I understand that Android uses an applicaiton ID for File I/O when
using openFileInput and openFileOutput.
My question is if I create an instance of a class in the Activity
onCreate like the following and do some file IO from the new class,
why does it fail? If I make the MyClass an inner class of the Activity
class this works, so it has to be a context issue. Is there any way to
pass the activity context to the MyClass methods so the openFileInput
and openFileOutput work in the newly created objMyClass object?
public void onCreate(Bundle icicle)
{
MyClass objMyClass = new MyClass();
objMyClass.DoFileIO();
}
public class MyClass extends Activity
{
public void DoFileIO()
{
objFileInputStream = openFileInput("SomeFileName"); <--
NullPointerException
objInputStreamReader = new InputStreamReader
(objFileInputStream);
objBufferedReader = new BufferedReader
(objInputStreamReader);
}
}
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