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