java.lang.NullPointer Exception in getResources().getString(R.string.value);

Question

I want one constant value in all activities so I have written it in string.xml file.

Now, to get that value in .java file, I am writing code as below :

getResources().getString(R.string.my_website); - This is 18 line of Splash Class

I am calling this code in main class as below :

public class Splash extends Activity {
    final String WebsiteURL = getResources().getString(R.string.my_website);
}

but it is giving me java.lang.NullPointerException. Am I writing anything wrong?

This is the correlating strings.xml:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="my_website">http://www.mytestbuddy.com</string>
</resources>

Logcat:

01-30 17:57:15.853: E/AndroidRuntime(1553): FATAL EXCEPTION: main
01-30 17:57:15.853: E/AndroidRuntime(1553): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.Mobile.mytestbuddy/com.Mobile.mytestbuddy.Splash}: java.lang.NullPointerException
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.os.Looper.loop(Looper.java:130)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread.main(ActivityThread.java:3683)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at java.lang.reflect.Method.invokeNative(Native Method)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at java.lang.reflect.Method.invoke(Method.java:507)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at dalvik.system.NativeStart.main(Native Method)
01-30 17:57:15.853: E/AndroidRuntime(1553): Caused by: java.lang.NullPointerException
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.content.ContextWrapper.getResources(ContextWrapper.java:80)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at com.Mobile.mytestbuddy.Splash.<init>(Splash.java:18)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at java.lang.Class.newInstanceImpl(Native Method)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at java.lang.Class.newInstance(Class.java:1409)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-30 17:57:15.853: E/AndroidRuntime(1553):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
01-30 17:57:15.853: E/AndroidRuntime(1553):     ... 11 more

Answer 1

According to your edits you're trying to access the resources before the Activity has been created. This is not possible, since the required Context is not available yet during that point.

You'll need to set your websiteUrl from within the onCreate(...) method.

--Old answer for reference--

 getResources().getString(R.string.my_website);

As you can see, string has to be written in lowercase. Also you should not be looking for an Integer but a String.