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