Question

I am trying to populate data from database into a TextView using this code:

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
 TextView view = (TextView) findViewById(R.id.textView);

    db = (new DatabaseHelper(this)).getWritableDatabase();
    cursor = getCursor();
    cursor.moveToFirst();
    while (cursor.isAfterLast() == false) {
        String text =  cursor.getString(2);
       view.append(text);
        cursor.moveToNext();
    }

However I am getting a NullPointerException on this line:

 view.append(text);

and I am not sure about the reason as the view exists.

Answer 1

However I am getting a NullPointerException on this line:

view.append(text);
and I am not sure about the reason as the view exists.

If you are sure that view exists and is not null, then text has to be null. You could for instance rewrite it as view.append(text != null ? text : "(null)");