatDelegateImplV9.java:199)
at android.support.v7.app.AppCompatActivity.setSupportActionBar(AppCompatActivity.java:130)
at com.noob.noobfilechooser.NoobFileActivity.onCreate(NoobFileActivity.java:60)
at android.app.Activity.performCreate(Activity.java:6323)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2494)
at android.app.ActivityThread.access$900(ActivityThread.java:153)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1347)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5451)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
I have tried calling
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
which have no effect on the exception. Is there anything I can do to use Toolbar in my library Activity?
OK, it was really silly. I was setting the theme in my Application element in the library manifest, while I should have been setting it on the Activity instead.
Correct way
<application
android:allowBackup="true"
android:label="#string/app_name"
android:supportsRtl="true">
<activity android:theme="#style/NoobAppTheme"
android:name=".NoobFileActivity">
</activity>
</application>
Wrong way
<application
android:allowBackup="true"
android:label="#string/app_name"
android:theme="#style/NoobAppTheme"
android:supportsRtl="true">
<activity android:name=".NoobFileActivity">
</activity>
</application>
I know that there are problems like this before. I have tried some of the solution given from the thread but it did not seem to solve the error for my application
This is my android.manifest file for the second activity
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme">
<activity
android:name=".MainActivity"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".RevGPAActivity"
android:label="#string/title_activity_rev_gpa">
<intent-filter>
<action android:name="com.example.user.testapp.RevGPAActivity" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<!-- ATTENTION: This was auto-generated to add Google Play services to your project for
App Indexing. See https://g.co/AppIndexing/AndroidStudio for more information. -->
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
</application>
And here is my MainActivity
private GoogleApiClient client;
Button start_rev_gpa;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// ATTENTION: This was auto-generated to implement the App Indexing API.
// See https://g.co/AppIndexing/AndroidStudio for more information.
client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
//Start Rev GPA
startRevGPA();
}
public void startRevGPA(){
start_rev_gpa = (Button)findViewById(R.id.startRevGPA);
start_rev_gpa.setOnClickListener(
new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent("com.example.user.testapp.RevGPAActivity");
startActivity(intent);
}
}
);
}
I did not do anything on the xml file like android:onClick or anything. The app hangs for about 3 seconds then it stopped working
Logcat
FATAL EXCEPTION: main
Process: com.example.user.testapp, PID: 29051
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.testapp/com.example.user.testapp.RevGPAActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:151)
at android.support.v7.app.ActionBarActivityDelegateBase.onCreate(ActionBarActivityDelegateBase.java:138)
at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:123)
at com.example.user.testapp.RevGPAActivity.onCreate(RevGPAActivity.java:10)
at android.app.Activity.performCreate(Activity.java:5937)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Solved my own problem. If someone stumbled on the same error, the target activity should be extending Activity not ActionBarActivity
You need to use a Theme.AppCompat theme (or descendant) with this activity
As you see in log file: You need to use a Theme.AppCompat theme (or descendant) with this activity could you check `#style/AppTheme" in style.xml of your project, this style need have parent="#style/Theme.AppCompat" or descendant ò
Hello I' making this project in Android when i start the dialog Activity from Main Activity.
These are the related files:
Main Activity:http://pastebin.com/xyDbBSj4
Dialogs Activity:http://pastebin.com/f6jGC1CH
I have this error on logcat:
FATAL EXCEPTION: main
Process: com.android4dev.navigationview, PID: 30736
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.android4dev.navigationview/com.android4dev.navigationview.ui.activities.DialogsActivity}:
java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:122)
at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:146)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
at com.android4dev.navigationview.ui.activities.BaseActivity.onCreate(BaseActivity.java:36)
at com.android4dev.navigationview.ui.activities.DialogsActivity.onCreate(DialogsActivity.java:43)
1- You should declare that your application will be stylized using Theme.AppCompat in your Android Manifest.
Something like this:
<activity
android:name=".my.packageactivity.MyOwnActivity"
android:label="#string/app_name"
android:theme="#style/Theme.AppCompat"/>
2- Or maybe declare that the whole application will be stylized using AppCompat.
<application
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/Theme.AppCompat">
3- If you want to set your own style later, you'll have to create a style.xml.
3.1- Using the whole application:
<application
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:theme="#style/MyOwnStyle">
3.2- Using the activity>
<activity
android:name=".my.packageactivity.MyOwnActivity"
android:label="#string/app_name"
android:theme="#style/MyOwnStyle"/>
And then set the parent to Theme.AppCompat inside your new style.xml file:
<resources>
<style name="MyOwnStyle" parent="Theme.AppCompat">
[...]
</style>
</resources>
I know it is simple but I wasnt able to fix it.Tried many solution from SOF.com but none worked. I am trying to display a title for activity and throws NPE. Using API19 for testing.Below are the codes:
In the activity:
public class DisplayImageActivity extends RootActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
getActionBar().setTitle("Image Preview");
In the Manifest:
<application
android:allowBackup="true"
android:icon="#drawable/icon"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name=".DisplayImageActivity"
android:label="< app name >"
android:screenOrientation="portrait" >
</activity>
In the style.xml:
<style name="AppTheme" parent="Base.Theme.AppCompat.Light.DarkActionBar">
Finally, the logcat says:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.kittu.<> /com.example.kittu.<>.DisplayImageActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2334)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2392)
at android.app.ActivityThread.access$900(ActivityThread.java:169)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5487)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.kittu.< >.DisplayImageActivity.onCreate(DisplayImageActivity.java:44)
at android.app.Activity.performCreate(Activity.java:5451)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1093)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
If you are using the support library, your activity needs to extend it
import android.support.v7.app.AppCompatActivity
public class MainActivity extends AppCompatActivity{
and use getSupportActionBar() instead of getActionBar()
I think you are using AppCompat, then you should use getSupportActionBar() instead of getActionBar().
Change this:
getActionBar().setTitle("Image Preview");
to this:
getSupportActionBar().setTitle("Image Preview");
Hope this helps :)
I know that this question has been asked before, but the provided answers did not solve my case, so I'll ask for an individual solution.
My code
My AndroidManifest.xml looks like this:
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
>
<activity
android:name=".MainActivity"
android:label="#string/app_name"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".KategorieAuswahl"
android:label="#string/title_activity_kategorie_auswahl" >
</activity>
<activity
android:name=".ZeigeFragen"
android:label="#string/title_activity_zeige_fragen" >
</activity>
</application>
And my styles.xml looks like this:
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
</style>
</resources>
I want my App to open in fullscreen and to hide the TitleBar. The first thing I did was to add a android:theme="#android:style/Theme.NoTitleBar.Fullscreen" attribute to the <application>-Tag of my AndroidManifest.xml.
This leads to the error You need to use a Theme.AppCompat theme (or descendant) with this activity. Here is the full stacktrace:
05-27 21:24:26.889 2121-2121/de.test.myapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{de.test.myapp/de.test.myapp.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:113)
at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:146)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
at de.test.myapp.MainActivity.onCreate(MainActivity.java:24)
at android.app.Activity.performCreate(Activity.java:5008)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
at android.app.ActivityThread.access$600(ActivityThread.java:130)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4745)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
There are multiple questions on stackoverflow referencing this error.
Approach #1
One solution suggests to change the Java inheritance from ActionBarActivity to Activity and leave the manifest as it is.
So I updated my the <style> element in my styles.xml and removed the DarkActionBar part:
<style name="AppTheme" parent="Theme.AppCompat.Light">
This still gives me the same error.
Approach #2
The next solution suggests to change my styles.xml's parent attribute from
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
to <style name="AppTheme" parent="Theme.AppCompat">
This makes it possible to use android:theme="#style/Theme.AppCompat.NoActionBar" for my <activity>, but I don't see an option to make it fullscreen then.
Approach #3
Another solution soggests to add <item name="android:windowNoTitle">true</item> to my <style> element but this doesn't change anything at all.
Conclusion
I really tried a lot, but nothing seems to work. Anyway I have problems understanding the theme inheritance chain and when I may use .NoTitleBar and .Fullscreen.
After all I don't care which theme to use, as long I can make the app fullscreen without a title bar. Can you help me to pick the right attributes?
extend ActionBarActivity or the new one, and use Theme.AppCompat.NoActionBar, now in your Activity
if (Build.VERSION.SDK_INT < 16) {
Activity.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
}else{
Activity.getWindow().getDecorView().
setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
}
Hope it helps..