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