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POPassing parameters from Android FragmentActivity to Fragment
 

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    <p>When Im trying to pass a parameter from FragmentActivity to a Fragment it gives me null pointer exception in the getArguments() in the Fragment.</p> <p>Here is my FragmentActivity Code</p> <pre><code> public class IndexChartActivity extends FragmentActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.index_chart); IndexFragmentActivity indexFragment = (IndexFragmentActivity)getSupportFragmentManager().findFragmentById(R.id.index_fragment); indexFragment.newInstance("ASPI"); } } </code></pre> <p>Here is the index_chart.xml</p> <pre><code> &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#FFFFFF" android:orientation="vertical" &gt; &lt;fragment android:id="@+id/header_fragment" android:name="com.lk.ignitionit.cse.util.HeaderFragmentActivity" android:layout_width="match_parent" android:layout_height="wrap_content" /&gt; &lt;fragment android:id="@+id/index_fragment" android:name="com.lk.ignitionit.cse.util.IndexFragmentActivity" android:layout_width="match_parent" android:layout_height="wrap_content" /&gt; &lt;fragment android:name="com.lk.ignitionit.cse.util.ChartFragmentActivity" android:layout_width="match_parent" android:layout_height="wrap_content" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>and Here is the Fragment</p> <pre><code>public class IndexFragmentActivity extends Fragment { protected ImageView ivASPI; protected ImageView ivMPI; protected ImageView ivSP; protected TextView tvMain; protected TextView tvTop; protected TextView tvBottom; String response = null; String result = null; String [] resultArr = null; Bundle b = new Bundle(); String indexType = null; int layout; IndexFragmentActivity f = null; public IndexFragmentActivity newInstance(String index) { f = new IndexFragmentActivity(); Bundle args = new Bundle(); args.putString("indextype", index); f.setArguments(args); return f; } public String getSelectedIndex() { return f.getArguments().getString("indextype"); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if(getSelectedIndex().equals("ASPI")){ layout = R.layout.aspi_header; }else if(getSelectedIndex().equals("MPI")){ layout = R.layout.mpi_header; }else{ layout = R.layout.sp_header; } View view = inflater.inflate(layout, container, false); tvMain = (TextView) view.findViewById(R.id.tv_main); tvTop = (TextView) view.findViewById(R.id.tv_top); tvBottom = (TextView) view.findViewById(R.id.tv_bottom); new ServiceAccess().execute(""); tvMain.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { b.putString("type", "S&amp;P SL20"); Activity activity = getActivity(); Intent intent = new Intent(activity, IndexChartActivity.class); intent.putExtras(b); startActivity(intent); } }); return view; } } </code></pre> <p>and Here is my ERROR</p> <pre><code>Caused by: java.lang.NullPointerException at com.lk.ignitionit.cse.util.IndexFragmentActivity.getSelectedIndex(IndexFragmentActivity.java:69) </code></pre> <p>I referred lots of stackoverflow questions relevant to this and tried the sample code given <a href="http://developer.android.com/guide/components/fragments.html" rel="nofollow">http://developer.android.com/guide/components/fragments.html</a> as well. But still no luck</p> <p>Really appreciate any feed back on this as this seems to be a very basic issue which I cannot figure out..</p> <p>Thanks in Advance </p>
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