Java tutorial
/* * Firetweet - Twitter client for Android * * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.getlantern.firetweet.fragment.support; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.ActivityNotFoundException; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.graphics.Rect; import android.nfc.NdefMessage; import android.nfc.NdefRecord; import android.nfc.NfcAdapter.CreateNdefMessageCallback; import android.nfc.NfcEvent; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.AsyncTaskLoader; import android.support.v4.content.Loader; import android.support.v4.view.ViewPager; import android.support.v7.widget.CardView; import android.text.method.LinkMovementMethod; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; import org.getlantern.firetweet.R; import org.getlantern.firetweet.activity.iface.IThemedActivity; import org.getlantern.firetweet.activity.support.AccountSelectorActivity; import org.getlantern.firetweet.activity.support.UserListSelectorActivity; import org.getlantern.firetweet.adapter.support.SupportTabsAdapter; import org.getlantern.firetweet.fragment.iface.IBaseFragment.SystemWindowsInsetsCallback; import org.getlantern.firetweet.fragment.iface.SupportFragmentCallback; import org.getlantern.firetweet.model.ParcelableUser; import org.getlantern.firetweet.model.ParcelableUserList; import org.getlantern.firetweet.model.SingleResponse; import org.getlantern.firetweet.util.AsyncTwitterWrapper; import org.getlantern.firetweet.util.LinkCreator; import org.getlantern.firetweet.util.MediaLoaderWrapper; import org.getlantern.firetweet.util.OnLinkClickHandler; import org.getlantern.firetweet.util.ParseUtils; import org.getlantern.firetweet.util.ThemeUtils; import org.getlantern.firetweet.util.FiretweetLinkify; import org.getlantern.firetweet.util.UserColorNameUtils; import org.getlantern.firetweet.util.Utils; import org.getlantern.firetweet.view.ColorLabelLinearLayout; import org.getlantern.firetweet.view.HeaderDrawerLayout; import org.getlantern.firetweet.view.HeaderDrawerLayout.DrawerCallback; import org.getlantern.firetweet.view.TabPagerIndicator; import twitter4j.Twitter; import twitter4j.TwitterException; import twitter4j.UserList; import static android.text.TextUtils.isEmpty; import static org.getlantern.firetweet.util.Utils.addIntentToMenu; import static org.getlantern.firetweet.util.Utils.getAccountColor; import static org.getlantern.firetweet.util.Utils.getTwitterInstance; import static org.getlantern.firetweet.util.Utils.openUserListDetails; import static org.getlantern.firetweet.util.Utils.openUserProfile; import static org.getlantern.firetweet.util.Utils.setMenuItemAvailability; public class UserListFragment extends BaseSupportFragment implements OnClickListener, LoaderCallbacks<SingleResponse<ParcelableUserList>>, DrawerCallback, SystemWindowsInsetsCallback, SupportFragmentCallback { private MediaLoaderWrapper mProfileImageLoader; private AsyncTwitterWrapper mTwitterWrapper; private ImageView mProfileImageView; private TextView mListNameView, mCreatedByView, mDescriptionView, mErrorMessageView; private View mErrorRetryContainer, mProgressContainer; private ColorLabelLinearLayout mUserListDetails; private Button mRetryButton; private HeaderDrawerLayout mHeaderDrawerLayout; private ViewPager mViewPager; private TabPagerIndicator mPagerIndicator; private CardView mCardView; private SupportTabsAdapter mPagerAdapter; private ParcelableUserList mUserList; private final BroadcastReceiver mStatusReceiver = new BroadcastReceiver() { @Override public void onReceive(final Context context, final Intent intent) { if (getActivity() == null || !isAdded() || isDetached()) return; final String action = intent.getAction(); final ParcelableUserList userList = intent.getParcelableExtra(EXTRA_USER_LIST); if (userList == null || mUserList == null) return; if (BROADCAST_USER_LIST_DETAILS_UPDATED.equals(action)) { if (userList.id == mUserList.id) { getUserListInfo(true); } } else if (BROADCAST_USER_LIST_SUBSCRIBED.equals(action) || BROADCAST_USER_LIST_UNSUBSCRIBED.equals(action)) { if (userList.id == mUserList.id) { getUserListInfo(true); } } } }; private boolean mUserListLoaderInitialized; private Fragment mCurrentVisibleFragment; @Override public boolean canScroll(float dy) { final Fragment fragment = mCurrentVisibleFragment; return fragment instanceof DrawerCallback && ((DrawerCallback) fragment).canScroll(dy); } @Override public void cancelTouch() { final Fragment fragment = mCurrentVisibleFragment; if (fragment instanceof DrawerCallback) { ((DrawerCallback) fragment).cancelTouch(); } } @Override public void fling(float velocity) { final Fragment fragment = mCurrentVisibleFragment; if (fragment instanceof DrawerCallback) { ((DrawerCallback) fragment).fling(velocity); } } @Override public boolean isScrollContent(float x, float y) { final ViewPager v = mViewPager; final int[] location = new int[2]; v.getLocationOnScreen(location); return x >= location[0] && x <= location[0] + v.getWidth() && y >= location[1] && y <= location[1] + v.getHeight(); } @Override public void scrollBy(float dy) { final Fragment fragment = mCurrentVisibleFragment; if (fragment instanceof DrawerCallback) { ((DrawerCallback) fragment).scrollBy(dy); } } @Override public boolean shouldLayoutHeaderBottom() { final HeaderDrawerLayout drawer = mHeaderDrawerLayout; final CardView card = mCardView; if (drawer == null || card == null) return false; return card.getTop() + drawer.getHeaderTop() - drawer.getPaddingTop() <= 0; } @Override public void topChanged(int offset) { } public void displayUserList(final ParcelableUserList userList) { if (userList == null || getActivity() == null) return; getLoaderManager().destroyLoader(0); mErrorRetryContainer.setVisibility(View.GONE); mProgressContainer.setVisibility(View.GONE); mUserList = userList; mUserListDetails.drawEnd(getAccountColor(getActivity(), userList.account_id)); mListNameView.setText(userList.name); final String displayName = UserColorNameUtils.getDisplayName(getActivity(), userList.user_id, userList.user_name, userList.user_screen_name, false); mCreatedByView.setText(getString(R.string.created_by, displayName)); final String description = userList.description; mDescriptionView.setVisibility(isEmpty(description) ? View.GONE : View.VISIBLE); mDescriptionView.setText(description); final FiretweetLinkify linkify = new FiretweetLinkify( new OnLinkClickHandler(getActivity(), getMultiSelectManager())); linkify.applyAllLinks(mDescriptionView, userList.account_id, false); mDescriptionView.setMovementMethod(LinkMovementMethod.getInstance()); mProfileImageLoader.displayProfileImage(mProfileImageView, userList.user_profile_image_url); invalidateOptionsMenu(); } @Override public Fragment getCurrentVisibleFragment() { return mCurrentVisibleFragment; } @Override public void onDetachFragment(Fragment fragment) { } @Override public void onSetUserVisibleHint(Fragment fragment, boolean isVisibleToUser) { mCurrentVisibleFragment = isVisibleToUser ? fragment : null; } @Override public boolean triggerRefresh(int position) { return false; } @Override public boolean getSystemWindowsInsets(Rect insets) { return false; } public void getUserListInfo(final boolean omit_intent_extra) { final LoaderManager lm = getLoaderManager(); lm.destroyLoader(0); final Bundle args = new Bundle(getArguments()); args.putBoolean(EXTRA_OMIT_INTENT_EXTRA, omit_intent_extra); if (!mUserListLoaderInitialized) { lm.initLoader(0, args, this); mUserListLoaderInitialized = true; } else { lm.restartLoader(0, args, this); } } @Override public void onActivityResult(final int requestCode, final int resultCode, final Intent data) { switch (requestCode) { case REQUEST_SELECT_USER: { if (resultCode != Activity.RESULT_OK || !data.hasExtra(EXTRA_USER) || mTwitterWrapper == null || mUserList == null) return; final ParcelableUser user = data.getParcelableExtra(EXTRA_USER); mTwitterWrapper.addUserListMembersAsync(mUserList.account_id, mUserList.id, user); return; } case REQUEST_SELECT_ACCOUNT: { final ParcelableUserList userList = mUserList; if (userList == null) return; if (resultCode == Activity.RESULT_OK) { if (data == null || !data.hasExtra(EXTRA_ID)) return; final long accountId = data.getLongExtra(EXTRA_ID, -1); openUserListDetails(getActivity(), accountId, userList.id, userList.user_id, userList.user_screen_name, userList.name); } break; } } super.onActivityResult(requestCode, resultCode, data); } @Override public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState) { final View view = inflater.inflate(R.layout.fragment_user_list, container, false); final ViewGroup listDetailsContainer = (ViewGroup) view.findViewById(R.id.list_details_container); final boolean isCompact = Utils.isCompactCards(getActivity()); if (isCompact) { inflater.inflate(R.layout.layout_user_list_details_compact, listDetailsContainer); } else { inflater.inflate(R.layout.layout_user_list_details, listDetailsContainer); } return view; } @Override public void onActivityCreated(final Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setHasOptionsMenu(true); final FragmentActivity activity = getActivity(); Utils.setNdefPushMessageCallback(activity, new CreateNdefMessageCallback() { @Override public NdefMessage createNdefMessage(NfcEvent event) { final ParcelableUserList userList = getUserList(); if (userList == null) return null; return new NdefMessage(new NdefRecord[] { NdefRecord.createUri( LinkCreator.getTwitterUserListLink(userList.user_screen_name, userList.name)), }); } }); mHeaderDrawerLayout.setDrawerCallback(this); mPagerAdapter = new SupportTabsAdapter(activity, getChildFragmentManager()); mViewPager.setAdapter(mPagerAdapter); mPagerIndicator.setViewPager(mViewPager); mPagerIndicator.setTabDisplayOption(TabPagerIndicator.LABEL); if (activity instanceof IThemedActivity) { mPagerIndicator.setStripColor(((IThemedActivity) activity).getCurrentThemeColor()); } else { } mTwitterWrapper = getApplication().getTwitterWrapper(); mProfileImageLoader = getApplication().getMediaLoaderWrapper(); mProfileImageView.setOnClickListener(this); mUserListDetails.setOnClickListener(this); mRetryButton.setOnClickListener(this); getUserListInfo(false); setupUserPages(); } private ParcelableUserList getUserList() { return mUserList; } @Override public void onStart() { super.onStart(); final IntentFilter filter = new IntentFilter(BROADCAST_USER_LIST_DETAILS_UPDATED); filter.addAction(BROADCAST_USER_LIST_SUBSCRIBED); filter.addAction(BROADCAST_USER_LIST_UNSUBSCRIBED); registerReceiver(mStatusReceiver, filter); } @Override public void onStop() { unregisterReceiver(mStatusReceiver); super.onStop(); } @Override public void onDestroyView() { mUserList = null; getLoaderManager().destroyLoader(0); super.onDestroyView(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.menu_user_list, menu); } @Override public void onPrepareOptionsMenu(Menu menu) { final AsyncTwitterWrapper twitter = getTwitterWrapper(); final ParcelableUserList userList = mUserList; final MenuItem followItem = menu.findItem(MENU_FOLLOW); if (followItem != null) { followItem.setEnabled(userList != null); if (userList == null) { followItem.setIcon(android.R.color.transparent); } } if (twitter == null || userList == null) return; final boolean isMyList = userList.user_id == userList.account_id; setMenuItemAvailability(menu, MENU_EDIT, isMyList); setMenuItemAvailability(menu, MENU_ADD, isMyList); setMenuItemAvailability(menu, MENU_DELETE, isMyList); final boolean isFollowing = userList.is_following; if (followItem != null) { followItem.setVisible(!isMyList); if (isFollowing) { followItem.setIcon(R.drawable.ic_action_cancel); followItem.setTitle(R.string.unsubscribe); } else { followItem.setIcon(R.drawable.ic_action_add); followItem.setTitle(R.string.subscribe); } } menu.removeGroup(MENU_GROUP_USER_LIST_EXTENSION); final Intent extensionsIntent = new Intent(INTENT_ACTION_EXTENSION_OPEN_USER_LIST); extensionsIntent.setExtrasClassLoader(getActivity().getClassLoader()); extensionsIntent.putExtra(EXTRA_USER_LIST, mUserList); addIntentToMenu(getActivity(), menu, extensionsIntent, MENU_GROUP_USER_LIST_EXTENSION); } @Override public boolean onOptionsItemSelected(final MenuItem item) { final AsyncTwitterWrapper twitter = getTwitterWrapper(); final ParcelableUserList userList = mUserList; if (twitter == null || userList == null) return false; switch (item.getItemId()) { case MENU_ADD: { if (userList.user_id != userList.account_id) return false; final Intent intent = new Intent(INTENT_ACTION_SELECT_USER); intent.setClass(getActivity(), UserListSelectorActivity.class); intent.putExtra(EXTRA_ACCOUNT_ID, userList.account_id); startActivityForResult(intent, REQUEST_SELECT_USER); break; } case MENU_DELETE: { if (userList.user_id != userList.account_id) return false; DestroyUserListDialogFragment.show(getFragmentManager(), userList); break; } case MENU_EDIT: { final Bundle args = new Bundle(); args.putLong(EXTRA_ACCOUNT_ID, userList.account_id); args.putString(EXTRA_LIST_NAME, userList.name); args.putString(EXTRA_DESCRIPTION, userList.description); args.putBoolean(EXTRA_IS_PUBLIC, userList.is_public); args.putLong(EXTRA_LIST_ID, userList.id); final DialogFragment f = new EditUserListDialogFragment(); f.setArguments(args); f.show(getFragmentManager(), "edit_user_list_details"); return true; } case MENU_FOLLOW: { if (userList.is_following) { DestroyUserListSubscriptionDialogFragment.show(getFragmentManager(), userList); } else { twitter.createUserListSubscriptionAsync(userList.account_id, userList.id); } return true; } case MENU_OPEN_WITH_ACCOUNT: { final Intent intent = new Intent(INTENT_ACTION_SELECT_ACCOUNT); intent.setClass(getActivity(), AccountSelectorActivity.class); intent.putExtra(EXTRA_SINGLE_SELECTION, true); startActivityForResult(intent, REQUEST_SELECT_ACCOUNT); break; } default: { if (item.getIntent() != null) { try { startActivity(item.getIntent()); } catch (final ActivityNotFoundException e) { Log.w(LOGTAG, e); return false; } } break; } } return true; } @Override public void onClick(final View view) { switch (view.getId()) { case R.id.retry: { getUserListInfo(true); break; } case R.id.profile_image: { if (mUserList == null) return; openUserProfile(getActivity(), mUserList.account_id, mUserList.user_id, mUserList.user_screen_name, null); break; } } } @Override public Loader<SingleResponse<ParcelableUserList>> onCreateLoader(final int id, final Bundle args) { mErrorMessageView.setText(null); mErrorMessageView.setVisibility(View.GONE); mErrorRetryContainer.setVisibility(View.GONE); mHeaderDrawerLayout.setVisibility(View.GONE); mProgressContainer.setVisibility(View.VISIBLE); setProgressBarIndeterminateVisibility(true); final long accountId = args != null ? args.getLong(EXTRA_ACCOUNT_ID, -1) : -1; final long userId = args != null ? args.getLong(EXTRA_USER_ID, -1) : -1; final long listId = args != null ? args.getLong(EXTRA_LIST_ID, -1) : -1; final String listName = args != null ? args.getString(EXTRA_LIST_NAME) : null; final String screenName = args != null ? args.getString(EXTRA_SCREEN_NAME) : null; final boolean omitIntentExtra = args == null || args.getBoolean(EXTRA_OMIT_INTENT_EXTRA, true); return new ParcelableUserListLoader(getActivity(), omitIntentExtra, getArguments(), accountId, listId, listName, userId, screenName); } @Override public void onLoadFinished(final Loader<SingleResponse<ParcelableUserList>> loader, final SingleResponse<ParcelableUserList> data) { if (data == null) return; if (getActivity() == null) return; if (data.getData() != null) { final ParcelableUserList list = data.getData(); displayUserList(list); mHeaderDrawerLayout.setVisibility(View.VISIBLE); mErrorRetryContainer.setVisibility(View.GONE); mProgressContainer.setVisibility(View.GONE); } else { if (data.hasException()) { mErrorMessageView.setText(data.getException().getMessage()); mErrorMessageView.setVisibility(View.VISIBLE); } mHeaderDrawerLayout.setVisibility(View.GONE); mErrorRetryContainer.setVisibility(View.VISIBLE); mProgressContainer.setVisibility(View.GONE); } setProgressBarIndeterminateVisibility(false); } @Override public void onLoaderReset(final Loader<SingleResponse<ParcelableUserList>> loader) { } @Override public void onBaseViewCreated(final View view, final Bundle savedInstanceState) { super.onBaseViewCreated(view, savedInstanceState); mHeaderDrawerLayout = (HeaderDrawerLayout) view.findViewById(R.id.details_container); mErrorRetryContainer = view.findViewById(R.id.error_retry_container); mProgressContainer = view.findViewById(R.id.progress_container); final View headerView = mHeaderDrawerLayout.getHeader(); final View contentView = mHeaderDrawerLayout.getContent(); mCardView = (CardView) headerView.findViewById(R.id.card); mUserListDetails = (ColorLabelLinearLayout) headerView.findViewById(R.id.user_list_details); mListNameView = (TextView) headerView.findViewById(R.id.list_name); mCreatedByView = (TextView) headerView.findViewById(R.id.created_by); mDescriptionView = (TextView) headerView.findViewById(R.id.description); mProfileImageView = (ImageView) headerView.findViewById(R.id.profile_image); mRetryButton = (Button) mErrorRetryContainer.findViewById(R.id.retry); mErrorMessageView = (TextView) mErrorRetryContainer.findViewById(R.id.error_message); mViewPager = (ViewPager) contentView.findViewById(R.id.view_pager); mPagerIndicator = (TabPagerIndicator) contentView.findViewById(R.id.view_pager_tabs); } @Override protected void fitSystemWindows(Rect insets) { super.fitSystemWindows(insets); final View progress = mProgressContainer, error = mErrorRetryContainer; final HeaderDrawerLayout content = mHeaderDrawerLayout; if (progress == null || error == null || content == null) { return; } progress.setPadding(insets.left, insets.top, insets.right, insets.bottom); error.setPadding(insets.left, insets.top, insets.right, insets.bottom); content.setPadding(insets.left, insets.top, insets.right, insets.bottom); content.setClipToPadding(false); } private void setupUserPages() { final Context context = getActivity(); final Bundle args = getArguments(), tabArgs = new Bundle(); if (args.containsKey(EXTRA_USER)) { final ParcelableUserList userList = args.getParcelable(EXTRA_USER_LIST); tabArgs.putLong(EXTRA_ACCOUNT_ID, userList.account_id); tabArgs.putLong(EXTRA_USER_ID, userList.user_id); tabArgs.putString(EXTRA_SCREEN_NAME, userList.user_screen_name); tabArgs.putLong(EXTRA_LIST_ID, userList.id); tabArgs.putString(EXTRA_LIST_NAME, userList.name); } else { tabArgs.putLong(EXTRA_ACCOUNT_ID, args.getLong(EXTRA_ACCOUNT_ID, -1)); tabArgs.putLong(EXTRA_USER_ID, args.getLong(EXTRA_USER_ID, -1)); tabArgs.putString(EXTRA_SCREEN_NAME, args.getString(EXTRA_SCREEN_NAME)); tabArgs.putLong(EXTRA_LIST_ID, args.getLong(EXTRA_LIST_ID, -1)); tabArgs.putString(EXTRA_LIST_NAME, args.getString(EXTRA_LIST_NAME)); } mPagerAdapter.addTab(UserListTimelineFragment.class, tabArgs, getString(R.string.statuses), null, 0, null); mPagerAdapter.addTab(UserListMembersFragment.class, tabArgs, getString(R.string.members), null, 1, null); mPagerAdapter.addTab(UserListSubscribersFragment.class, tabArgs, getString(R.string.subscribers), null, 2, null); mPagerIndicator.notifyDataSetChanged(); } public static class EditUserListDialogFragment extends BaseSupportDialogFragment implements DialogInterface.OnClickListener { private EditText mEditName, mEditDescription; private CheckBox mPublicCheckBox; private String mName, mDescription; private long mAccountId; private long mListId; private boolean mIsPublic; private AsyncTwitterWrapper mTwitterWrapper; @Override public void onClick(final DialogInterface dialog, final int which) { if (mAccountId <= 0) return; switch (which) { case DialogInterface.BUTTON_POSITIVE: { mName = ParseUtils.parseString(mEditName.getText()); mDescription = ParseUtils.parseString(mEditDescription.getText()); mIsPublic = mPublicCheckBox.isChecked(); if (mName == null || mName.length() <= 0) return; mTwitterWrapper.updateUserListDetails(mAccountId, mListId, mIsPublic, mName, mDescription); break; } } } @NonNull @Override public Dialog onCreateDialog(final Bundle savedInstanceState) { mTwitterWrapper = getApplication().getTwitterWrapper(); final Bundle bundle = savedInstanceState == null ? getArguments() : savedInstanceState; mAccountId = bundle != null ? bundle.getLong(EXTRA_ACCOUNT_ID, -1) : -1; mListId = bundle != null ? bundle.getLong(EXTRA_LIST_ID, -1) : -1; mName = bundle != null ? bundle.getString(EXTRA_LIST_NAME) : null; mDescription = bundle != null ? bundle.getString(EXTRA_DESCRIPTION) : null; mIsPublic = bundle == null || bundle.getBoolean(EXTRA_IS_PUBLIC, true); final Context wrapped = ThemeUtils.getDialogThemedContext(getActivity()); final AlertDialog.Builder builder = new AlertDialog.Builder(wrapped); final View view = LayoutInflater.from(wrapped).inflate(R.layout.edit_user_list_detail, null); builder.setView(view); mEditName = (EditText) view.findViewById(R.id.name); mEditDescription = (EditText) view.findViewById(R.id.description); mPublicCheckBox = (CheckBox) view.findViewById(R.id.is_public); if (mName != null) { mEditName.setText(mName); } if (mDescription != null) { mEditDescription.setText(mDescription); } mPublicCheckBox.setChecked(mIsPublic); builder.setTitle(R.string.user_list); builder.setPositiveButton(android.R.string.ok, this); builder.setNegativeButton(android.R.string.cancel, this); return builder.create(); } @Override public void onSaveInstanceState(final Bundle outState) { outState.putLong(EXTRA_ACCOUNT_ID, mAccountId); outState.putLong(EXTRA_LIST_ID, mListId); outState.putString(EXTRA_LIST_NAME, mName); outState.putString(EXTRA_DESCRIPTION, mDescription); outState.putBoolean(EXTRA_IS_PUBLIC, mIsPublic); super.onSaveInstanceState(outState); } } static class ParcelableUserListLoader extends AsyncTaskLoader<SingleResponse<ParcelableUserList>> { private final boolean mOmitIntentExtra; private final Bundle mExtras; private final long mAccountId, mUserId; private final long mListId; private final String mScreenName, mListName; private ParcelableUserListLoader(final Context context, final boolean omitIntentExtra, final Bundle extras, final long accountId, final long listId, final String listName, final long userId, final String screenName) { super(context); mOmitIntentExtra = omitIntentExtra; mExtras = extras; mAccountId = accountId; mUserId = userId; mListId = listId; mScreenName = screenName; mListName = listName; } @Override public SingleResponse<ParcelableUserList> loadInBackground() { if (!mOmitIntentExtra && mExtras != null) { final ParcelableUserList cache = mExtras.getParcelable(EXTRA_USER_LIST); if (cache != null) return SingleResponse.getInstance(cache); } final Twitter twitter = getTwitterInstance(getContext(), mAccountId, true); if (twitter == null) return SingleResponse.getInstance(); try { final UserList list; if (mListId > 0) { list = twitter.showUserList(mListId); } else if (mUserId > 0) { list = twitter.showUserList(mListName, mUserId); } else if (mScreenName != null) { list = twitter.showUserList(mListName, mScreenName); } else return SingleResponse.getInstance(); return SingleResponse.getInstance(new ParcelableUserList(list, mAccountId)); } catch (final TwitterException e) { return SingleResponse.getInstance(e); } } @Override public void onStartLoading() { forceLoad(); } } }