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POFragment Activity Failing to inlfate
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13782499
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AcceptedAnswerId
13782591
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2
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3
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CreationDate
2012-12-08T22:17:19.993
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2012-12-08T22:29:55.323
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2012-12-08T22:25:08.617
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I've used the basic layout created from the Eclipse "Master/Detail" layout. I've modified it out and added external pages. However, when I now try to load just ContactListActivity.java, it fails to load giving me the logcat error below. Any ideas on what I'm doing wrong? ContactListActivity.java <pre><code>package com.cyphrd.chirpd; import com.cyphrd.chirpd.R; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.view.Menu; import android.view.MenuItem; /** * An activity representing a list of Contacts. This activity * has different presentations for handset and tablet-size devices. On * handsets, the activity presents a list of items, which when touched, * lead to a {@link ContactChatActivity} representing * item details. On tablets, the activity presents the list of items and * item details side-by-side using two vertical panes. * * The activity makes heavy use of fragments. The list of items is a * {@link ContactListFragment} and the item details * (if present) is a {@link ContactChatFragment}. * * This activity also implements the required * {@link ContactListFragment.Callbacks} interface * to listen for item selections. */ public class ContactListActivity extends FragmentActivity implements ContactListFragment.Callbacks { /** * Whether or not the activity is in two-pane mode, i.e. running on a tablet * device. */ private boolean mTwoPane; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_contact_list); if (findViewById(R.id.contact_detail_container) != null) { // The detail container view will be present only in the // large-screen layouts (res/values-large and // res/values-sw600dp). If this view is present, then the // activity should be in two-pane mode. mTwoPane = true; // In two-pane mode, list items should be given the // 'activated' state when touched. ((ContactListFragment) getSupportFragmentManager() .findFragmentById(R.id.contact_list)) .setActivateOnItemClick(true); } // TODO: If exposing deep links into your app, handle intents here. } /** * Callback method from {@link ContactListFragment.Callbacks} * indicating that the item with the given ID was selected. */ @Override public void onItemSelected(String id) { if (mTwoPane) { // In two-pane mode, show the detail view in this activity by // adding or replacing the detail fragment using a // fragment transaction. Bundle arguments = new Bundle(); arguments.putString(ContactChatFragment.ARG_ITEM_ID, id); ContactChatFragment fragment = new ContactChatFragment(); fragment.setArguments(arguments); getSupportFragmentManager().beginTransaction() .replace(R.id.contact_detail_container, fragment) .commit(); } else { // In single-pane mode, simply start the detail activity // for the selected item ID. Intent detailIntent = new Intent(this, ContactChatActivity.class); detailIntent.putExtra(ContactChatFragment.ARG_ITEM_ID, id); startActivity(detailIntent); } } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); menu.add("Search") .setIcon(R.drawable.ic_search) .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT); menu.add("Add Contact") .setIcon(R.drawable.ic_add_person) .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT); menu.add("Settings").setIcon(R.drawable.ic_settings); //Whatever else is under the "More" menu return true; } } </code></pre> ContactListFragment.java <pre><code>package com.cyphrd.chirpd; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ListView; import com.cyphrd.chirpd.dummy.DummyContent; /** * A list fragment representing a list of Contacts. This fragment * also supports tablet devices by allowing list items to be given an * 'activated' state upon selection. This helps indicate which item is * currently being viewed in a {@link ContactChatFragment}. * * Activities containing this fragment MUST implement the {@link Callbacks} * interface. */ public class ContactListFragment extends ListFragment { /** * The serialization (saved instance state) Bundle key representing the * activated item position. Only used on tablets. */ private static final String STATE_ACTIVATED_POSITION = "activated_position"; /** * The fragment's current callback object, which is notified of list item * clicks. */ private Callbacks mCallbacks = sDummyCallbacks; /** * The current activated item position. Only used on tablets. */ private int mActivatedPosition = ListView.INVALID_POSITION; /** * A callback interface that all activities containing this fragment must * implement. This mechanism allows activities to be notified of item * selections. */ public interface Callbacks { /** * Callback for when an item has been selected. */ public void onItemSelected(String id); } /** * A dummy implementation of the {@link Callbacks} interface that does * nothing. Used only when this fragment is not attached to an activity. */ private static Callbacks sDummyCallbacks = new Callbacks() { @Override public void onItemSelected(String id) { } }; /** * Mandatory empty constructor for the fragment manager to instantiate the * fragment (e.g. upon screen orientation changes). */ public ContactListFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // TODO: replace with a real list adapter. setListAdapter(new ArrayAdapter<DummyContent.DummyItem>( getActivity(), android.R.layout.simple_list_item_activated_1, android.R.id.text1, DummyContent.ITEMS)); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); // Restore the previously serialized activated item position. if (savedInstanceState != null && savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) { setActivatedPosition(savedInstanceState.getInt(STATE_ACTIVATED_POSITION)); } } @Override public void onAttach(Activity activity) { super.onAttach(activity); // Activities containing this fragment must implement its callbacks. if (!(activity instanceof Callbacks)) { throw new IllegalStateException("Activity must implement fragment's callbacks."); } mCallbacks = (Callbacks) activity; } @Override public void onDetach() { super.onDetach(); // Reset the active callbacks interface to the dummy implementation. mCallbacks = sDummyCallbacks; } @Override public void onListItemClick(ListView listView, View view, int position, long id) { super.onListItemClick(listView, view, position, id); // Notify the active callbacks interface (the activity, if the // fragment is attached to one) that an item has been selected. mCallbacks.onItemSelected(DummyContent.ITEMS.get(position).id); } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (mActivatedPosition != ListView.INVALID_POSITION) { // Serialize and persist the activated item position. outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition); } } /** * Turns on activate-on-click mode. When this mode is on, list items will be * given the 'activated' state when touched. */ public void setActivateOnItemClick(boolean activateOnItemClick) { // When setting CHOICE_MODE_SINGLE, ListView will automatically // give items the 'activated' state when touched. getListView().setChoiceMode(activateOnItemClick ? ListView.CHOICE_MODE_SINGLE : ListView.CHOICE_MODE_NONE); } private void setActivatedPosition(int position) { if (position == ListView.INVALID_POSITION) { getListView().setItemChecked(mActivatedPosition, false); } else { getListView().setItemChecked(position, true); } mActivatedPosition = position; } } </code></pre> XML of layouts: activity_contact_list: <pre><code> <fragment xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/contact_list" android:name="com.cyphrd.chirp.ContactListFragment" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_marginLeft="16dp" android:layout_marginRight="16dp" tools:context=".ContactListActivity" tools:layout="@android:layout/list_content" /> </code></pre> activity_contact_twopane.xml <pre><code>  <fragment android:id="@+id/contact_list" android:name="com.cyphrd.chirp.ContactListFragment" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" tools:layout="@android:layout/list_content" /> <FrameLayout android:id="@+id/contact_detail_container" android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="3" /> </LinearLayout> </code></pre> Logcat: <pre><code>12-08 15:11:31.978: E/AndroidRuntime(7071): FATAL EXCEPTION: main 12-08 15:11:31.978: E/AndroidRuntime(7071): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.cyphrd.chirpd/com.cyphrd.chirpd.ContactListActivity}: android.view.InflateException: Binary XML file line #1: Error inflating class fragment 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2049) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2083) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread.access$600(ActivityThread.java:134) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1233) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.os.Handler.dispatchMessage(Handler.java:99) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.os.Looper.loop(Looper.java:137) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread.main(ActivityThread.java:4697) 12-08 15:11:31.978: E/AndroidRuntime(7071): at java.lang.reflect.Method.invokeNative(Native Method) 12-08 15:11:31.978: E/AndroidRuntime(7071): at java.lang.reflect.Method.invoke(Method.java:511) 12-08 15:11:31.978: E/AndroidRuntime(7071): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787) 12-08 15:11:31.978: E/AndroidRuntime(7071): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:554) 12-08 15:11:31.978: E/AndroidRuntime(7071): at dalvik.system.NativeStart.main(Native Method) 12-08 15:11:31.978: E/AndroidRuntime(7071): Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class fragment 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:697) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.view.LayoutInflater.inflate(LayoutInflater.java:466) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.view.LayoutInflater.inflate(LayoutInflater.java:396) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.view.LayoutInflater.inflate(LayoutInflater.java:352) 12-08 15:11:31.978: E/AndroidRuntime(7071): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:255) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.Activity.setContentView(Activity.java:1879) 12-08 15:11:31.978: E/AndroidRuntime(7071): at com.cyphrd.chirpd.ContactListActivity.onCreate(ContactListActivity.java:39) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.Activity.performCreate(Activity.java:4539) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2013) 12-08 15:11:31.978: E/AndroidRuntime(7071): ... 11 more 12-08 15:11:31.978: E/AndroidRuntime(7071): Caused by: android.support.v4.app.Fragment$InstantiationException: Unable to instantiate fragment com.cyphrd.chirp.ContactListFragment: make sure class name exists, is public, and has an empty constructor that is public 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.support.v4.app.Fragment.instantiate(Fragment.java:401) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.support.v4.app.Fragment.instantiate(Fragment.java:369) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.support.v4.app.FragmentActivity.onCreateView(FragmentActivity.java:272) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:669) 12-08 15:11:31.978: E/AndroidRuntime(7071): ... 20 more 12-08 15:11:31.978: E/AndroidRuntime(7071): Caused by: java.lang.ClassNotFoundException: com.cyphrd.chirp.ContactListFragment 12-08 15:11:31.978: E/AndroidRuntime(7071): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 12-08 15:11:31.978: E/AndroidRuntime(7071): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 12-08 15:11:31.978: E/AndroidRuntime(7071): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 12-08 15:11:31.978: E/AndroidRuntime(7071): at android.support.v4.app.Fragment.instantiate(Fragment.java:391) 12-08 15:11:31.978: E/AndroidRuntime(7071): ... 23 more </code></pre> Manifest.xml: <pre><code><activity android:name="com.cyphrd.chirpd.ContactListActivity" android:label="@string/title_contact_list" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="com.cyphrd.chirpd.ContactChatActivity" android:label="@string/title_contact_detail" android:parentActivityName="com.cyphrd.chirpd.ContactListActivity" > <meta-data android:name="android.support.PARENT_ACTIVITY" android:value=".ContactListActivity" /> </activity> </code></pre>
Tags
<android><android-fragments><android-fragmentactivity>
Title
Fragment Activity Failing to inlfate
singulars
PostAcceptedAnswerId
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. USRijvi Rajib
UserOwnerUserId
1. USRijvi Rajib
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
 singulars
 PostTypePostTypeId
 PTAnswer
2. PO
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1. This table or related slice is empty.
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.