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