Declaring String Arrays Causing Issues

Question

I am trying to declare a string array which I will be working with in my code. I have done this two ways, both of which I thought to be viable options, but one causes my app to crash on load without fail.

Working Code:

private String[] list = {"apple", "pear"};

Not Working Code:

Resources res = getResources();
private String[] list = res.getStringArray(R.array.Fruit);

The weird thing is, the latter code was copied directly from the Android String Resource page. I've made sure that the array (In this case titled Fruit ) exists, and am now kind of lost.

The Log Cat Error I am getting is as follows:

02-25 12:38:18.015: ERROR/AndroidRuntime(605): FATAL EXCEPTION: main
02-25 12:38:18.015: ERROR/AndroidRuntime(605): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.ikiar.appname/com.ikiar.appname.Main}: java.lang.NullPointerException
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.os.Looper.loop(Looper.java:123)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread.main(ActivityThread.java:4627)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at java.lang.reflect.Method.invokeNative(Native Method)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at java.lang.reflect.Method.invoke(Method.java:521)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at dalvik.system.NativeStart.main(Native Method)
02-25 12:58:52.284: ERROR/AndroidRuntime(717): Caused by: java.lang.NullPointerException
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.content.ContextWrapper.getResources(ContextWrapper.java:80)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at com.ikiar.appname.Main.<init>(Main.java:24)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at java.lang.Class.newInstanceImpl(Native Method)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at java.lang.Class.newInstance(Class.java:1429)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
02-25 12:58:52.284: ERROR/AndroidRuntime(717):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)

Thank you for your help!

EDIT: More Log Cat information, Line of code @ location of crash added

@ Location of Crash:

Resources res = getResources();

Solution:

Moved the location of Resources res - getResources(); into the onCreate method.

Answer 1

You've set the string-array in the string.xml file. If you want to use:

private String[] list = res.getStringArray(R.array.Fruit);

Try to create an array.xml file in the values folder and there put your Fruit array.

Answer 2

You get a Nullpointer Exception. I guess "res" is null. What does System.out.println(res) say!? When it says "null" then your res is not loaded properly.