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

   1 /*
   2  * Copyright © 2019 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.ViewPropertyAnimator;
  35 import android.view.animation.AnimationUtils;
  36 import android.widget.LinearLayout;
  37 import android.widget.ProgressBar;
  38 import android.widget.TextView;
  39
  40 import androidx.annotation.NonNull;
  41 import androidx.appcompat.app.ActionBarDrawerToggle;
  42 import androidx.appcompat.widget.Toolbar;
  43 import androidx.core.view.GravityCompat;
  44 import androidx.drawerlayout.widget.DrawerLayout;
  45 import androidx.fragment.app.Fragment;
  46 import androidx.fragment.app.FragmentManager;
  47 import androidx.fragment.app.FragmentPagerAdapter;
  48 import androidx.recyclerview.widget.LinearLayoutManager;
  49 import androidx.recyclerview.widget.RecyclerView;
  50 import androidx.viewpager.widget.ViewPager;
  51
  52 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  53 import com.google.android.material.snackbar.Snackbar;
  54
  55 import net.ktnx.mobileledger.R;
  56 import net.ktnx.mobileledger.async.DbOpQueue;
  57 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  58 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  59 import net.ktnx.mobileledger.model.Data;
  60 import net.ktnx.mobileledger.model.LedgerAccount;
  61 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  62 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
  63 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  64 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
  65 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  66 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  67 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  68 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  69 import net.ktnx.mobileledger.utils.Colors;
  70 import net.ktnx.mobileledger.utils.GetOptCallback;
  71 import net.ktnx.mobileledger.utils.LockHolder;
  72 import net.ktnx.mobileledger.utils.MLDB;
  73
  74 import org.jetbrains.annotations.NotNull;
  75
  76 import java.text.DateFormat;
  77 import java.util.ArrayList;
  78 import java.util.Date;
  79 import java.util.List;
  80 import java.util.Locale;
  81
  82 import static net.ktnx.mobileledger.utils.Logger.debug;
  83
  84 /*
  85  * TODO: reports
  86  *  */
  87
  88 public class MainActivity extends ProfileThemedActivity {
  89     public static final String STATE_CURRENT_PAGE = "current_page";
  90     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  91     public static final String STATE_ACC_FILTER = "account_filter";
  92     private static final String PREF_THEME_ID = "themeId";
  93     public AccountSummaryFragment mAccountSummaryFragment;
  94     DrawerLayout drawer;
  95     private View profileListHeadMore, profileListHeadCancel, profileListHeadAddProfile;
  96     private View bTransactionListCancelDownload;
  97     private SectionsPagerAdapter mSectionsPagerAdapter;
  98     private ViewPager mViewPager;
  99     private FloatingActionButton fab;
 100     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 101     private int mCurrentPage;
 102     private boolean mBackMeansToAccountList = false;
 103     private Toolbar mToolbar;
 104     private DrawerLayout.SimpleDrawerListener drawerListener;
 105     private ActionBarDrawerToggle barDrawerToggle;
 106     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 107     private MobileLedgerProfile profile;
 108     @Override
 109     protected void onStart() {
 110         super.onStart();
 111
 112         mViewPager.setCurrentItem(mCurrentPage, false);
 113     }
 114     @Override
 115     protected void onSaveInstanceState(@NotNull Bundle outState) {
 116         super.onSaveInstanceState(outState);
 117         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 118         if (Data.accountFilter.getValue() != null)
 119             outState.putString(STATE_ACC_FILTER, Data.accountFilter.getValue());
 120     }
 121     @Override
 122     protected void onDestroy() {
 123         mSectionsPagerAdapter = null;
 124         RecyclerView root = findViewById(R.id.nav_profile_list);
 125         if (root != null)
 126             root.setAdapter(null);
 127         if (drawer != null)
 128             drawer.removeDrawerListener(drawerListener);
 129         drawerListener = null;
 130         if (drawer != null)
 131             drawer.removeDrawerListener(barDrawerToggle);
 132         barDrawerToggle = null;
 133         if (mViewPager != null)
 134             mViewPager.removeOnPageChangeListener(pageChangeListener);
 135         pageChangeListener = null;
 136         super.onDestroy();
 137     }
 138     @Override
 139     protected void setupProfileColors() {
 140         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 141         int profileColor = prefs.getInt(PREF_THEME_ID, -2);
 142         if (profileColor == -2)
 143             profileColor = Data.retrieveCurrentThemeIdFromDb();
 144         Colors.setupTheme(this, profileColor);
 145         Colors.profileThemeId = profileColor;
 146         storeThemeIdInPrefs(profileColor);
 147     }
 148     @Override
 149     protected void onResume() {
 150         super.onResume();
 151         fabShouldShow();
 152     }
 153     @Override
 154     protected void onCreate(Bundle savedInstanceState) {
 155         super.onCreate(savedInstanceState);
 156         debug("flow", "MainActivity.onCreate()");
 157         setContentView(R.layout.activity_main);
 158
 159         fab = findViewById(R.id.btn_add_transaction);
 160         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 161         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 162         LinearLayout profileListHeadMoreAndCancel =
 163                 findViewById(R.id.nav_profile_list_head_buttons);
 164         profileListHeadAddProfile = findViewById(R.id.nav_new_profile_button);
 165         drawer = findViewById(R.id.drawer_layout);
 166         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 167         mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
 168         mViewPager = findViewById(R.id.root_frame);
 169
 170         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 171         if (extra != null && savedInstanceState == null)
 172             savedInstanceState = extra;
 173
 174
 175         mToolbar = findViewById(R.id.toolbar);
 176         setSupportActionBar(mToolbar);
 177
 178         Data.profile.observe(this, this::onProfileChanged);
 179
 180         Data.profiles.observe(this, this::onProfileListChanged);
 181
 182         if (barDrawerToggle == null) {
 183             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 184                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 185             drawer.addDrawerListener(barDrawerToggle);
 186         }
 187         barDrawerToggle.syncState();
 188         drawer.addDrawerListener(new DrawerLayout.DrawerListener() {
 189             @Override
 190             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
 191                 if (slideOffset > 0.2)
 192                     fabHide();
 193             }
 194             @Override
 195             public void onDrawerOpened(@NonNull View drawerView) {
 196                 fabHide();
 197             }
 198             @Override
 199             public void onDrawerClosed(@NonNull View drawerView) {
 200                 fabShouldShow();
 201             }
 202             @Override
 203             public void onDrawerStateChanged(int newState) {}
 204         });
 205
 206
 207         try {
 208             PackageInfo pi = getApplicationContext().getPackageManager()
 209                                                     .getPackageInfo(getPackageName(), 0);
 210             ((TextView) findViewById(R.id.nav_upper).findViewById(
 211                     R.id.drawer_version_text)).setText(pi.versionName);
 212             ((TextView) findViewById(R.id.no_profiles_layout).findViewById(
 213                     R.id.drawer_version_text)).setText(pi.versionName);
 214         }
 215         catch (Exception e) {
 216             e.printStackTrace();
 217         }
 218
 219         markDrawerItemCurrent(R.id.nav_account_summary);
 220
 221         mViewPager.setAdapter(mSectionsPagerAdapter);
 222
 223         if (pageChangeListener == null) {
 224             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 225                 @Override
 226                 public void onPageSelected(int position) {
 227                     mCurrentPage = position;
 228                     switch (position) {
 229                         case 0:
 230                             markDrawerItemCurrent(R.id.nav_account_summary);
 231                             break;
 232                         case 1:
 233                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 234                             break;
 235                         default:
 236                             Log.e("MainActivity",
 237                                     String.format("Unexpected page index %d", position));
 238                     }
 239
 240                     super.onPageSelected(position);
 241                 }
 242             };
 243             mViewPager.addOnPageChangeListener(pageChangeListener);
 244         }
 245
 246         mCurrentPage = 0;
 247         if (savedInstanceState != null) {
 248             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 249             if (currentPage != -1) {
 250                 mCurrentPage = currentPage;
 251             }
 252             Data.accountFilter.setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
 253         }
 254
 255         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 256
 257         findViewById(R.id.btn_no_profiles_add).setOnClickListener(
 258                 v -> startEditProfileActivity(null));
 259
 260         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 261
 262         findViewById(R.id.nav_new_profile_button).setOnClickListener(
 263                 v -> startEditProfileActivity(null));
 264
 265         RecyclerView root = findViewById(R.id.nav_profile_list);
 266         if (root == null)
 267             throw new RuntimeException("Can't get hold on the transaction value view");
 268
 269         if (mProfileListAdapter == null)
 270             mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 271         root.setAdapter(mProfileListAdapter);
 272
 273         mProfileListAdapter.editingProfiles.observe(this, newValue -> {
 274             if (newValue) {
 275                 profileListHeadMore.setVisibility(View.GONE);
 276                 profileListHeadCancel.setVisibility(View.VISIBLE);
 277                 profileListHeadAddProfile.setVisibility(View.VISIBLE);
 278                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 279                     profileListHeadMore.startAnimation(
 280                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 281                     profileListHeadCancel.startAnimation(
 282                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 283                     profileListHeadAddProfile.startAnimation(
 284                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 285                 }
 286             }
 287             else {
 288                 profileListHeadCancel.setVisibility(View.GONE);
 289                 profileListHeadMore.setVisibility(View.VISIBLE);
 290                 profileListHeadAddProfile.setVisibility(View.GONE);
 291                 if (drawer.isDrawerOpen(GravityCompat.START)) {
 292                     profileListHeadCancel.startAnimation(
 293                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 294                     profileListHeadMore.startAnimation(
 295                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
 296                     profileListHeadAddProfile.startAnimation(
 297                             AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
 298                 }
 299             }
 300
 301             mProfileListAdapter.notifyDataSetChanged();
 302         });
 303
 304         LinearLayoutManager llm = new LinearLayoutManager(this);
 305
 306         llm.setOrientation(RecyclerView.VERTICAL);
 307         root.setLayoutManager(llm);
 308
 309         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 310         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 311         profileListHeadMoreAndCancel.setOnClickListener(
 312                 (v) -> mProfileListAdapter.flipEditingProfiles());
 313         if (drawerListener == null) {
 314             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 315                 @Override
 316                 public void onDrawerClosed(View drawerView) {
 317                     super.onDrawerClosed(drawerView);
 318                     mProfileListAdapter.setAnimationsEnabled(false);
 319                     mProfileListAdapter.editingProfiles.setValue(false);
 320                 }
 321                 @Override
 322                 public void onDrawerOpened(View drawerView) {
 323                     super.onDrawerOpened(drawerView);
 324                     mProfileListAdapter.setAnimationsEnabled(true);
 325                 }
 326             };
 327             drawer.addDrawerListener(drawerListener);
 328         }
 329         setupProfile();
 330     }
 331     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 332         long now = new Date().getTime();
 333         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 334             if (lastUpdate == null)
 335                 debug("db::", "WEB data never fetched. scheduling a fetch");
 336             else
 337                 debug("db", String.format(Locale.ENGLISH,
 338                         "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 339                         lastUpdate.getTime() / 1000f, now / 1000f));
 340
 341             Data.scheduleTransactionListRetrieval(this);
 342         }
 343     }
 344     private void createShortcuts(List<MobileLedgerProfile> list) {
 345         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
 346             return;
 347
 348         ShortcutManager sm = getSystemService(ShortcutManager.class);
 349         List<ShortcutInfo> shortcuts = new ArrayList<>();
 350         int i = 0;
 351         for (MobileLedgerProfile p : list) {
 352             if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
 353                 break;
 354
 355             if (!p.isPostingPermitted())
 356                 continue;
 357
 358             ShortcutInfo si =
 359                     new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid()).setShortLabel(
 360                             p.getName())
 361                                                                                     .setIcon(
 362                                                                                             Icon.createWithResource(
 363                                                                                                     this,
 364                                                                                                     R.drawable.svg_thick_plus_white))
 365                                                                                     .setIntent(
 366                                                                                             new Intent(
 367                                                                                                     Intent.ACTION_VIEW,
 368                                                                                                     null,
 369                                                                                                     this,
 370                                                                                                     NewTransactionActivity.class).putExtra(
 371                                                                                                     "profile_uuid",
 372                                                                                                     p.getUuid()))
 373                                                                                     .setRank(i)
 374                                                                                     .build();
 375             shortcuts.add(si);
 376             i++;
 377         }
 378         sm.setDynamicShortcuts(shortcuts);
 379     }
 380     private void onProfileListChanged(List<MobileLedgerProfile> newList) {
 381         if (newList == null) {
 382             // profiles not yet loaded from DB
 383             findViewById(R.id.loading_layout).setVisibility(View.VISIBLE);
 384             findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 385             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 386             return;
 387         }
 388
 389         if (newList.isEmpty()) {
 390             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 391             findViewById(R.id.main_app_layout).setVisibility(View.GONE);
 392             findViewById(R.id.loading_layout).setVisibility(View.GONE);
 393             return;
 394         }
 395
 396         findViewById(R.id.main_app_layout).setVisibility(View.VISIBLE);
 397         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 398         findViewById(R.id.loading_layout).setVisibility(View.GONE);
 399
 400         findViewById(R.id.nav_profile_list).setMinimumHeight(
 401                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 402
 403         debug("profiles", "profile list changed");
 404         mProfileListAdapter.notifyDataSetChanged();
 405
 406         createShortcuts(newList);
 407     }
 408     /**
 409      * called when the current profile has changed
 410      */
 411     private void onProfileChanged(MobileLedgerProfile profile) {
 412         boolean haveProfile = profile != null;
 413         findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 414         findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 415
 416         if (haveProfile)
 417             setTitle(profile.getName());
 418         else
 419             setTitle(R.string.app_name);
 420
 421         this.profile = profile;
 422
 423         mProfileListAdapter.notifyDataSetChanged();
 424
 425         int newProfileTheme = haveProfile ? profile.getThemeHue() : -1;
 426         if (newProfileTheme != Colors.profileThemeId) {
 427             debug("profiles",
 428                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 429                             newProfileTheme));
 430             MainActivity.this.profileThemeChanged();
 431             Colors.profileThemeId = newProfileTheme;
 432             // profileThemeChanged would restart the activity, so no need to reload the
 433             // data sets below
 434             return;
 435         }
 436
 437         drawer.closeDrawers();
 438
 439         Data.transactions.clear();
 440         debug("transactions", "requesting list reload");
 441         TransactionListViewModel.scheduleTransactionListReload();
 442
 443         Data.accounts.clear();
 444         AccountSummaryViewModel.scheduleAccountListReload();
 445
 446         if (haveProfile) {
 447             if (profile.isPostingPermitted()) {
 448                 mToolbar.setSubtitle(null);
 449                 fab.show();
 450             }
 451             else {
 452                 mToolbar.setSubtitle(R.string.profile_subtitle_read_only);
 453                 fab.hide();
 454             }
 455         }
 456         else {
 457             mToolbar.setSubtitle(null);
 458             fab.hide();
 459         }
 460
 461         updateLastUpdateTextFromDB();
 462     }
 463     private void updateLastUpdateDisplay(Date newValue) {
 464         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 465         TextView v = findViewById(R.id.transactions_last_update);
 466         if (newValue == null) {
 467             l.setVisibility(View.INVISIBLE);
 468             debug("main", "no last update date :(");
 469         }
 470         else {
 471             final String text = DateFormat.getDateTimeInstance()
 472                                           .format(newValue);
 473             v.setText(text);
 474             l.setVisibility(View.VISIBLE);
 475             debug("main", String.format("Date formatted: %s", text));
 476         }
 477
 478         scheduleDataRetrievalIfStale(newValue);
 479     }
 480     private void profileThemeChanged() {
 481         storeThemeIdInPrefs(profile.getThemeHue());
 482
 483         // un-hook all observed LiveData
 484         Data.profile.removeObservers(this);
 485         Data.profiles.removeObservers(this);
 486         Data.lastUpdateDate.removeObservers(this);
 487
 488         recreate();
 489     }
 490     private void storeThemeIdInPrefs(int themeId) {
 491         // store the new theme id in the preferences
 492         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 493         SharedPreferences.Editor e = prefs.edit();
 494         e.putInt(PREF_THEME_ID, themeId);
 495         e.apply();
 496     }
 497     public void startEditProfileActivity(MobileLedgerProfile profile) {
 498         Intent intent = new Intent(this, ProfileDetailActivity.class);
 499         Bundle args = new Bundle();
 500         if (profile != null) {
 501             int index = Data.getProfileIndex(profile);
 502             if (index != -1)
 503                 intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 504         }
 505         intent.putExtras(args);
 506         startActivity(intent, args);
 507     }
 508     private void setupProfile() {
 509         MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
 510             @Override
 511             protected void onResult(String profileUUID) {
 512                 MobileLedgerProfile startupProfile;
 513
 514                 startupProfile = Data.getProfile(profileUUID);
 515                 Data.setCurrentProfile(startupProfile);
 516             }
 517         });
 518     }
 519     public void fabNewTransactionClicked(View view) {
 520         Intent intent = new Intent(this, NewTransactionActivity.class);
 521         startActivity(intent);
 522         overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
 523     }
 524     public void markDrawerItemCurrent(int id) {
 525         TextView item = drawer.findViewById(id);
 526         item.setBackgroundColor(Colors.tableRowDarkBG);
 527
 528         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 529         for (int i = 0; i < actions.getChildCount(); i++) {
 530             View view = actions.getChildAt(i);
 531             if (view.getId() != id) {
 532                 view.setBackgroundColor(Color.TRANSPARENT);
 533             }
 534         }
 535     }
 536     public void onAccountSummaryClicked(View view) {
 537         drawer.closeDrawers();
 538
 539         showAccountSummaryFragment();
 540     }
 541     private void showAccountSummaryFragment() {
 542         mViewPager.setCurrentItem(0, true);
 543         Data.accountFilter.setValue(null);
 544     }
 545     public void onLatestTransactionsClicked(View view) {
 546         drawer.closeDrawers();
 547
 548         showTransactionsFragment((String) null);
 549     }
 550     private void showTransactionsFragment(String accName) {
 551         Data.accountFilter.setValue(accName);
 552         mViewPager.setCurrentItem(1, true);
 553     }
 554     private void showTransactionsFragment(LedgerAccount account) {
 555         showTransactionsFragment((account == null) ? null : account.getName());
 556     }
 557     public void showAccountTransactions(LedgerAccount account) {
 558         mBackMeansToAccountList = true;
 559         showTransactionsFragment(account);
 560     }
 561     @Override
 562     public void onBackPressed() {
 563         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 564         if (drawer.isDrawerOpen(GravityCompat.START)) {
 565             drawer.closeDrawer(GravityCompat.START);
 566         }
 567         else {
 568             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 569                 Data.accountFilter.setValue(null);
 570                 showAccountSummaryFragment();
 571                 mBackMeansToAccountList = false;
 572             }
 573             else {
 574                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 575                         getSupportFragmentManager().getBackStackEntryCount()));
 576
 577                 super.onBackPressed();
 578             }
 579         }
 580     }
 581     public void updateLastUpdateTextFromDB() {
 582         if (profile == null)
 583             return;
 584
 585         long last_update = profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
 586
 587         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 588         if (last_update == 0) {
 589             Data.lastUpdateDate.postValue(null);
 590         }
 591         else {
 592             Data.lastUpdateDate.postValue(new Date(last_update));
 593         }
 594     }
 595     public void onStopTransactionRefreshClick(View view) {
 596         debug("interactive", "Cancelling transactions refresh");
 597         Data.stopTransactionsRetrieval();
 598         bTransactionListCancelDownload.setEnabled(false);
 599     }
 600     public void onRetrieveDone(String error) {
 601         Data.transactionRetrievalDone();
 602         findViewById(R.id.transaction_progress_layout).setVisibility(View.GONE);
 603
 604         if (error == null) {
 605             updateLastUpdateTextFromDB();
 606
 607             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 608             TransactionListViewModel.scheduleTransactionListReload();
 609         }
 610         else
 611             Snackbar.make(mViewPager, error, Snackbar.LENGTH_LONG)
 612                     .show();
 613     }
 614     public void onRetrieveStart() {
 615         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 616         bTransactionListCancelDownload.setEnabled(true);
 617         ColorStateList csl = Colors.getColorStateList();
 618         progressBar.setIndeterminateTintList(csl);
 619         progressBar.setProgressTintList(csl);
 620         progressBar.setIndeterminate(true);
 621         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
 622             progressBar.setProgress(0, false);
 623         else
 624             progressBar.setProgress(0);
 625         findViewById(R.id.transaction_progress_layout).setVisibility(View.VISIBLE);
 626     }
 627     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 628         ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
 629         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 630             (progress.getTotal() == 0))
 631         {
 632             progressBar.setIndeterminate(true);
 633         }
 634         else {
 635             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 636                 progressBar.setMin(0);
 637             }
 638             progressBar.setMax(progress.getTotal());
 639             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 640                 progressBar.setProgress(progress.getProgress(), true);
 641             }
 642             else
 643                 progressBar.setProgress(progress.getProgress());
 644             progressBar.setIndeterminate(false);
 645         }
 646     }
 647     public void fabShouldShow() {
 648         if ((profile != null) && profile.isPostingPermitted() && !drawer.isOpen())
 649             fab.show();
 650     }
 651     public void fabHide() {
 652         fab.hide();
 653     }
 654     public void onAccountSummaryRowViewClicked(View view) {
 655         ViewGroup row;
 656         if (view.getId() == R.id.account_expander)
 657             row = (ViewGroup) view.getParent()
 658                                   .getParent();
 659         else
 660             row = (ViewGroup) view.getParent();
 661
 662         LedgerAccount acc = (LedgerAccount) row.getTag();
 663         switch (view.getId()) {
 664             case R.id.account_row_acc_name:
 665             case R.id.account_expander:
 666             case R.id.account_expander_container:
 667                 debug("accounts", "Account expander clicked");
 668                 if (!acc.hasSubAccounts())
 669                     return;
 670
 671                 boolean wasExpanded = acc.isExpanded();
 672
 673                 View arrow = row.findViewById(R.id.account_expander_container);
 674
 675                 arrow.clearAnimation();
 676                 ViewPropertyAnimator animator = arrow.animate();
 677
 678                 acc.toggleExpanded();
 679                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 680                         new Object[]{acc.isExpanded(), acc.getName(), profile.getUuid()
 681                         });
 682
 683                 if (wasExpanded) {
 684                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 685                     arrow.setRotation(0);
 686                     animator.rotationBy(180);
 687
 688                     // removing all child accounts from the view
 689                     int start = -1, count = 0;
 690                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 691                         for (int i = 0; i < Data.accounts.size(); i++) {
 692                             if (acc.isParentOf(Data.accounts.get(i))) {
 693 //                                debug("accounts", String.format("Found a child '%s' at position
 694 //                                %d",
 695 //                                        Data.accounts.get(i).getName(), i));
 696                                 if (start == -1) {
 697                                     start = i;
 698                                 }
 699                                 count++;
 700                             }
 701                             else {
 702                                 if (start != -1) {
 703 //                                    debug("accounts",
 704 //                                            String.format("Found a non-child '%s' at position %d",
 705 //                                                    Data.accounts.get(i).getName(), i));
 706                                     break;
 707                                 }
 708                             }
 709                         }
 710
 711                         if (start != -1) {
 712                             for (int j = 0; j < count; j++) {
 713 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 714 //                                        Data.accounts.get(start).getName()));
 715                                 Data.accounts.removeQuietly(start);
 716                             }
 717
 718                             mAccountSummaryFragment.modelAdapter.notifyItemRangeRemoved(start,
 719                                     count);
 720                         }
 721                     }
 722                 }
 723                 else {
 724                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 725                     arrow.setRotation(180);
 726                     animator.rotationBy(-180);
 727                     List<LedgerAccount> children = profile.loadVisibleChildAccountsOf(acc);
 728                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 729                         int parentPos = Data.accounts.indexOf(acc);
 730                         if (parentPos != -1) {
 731                             // may have disappeared in a concurrent refresh operation
 732                             Data.accounts.addAllQuietly(parentPos + 1, children);
 733                             mAccountSummaryFragment.modelAdapter.notifyItemRangeInserted(
 734                                     parentPos + 1, children.size());
 735                         }
 736                     }
 737                 }
 738                 break;
 739             case R.id.account_row_acc_amounts:
 740                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 741                     acc.toggleAmountsExpanded();
 742                     DbOpQueue.add(
 743                             "update accounts set amounts_expanded=? where name=? and profile=?",
 744                             new Object[]{acc.amountsExpanded(), acc.getName(), profile.getUuid()
 745                             });
 746                     Data.accounts.triggerItemChangedNotification(acc);
 747                 }
 748                 break;
 749         }
 750     }
 751
 752     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 753
 754         SectionsPagerAdapter(FragmentManager fm) {
 755             super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
 756         }
 757
 758         @NotNull
 759         @Override
 760         public Fragment getItem(int position) {
 761             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 762             switch (position) {
 763                 case 0:
 764 //                    debug("flow", "Creating account summary fragment");
 765                     return mAccountSummaryFragment = new AccountSummaryFragment();
 766                 case 1:
 767                     return new TransactionListFragment();
 768                 default:
 769                     throw new IllegalStateException(
 770                             String.format("Unexpected fragment index: " + "%d", position));
 771             }
 772         }
 773
 774         @Override
 775         public int getCount() {
 776             return 2;
 777         }
 778     }
 779 }