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Android

Posted by Dana Rock
Dana Rock
Courses Plus Student 1,777 Points

Error in MainActivity.java

I have downloaded the latest ADK and created the Ribbit project and removed the fragment_main_list.xml item.

However the mViewPager = (ViewPager) findViewById(R.id.pager); line gives me an error.

How can I fix this error?

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());

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

4 Answers

Mark Josephsen
Mark Josephsen
8,803 Points

I would double check to make sure you have the correct import. Also, I'd double check the xml file to make sure you have an id of 'pager'

Mark Josephsen
Mark Josephsen
8,803 Points
Mark Josephsen
Mark Josephsen
8,803 Points

Do you have a closing brace for the onCreate method?

Dana Rock
PLUS
Dana Rock
Courses Plus Student 1,777 Points
Dana Rock
Dana Rock
Courses Plus Student 1,777 Points

Mark,

Thank you for you quick response.

Below is the total onCreate method. Yes I do have a closing brace.

Dan

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(getFragmentManager());

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

}
Dana Rock
PLUS
Dana Rock
Courses Plus Student 1,777 Points
Dana Rock
Dana Rock
Courses Plus Student 1,777 Points

Thank you again Mark!

Actually, I got frustrated and found and older version of Eclipse in my backup files.

Am reloading that version, which did not create a fragment_main portion.

Dan