Question

public class Database extends Activity {

private TextView tvInfo = (TextView)findViewById(R.id.tvInfo);
private Button btnInfo = (Button)findViewById(R.id.btnInfo);

Hello guys, probably this is just an newbie error in java, but why is this throwing me a NPE? I’m just declaring those variables and it gives me an NPE.

Answer 1

you need to code like below

private TextView tvInfo = null;
private Button btnInfo = null;
@Override
public void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.configuration);
            tvInfo = (TextView)findViewById(R.id.tvInfo);
            btnInfo = (Button)findViewById(R.id.btnInfo);
            ........
    }

Try above scenario, you will not get NullPointerException.