Java tutorial
/* * Copyright 2012 Google Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ua.org.gdg.devfest.iosched.ui.tablet; import android.annotation.TargetApi; import android.app.SearchManager; import android.content.Intent; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.widget.SlidingPaneLayout; import android.support.v7.app.ActionBar; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.SearchView; import android.widget.SpinnerAdapter; import android.widget.TextView; import ua.org.gdg.devfest.iosched.R; import ua.org.gdg.devfest.iosched.provider.ScheduleContract; import ua.org.gdg.devfest.iosched.ui.*; import ua.org.gdg.devfest.iosched.util.BeamUtils; import ua.org.gdg.devfest.iosched.util.ImageLoader; import ua.org.gdg.devfest.iosched.util.UIUtils; import static ua.org.gdg.devfest.iosched.util.LogUtils.LOGD; /** * A multi-pane activity, consisting of a {@link TracksDropdownFragment}, a * {@link SessionsFragment} or {@link ua.org.gdg.devfest.iosched.ui.SandboxFragment}, and {@link SessionDetailFragment} or * {@link ua.org.gdg.devfest.iosched.ui.SandboxDetailFragment}. * * This activity requires API level 11 or greater. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB) public class SessionsSandboxMultiPaneActivity extends BaseActivity implements ActionBar.OnNavigationListener, SessionsFragment.Callbacks, SandboxFragment.Callbacks, SandboxDetailFragment.Callbacks, TracksDropdownFragment.Callbacks, TrackInfoHelperFragment.Callbacks, ImageLoader.ImageLoaderProvider { public static final String EXTRA_MASTER_URI = "ua.org.gdg.devfest.iosched.extra.MASTER_URI"; public static final String EXTRA_DEFAULT_VIEW_TYPE = "ua.org.gdg.devfest.iosched.extra.DEFAULT_VIEW_TYPE"; private static final String STATE_VIEW_TYPE = "view_type"; private TracksDropdownFragment mTracksDropdownFragment; private Fragment mDetailFragment; private boolean mFullUI = false; private SlidingPaneLayout mSlidingPaneLayout; private int mViewType; private boolean mInitialTabSelect = true; private ImageLoader mImageLoader; @Override protected void onCreate(Bundle savedInstanceState) { UIUtils.tryTranslateHttpIntent(this); BeamUtils.tryUpdateIntentFromBeam(this); super.onCreate(savedInstanceState); setContentView(R.layout.activity_sessions_sandbox); final FragmentManager fm = getSupportFragmentManager(); mTracksDropdownFragment = (TracksDropdownFragment) fm.findFragmentById(R.id.fragment_tracks_dropdown); mSlidingPaneLayout = (SlidingPaneLayout) findViewById(R.id.sliding_pane_layout); // Offset the left pane by its full width and left margin when collapsed // (ViewPager-like presentation) mSlidingPaneLayout.setParallaxDistance(getResources().getDimensionPixelSize(R.dimen.sliding_pane_width) + getResources().getDimensionPixelSize(R.dimen.multipane_padding)); mSlidingPaneLayout.setSliderFadeColor(getResources().getColor(R.color.sliding_pane_content_fade)); routeIntent(getIntent(), savedInstanceState != null); if (savedInstanceState != null) { if (mFullUI) { int viewType = savedInstanceState.getInt(STATE_VIEW_TYPE); getSupportActionBar().setSelectedNavigationItem(viewType); } mDetailFragment = fm.findFragmentById(R.id.fragment_container_detail); updateDetailBackground(); } // This flag prevents onTabSelected from triggering extra master pane reloads // unless it's actually being triggered by the user (and not automatically by // the system) mInitialTabSelect = false; mImageLoader = new ImageLoader(this, R.drawable.person_image_empty) .setMaxImageSize(getResources().getDimensionPixelSize(R.dimen.speaker_image_size)) .setFadeInImage(UIUtils.hasHoneycombMR1()); } private void routeIntent(Intent intent, boolean updateSurfaceOnly) { Uri uri = intent.getData(); if (uri == null) { return; } if (intent.hasExtra(Intent.EXTRA_TITLE)) { setTitle(intent.getStringExtra(Intent.EXTRA_TITLE)); } String mimeType = getContentResolver().getType(uri); if (ScheduleContract.Tracks.CONTENT_ITEM_TYPE.equals(mimeType)) { // Load track details showFullUI(true); if (!updateSurfaceOnly) { // TODO: don't assume the URI will contain the track ID int defaultViewType = intent.getIntExtra(EXTRA_DEFAULT_VIEW_TYPE, TracksDropdownFragment.VIEW_TYPE_SESSIONS); String selectedTrackId = ScheduleContract.Tracks.getTrackId(uri); loadTrackList(defaultViewType, selectedTrackId); getSupportActionBar().setSelectedNavigationItem(defaultViewType); onTrackSelected(selectedTrackId); mSlidingPaneLayout.openPane(); } } else if (ScheduleContract.Sessions.CONTENT_TYPE.equals(mimeType)) { // Load a session list, hiding the tracks dropdown and the tabs mViewType = TracksDropdownFragment.VIEW_TYPE_SESSIONS; showFullUI(false); if (!updateSurfaceOnly) { loadSessionList(uri, null); mSlidingPaneLayout.openPane(); } } else if (ScheduleContract.Sessions.CONTENT_ITEM_TYPE.equals(mimeType)) { // Load session details if (intent.hasExtra(EXTRA_MASTER_URI)) { mViewType = TracksDropdownFragment.VIEW_TYPE_SESSIONS; showFullUI(false); if (!updateSurfaceOnly) { loadSessionList((Uri) intent.getParcelableExtra(EXTRA_MASTER_URI), ScheduleContract.Sessions.getSessionId(uri)); loadSessionDetail(uri); } } else { mViewType = TracksDropdownFragment.VIEW_TYPE_SESSIONS; // prepare for onTrackInfo... showFullUI(true); if (!updateSurfaceOnly) { loadSessionDetail(uri); loadTrackInfoFromSessionUri(uri); } } } else if (ScheduleContract.Sandbox.CONTENT_TYPE.equals(mimeType)) { // Load a sandbox company list mViewType = TracksDropdownFragment.VIEW_TYPE_SANDBOX; showFullUI(false); if (!updateSurfaceOnly) { loadSandboxList(uri, null); mSlidingPaneLayout.openPane(); } } else if (ScheduleContract.Sandbox.CONTENT_ITEM_TYPE.equals(mimeType)) { // Load company details mViewType = TracksDropdownFragment.VIEW_TYPE_SANDBOX; showFullUI(false); if (!updateSurfaceOnly) { Uri masterUri = intent.getParcelableExtra(EXTRA_MASTER_URI); if (masterUri == null) { masterUri = ScheduleContract.Sandbox.CONTENT_URI; } loadSandboxList(masterUri, ScheduleContract.Sandbox.getCompanyId(uri)); loadSandboxDetail(uri); } } updateDetailBackground(); } private void showFullUI(boolean fullUI) { mFullUI = fullUI; final ActionBar actionBar = getSupportActionBar(); final FragmentManager fm = getSupportFragmentManager(); if (fullUI) { actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST); actionBar.setDisplayShowTitleEnabled(false); actionBar.setListNavigationCallbacks(mActionBarSpinnerAdapter, this); fm.beginTransaction().show(fm.findFragmentById(R.id.fragment_tracks_dropdown)).commit(); } else { actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); fm.beginTransaction().hide(fm.findFragmentById(R.id.fragment_tracks_dropdown)).commit(); } } private SpinnerAdapter mActionBarSpinnerAdapter = new BaseAdapter() { @Override public int getCount() { return 3; } @Override public Object getItem(int position) { return position; } @Override public long getItemId(int position) { return position + 1; } private int getLabelResId(int position) { switch (position) { case TracksDropdownFragment.VIEW_TYPE_SESSIONS: return R.string.title_sessions; case TracksDropdownFragment.VIEW_TYPE_OFFICE_HOURS: return R.string.title_office_hours; case TracksDropdownFragment.VIEW_TYPE_SANDBOX: return R.string.title_sandbox; } return 0; } @Override public View getView(int position, View convertView, ViewGroup container) { if (convertView == null) { convertView = getLayoutInflater().inflate(android.R.layout.simple_spinner_item, container, false); } ((TextView) convertView.findViewById(android.R.id.text1)).setText(getLabelResId(position)); return convertView; } @Override public View getDropDownView(int position, View convertView, ViewGroup container) { if (convertView == null) { convertView = getLayoutInflater().inflate(android.R.layout.simple_spinner_dropdown_item, container, false); } ((TextView) convertView.findViewById(android.R.id.text1)).setText(getLabelResId(position)); return convertView; } }; @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.search, menu); MenuItem searchItem = menu.findItem(R.id.menu_search); if (searchItem != null && UIUtils.hasHoneycomb()) { SearchView searchView = (SearchView) searchItem.getActionView(); if (searchView != null) { SearchManager searchManager = (SearchManager) getSystemService(SEARCH_SERVICE); searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName())); searchView.setQueryRefinementEnabled(true); } } return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: if (mSlidingPaneLayout.isSlideable() && !mSlidingPaneLayout.isOpen()) { // If showing the detail view, pressing Up should show the master pane. mSlidingPaneLayout.openPane(); return true; } break; case R.id.menu_search: if (!UIUtils.hasHoneycomb()) { startSearch(null, false, Bundle.EMPTY, false); return true; } break; } return super.onOptionsItemSelected(item); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putInt(STATE_VIEW_TYPE, mViewType); } @Override public boolean onNavigationItemSelected(int itemPosition, long itemId) { loadTrackList(itemPosition); // itemPosition == view type if (!mInitialTabSelect) { onTrackSelected(mTracksDropdownFragment.getSelectedTrackId()); mSlidingPaneLayout.openPane(); } return true; } private void loadTrackList(int viewType) { loadTrackList(viewType, null); } private void loadTrackList(int viewType, String selectTrackId) { if (mDetailFragment != null && mViewType != viewType) { getSupportFragmentManager().beginTransaction().remove(mDetailFragment).commit(); mDetailFragment = null; } mViewType = viewType; if (selectTrackId != null) { mTracksDropdownFragment.loadTrackList(viewType, selectTrackId); } else { mTracksDropdownFragment.loadTrackList(viewType); } updateDetailBackground(); } private void updateDetailBackground() { if (mDetailFragment == null) { if (TracksDropdownFragment.VIEW_TYPE_SESSIONS == mViewType || TracksDropdownFragment.VIEW_TYPE_OFFICE_HOURS == mViewType) { findViewById(R.id.fragment_container_detail) .setBackgroundResource(R.drawable.grey_frame_on_white_empty_sessions); } else { findViewById(R.id.fragment_container_detail) .setBackgroundResource(R.drawable.grey_frame_on_white_empty_sandbox); } } else { findViewById(R.id.fragment_container_detail).setBackgroundResource(R.drawable.grey_frame_on_white); } } private void loadSessionList(Uri sessionsUri, String selectSessionId) { SessionsFragment fragment = new SessionsFragment(); fragment.setSelectedSessionId(selectSessionId); fragment.setArguments(BaseActivity.intentToFragmentArguments(new Intent(Intent.ACTION_VIEW, sessionsUri))); getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_master, fragment).commit(); } private void loadSessionDetail(Uri sessionUri) { BeamUtils.setBeamSessionUri(this, sessionUri); SessionDetailFragment fragment = new SessionDetailFragment(); fragment.setArguments(BaseActivity.intentToFragmentArguments(new Intent(Intent.ACTION_VIEW, sessionUri))); getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_detail, fragment).commit(); mDetailFragment = fragment; updateDetailBackground(); // If loading session details in portrait, hide the master pane mSlidingPaneLayout.closePane(); } private void loadSandboxList(Uri sandboxUri, String selectCompanyId) { SandboxFragment fragment = new SandboxFragment(); fragment.setSelectedCompanyId(selectCompanyId); fragment.setArguments(BaseActivity.intentToFragmentArguments(new Intent(Intent.ACTION_VIEW, sandboxUri))); getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_master, fragment).commit(); } private void loadSandboxDetail(Uri companyUri) { SandboxDetailFragment fragment = new SandboxDetailFragment(); fragment.setArguments(BaseActivity.intentToFragmentArguments(new Intent(Intent.ACTION_VIEW, companyUri))); getSupportFragmentManager().beginTransaction().replace(R.id.fragment_container_detail, fragment).commit(); mDetailFragment = fragment; updateDetailBackground(); // If loading session details in portrait, hide the master pane mSlidingPaneLayout.closePane(); } @Override public void onTrackNameAvailable(String trackId, String trackName) { String trackType = null; switch (mViewType) { case TracksDropdownFragment.VIEW_TYPE_SESSIONS: trackType = getString(R.string.title_sessions); break; case TracksDropdownFragment.VIEW_TYPE_OFFICE_HOURS: trackType = getString(R.string.title_office_hours); break; case TracksDropdownFragment.VIEW_TYPE_SANDBOX: trackType = getString(R.string.title_sandbox); break; } LOGD("Tracker", trackType + ": " + mTracksDropdownFragment.getTrackName()); } @Override public void onTrackSelected(String trackId) { boolean allTracks = (ScheduleContract.Tracks.ALL_TRACK_ID.equals(trackId)); switch (mViewType) { case TracksDropdownFragment.VIEW_TYPE_SESSIONS: loadSessionList((allTracks ? ScheduleContract.Sessions.CONTENT_URI : ScheduleContract.Tracks.buildSessionsUri(trackId)) .buildUpon() .appendQueryParameter(ScheduleContract.Sessions.QUERY_PARAMETER_FILTER, ScheduleContract.Sessions.QUERY_VALUE_FILTER_SESSIONS_CODELABS_ONLY) .build(), null); break; case TracksDropdownFragment.VIEW_TYPE_OFFICE_HOURS: loadSessionList( (allTracks ? ScheduleContract.Sessions.CONTENT_URI : ScheduleContract.Tracks.buildSessionsUri(trackId)) .buildUpon() .appendQueryParameter(ScheduleContract.Sessions.QUERY_PARAMETER_FILTER, ScheduleContract.Sessions.QUERY_VALUE_FILTER_OFFICE_HOURS_ONLY) .build(), null); break; case TracksDropdownFragment.VIEW_TYPE_SANDBOX: loadSandboxList(allTracks ? ScheduleContract.Sandbox.CONTENT_URI : ScheduleContract.Tracks.buildSandboxUri(trackId), null); break; } } @Override public boolean onSessionSelected(String sessionId) { loadSessionDetail(ScheduleContract.Sessions.buildSessionUri(sessionId)); return true; } @Override public boolean onCompanySelected(String companyId) { loadSandboxDetail(ScheduleContract.Sandbox.buildCompanyUri(companyId)); return true; } private TrackInfoHelperFragment mTrackInfoHelperFragment; private String mTrackInfoLoadCookie; private void loadTrackInfoFromSessionUri(Uri sessionUri) { mTrackInfoLoadCookie = ScheduleContract.Sessions.getSessionId(sessionUri); Uri trackDirUri = ScheduleContract.Sessions .buildTracksDirUri(ScheduleContract.Sessions.getSessionId(sessionUri)); android.support.v4.app.FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); if (mTrackInfoHelperFragment != null) { ft.remove(mTrackInfoHelperFragment); } mTrackInfoHelperFragment = TrackInfoHelperFragment.newFromTrackUri(trackDirUri); ft.add(mTrackInfoHelperFragment, "track_info").commit(); } @Override public void onTrackInfoAvailable(String trackId, TrackInfo track) { loadTrackList(mViewType, trackId); boolean allTracks = (ScheduleContract.Tracks.ALL_TRACK_ID.equals(trackId)); switch (mViewType) { case TracksDropdownFragment.VIEW_TYPE_SESSIONS: loadSessionList((allTracks ? ScheduleContract.Sessions.CONTENT_URI : ScheduleContract.Tracks.buildSessionsUri(trackId)) .buildUpon() .appendQueryParameter(ScheduleContract.Sessions.QUERY_PARAMETER_FILTER, ScheduleContract.Sessions.QUERY_VALUE_FILTER_SESSIONS_CODELABS_ONLY) .build(), mTrackInfoLoadCookie); break; case TracksDropdownFragment.VIEW_TYPE_OFFICE_HOURS: loadSessionList( (allTracks ? ScheduleContract.Sessions.CONTENT_URI : ScheduleContract.Tracks.buildSessionsUri(trackId)) .buildUpon() .appendQueryParameter(ScheduleContract.Sessions.QUERY_PARAMETER_FILTER, ScheduleContract.Sessions.QUERY_VALUE_FILTER_OFFICE_HOURS_ONLY) .build(), mTrackInfoLoadCookie); break; case TracksDropdownFragment.VIEW_TYPE_SANDBOX: loadSandboxList(allTracks ? ScheduleContract.Sandbox.CONTENT_URI : ScheduleContract.Tracks.buildSandboxUri(trackId), mTrackInfoLoadCookie); break; } } @Override public void onTrackIdAvailable(String trackId) { } @Override public ImageLoader getImageLoaderInstance() { return mImageLoader; } }