Java tutorial
/* * Licensed to UbiCollab.org under one or more contributor * license agreements. See the NOTICE file distributed * with this work for additional information regarding * copyright ownership. UbiCollab.org licenses this file * to you 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 com.sintef_energy.ubisolar.fragments; import android.app.Fragment; import android.app.FragmentManager; import android.app.LoaderManager; import android.content.CursorLoader; import android.content.Intent; import android.content.Loader; import android.database.Cursor; import android.os.Bundle; import android.support.v13.app.FragmentStatePagerAdapter; import android.support.v4.content.LocalBroadcastManager; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import com.astuetz.PagerSlidingTabStrip; import com.facebook.Session; import com.sintef_energy.ubisolar.Interfaces.IUsageView; import com.sintef_energy.ubisolar.R; import com.sintef_energy.ubisolar.database.energy.DeviceModel; import com.sintef_energy.ubisolar.database.energy.EnergyContract; import com.sintef_energy.ubisolar.dialogs.SelectDevicesDialog; import com.sintef_energy.ubisolar.dialogs.ShareDialog; import com.sintef_energy.ubisolar.fragments.graphs.UsageGraphLineFragment; import com.sintef_energy.ubisolar.fragments.graphs.UsageGraphPieFragment; import com.sintef_energy.ubisolar.model.DeviceUsageList; import com.sintef_energy.ubisolar.preferences.PreferencesManager; import com.sintef_energy.ubisolar.utils.Global; import com.sintef_energy.ubisolar.utils.ScrollViewPager; import java.util.ArrayList; import java.util.HashMap; import java.util.LinkedHashMap; /** * The partent fragment managing the line and pie graph fragments */ public class UsageFragment extends DefaultTabFragment implements LoaderManager.LoaderCallbacks<Cursor> { private static final int LOADER_DEVICES = 0; private static final String TAG = UsageFragment.class.getName(); private View mRootView; private Bundle mSavedState; private LinkedHashMap<Long, DeviceModel> mDevices; private ArrayList<DeviceUsageList> mDeviceUsageList; private IUsageView mGraphView; private UsageFragmentStatePageAdapter mUsageFragmentStatePageAdapter; private PreferencesManager mPreferenceManager; private ScrollViewPager mPager; /** * Returns a new instance of this fragment for the given section * number. */ public static UsageFragment newInstance(int sectionNumber) { UsageFragment fragment = new UsageFragment(); Bundle args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return fragment; } @Override public void onCreate(Bundle bundle) { super.onCreate(bundle); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { mRootView = inflater.inflate(R.layout.fragment_usage, container, false); mPager = (ScrollViewPager) mRootView.findViewById(R.id.fragment_usage_tabs_pager); if (mUsageFragmentStatePageAdapter == null) mUsageFragmentStatePageAdapter = new UsageFragmentStatePageAdapter(this, mPager); mPreferenceManager = PreferencesManager.getInstance(); // Initialize the ViewPager and set the adapter mPager.setAdapter(mUsageFragmentStatePageAdapter); // Makes the tabs non-swipeable. Having the tabs swipeable causes weird behavior because the mPager.setSwipeable(false); // Bind the tabs to the ViewPager PagerSlidingTabStrip tabs = (PagerSlidingTabStrip) mRootView.findViewById(R.id.fragment_usage_tabs); tabs.setViewPager(mPager); tabs.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { mGraphView = (IUsageView) mUsageFragmentStatePageAdapter.getFragment(position); mGraphView.setDevices(mDevices); mGraphView.pullData(); } @Override public void onPageScrollStateChanged(int state) { } }); mGraphView = (IUsageView) mUsageFragmentStatePageAdapter.instantiateItem(mPager, 0); return mRootView; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); mDevices = new LinkedHashMap<>(); if (savedInstanceState != null && mSavedState == null) mSavedState = savedInstanceState.getBundle("mSavedState"); LoaderManager loaderManager = getLoaderManager(); //Get devices if (mSavedState != null) { mDeviceUsageList = mSavedState.getParcelableArrayList("mDeviceUsageList"); loaderManager.restartLoader(LOADER_DEVICES, null, this); } else { mDeviceUsageList = new ArrayList<>(); loaderManager.initLoader(LOADER_DEVICES, null, this); } mPreferenceManager.setNavDrawerUsage(0); Intent i = new Intent(Global.BROADCAST_NAV_DRAWER); i.putExtra(Global.DATA_B_NAV_DRAWER_USAGE, 0); LocalBroadcastManager.getInstance(this.getActivity().getApplicationContext()).sendBroadcast(i); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); inflater.inflate(R.menu.usage, menu); if (!Session.getActiveSession().isOpened()) { MenuItem item = menu.findItem(R.id.share_usage); item.setVisible(false); } } @Override public boolean onOptionsItemSelected(MenuItem item) { FragmentManager fragmentManager = getFragmentManager(); if (fragmentManager == null) { Log.e(TAG, "Unable to load the fragment manager"); return false; } switch (item.getItemId()) { case R.id.fragment_usage_menu_action_devices: SelectDevicesDialog dialog = SelectDevicesDialog.newInstance(new ArrayList<>(mDevices.values()), mGraphView.getSelectedDialogItems()); dialog.setTargetFragment(this, 0); dialog.show(fragmentManager, "selectDeviceDialog"); return true; case R.id.share_usage: ShareDialog d = new ShareDialog(mGraphView.createImage()); d.setTargetFragment(UsageFragment.this, 0); d.show(fragmentManager, "shareDialog"); return true; default: return super.onOptionsItemSelected(item); } } /*End lifecycle*/ @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putBundle("mSavedState", mSavedState != null ? mSavedState : saveState()); } public void onDestroyView() { super.onDestroy(); mSavedState = saveState(); } @Override public void onDestroy() { super.onDestroy(); cleanUpReferences(); } private Bundle saveState() { Bundle state = new Bundle(); state.putParcelableArrayList("mDeviceUsageList", mDeviceUsageList); return state; } /** * Clear all objects and references. */ private void cleanUpReferences() { mRootView = null; mSavedState = null; mDevices = null; mDeviceUsageList = null; mGraphView = null; mUsageFragmentStatePageAdapter = null; mPreferenceManager = null; mPager = null; } /** * Selected items is returned from the device selection dialog * @param itemsSelected */ public void selectedDevicesCallback(boolean[] itemsSelected) { mGraphView.setSelectedDialogItems(itemsSelected); mGraphView.pullData(); } @Override public Loader<Cursor> onCreateLoader(int mode, Bundle bundle) { return new CursorLoader(getActivity(), EnergyContract.Devices.CONTENT_URI, EnergyContract.Devices.PROJECTION_ALL, null, null, DeviceModel.DeviceEntry._ID + " ASC"); } @Override public void onLoadFinished(Loader<Cursor> cursorLoader, Cursor cursor) { mDevices.clear(); cursor.moveToFirst(); if (cursor.getCount() != 0) do { DeviceModel model = new DeviceModel(cursor); mDevices.put(model.getId(), model); } while (cursor.moveToNext()); mGraphView.setDevices(mDevices); mGraphView.pullData(); } @Override public void onLoaderReset(Loader<Cursor> cursorLoader) { } /** * Adapter for fragment swapping */ private static class UsageFragmentStatePageAdapter extends FragmentStatePagerAdapter { private String titles[]; private HashMap<Integer, Fragment> fragmentReferenceMap; public UsageFragmentStatePageAdapter(Fragment fragment, ScrollViewPager pager) { super(fragment.getFragmentManager()); titles = fragment.getResources().getStringArray(R.array.fragment_usage_tabs); fragmentReferenceMap = new HashMap<>(); } @Override public CharSequence getPageTitle(int position) { return titles[position]; } @Override public Fragment getItem(int position) { Fragment fragment; switch (position) { case 0: fragment = UsageGraphLineFragment.newInstance(); break; case 1: fragment = UsageGraphPieFragment.newInstance(); break; default: return null; } if (fragment != null) { fragmentReferenceMap.put(position, fragment); } return fragment; } @Override public int getCount() { return titles.length; } @Override public void destroyItem(ViewGroup container, int position, Object object) { super.destroyItem(container, position, object); fragmentReferenceMap.remove(position); } public Fragment getFragment(int key) { return fragmentReferenceMap.get(key); } } //Unfinished code for multifinger swiping private static class GraphViewTouchListener implements View.OnTouchListener { ScrollViewPager pager; GraphViewTouchListener(ScrollViewPager pager) { this.pager = pager; } @Override public boolean onTouch(View view, MotionEvent motionEvent) { //We have a multitouch event if (motionEvent.getPointerCount() > 1) { pager.setSwipeable(false); //requestDisallowInterceptTouchEvent ? return true; } pager.setSwipeable(true); return false; } } }