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POClassCastException in DialogFragment in Android
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  1. POClassCastException in DialogFragment in Android
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    copied!<p>I am new to <code>Fragments</code> in Android. Just tried to learn about <code>DialogFragment</code>. But it says <code>classcastException</code>.</p> <pre><code>public class FragmentDialog extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_dialog); } void showDialog() { FragmentTransaction ft = getFragmentManager().beginTransaction(); Fragment prev = getFragmentManager().findFragmentByTag("dialog"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); DialogFragment newFragment = MyDialogFragment.newInstance(0); newFragment.show(getFragmentManager(), "dialog"); } public static class MyDialogFragment extends DialogFragment { static MyDialogFragment newInstance(int num) { MyDialogFragment f = new MyDialogFragment(); return f; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); int style = DialogFragment.STYLE_NORMAL, theme = 0; setStyle(style, theme); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_dialog, container, false); Button button = (Button) v.findViewById(R.id.show); button.setOnClickListener(new OnClickListener() { public void onClick(View v) { ((FragmentDialog)getActivity()).showDialog(); // Error is in this line. } }); return v; } } } </code></pre> <p><strong>LogCat error is:</strong></p> <pre><code>07-12 15:22:25.241: E/AndroidRuntime(6419): java.lang.ClassCastException: com.example.fragmentexample.FragmentTabs cannot be cast to com.example.fragmentexample.FragmentDialog 07-12 15:22:25.241: E/AndroidRuntime(6419): at com.example.fragmentexample.FragmentDialog$MyDialogFragment$1.onClick(FragmentDialog.java:74) </code></pre> <p><strong>Edit 1#</strong></p> <p>This <code>FragmentDialog</code> is the one tab of <code>FragmentTabs</code>.</p> <pre><code>public class FragmentTabs extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); final ActionBar bar = getActionBar(); bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE); ... ... bar.addTab(bar.newTab() .setText("Dialog") .setTabListener(new TabListener&lt;FragmentDialog.MyDialogFragment&gt;( this, "Dialog", FragmentDialog.MyDialogFragment.class))); ... ... } </code></pre> <p>This is why <code>((FragmentDialog)getActivity()).showDialog();</code> this line returns <code>com.example.fragmentexample.FragmentTabs cannot be cast to com.example.fragmentexample.FragmentDialog</code>. How can I get the activity as <code>MyDialogFragment</code>.</p> <p>Any help to solve this problem will be highly appreciated.</p> <p>Thanks</p>
 

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