Java tutorial
/**************************************************************************************** * Copyright (c) 2014 Michael Goldbach <michael@m-goldbach.net> * * * * 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 com.ichi2.anki; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.support.v7.app.AppCompatActivity; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.webkit.WebView; import android.widget.AdapterView; import android.widget.ProgressBar; import android.widget.Spinner; import android.widget.TextView; import com.ichi2.ui.SlidingTabLayout; import com.ichi2.anim.ActivityTransitionAnimation; import com.ichi2.anki.stats.AnkiStatsTaskHandler; import com.ichi2.anki.stats.ChartView; import com.ichi2.anki.widgets.DeckDropDownAdapter; import com.ichi2.libanki.Collection; import com.ichi2.libanki.Stats; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import java.util.Arrays; import java.util.List; import java.util.Locale; import timber.log.Timber; public class Statistics extends NavigationDrawerActivity implements DeckDropDownAdapter.SubtitleListener { public static final int TODAYS_STATS_TAB_POSITION = 0; public static final int FORECAST_TAB_POSITION = 1; public static final int REVIEW_COUNT_TAB_POSITION = 2; public static final int REVIEW_TIME_TAB_POSITION = 3; public static final int INTERVALS_TAB_POSITION = 4; public static final int HOURLY_BREAKDOWN_TAB_POSITION = 5; public static final int WEEKLY_BREAKDOWN_TAB_POSITION = 6; public static final int ANSWER_BUTTONS_TAB_POSITION = 7; public static final int CARDS_TYPES_TAB_POSITION = 8; private Menu mMenu; private SectionsPagerAdapter mSectionsPagerAdapter; private ViewPager mViewPager; private SlidingTabLayout mSlidingTabLayout; private AnkiStatsTaskHandler mTaskHandler = null; private View mMainLayout; private ArrayList<JSONObject> mDropDownDecks; private DeckDropDownAdapter mDropDownAdapter; private Spinner mActionBarSpinner; private boolean mIsWholeCollection = false; private static boolean sIsSubtitle; @Override protected void onCreate(Bundle savedInstanceState) { Timber.d("onCreate()"); sIsSubtitle = true; super.onCreate(savedInstanceState); setContentView(R.layout.activity_anki_stats); mMainLayout = findViewById(android.R.id.content); initNavigationDrawer(mMainLayout); startLoadingCollection(); } @Override protected void onCollectionLoaded(Collection col) { Timber.d("onCollectionLoaded()"); // Add drop-down menu to select deck to action bar. mDropDownDecks = getCol().getDecks().allSorted(); mDropDownAdapter = new DeckDropDownAdapter(this, mDropDownDecks); ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayShowTitleEnabled(false); mActionBarSpinner = (Spinner) findViewById(R.id.toolbar_spinner); mActionBarSpinner.setAdapter(mDropDownAdapter); mActionBarSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { selectDropDownItem(position); } @Override public void onNothingSelected(AdapterView<?> parent) { // do nothing } }); mActionBarSpinner.setVisibility(View.VISIBLE); // Setup Task Handler mTaskHandler = new AnkiStatsTaskHandler(col); // Create the adapter that will return a fragment for each of the three // primary sections of the activity. mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); mViewPager.setOffscreenPageLimit(8); mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs); mSlidingTabLayout.setViewPager(mViewPager); AnkiStatsTaskHandler.createFirstStatisticChooserTask(col, mViewPager); // Dirty way to get text size from a TextView with current style, change if possible float size = new TextView(this).getTextSize(); mTaskHandler.setmStandardTextSize(size); // Prepare options menu only after loading everything supportInvalidateOptionsMenu(); mSectionsPagerAdapter.notifyDataSetChanged(); // set the currently selected deck String currentDeckName; try { currentDeckName = getCol().getDecks().current().getString("name"); } catch (JSONException e) { throw new RuntimeException(e); } if (mIsWholeCollection) { selectDropDownItem(0); } else { for (int dropDownDeckIdx = 0; dropDownDeckIdx < mDropDownDecks.size(); dropDownDeckIdx++) { JSONObject deck = mDropDownDecks.get(dropDownDeckIdx); String deckName; try { deckName = deck.getString("name"); } catch (JSONException e) { throw new RuntimeException(); } if (deckName.equals(currentDeckName)) { selectDropDownItem(dropDownDeckIdx + 1); break; } } } } @Override protected void onResume() { Timber.d("onResume()"); selectNavigationItem(DRAWER_STATISTICS); super.onResume(); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); mMenu = menu; //System.err.println("in onCreateOptionsMenu"); MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.anki_stats, mMenu); return true; } @Override public boolean onPrepareOptionsMenu(Menu menu) { // exit if mTaskHandler not initialized yet if (mTaskHandler == null) { return true; } switch (mTaskHandler.getStatType()) { case Stats.TYPE_MONTH: MenuItem monthItem = menu.findItem(R.id.item_time_month); monthItem.setChecked(true); break; case Stats.TYPE_YEAR: MenuItem yearItem = menu.findItem(R.id.item_time_year); yearItem.setChecked(true); break; case Stats.TYPE_LIFE: MenuItem lifeItem = menu.findItem(R.id.item_time_all); lifeItem.setChecked(true); break; } return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { int itemId = item.getItemId(); switch (itemId) { case R.id.item_time_month: if (item.isChecked()) item.setChecked(false); else item.setChecked(true); if (mTaskHandler.getStatType() != Stats.TYPE_MONTH) { mTaskHandler.setStatType(Stats.TYPE_MONTH); mSectionsPagerAdapter.notifyDataSetChanged(); } return true; case R.id.item_time_year: if (item.isChecked()) item.setChecked(false); else item.setChecked(true); if (mTaskHandler.getStatType() != Stats.TYPE_YEAR) { mTaskHandler.setStatType(Stats.TYPE_YEAR); mSectionsPagerAdapter.notifyDataSetChanged(); } return true; case R.id.item_time_all: if (item.isChecked()) item.setChecked(false); else item.setChecked(true); if (mTaskHandler.getStatType() != Stats.TYPE_LIFE) { mTaskHandler.setStatType(Stats.TYPE_LIFE); mSectionsPagerAdapter.notifyDataSetChanged(); } return true; case R.id.action_time_chooser: //showTimeDialog(); return true; } return super.onOptionsItemSelected(item); } public void selectDropDownItem(int position) { mActionBarSpinner.setSelection(position); if (position == 0) { mIsWholeCollection = true; } else { mIsWholeCollection = false; JSONObject deck = mDropDownDecks.get(position - 1); try { getCol().getDecks().select(deck.getLong("id")); } catch (JSONException e) { Timber.e(e, "Could not get ID from deck"); } } mTaskHandler.setIsWholeCollection(mIsWholeCollection); mSectionsPagerAdapter.notifyDataSetChanged(); } /** * @return text to be used in the subtitle of the drop-down deck selector */ public String getSubtitleText() { return getResources().getString(R.string.statistics); } public AnkiStatsTaskHandler getTaskHandler() { return mTaskHandler; } public ViewPager getViewPager() { return mViewPager; } public SectionsPagerAdapter getSectionsPagerAdapter() { return mSectionsPagerAdapter; } /** * A {@link FragmentPagerAdapter} that returns a fragment corresponding to * one of the sections/tabs/pages. */ public class SectionsPagerAdapter extends FragmentPagerAdapter { public SectionsPagerAdapter(FragmentManager fm) { super(fm); } //this is called when mSectionsPagerAdapter.notifyDataSetChanged() is called, so checkAndUpdate() here //works best for updating all tabs @Override public int getItemPosition(Object object) { if (object instanceof StatisticFragment) { ((StatisticFragment) object).checkAndUpdate(); } //don't return POSITION_NONE, avoid fragment recreation. return super.getItemPosition(object); } @Override public Fragment getItem(int position) { Fragment item = StatisticFragment.newInstance(position); ((StatisticFragment) item).checkAndUpdate(); return item; } @Override public int getCount() { return 9; } @Override public CharSequence getPageTitle(int position) { Locale l = Locale.getDefault(); switch (position) { case TODAYS_STATS_TAB_POSITION: return getString(R.string.stats_today).toUpperCase(l); case FORECAST_TAB_POSITION: return getString(R.string.stats_forecast).toUpperCase(l); case REVIEW_COUNT_TAB_POSITION: return getString(R.string.stats_review_count).toUpperCase(l); case REVIEW_TIME_TAB_POSITION: return getString(R.string.stats_review_time).toUpperCase(l); case INTERVALS_TAB_POSITION: return getString(R.string.stats_review_intervals).toUpperCase(l); case HOURLY_BREAKDOWN_TAB_POSITION: return getString(R.string.stats_breakdown).toUpperCase(l); case WEEKLY_BREAKDOWN_TAB_POSITION: return getString(R.string.stats_weekly_breakdown).toUpperCase(l); case ANSWER_BUTTONS_TAB_POSITION: return getString(R.string.stats_answer_buttons).toUpperCase(l); case CARDS_TYPES_TAB_POSITION: return getString(R.string.stats_cards_types).toUpperCase(l); } return null; } } public static abstract class StatisticFragment extends Fragment { //track current settings for each individual fragment protected long mDeckId; protected ViewPager mActivityPager; protected SectionsPagerAdapter mActivitySectionPagerAdapter; /** * The fragment argument representing the section number for this * fragment. */ protected static final String ARG_SECTION_NUMBER = "section_number"; /** * Returns a new instance of this fragment for the given section * number. */ public static StatisticFragment newInstance(int sectionNumber) { Fragment fragment; Bundle args; switch (sectionNumber) { case FORECAST_TAB_POSITION: case REVIEW_COUNT_TAB_POSITION: case REVIEW_TIME_TAB_POSITION: case INTERVALS_TAB_POSITION: case HOURLY_BREAKDOWN_TAB_POSITION: case WEEKLY_BREAKDOWN_TAB_POSITION: case ANSWER_BUTTONS_TAB_POSITION: case CARDS_TYPES_TAB_POSITION: fragment = new ChartFragment(); args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return (ChartFragment) fragment; case TODAYS_STATS_TAB_POSITION: fragment = new OverviewStatisticsFragment(); args = new Bundle(); args.putInt(ARG_SECTION_NUMBER, sectionNumber); fragment.setArguments(args); return (OverviewStatisticsFragment) fragment; default: return null; } } @Override public void onResume() { super.onResume(); checkAndUpdate(); } public abstract void invalidateView(); public abstract void checkAndUpdate(); } /** * A chart fragment containing a ChartView. */ public static class ChartFragment extends StatisticFragment { private ChartView mChart; private ProgressBar mProgressBar; private int mHeight = 0; private int mWidth = 0; private int mSectionNumber; private int mType = Stats.TYPE_MONTH; private boolean mIsCreated = false; private AsyncTask mCreateChartTask; public ChartFragment() { super(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { setHasOptionsMenu(true); Bundle bundle = getArguments(); mSectionNumber = bundle.getInt(ARG_SECTION_NUMBER); //int sectionNumber = 0; //System.err.println("sectionNumber: " + mSectionNumber); View rootView = inflater.inflate(R.layout.fragment_anki_stats, container, false); mChart = (ChartView) rootView.findViewById(R.id.image_view_chart); if (mChart == null) Timber.d("mChart null!!!"); else Timber.d("mChart is not null!"); //mChart.setLayerType(View.LAYER_TYPE_SOFTWARE, null); mProgressBar = (ProgressBar) rootView.findViewById(R.id.progress_bar_stats); mProgressBar.setVisibility(View.VISIBLE); //mChart.setVisibility(View.GONE); // TODO: Implementing loader for Collection in Fragment itself would be a better solution. if ((((Statistics) getActivity()).getTaskHandler()) == null) { // Close statistics if the TaskHandler hasn't been loaded yet Timber.e("Statistics.ChartFragment.onCreateView() TaskHandler not found"); getActivity().finish(); return rootView; } createChart(); mHeight = mChart.getMeasuredHeight(); mWidth = mChart.getMeasuredWidth(); mChart.addFragment(this); mType = (((Statistics) getActivity()).getTaskHandler()).getStatType(); mIsCreated = true; mActivityPager = ((Statistics) getActivity()).getViewPager(); mActivitySectionPagerAdapter = ((Statistics) getActivity()).getSectionsPagerAdapter(); mDeckId = CollectionHelper.getInstance().getCol(getActivity()).getDecks().selected(); if (!isWholeCollection()) { try { Collection col = CollectionHelper.getInstance().getCol(getActivity()); List<String> parts = Arrays.asList(col.getDecks().current().getString("name").split("::")); if (sIsSubtitle) ((AppCompatActivity) getActivity()).getSupportActionBar() .setSubtitle(parts.get(parts.size() - 1)); else getActivity().setTitle(parts.get(parts.size() - 1)); } catch (JSONException e) { throw new RuntimeException(e); } } else { if (sIsSubtitle) { ((AppCompatActivity) getActivity()).getSupportActionBar() .setSubtitle(R.string.stats_deck_collection); } else { getActivity().setTitle(getResources().getString(R.string.stats_deck_collection)); } } return rootView; } private void createChart() { switch (mSectionNumber) { case FORECAST_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.FORECAST, mChart, mProgressBar); break; case REVIEW_COUNT_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.REVIEW_COUNT, mChart, mProgressBar); break; case REVIEW_TIME_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.REVIEW_TIME, mChart, mProgressBar); break; case INTERVALS_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.INTERVALS, mChart, mProgressBar); break; case HOURLY_BREAKDOWN_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.HOURLY_BREAKDOWN, mChart, mProgressBar); break; case WEEKLY_BREAKDOWN_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.WEEKLY_BREAKDOWN, mChart, mProgressBar); break; case ANSWER_BUTTONS_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.ANSWER_BUTTONS, mChart, mProgressBar); break; case CARDS_TYPES_TAB_POSITION: mCreateChartTask = (((Statistics) getActivity()).getTaskHandler()) .createChart(Stats.ChartType.CARDS_TYPES, mChart, mProgressBar); break; } } @Override public void checkAndUpdate() { //System.err.println("<<<<<<<checkAndUpdate" + mSectionNumber); if (!mIsCreated) return; int height = mChart.getMeasuredHeight(); int width = mChart.getMeasuredWidth(); //are height and width checks still necessary without bitmaps? if (height != 0 && width != 0) { Collection col = CollectionHelper.getInstance().getCol(getActivity()); if (mHeight != height || mWidth != width || mType != (((Statistics) getActivity()).getTaskHandler()).getStatType() || mDeckId != col.getDecks().selected() || isWholeCollection()) { mHeight = height; mWidth = width; mType = (((Statistics) getActivity()).getTaskHandler()).getStatType(); mProgressBar.setVisibility(View.VISIBLE); mChart.setVisibility(View.GONE); mDeckId = col.getDecks().selected(); if (mCreateChartTask != null && !mCreateChartTask.isCancelled()) { mCreateChartTask.cancel(true); } createChart(); } } } private boolean isWholeCollection() { return ((Statistics) getActivity()).mIsWholeCollection; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void invalidateView() { if (mChart != null) mChart.invalidate(); } @Override public void onDestroy() { super.onDestroy(); if (mCreateChartTask != null && !mCreateChartTask.isCancelled()) { mCreateChartTask.cancel(true); } } } public static class OverviewStatisticsFragment extends StatisticFragment { private WebView mWebView; private ProgressBar mProgressBar; private int mType = Stats.TYPE_MONTH; private boolean mIsCreated = false; private AsyncTask mCreateStatisticsOverviewTask; public OverviewStatisticsFragment() { super(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { setHasOptionsMenu(true); View rootView = inflater.inflate(R.layout.fragment_anki_stats_overview, container, false); AnkiStatsTaskHandler handler = (((Statistics) getActivity()).getTaskHandler()); // Workaround for issue 2406 -- crash when resuming after app is purged from RAM // TODO: Implementing loader for Collection in Fragment itself would be a better solution. if (handler == null) { Timber.e("Statistics.OverviewStatisticsFragment.onCreateView() TaskHandler not found"); getActivity().finish(); return rootView; } mWebView = (WebView) rootView.findViewById(R.id.web_view_stats); if (mWebView == null) Timber.d("mChart null!!!"); else Timber.d("mChart is not null!"); //mChart.setLayerType(View.LAYER_TYPE_SOFTWARE, null); mProgressBar = (ProgressBar) rootView.findViewById(R.id.progress_bar_stats_overview); mProgressBar.setVisibility(View.VISIBLE); //mChart.setVisibility(View.GONE); createStatisticOverview(); mType = handler.getStatType(); mIsCreated = true; mActivityPager = ((Statistics) getActivity()).getViewPager(); mActivitySectionPagerAdapter = ((Statistics) getActivity()).getSectionsPagerAdapter(); Collection col = CollectionHelper.getInstance().getCol(getActivity()); if (!isWholeCollection()) { mDeckId = col.getDecks().selected(); try { List<String> parts = Arrays.asList(col.getDecks().current().getString("name").split("::")); if (sIsSubtitle) { ((AppCompatActivity) getActivity()).getSupportActionBar() .setSubtitle(parts.get(parts.size() - 1)); } else { getActivity().setTitle(parts.get(parts.size() - 1)); } } catch (JSONException e) { throw new RuntimeException(e); } } else { if (sIsSubtitle) { ((AppCompatActivity) getActivity()).getSupportActionBar() .setSubtitle(R.string.stats_deck_collection); } else { getActivity().setTitle(R.string.stats_deck_collection); } } return rootView; } private boolean isWholeCollection() { return ((Statistics) getActivity()).mIsWholeCollection; } private void createStatisticOverview() { AnkiStatsTaskHandler handler = (((Statistics) getActivity()).getTaskHandler()); mCreateStatisticsOverviewTask = handler.createStatisticsOverview(mWebView, mProgressBar); } @Override public void invalidateView() { if (mWebView != null) mWebView.invalidate(); } @Override public void checkAndUpdate() { if (!mIsCreated) { return; } Collection col = CollectionHelper.getInstance().getCol(getActivity()); if (mType != (((Statistics) getActivity()).getTaskHandler()).getStatType() || mDeckId != col.getDecks().selected() || isWholeCollection()) { mType = (((Statistics) getActivity()).getTaskHandler()).getStatType(); mProgressBar.setVisibility(View.VISIBLE); mWebView.setVisibility(View.GONE); mDeckId = col.getDecks().selected(); if (mCreateStatisticsOverviewTask != null && !mCreateStatisticsOverviewTask.isCancelled()) { mCreateStatisticsOverviewTask.cancel(true); } createStatisticOverview(); } } @Override public void onDestroy() { super.onDestroy(); if (mCreateStatisticsOverviewTask != null && !mCreateStatisticsOverviewTask.isCancelled()) { mCreateStatisticsOverviewTask.cancel(true); } } } @Override public void onBackPressed() { if (isDrawerOpen()) { super.onBackPressed(); } else { Timber.i("Back key pressed"); Intent data = new Intent(); if (getIntent().hasExtra("selectedDeck")) { data.putExtra("originalDeck", getIntent().getLongExtra("selectedDeck", 0L)); } setResult(RESULT_CANCELED, data); finishWithAnimation(ActivityTransitionAnimation.RIGHT); } } }