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POandroid ViewPager: unable to switch pages onClick
 

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  1. POandroid ViewPager: unable to switch pages onClick
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    <p>i wanted to know if someone can help me solve this issue. I have a button setup and when its clicked, its supposed to navigate to another viewpager page. But everytime its clicked, the app crashes returning the error at onClick at fragmenttab2 class. Here is my Main Activity.</p> <pre><code>public class MainActivity extends SherlockFragmentActivity { ViewPager viewPager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); viewPager = (ViewPager) findViewById(R.id.pager); viewPager.setAdapter(new ViewPagerAdapter(getSupportFragmentManager())); viewPager.setCurrentItem(1); } } </code></pre> <p>Here is the fragment containing the onClick:</p> <pre><code>public class FragmentTab1 extends SherlockFragment { ViewPager viewPager; @Override public void onActivityCreated(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Activity activity = getActivity(); if (activity != null) { addListenerOnButton(); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragmenttab1, container, false); return view; } public void addListenerOnButton() { Button nextfrag = (Button) getView().findViewById(R.id.btn_nextfrag); nextfrag.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ((ViewPager) viewPager.findViewById(R.id.pager)).setCurrentItem(1); } }); } </code></pre> <p>}</p> <p>The log:</p> <pre><code>E/AndroidRuntime java.lang.NullPointerException E/AndroidRuntime com.test.seriessample.FragmentTab1$1.onClick(FragmentTab1.java:58) </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USAashir
    1. USAashir
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. COcan you post your Log errors please? And where do you create your viewPager?
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      1. POandroid ViewPager: unable to switch pages onClick
      1. USDyna
    2. COerror log posted. and its in the MainActivity but the adapter is seperate.
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      1. POandroid ViewPager: unable to switch pages onClick
      1. USAashir
 

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