NullPointerException on TextView setText

Question

I'm very new to Android. This is a couple of lines added to the MyFirstApp guide referenced in the Eclipse ADT. I'm just trying to change the text in a TextView. I'm embarrassed that I've been at this for hours now and still can't find a solution. Any help is appreciated :-) MainActivity.Java ``` public class MainActivity extends ActionBarActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); TextView objTV = (TextView)this.findViewById(R.id.tv_id); objTV.setText("test"); if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()).commit(); } } ... } ``` fragment_main.xml ``` <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" a…

Accepted Answer

The `TextView` is in layout `fragment_main` but you've only inflated `activity_main` with `setContentView()`. The view you're trying to find is not in the activity view hierarchy.

Possible solutions:

Move the `TextView` to your activity layout.

Move the code accessing the `TextView` to the fragment's `onCreateView()`.

NullPointerException on TextView setText

Solution

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