You need to hand your Context (Activity is-a Context) to the other
class, which is uses to access resources.
On Sep 23, 6:35 pm, gymshoe <[EMAIL PROTECTED]> wrote:
> I am having trouble accessing my XML resources from outside my main
> activity. I suspect this is easy to do, but I am a novice to android/
> java and this is driving me crazy.
>
> I want to declare a class so it is not nested, but rather public to
> all other classes in my program. However, when I create this class, I
> cannot access the XML resources, like I could in my main Activity.
> While "getString(R.string.def_id)" works fine in my main Activity, if
> I try this in my non-main class, Eclipse tells me "getString" is not
> defined for this class. I tried using
> "getResources().getString(R.string.def_id)" but it said getResources()
> cannot be resolved". I even created a dummy ContextWrapper so I could
> access resources that way:
> ContextWrapper context = new ContextWrapper(null);
> this.setId(context.getResources().getString(R.string.def_id), true);
> When I do this, the contextWrapper is created OK, but I get a null
> pointer exception thrown at the second line
> ("this.setId(context...").
>
> I have looked for similar problems on the web and forums but to no
> avail. Somebody posted that they were unable to use their resources in
> the initialization block of their main Activity, and could only use
> them in (or after) their onCreate() method where they worked fine. I
> suspect this is part of the same problem, but there was no solution
> posted to that thread...
>
> Any help would be greatly appreciated. Full code below:
>
> This works:
>
> DEFAULTS.XML:
> <?xml version="1.0" encoding="UTF-8"?>
> <resources>
> <string name="def_id">007</string>
> </resources>
>
> RESOURCEQUESTION.JAVA:
> package com.northwestradiology.com;
>
> import android.app.ListActivity;
> import android.os.Bundle;
> import android.util.Log;
>
> public class ResourceQuestion extends ListActivity {
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> Log.v("onCreate", "entering on create");
> Person1 me = new Person1();
> Log.v("onCreate", "def_id = " + getString(R.string.def_id));
>
> }
>
> }
>
> PERSON1.JAVA
> package com.northwestradiology.com;
>
> public class Person1 {
> public String Id;
> public Person1() {
> super();
> }
>
> }
>
> -------------------------------
>
> This doesn't work:
>
> DEFAULTS.XML:
> <?xml version="1.0" encoding="UTF-8"?>
> <resources>
> <string name="def_id">007</string>
> </resources>
>
> RESOURCEQUESTION.JAVA
> package com.northwestradiology.com;
>
> import android.app.ListActivity;
> import android.os.Bundle;
> import android.util.Log;
>
> public class ResourceQuestion extends ListActivity {
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState) {
> super.onCreate(savedInstanceState);
> Log.v("onCreate", "entering on create");
> Person1 me = new Person1();
> }
>
> }
>
> PERSON1.JAVA
> package com.northwestradiology.com;
>
> import android.content.ContextWrapper;
> import android.util.Log;
>
> public class Person1 {
> public String Id;
> public Person1() {
> super();
> ContextWrapper context = new ContextWrapper(null);
> Log.v("person construct", "after context wrapper...");
> this.Id = (context.getResources().getString(R.string.def_id));
> Log.v("person construct", "after getResources...");
>
> }
>
> }
>
> ERROR LOG:
> 09-24 01:28:56.985: VERBOSE/onCreate(2789): entering on create
>
> 09-24 01:28:56.985: VERBOSE/person construct(2789): after context
> wrapper...
>
> 09-24 01:28:56.985: DEBUG/AndroidRuntime(2789): Shutting down VM
>
> 09-24 01:28:56.997: WARN/dalvikvm(2789): threadid=3: thread exiting
> with uncaught exception (group=0x40010e28)
> 09-24 01:28:56.997: ERROR/AndroidRuntime(2789): Uncaught handler:
> thread main exiting due to uncaught exception
>
> 09-24 01:28:57.007: ERROR/AndroidRuntime(2789):
> java.lang.RuntimeException: Unable to start activity
> ComponentInfo{com.northwestradiology.com/
> com.northwestradiology.com.ResourceQuestion}:
> java.lang.NullPointerException
>
> etc...
>
> Thanks,
> Jim
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