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POWhen applying Theme to activity I get a nullpointer exception
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  1. POWhen applying Theme to activity I get a nullpointer exception
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    copied!<p>Hi I am new to Android development, I'm trying to set a activity's theme by including the theme in activity : <code>&lt;activity android:name="AddEventActivity" android:theme="@android:style/Theme.Dialog"&gt;&lt;/activity&gt;</code></p> <p>When running the application I get the following exception :</p> <pre><code> 07-23 13:00:34.965: E/AndroidRuntime(3599): FATAL EXCEPTION: main 07-23 13:00:34.965: E/AndroidRuntime(3599): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sadev.z/com.sadev.z.AddEventActivity}: java.lang.NullPointerException 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2100) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2125) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread.access$600(ActivityThread.java:140) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1227) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.os.Handler.dispatchMessage(Handler.java:99) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.os.Looper.loop(Looper.java:137) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread.main(ActivityThread.java:4898) 07-23 13:00:34.965: E/AndroidRuntime(3599): at java.lang.reflect.Method.invokeNative(Native Method) 07-23 13:00:34.965: E/AndroidRuntime(3599): at java.lang.reflect.Method.invoke(Method.java:511) 07-23 13:00:34.965: E/AndroidRuntime(3599): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 07-23 13:00:34.965: E/AndroidRuntime(3599): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 07-23 13:00:34.965: E/AndroidRuntime(3599): at dalvik.system.NativeStart.main(Native Method) 07-23 13:00:34.965: E/AndroidRuntime(3599): Caused by: java.lang.NullPointerException 07-23 13:00:34.965: E/AndroidRuntime(3599): at com.sadev.z.AddEventActivity.onCreate(AddEventActivity.java:87) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.Activity.performCreate(Activity.java:5206) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1083) 07-23 13:00:34.965: E/AndroidRuntime(3599): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2064) 07-23 13:00:34.965: E/AndroidRuntime(3599): ... 11 more </code></pre> <p>When I remove the code from the AndroidManifest.xml it works.</p> <p>What I want to do is display an Activity like a Dialog by using a theme.</p> <p>Is android:theme="@android:style/Theme.Dialog" a standard theme witch is included automatically in my project or should I add it, and where? or what am I doing wrong?</p> <p>Any help will be appreciated. </p>
 

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