我在运行时遇到了异常。它显示java.lang.illegalStateException VideoListFragment must be attached to SherlockFragmentActivity。我不知道如何解决这些问题。
下面我发布了代码。
logcat的：
08-18 06:00:39.086: E/AndroidRuntime(3068): FATAL EXCEPTION: main
08-18 06:00:39.086: E/AndroidRuntime(3068): Process: com.loco.android, PID: 3068
08-18 06:00:39.086: E/AndroidRuntime(3068): java.lang.IllegalStateException: VideoListFragment must be attached to a SherlockFragmentActivity.
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.actionbarsherlock.app.SherlockFragment.onAttach(SherlockFragment.java:25)
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.sit.loco.frgment.VideoListFragment.onAttach(VideoListFragment.java:178)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:894)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1115)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1478)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:478)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.View.measure(View.java:16497)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.View.measure(View.java:16497)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.View.measure(View.java:16497)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.View.measure(View.java:16497)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.View.measure(View.java:16497)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.Choreographer.doFrame(Choreographer.java:544)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.os.Handler.handleCallback(Handler.java:733)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.os.Handler.dispatchMessage(Handler.java:95)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.os.Looper.loop(Looper.java:136)
08-18 06:00:39.086: E/AndroidRuntime(3068): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-18 06:00:39.086: E/AndroidRuntime(3068): at java.lang.reflect.Method.invokeNative(Native Method)
08-18 06:00:39.086: E/AndroidRuntime(3068): at java.lang.reflect.Method.invoke(Method.java:515)
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-18 06:00:39.086: E/AndroidRuntime(3068): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-18 06:00:39.086: E/AndroidRuntime(3068): at dalvik.system.NativeStart.main(Native Method)
VideoListFragment.java：
public class VideoListFragment extends SherlockFragment {
OnVideoSelectedListener mCallback;
boolean loadingMore = false;
// create string variables
String YOUTUBE_USERNAME = "";
// create object of views
ListView list;
ProgressBar prgLoading;
Button btnRefresh;
Button btnLoadMore;
// create variable to get position, connection status, resources, and channel username
int position;
boolean isConnect = true;
Resources res;
String[] ChannelUsername;
// create object of custom adapter
VideoListAdapter vla;
// create arraylist variables
ArrayList<HashMap<String, String>> menuItems;
ProgressDialog pDialog;
// flag for current page
int current_page = 1;
int previous_page;
static final String KEY_ID = "id";
static final String KEY_TITLE = "title";
static final String KEY_THUMBNAIL = "thumbnail";
static final String KEY_DURATION = "duration";
// create interface listener
public interface OnVideoSelectedListener{
public void onVideoSelected(String ID);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
View v = inflater.inflate(R.layout.fragment_list, container, false);
// connect view objects and view id on xml
list = (ListView) v.findViewById(R.id.list);
btnRefresh = (Button) v.findViewById(R.id.btnRefresh);
menuItems = new ArrayList<HashMap<String, String>>();
// get value that passed from previous page
Bundle bundle = this.getArguments();
position = bundle.getInt("position", 0);
// get channel username and put selected channel to youtube api
res = getActivity().getResources();
ChannelUsername = res.getStringArray(R.array.channel_username);
YOUTUBE_USERNAME = ChannelUsername[position];
// create LoadMore button
btnLoadMore = new Button(getActivity());
btnLoadMore.setBackgroundResource(R.drawable.btn_default_holo_light);
btnLoadMore.setText(getString(R.string.load_more));
// adding load more button to lisview at bottom
list.addFooterView(btnLoadMore);
new loadFirstListView().execute();
// listener to handle load more buttton when clicked
btnLoadMore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// Starting a new async task
isConnect = true;
// new loadMoreListView().execute();
}
});
// listener to handle list when clicked
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
// TODO Auto-generated method stub
HashMap<String, String> item = new HashMap<String, String>();
item = menuItems.get(position);
mCallback.onVideoSelected(item.get("id"));
list.setItemChecked(position, true);
}
});
// listener to handle refresh button when clicked
btnRefresh.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
isConnect = true;
new loadFirstListView().execute();
}
});
return v;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity); ----> Error occurred here
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception.
try {
mCallback = (OnVideoSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
}
SherlockFrgament.java：
package com.actionbarsherlock.app;
import android.app.Activity;
import android.support.v4.app.Fragment;
import com.actionbarsherlock.internal.view.menu.MenuItemWrapper;
import com.actionbarsherlock.internal.view.menu.MenuWrapper;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import static android.support.v4.app.Watson.OnCreateOptionsMenuListener;
import static android.support.v4.app.Watson.OnOptionsItemSelectedListener;
import static android.support.v4.app.Watson.OnPrepareOptionsMenuListener;
public class SherlockFragment extends Fragment implements OnCreateOptionsMenuListener, OnPrepareOptionsMenuListener, OnOptionsItemSelectedListener {
private SherlockFragmentActivity mActivity;
public SherlockFragmentActivity getSherlockActivity() {
return mActivity;
}
@Override
public void onAttach(Activity activity) {
if (!(activity instanceof SherlockFragmentActivity)) {
throw new IllegalStateException(getClass().getSimpleName() + " must be attached to a SherlockFragmentActivity."); -->Error occurred here
}
mActivity = (SherlockFragmentActivity)activity;
super.onAttach(activity);
}
@Override
public void onDetach() {
mActivity = null;
super.onDetach();
}
@Override
public final void onCreateOptionsMenu(android.view.Menu menu, android.view.MenuInflater inflater) {
onCreateOptionsMenu(new MenuWrapper(menu), mActivity.getSupportMenuInflater());
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
//Nothing to see here.
}
@Override
public final void onPrepareOptionsMenu(android.view.Menu menu) {
onPrepareOptionsMenu(new MenuWrapper(menu));
}
@Override
public void onPrepareOptionsMenu(Menu menu) {
//Nothing to see here.
}
@Override
public final boolean onOptionsItemSelected(android.view.MenuItem item) {
return onOptionsItemSelected(new MenuItemWrapper(item));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
//Nothing to see here.
return false;
}
}
我不知道如何解决这个illegalStateException Error.Anybody可以帮我解决这个问题。谢谢。