CODEWITHSUNDEEP
androidandroid-fragmentsandroid-viewpagerandroid-fragmentactivity
user2110763
user2110763

Reputation: 23

Android - NullPointerException on setAdapter ViewPager

I have a little problem. I'm trying to create a layout with fragment, but when I call the setAdapter method I have a Java NullPointerException, and I can't find the error. Thanks all!

Class Code

public class Agenda extends FragmentActivity{

PagerAdapter mPagerAdapter;

ViewPager mViewPager;

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.agenda_sw);

    mPagerAdapter = new PagerAdapter(getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.agendaPager);

    mViewPager.setAdapter(mPagerAdapter); //Line 32, the error is on this line.

}

xml code 

<android.support.v4.view.ViewPager
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/agenda_sw"
android:layout_width="match_parent"
android:layout_height="match_parent" 
/>

LogCat 

03-04 11:06:14.686: E/AndroidRuntime(1356): FATAL EXCEPTION: main
03-04 11:06:14.686: E/AndroidRuntime(1356): java.lang.RuntimeException: Unable to start activity ComponentInfo{conf.main/conf.main.Agenda}: java.lang.NullPointerException
...
03-04 11:06:14.686: E/AndroidRuntime(1356): Caused by: java.lang.NullPointerException
03-04 11:06:14.686: E/AndroidRuntime(1356): at conf.main.Agenda.onCreate(Agenda.java:32)

Upvotes: 1

Views: 3922

Answers (1)

Leonidos
Leonidos

Reputation: 10518

wrong viewpager id. You wrote in xml:

android:id="@+id/agenda_sw"

But in code you find for R.id.agendaPager and should for R.id.agenda_sw.

Upvotes: 4

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