app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java

   1 /*
   2  * Copyright © 2020 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui.activity;
  19
  20 import android.content.Intent;
  21 import android.content.SharedPreferences;
  22 import android.content.pm.PackageInfo;
  23 import android.content.pm.ShortcutInfo;
  24 import android.content.pm.ShortcutManager;
  25 import android.content.res.ColorStateList;
  26 import android.graphics.Color;
  27 import android.graphics.drawable.Icon;
  28 import android.os.AsyncTask;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.util.Log;
  32 import android.view.View;
  33 import android.view.ViewGroup;
  34 import android.view.animation.AnimationUtils;
  35 import android.widget.LinearLayout;
  36 import android.widget.ProgressBar;
  37 import android.widget.TextView;
  38
  39 import androidx.annotation.NonNull;
  40 import androidx.appcompat.app.ActionBarDrawerToggle;
  41 import androidx.appcompat.widget.Toolbar;
  42 import androidx.core.view.GravityCompat;
  43 import androidx.drawerlayout.widget.DrawerLayout;
  44 import androidx.fragment.app.Fragment;
  45 import androidx.fragment.app.FragmentManager;
  46 import androidx.fragment.app.FragmentPagerAdapter;
  47 import androidx.recyclerview.widget.LinearLayoutManager;
  48 import androidx.recyclerview.widget.RecyclerView;
  49 import androidx.viewpager.widget.ViewPager;
  50
  51 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  52 import com.google.android.material.snackbar.Snackbar;
  53
  54 import net.ktnx.mobileledger.R;
  55 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  56 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  57 import net.ktnx.mobileledger.model.Data;
  58 import net.ktnx.mobileledger.model.LedgerAccount;
  59 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  60 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  61 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  62 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  63 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  64 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  65 import net.ktnx.mobileledger.utils.Colors;
  66 import net.ktnx.mobileledger.utils.GetOptCallback;
  67 import net.ktnx.mobileledger.utils.Logger;
  68 import net.ktnx.mobileledger.utils.MLDB;
  69
  70 import org.jetbrains.annotations.NotNull;
  71
  72 import java.text.DateFormat;
  73 import java.util.ArrayList;
  74 import java.util.Date;
  75 import java.util.List;
  76 import java.util.Locale;
  77
  78 import static net.ktnx.mobileledger.utils.Logger.debug;
  79
  80 /*
  81  * TODO: reports
  82  *  */
  83
  84 public class MainActivity extends ProfileThemedActivity {
  85     public static final String STATE_CURRENT_PAGE = "current_page";
  86     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  87     public static final String STATE_ACC_FILTER = "account_filter";
  88     private static final String PREF_THEME_ID = "themeId";
  89     DrawerLayout drawer;
  90     private View profileListHeadMore, profileListHeadCancel, profileListHeadAddProfile;
  91     private View bTransactionListCancelDownload;
  92     private SectionsPagerAdapter mSectionsPagerAdapter;
  93     private ViewPager mViewPager;
  94     private FloatingActionButton fab;
  95     private ProfilesRecyclerViewAdapter mProfileListAdapter;
  96     private int mCurrentPage;
  97     private boolean mBackMeansToAccountList = false;
  98     private Toolbar mToolbar;
  99     private DrawerLayout.SimpleDrawerListener drawerListener;
 100     private ActionBarDrawerToggle barDrawerToggle;
 101     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 102     private MobileLedgerProfile profile;
 103     @Override
 104     protected void onStart() {
 105         super.onStart();
 106
 107         Logger.debug("MainActivity", "onStart()");
 108
 109         mViewPager.setCurrentItem(mCurrentPage, false);
 110     }
 111     @Override
 112     protected void onSaveInstanceState(@NotNull Bundle outState) {
 113         super.onSaveInstanceState(outState);
 114         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 115         if (Data.accountFilter.getValue() != null)
 116             outState.putString(STATE_ACC_FILTER, Data.accountFilter.getValue());
 117     }
 118     @Override
 119     protected void onDestroy() {
 120         mSectionsPagerAdapter = null;
 121         RecyclerView root = findViewById(R.id.nav_profile_list);
 122         if (root != null)
 123             root.setAdapter(null);
 124         if (drawer != null)
 125             drawer.removeDrawerListener(drawerListener);
 126         drawerListener = null;
 127         if (drawer != null)
 128             drawer.removeDrawerListener(barDrawerToggle);
 129         barDrawerToggle = null;
 130         if (mViewPager != null)
 131             mViewPager.removeOnPageChangeListener(pageChangeListener);
 132         pageChangeListener = null;
 133         super.onDestroy();
 134     }
 135     @Override
 136     protected void setupProfileColors() {
 137         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 138         int profileColor = prefs.getInt(PREF_THEME_ID, -2);
 139         if (profileColor == -2)
 140             profileColor = Data.retrieveCurrentThemeIdFromDb();
 141         Colors.setupTheme(this, profileColor);
 142         Colors.profileThemeId = profileColor;
 143         storeThemeIdInPrefs(profileColor);
 144     }
 145     @Override
 146     protected void onResume() {
 147         super.onResume();
 148         fabShouldShow();
 149     }
 150     @Override
 151     protected void onCreate(Bundle savedInstanceState) {
 152         debug("MainActivity", "onCreate()/entry");
 153         super.onCreate(savedInstanceState);
 154         debug("MainActivity", "onCreate()/after super");
 155         setContentView(R.layout.activity_main);
 156
 157         fab = findViewById(R.id.btn_add_transaction);
 158         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 159         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 160         LinearLayout profileListHeadMoreAndCancel =
 161                 findViewById(R.id.nav_profile_list_head_buttons);
 162         profileListHeadAddProfile = findViewById(R.id.nav_new_profile_button);
 163         drawer = findViewById(R.id.drawer_layout);
 164         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 165         mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
 166         mViewPager = findViewById(R.id.root_frame);
 167
 168         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 169         if (extra != null && savedInstanceState == null)
 170             savedInstanceState = extra;
 171
 172
 173         mToolbar = findViewById(R.id.toolbar);
 174         setSupportActionBar(mToolbar);
 175
 176         Data.profile.observe(this, this::onProfileChanged);
 177
 178         Data.profiles.observe(this, this::onProfileListChanged);
 179
 180         if (barDrawerToggle == null) {
 181             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 182                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 183             drawer.addDrawerListener(barDrawerToggle);
 184         }
 185         barDrawerToggle.syncState();
 186
 187         try {
 188             PackageInfo pi = getApplicationContext().getPackageManager()
 189                                                     .getPackageInfo(getPackageName(), 0);
 190             ((TextView) findViewById(R.id.nav_upper).findViewById(
 191                     R.id.drawer_version_text)).setText(pi.versionName);
 192             ((TextView) findViewById(R.id.no_profiles_layout).findViewById(
 193                     R.id.drawer_version_text)).setText(pi.versionName);
 194         }
 195         catch (Exception e) {
 196             e.printStackTrace();
 197         }
 198
 199         markDrawerItemCurrent(R.id.nav_account_summary);
 200
 201         mViewPager.setAdapter(mSectionsPagerAdapter);
 202
 203         if (pageChangeListener == null) {
 204             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 205                 @Override
 206                 public void onPageSelected(int position) {
 207                     mCurrentPage = position;
 208                     switch (position) {
 209                         case 0:
 210                             markDrawerItemCurrent(R.id.nav_account_summary);
 211                             break;
 212                         case 1:
 213                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 214                             break;
 215                         default:
 216                             Log.e("MainActivity",
 217                                     String.format("Unexpected page index %d", position));
 218                     }
 219
 220                     super.onPageSelected(position);
 221                 }
 222             };
 223             mViewPager.addOnPageChangeListener(pageChangeListener);
 224         }
 225
 226         mCurrentPage = 0;
 227         if (savedInstanceState != null) {
 228             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 229             if (currentPage != -1) {
 230                 mCurrentPage = currentPage;
 231             }
 232             Data.accountFilter.setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
 233         }
 234
 235         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 236
 237         findViewById(R.id.btn_no_profiles_add).setOnClickListener(
 238                 v -> startEditProfileActivity(null));
 239
 240         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 241
 242         findViewById(R.id.nav_new_profile_button).setOnClickListener(
 243                 v -> startEditProfileActivity(null));
 244
 245         RecyclerView root = findViewById(R.id.nav_profile_list);
 246         if (root == null)
 247             throw new RuntimeException("Can't get hold on the transaction value view");
 248
 249         if (mProfileListAdapter == null)
 250             mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 251         root.setAdapter(mProfileListAdapter);
 252
 253         mProfileListAdapter.editingProfiles.observe(this, newValue -> {
 254             if (newValue) {
 255                 profileListHeadMore.setVisibility(View.GONE);
 256                 profileListHeadCancel.setVisibility(View.VISIBLE);
 257                 profileListHeadAddProfile.setVisibility(View.VISIBLE);
 258                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 259                     profileListHeadMore.startAnimation(
 260                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 261                     profileListHeadCancel.startAnimation(
 262                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 263                     profileListHeadAddProfile.startAnimation(
 264                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 265                 }
 266             }
 267             else {
 268                 profileListHeadCancel.setVisibility(View.GONE);
 269                 profileListHeadMore.setVisibility(View.VISIBLE);
 270                 profileListHeadAddProfile.setVisibility(View.GONE);
 271                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 272                     profileListHeadCancel.startAnimation(
 273                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 274                     profileListHeadMore.startAnimation(
 275                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 276                     profileListHeadAddProfile.startAnimation(
 277                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 278                 }
 279             }
 280
 281             mProfileListAdapter.notifyDataSetChanged();
 282         });
 283
 284         LinearLayoutManager llm = new LinearLayoutManager(this);
 285
 286         llm.setOrientation(RecyclerView.VERTICAL);
 287         root.setLayoutManager(llm);
 288
 289         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 290         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 291         profileListHeadMoreAndCancel.setOnClickListener(
 292                 (v) -> mProfileListAdapter.flipEditingProfiles());
 293         if (drawerListener == null) {
 294             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 295                 @Override
 296                 public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
 297                     if (slideOffset > 0.2)
 298                         fabHide();
 299                 }
 300                 @Override
 301                 public void onDrawerClosed(View drawerView) {
 302                     super.onDrawerClosed(drawerView);
 303                     mProfileListAdapter.setAnimationsEnabled(false);
 304                     mProfileListAdapter.editingProfiles.setValue(false);
 305                     Data.drawerOpen.setValue(false);
 306                     fabShouldShow();
 307                 }
 308                 @Override
 309                 public void onDrawerOpened(View drawerView) {
 310                     super.onDrawerOpened(drawerView);
 311                     mProfileListAdapter.setAnimationsEnabled(true);
 312                     Data.drawerOpen.setValue(true);
 313                     fabHide();
 314                 }
 315             };
 316             drawer.addDrawerListener(drawerListener);
 317         }
 318
 319         Data.drawerOpen.observe(this, open -> {
 320             if (open)
 321                 drawer.open();
 322             else
 323                 drawer.close();
 324         });
 325     }
 326     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 327         long now = new Date().getTime();
 328         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 329             if (lastUpdate == null)
 330                 debug("db::", "WEB data never fetched. scheduling a fetch");
 331             else
 332                 debug("db", String.format(Locale.ENGLISH,
 333                         "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 334                         lastUpdate.getTime() / 1000f, now / 1000f));
 335
 336             Data.scheduleTransactionListRetrieval(this);
 337         }
 338     }
 339     private void createShortcuts(List<MobileLedgerProfile> list) {
 340         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
 341             return;
 342
 343         ShortcutManager sm = getSystemService(ShortcutManager.class);
 344         List<ShortcutInfo> shortcuts = new ArrayList<>();
 345         int i = 0;
 346         for (MobileLedgerProfile p : list) {
 347             if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
 348                 break;
 349
 350             if (!p.isPostingPermitted())
 351                 continue;
 352
 353             final ShortcutInfo.Builder builder =
 354                     new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid());
 355             ShortcutInfo si = builder.setShortLabel(p.getName())
 356                                      .setIcon(Icon.createWithResource(this,
 357                                              R.drawable.thick_plus_icon))
 358                                      .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 359                                              NewTransactionActivity.class).putExtra("profile_uuid",
 360                                              p.getUuid()))
 361                                      .setRank(i)
 362                                      .build();
 363             shortcuts.add(si);
 364             i++;
 365         }
 366         sm.setDynamicShortcuts(shortcuts);
 367     }
 368     private void onProfileListChanged(List<MobileLedgerProfile> newList) {
 369         if ((newList == null) || newList.isEmpty()) {
 370             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 371             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 372             return;
 373         }
 374
 375         findViewById(R.id.main_app_layout).setVisibility(View.VISIBLE);
 376         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 377
 378         findViewById(R.id.nav_profile_list).setMinimumHeight(
 379                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 380
 381         debug("profiles", "profile list changed");
 382         mProfileListAdapter.notifyDataSetChanged();
 383
 384         createShortcuts(newList);
 385     }
 386     /**
 387      * called when the current profile has changed
 388      */
 389     private void onProfileChanged(MobileLedgerProfile profile) {
 390         boolean haveProfile = profile != null;
 391
 392         if (haveProfile)
 393             setTitle(profile.getName());
 394         else
 395             setTitle(R.string.app_name);
 396
 397         if (this.profile != null)
 398             this.profile.getAccounts()
 399                         .removeObservers(this);
 400
 401         this.profile = profile;
 402
 403         int newProfileTheme = haveProfile ? profile.getThemeHue() : -1;
 404         if (newProfileTheme != Colors.profileThemeId) {
 405             debug("profiles",
 406                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 407                             newProfileTheme));
 408             Colors.profileThemeId = newProfileTheme;
 409             profileThemeChanged();
 410             // profileThemeChanged would restart the activity, so no need to reload the
 411             // data sets below
 412             return;
 413         }
 414
 415         findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 416         findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 417
 418         mProfileListAdapter.notifyDataSetChanged();
 419
 420         Data.transactions.clear();
 421         debug("transactions", "requesting list reload");
 422         TransactionListViewModel.scheduleTransactionListReload();
 423
 424         if (haveProfile) {
 425             profile.scheduleAccountListReload();
 426
 427             if (profile.isPostingPermitted()) {
 428                 mToolbar.setSubtitle(null);
 429                 fab.show();
 430             }
 431             else {
 432                 mToolbar.setSubtitle(R.string.profile_subtitle_read_only);
 433                 fab.hide();
 434             }
 435         }
 436         else {
 437             mToolbar.setSubtitle(null);
 438             fab.hide();
 439         }
 440
 441         updateLastUpdateTextFromDB();
 442     }
 443     private void updateLastUpdateDisplay(Date newValue) {
 444         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 445         TextView v = findViewById(R.id.transactions_last_update);
 446         if (newValue == null) {
 447             l.setVisibility(View.INVISIBLE);
 448             debug("main", "no last update date :(");
 449         }
 450         else {
 451             final String text = DateFormat.getDateTimeInstance()
 452                                           .format(newValue);
 453             v.setText(text);
 454             l.setVisibility(View.VISIBLE);
 455             debug("main", String.format("Date formatted: %s", text));
 456         }
 457
 458         scheduleDataRetrievalIfStale(newValue);
 459     }
 460     private void profileThemeChanged() {
 461         storeThemeIdInPrefs(profile.getThemeHue());
 462
 463         // un-hook all observed LiveData
 464         Data.profile.removeObservers(this);
 465         Data.profiles.removeObservers(this);
 466         Data.lastUpdateDate.removeObservers(this);
 467
 468         recreate();
 469     }
 470     private void storeThemeIdInPrefs(int themeId) {
 471         // store the new theme id in the preferences
 472         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 473         SharedPreferences.Editor e = prefs.edit();
 474         e.putInt(PREF_THEME_ID, themeId);
 475         e.apply();
 476     }
 477     public void startEditProfileActivity(MobileLedgerProfile profile) {
 478         Intent intent = new Intent(this, ProfileDetailActivity.class);
 479         Bundle args = new Bundle();
 480         if (profile != null) {
 481             int index = Data.getProfileIndex(profile);
 482             if (index != -1)
 483                 intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 484         }
 485         intent.putExtras(args);
 486         startActivity(intent, args);
 487     }
 488     private void setupProfile() {
 489         MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
 490             @Override
 491             protected void onResult(String profileUUID) {
 492                 MobileLedgerProfile startupProfile;
 493
 494                 startupProfile = Data.getProfile(profileUUID);
 495                 Data.setCurrentProfile(startupProfile);
 496             }
 497         });
 498     }
 499     public void fabNewTransactionClicked(View view) {
 500         Intent intent = new Intent(this, NewTransactionActivity.class);
 501         startActivity(intent);
 502         overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
 503     }
 504     public void markDrawerItemCurrent(int id) {
 505         TextView item = drawer.findViewById(id);
 506         item.setBackgroundColor(Colors.tableRowDarkBG);
 507
 508         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 509         for (int i = 0; i < actions.getChildCount(); i++) {
 510             View view = actions.getChildAt(i);
 511             if (view.getId() != id) {
 512                 view.setBackgroundColor(Color.TRANSPARENT);
 513             }
 514         }
 515     }
 516     public void onAccountSummaryClicked(View view) {
 517         drawer.closeDrawers();
 518
 519         showAccountSummaryFragment();
 520     }
 521     private void showAccountSummaryFragment() {
 522         mViewPager.setCurrentItem(0, true);
 523         Data.accountFilter.setValue(null);
 524     }
 525     public void onLatestTransactionsClicked(View view) {
 526         drawer.closeDrawers();
 527
 528         showTransactionsFragment((String) null);
 529     }
 530     public void showTransactionsFragment(String accName) {
 531         Data.accountFilter.setValue(accName);
 532         mViewPager.setCurrentItem(1, true);
 533     }
 534     public void showAccountTransactions(String accountName) {
 535         mBackMeansToAccountList = true;
 536         showTransactionsFragment(accountName);
 537     }
 538     @Override
 539     public void onBackPressed() {
 540         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 541         if (drawer.isDrawerOpen(GravityCompat.START)) {
 542             drawer.closeDrawer(GravityCompat.START);
 543         }
 544         else {
 545             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 546                 Data.accountFilter.setValue(null);
 547                 showAccountSummaryFragment();
 548                 mBackMeansToAccountList = false;
 549             }
 550             else {
 551                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 552                         getSupportFragmentManager().getBackStackEntryCount()));
 553
 554                 super.onBackPressed();
 555             }
 556         }
 557     }
 558     public void updateLastUpdateTextFromDB() {
 559         if (profile == null)
 560             return;
 561
 562         long last_update = profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
 563
 564         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 565         if (last_update == 0) {
 566             Data.lastUpdateDate.postValue(null);
 567         }
 568         else {
 569             Data.lastUpdateDate.postValue(new Date(last_update));
 570         }
 571     }
 572     public void onStopTransactionRefreshClick(View view) {
 573         debug("interactive", "Cancelling transactions refresh");
 574         Data.stopTransactionsRetrieval();
 575         bTransactionListCancelDownload.setEnabled(false);
 576     }
 577     public void onRetrieveDone(String error) {
 578         Data.transactionRetrievalDone();
 579         findViewById(R.id.transaction_progress_layout).setVisibility(View.GONE);
 580
 581         if (error == null) {
 582             updateLastUpdateTextFromDB();
 583
 584             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 585             TransactionListViewModel.scheduleTransactionListReload();
 586         }
 587         else
 588             Snackbar.make(mViewPager, error, Snackbar.LENGTH_LONG)
 589                     .show();
 590     }
 591     public void onRetrieveStart() {
 592         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 593         bTransactionListCancelDownload.setEnabled(true);
 594         ColorStateList csl = Colors.getColorStateList();
 595         progressBar.setIndeterminateTintList(csl);
 596         progressBar.setProgressTintList(csl);
 597         progressBar.setIndeterminate(true);
 598         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 599             progressBar.setProgress(0, false);
 600         else
 601             progressBar.setProgress(0);
 602         findViewById(R.id.transaction_progress_layout).setVisibility(View.VISIBLE);
 603     }
 604     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 605         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 606         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 607             (progress.getTotal() == 0))
 608         {
 609             progressBar.setIndeterminate(true);
 610         }
 611         else {
 612             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 613                 progressBar.setMin(0);
 614             }
 615             progressBar.setMax(progress.getTotal());
 616             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 617                 progressBar.setProgress(progress.getProgress(), true);
 618             }
 619             else
 620                 progressBar.setProgress(progress.getProgress());
 621             progressBar.setIndeterminate(false);
 622         }
 623     }
 624     public void fabShouldShow() {
 625         if ((profile != null) && profile.isPostingPermitted() && !drawer.isOpen())
 626             fab.show();
 627         else
 628             fabHide();
 629     }
 630     public void fabHide() {
 631         fab.hide();
 632     }
 633     public void onAccountSummaryRowViewClicked(View view) {
 634         ViewGroup row;
 635         switch (view.getId()) {
 636             case R.id.account_expander:
 637                 row = (ViewGroup) view.getParent()
 638                                       .getParent()
 639                                       .getParent();
 640                 break;
 641             case R.id.account_expander_container:
 642             case R.id.account_row_acc_name:
 643                 row = (ViewGroup) view.getParent()
 644                                       .getParent();
 645                 break;
 646             default:
 647                 row = (ViewGroup) view.getParent();
 648                 break;
 649         }
 650
 651         LedgerAccount acc = (LedgerAccount) row.getTag();
 652         switch (view.getId()) {
 653             case R.id.account_row_acc_name:
 654             case R.id.account_expander:
 655             case R.id.account_expander_container:
 656                 break;
 657             case R.id.account_row_acc_amounts:
 658                 break;
 659         }
 660     }
 661
 662     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 663
 664         SectionsPagerAdapter(FragmentManager fm) {
 665             super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
 666         }
 667
 668         @NotNull
 669         @Override
 670         public Fragment getItem(int position) {
 671             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 672             switch (position) {
 673                 case 0:
 674 //                    debug("flow", "Creating account summary fragment");
 675                     return new AccountSummaryFragment();
 676                 case 1:
 677                     return new TransactionListFragment();
 678                 default:
 679                     throw new IllegalStateException(
 680                             String.format("Unexpected fragment index: " + "%d", position));
 681             }
 682         }
 683
 684         @Override
 685         public int getCount() {
 686             return 2;
 687         }
 688     }
 689 }