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.pm.PackageInfo;
  22 import android.content.pm.ShortcutInfo;
  23 import android.content.pm.ShortcutManager;
  24 import android.content.res.ColorStateList;
  25 import android.graphics.Color;
  26 import android.graphics.drawable.Icon;
  27 import android.os.AsyncTask;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.util.Log;
  31 import android.view.View;
  32 import android.view.ViewGroup;
  33 import android.view.ViewPropertyAnimator;
  34 import android.view.animation.Animation;
  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.LockHolder;
  59 import net.ktnx.mobileledger.utils.MLDB;
  60
  61 import org.jetbrains.annotations.NotNull;
  62
  63 import java.lang.ref.WeakReference;
  64 import java.text.DateFormat;
  65 import java.util.ArrayList;
  66 import java.util.Date;
  67 import java.util.List;
  68 import java.util.Observer;
  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     public AccountSummaryFragment mAccountSummaryFragment;
  88     DrawerLayout drawer;
  89     private LinearLayout profileListContainer;
  90     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  91     private FragmentManager fragmentManager;
  92     private RetrieveTransactionsTask retrieveTransactionsTask;
  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 Observer profileObserver;
 105     private Observer profilesObserver;
 106     private Toolbar mToolbar;
 107     private DrawerLayout.SimpleDrawerListener drawerListener;
 108     private ActionBarDrawerToggle barDrawerToggle;
 109     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 110     private Observer editingProfilesObserver;
 111     @Override
 112     protected void onStart() {
 113         super.onStart();
 114
 115         debug("flow", "MainActivity.onStart()");
 116         mViewPager.setCurrentItem(mCurrentPage, false);
 117         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 118         else Data.accountFilter.setValue(null);
 119
 120     }
 121     @Override
 122     protected void onSaveInstanceState(@NotNull Bundle outState) {
 123         super.onSaveInstanceState(outState);
 124         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 125         if (mAccountFilter != null) outState.putString(STATE_ACC_FILTER, mAccountFilter);
 126     }
 127     @Override
 128     protected void onDestroy() {
 129         mSectionsPagerAdapter = null;
 130         Data.profile.deleteObserver(profileObserver);
 131         profileObserver = null;
 132         Data.profiles.deleteObserver(profilesObserver);
 133         profilesObserver = null;
 134         RecyclerView root = findViewById(R.id.nav_profile_list);
 135         if (root != null) root.setAdapter(null);
 136         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 137         drawerListener = null;
 138         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 139         barDrawerToggle = null;
 140         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 141         pageChangeListener = null;
 142         if (mProfileListAdapter != null)
 143             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 144         editingProfilesObserver = null;
 145         super.onDestroy();
 146     }
 147     @Override
 148     protected void onCreate(Bundle savedInstanceState) {
 149         super.onCreate(savedInstanceState);
 150         debug("flow", "MainActivity.onCreate()");
 151         int profileColor = Data.retrieveCurrentThemeIdFromDb();
 152         Colors.setupTheme(this, profileColor);
 153         Colors.profileThemeId = profileColor;
 154         setContentView(R.layout.activity_main);
 155
 156         fab = findViewById(R.id.btn_add_transaction);
 157         profileListContainer = findViewById(R.id.nav_profile_list_container);
 158         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 159         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 160         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 161         profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
 162         drawer = findViewById(R.id.drawer_layout);
 163         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 164         progressBar = findViewById(R.id.transaction_list_progress_bar);
 165         progressLayout = findViewById(R.id.transaction_progress_layout);
 166         fragmentManager = getSupportFragmentManager();
 167         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 168         mViewPager = findViewById(R.id.root_frame);
 169
 170         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 171         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 172
 173
 174         mToolbar = findViewById(R.id.toolbar);
 175         setSupportActionBar(mToolbar);
 176
 177         if (profileObserver == null) {
 178             profileObserver = (o, arg) -> onProfileChanged(arg);
 179             Data.profile.addObserver(profileObserver);
 180         }
 181
 182         if (profilesObserver == null) {
 183             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 184             Data.profiles.addObserver(profilesObserver);
 185         }
 186
 187         if (barDrawerToggle == null) {
 188             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 189                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 190             drawer.addDrawerListener(barDrawerToggle);
 191         }
 192         barDrawerToggle.syncState();
 193
 194         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 195
 196         try {
 197             PackageInfo pi =
 198                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 199             ver.setText(pi.versionName);
 200         }
 201         catch (Exception e) {
 202             e.printStackTrace();
 203         }
 204
 205         if (progressBar == null)
 206             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 207         if (progressLayout == null) throw new RuntimeException(
 208                 "Can't get hold on the transaction value progress bar layout");
 209
 210         markDrawerItemCurrent(R.id.nav_account_summary);
 211
 212         mViewPager.setAdapter(mSectionsPagerAdapter);
 213
 214         if (pageChangeListener == null) {
 215             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 216                 @Override
 217                 public void onPageSelected(int position) {
 218                     switch (position) {
 219                         case 0:
 220                             markDrawerItemCurrent(R.id.nav_account_summary);
 221                             break;
 222                         case 1:
 223                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 224                             break;
 225                         default:
 226                             Log.e("MainActivity",
 227                                     String.format("Unexpected page index %d", position));
 228                     }
 229
 230                     super.onPageSelected(position);
 231                 }
 232             };
 233             mViewPager.addOnPageChangeListener(pageChangeListener);
 234         }
 235
 236         mCurrentPage = 0;
 237         if (savedInstanceState != null) {
 238             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 239             if (currentPage != -1) {
 240                 mCurrentPage = currentPage;
 241             }
 242             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 243         }
 244         else mAccountFilter = null;
 245
 246         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 247
 248         findViewById(R.id.btn_no_profiles_add)
 249                 .setOnClickListener(v -> startEditProfileActivity(null));
 250
 251         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 252
 253         findViewById(R.id.nav_new_profile_button)
 254                 .setOnClickListener(v -> startEditProfileActivity(null));
 255
 256         RecyclerView root = findViewById(R.id.nav_profile_list);
 257         if (root == null)
 258             throw new RuntimeException("Can't get hold on the transaction value view");
 259
 260         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 261         root.setAdapter(mProfileListAdapter);
 262
 263         if (editingProfilesObserver == null) {
 264             editingProfilesObserver = (o, arg) -> {
 265                 if (mProfileListAdapter.isEditingProfiles()) {
 266                     profileListHeadArrow.clearAnimation();
 267                     profileListHeadArrow.setVisibility(View.GONE);
 268                     profileListHeadMore.setVisibility(View.GONE);
 269                     profileListHeadMore
 270                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 271                     profileListHeadCancel.setVisibility(View.VISIBLE);
 272                     profileListHeadCancel
 273                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 274                 }
 275                 else {
 276                     profileListHeadArrow.setRotation(180f);
 277                     profileListHeadArrow.setVisibility(View.VISIBLE);
 278                     profileListHeadCancel.setVisibility(View.GONE);
 279                     profileListHeadCancel
 280                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 281                     profileListHeadMore.setVisibility(View.GONE);
 282                     if (profileListExpanded) {
 283                         profileListHeadMore.setVisibility(View.VISIBLE);
 284                         profileListHeadMore
 285                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 286                     }
 287                     else profileListHeadMore.setVisibility(View.GONE);
 288                 }
 289             };
 290             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 291         }
 292
 293         LinearLayoutManager llm = new LinearLayoutManager(this);
 294
 295         llm.setOrientation(RecyclerView.VERTICAL);
 296         root.setLayoutManager(llm);
 297
 298         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 299         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 300         profileListHeadMoreAndCancel
 301                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 302
 303         if (drawerListener == null) {
 304             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 305                 @Override
 306                 public void onDrawerClosed(View drawerView) {
 307                     super.onDrawerClosed(drawerView);
 308                     collapseProfileList();
 309                 }
 310             };
 311             drawer.addDrawerListener(drawerListener);
 312         }
 313
 314         findViewById(R.id.nav_profile_list_head_layout)
 315                 .setOnClickListener(this::navProfilesHeadClicked);
 316         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 317         boolean initialStart = Data.profile.get() == null;
 318         setupProfile();
 319         if (!initialStart) onProfileChanged(null);
 320
 321         updateLastUpdateTextFromDB();
 322     }
 323     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 324         long now = new Date().getTime();
 325         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 326             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 327             else debug("db",
 328                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 329                             lastUpdate.getTime() / 1000f, now / 1000f));
 330
 331             scheduleTransactionListRetrieval();
 332         }
 333     }
 334     private void createShortcuts() {
 335         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return;
 336
 337         List<ShortcutInfo> shortcuts = new ArrayList<>();
 338         try (LockHolder lh = Data.profiles.lockForReading()) {
 339             for (int i = 0; i < Data.profiles.size(); i++) {
 340                 MobileLedgerProfile p = Data.profiles.get(i);
 341                 if (!p.isPostingPermitted()) continue;
 342
 343                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 344                         .setShortLabel(p.getName())
 345                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 346                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 347                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 348                         .setRank(i).build();
 349                 shortcuts.add(si);
 350             }
 351         }
 352         ShortcutManager sm = getSystemService(ShortcutManager.class);
 353         sm.setDynamicShortcuts(shortcuts);
 354     }
 355     private void onProfileListChanged(Object arg) {
 356         findViewById(R.id.nav_profile_list).setMinimumHeight(
 357                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 358                        Data.profiles.size()));
 359
 360         debug("profiles", "profile list changed");
 361         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 362         else mProfileListAdapter.notifyItemChanged((int) arg);
 363
 364         createShortcuts();
 365     }
 366     private void onProfileChanged(Object arg) {
 367         MobileLedgerProfile profile = Data.profile.get();
 368         MainActivity.this.runOnUiThread(() -> {
 369
 370             boolean haveProfile = profile != null;
 371             findViewById(R.id.no_profiles_layout)
 372                     .setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 373             findViewById(R.id.pager_layout)
 374                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 375
 376             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 377             else MainActivity.this.setTitle(profile.getName());
 378             MainActivity.this.updateLastUpdateTextFromDB();
 379             int old_index = -1;
 380             int new_index = -1;
 381             if (arg != null) {
 382                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 383                 old_index = Data.getProfileIndex(old);
 384                 new_index = Data.getProfileIndex(profile);
 385             }
 386
 387             if ((old_index != -1) && (new_index != -1)) {
 388                 mProfileListAdapter.notifyItemChanged(old_index);
 389                 mProfileListAdapter.notifyItemChanged(new_index);
 390             }
 391             else mProfileListAdapter.notifyDataSetChanged();
 392
 393             MainActivity.this.collapseProfileList();
 394
 395             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 396             if (newProfileTheme != Colors.profileThemeId) {
 397                 debug("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 398                         newProfileTheme));
 399                 MainActivity.this.profileThemeChanged();
 400                 Colors.profileThemeId = newProfileTheme;
 401                 // profileThemeChanged would restart the activity, so no need to reload the
 402                 // data sets below
 403                 return;
 404             }
 405             drawer.closeDrawers();
 406
 407             Data.transactions.clear();
 408             debug("transactions", "requesting list reload");
 409             TransactionListViewModel.scheduleTransactionListReload();
 410
 411             Data.accounts.clear();
 412             AccountSummaryViewModel.scheduleAccountListReload();
 413
 414             if (profile == null) {
 415                 mToolbar.setSubtitle(null);
 416                 fab.hide();
 417             }
 418             else {
 419                 if (profile.isPostingPermitted()) {
 420                     mToolbar.setSubtitle(null);
 421                     fab.show();
 422                 }
 423                 else {
 424                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 425                     fab.hide();
 426                 }
 427             }
 428
 429             updateLastUpdateTextFromDB();
 430         });
 431     }
 432     private void updateLastUpdateDisplay(Date newValue) {
 433         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 434         TextView v = findViewById(R.id.transactions_last_update);
 435         if (newValue == null) {
 436             l.setVisibility(View.INVISIBLE);
 437             debug("main", "no last update date :(");
 438         }
 439         else {
 440             final String text = DateFormat.getDateTimeInstance().format(newValue);
 441             v.setText(text);
 442             l.setVisibility(View.VISIBLE);
 443             debug("main", String.format("Date formatted: %s", text));
 444         }
 445
 446         scheduleDataRetrievalIfStale(newValue);
 447     }
 448     @Override
 449     public void finish() {
 450         if (profilesObserver != null) {
 451             Data.profiles.deleteObserver(profilesObserver);
 452             profilesObserver = null;
 453         }
 454
 455         if (profileObserver != null) {
 456             Data.profile.deleteObserver(profileObserver);
 457             profileObserver = null;
 458         }
 459
 460         super.finish();
 461     }
 462     private void profileThemeChanged() {
 463         setupProfileColors();
 464
 465         Bundle bundle = new Bundle();
 466         onSaveInstanceState(bundle);
 467         // restart activity to reflect theme change
 468         finish();
 469         Intent intent = new Intent(this, this.getClass());
 470         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 471         startActivity(intent);
 472     }
 473     public void startEditProfileActivity(MobileLedgerProfile profile) {
 474         Intent intent = new Intent(this, ProfileDetailActivity.class);
 475         Bundle args = new Bundle();
 476         if (profile != null) {
 477             int index = Data.getProfileIndex(profile);
 478             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 479         }
 480         intent.putExtras(args);
 481         startActivity(intent, args);
 482     }
 483     private void setupProfile() {
 484         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 485         MobileLedgerProfile profile;
 486
 487         profile = Data.getProfile(profileUUID);
 488
 489         if (Data.profiles.isEmpty()) {
 490             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 491             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 492             return;
 493         }
 494
 495         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 496         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 497
 498         if (profile == null) profile = Data.profiles.get(0);
 499
 500         if (profile == null) throw new AssertionError("profile must have a value");
 501
 502         Data.setCurrentProfile(profile);
 503     }
 504     public void fabNewTransactionClicked(View view) {
 505         Intent intent = new Intent(this, NewTransactionActivity.class);
 506         startActivity(intent);
 507         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 508     }
 509     public void navSettingsClicked(View view) {
 510         Intent intent = new Intent(this, SettingsActivity.class);
 511         startActivity(intent);
 512         drawer.closeDrawers();
 513     }
 514     public void markDrawerItemCurrent(int id) {
 515         TextView item = drawer.findViewById(id);
 516         item.setBackgroundColor(Colors.tableRowDarkBG);
 517
 518         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 519         for (int i = 0; i < actions.getChildCount(); i++) {
 520             View view = actions.getChildAt(i);
 521             if (view.getId() != id) {
 522                 view.setBackgroundColor(Color.TRANSPARENT);
 523             }
 524         }
 525     }
 526     public void onAccountSummaryClicked(View view) {
 527         drawer.closeDrawers();
 528
 529         showAccountSummaryFragment();
 530     }
 531     private void showAccountSummaryFragment() {
 532         mViewPager.setCurrentItem(0, true);
 533         Data.accountFilter.setValue(null);
 534     }
 535     public void onLatestTransactionsClicked(View view) {
 536         drawer.closeDrawers();
 537
 538         showTransactionsFragment((String) null);
 539     }
 540     private void showTransactionsFragment(String accName) {
 541         Data.accountFilter.setValue(accName);
 542         mViewPager.setCurrentItem(1, true);
 543     }
 544     private void showTransactionsFragment(LedgerAccount account) {
 545         showTransactionsFragment((account == null) ? (String) null : account.getName());
 546     }
 547     public void showAccountTransactions(LedgerAccount account) {
 548         mBackMeansToAccountList = true;
 549         showTransactionsFragment(account);
 550     }
 551     @Override
 552     public void onBackPressed() {
 553         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 554         if (drawer.isDrawerOpen(GravityCompat.START)) {
 555             drawer.closeDrawer(GravityCompat.START);
 556         }
 557         else {
 558             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 559                 Data.accountFilter.setValue(null);
 560                 showAccountSummaryFragment();
 561                 mBackMeansToAccountList = false;
 562             }
 563             else {
 564                 debug("fragments", String.format("manager stack: %d",
 565                         fragmentManager.getBackStackEntryCount()));
 566
 567                 super.onBackPressed();
 568             }
 569         }
 570     }
 571     public void updateLastUpdateTextFromDB() {
 572         final MobileLedgerProfile profile = Data.profile.get();
 573         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 574
 575         debug("transactions", String.format("Last update = %d", last_update));
 576         if (last_update == 0) {
 577             Data.lastUpdateDate.postValue(null);
 578         }
 579         else {
 580             Data.lastUpdateDate.postValue(new Date(last_update));
 581         }
 582     }
 583     public void scheduleTransactionListRetrieval() {
 584         if (Data.profile.get() == null) return;
 585
 586         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 587
 588         retrieveTransactionsTask.execute();
 589     }
 590     public void onStopTransactionRefreshClick(View view) {
 591         debug("interactive", "Cancelling transactions refresh");
 592         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 593         bTransactionListCancelDownload.setEnabled(false);
 594     }
 595     public void onRetrieveDone(String error) {
 596         progressLayout.setVisibility(View.GONE);
 597
 598         if (error == null) {
 599             updateLastUpdateTextFromDB();
 600
 601             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 602             TransactionListViewModel.scheduleTransactionListReload();
 603         }
 604         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 605     }
 606     public void onRetrieveStart() {
 607         bTransactionListCancelDownload.setEnabled(true);
 608         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 609         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 610         progressBar.setIndeterminate(true);
 611         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 612         else progressBar.setProgress(0);
 613         progressLayout.setVisibility(View.VISIBLE);
 614     }
 615     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 616         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 617             (progress.getTotal() == 0))
 618         {
 619             progressBar.setIndeterminate(true);
 620         }
 621         else {
 622             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 623                 progressBar.setMin(0);
 624             }
 625             progressBar.setMax(progress.getTotal());
 626             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 627                 progressBar.setProgress(progress.getProgress(), true);
 628             }
 629             else progressBar.setProgress(progress.getProgress());
 630             progressBar.setIndeterminate(false);
 631         }
 632     }
 633     public void fabShouldShow() {
 634         MobileLedgerProfile profile = Data.profile.get();
 635         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 636     }
 637     public void navProfilesHeadClicked(View view) {
 638         if (profileListExpanded) {
 639             collapseProfileList();
 640         }
 641         else {
 642             expandProfileList();
 643         }
 644     }
 645     private void expandProfileList() {
 646         profileListExpanded = true;
 647
 648
 649         profileListContainer.setVisibility(View.VISIBLE);
 650         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 651         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 652         profileListHeadMore.setVisibility(View.VISIBLE);
 653         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 654         findViewById(R.id.nav_profile_list).setMinimumHeight(
 655                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 656                        Data.profiles.size()));
 657     }
 658     private void collapseProfileList() {
 659         boolean wasExpanded = profileListExpanded;
 660         profileListExpanded = false;
 661
 662         if (wasExpanded) {
 663             final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 664             animation.setAnimationListener(new Animation.AnimationListener() {
 665                 @Override
 666                 public void onAnimationStart(Animation animation) {
 667
 668                 }
 669                 @Override
 670                 public void onAnimationEnd(Animation animation) {
 671                     profileListContainer.setVisibility(View.GONE);
 672                 }
 673                 @Override
 674                 public void onAnimationRepeat(Animation animation) {
 675
 676                 }
 677             });
 678             mProfileListAdapter.stopEditingProfiles();
 679
 680             profileListContainer.startAnimation(animation);
 681             profileListHeadArrow.setRotation(0f);
 682             profileListHeadArrow
 683                     .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 684             final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 685             moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 686                 @Override
 687                 public void onAnimationStart(Animation animation) {
 688                 }
 689                 @Override
 690                 public void onAnimationEnd(Animation animation) {
 691                     profileListHeadMore.setVisibility(View.GONE);
 692                 }
 693                 @Override
 694                 public void onAnimationRepeat(Animation animation) {
 695                 }
 696             });
 697             profileListHeadMore.startAnimation(moreAnimation);
 698         }
 699         else {
 700             profileListContainer.setVisibility(View.GONE);
 701             profileListHeadArrow.setRotation(0f);
 702             profileListHeadMore.setVisibility(View.GONE);
 703         }
 704     }
 705     public void onAccountSummaryRowViewClicked(View view) {
 706         ViewGroup row;
 707         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 708         else row = (ViewGroup) view.getParent();
 709
 710         LedgerAccount acc = (LedgerAccount) row.getTag();
 711         switch (view.getId()) {
 712             case R.id.account_row_acc_name:
 713             case R.id.account_expander:
 714             case R.id.account_expander_container:
 715                 debug("accounts", "Account expander clicked");
 716                 if (!acc.hasSubAccounts()) return;
 717
 718                 boolean wasExpanded = acc.isExpanded();
 719
 720                 View arrow = row.findViewById(R.id.account_expander_container);
 721
 722                 arrow.clearAnimation();
 723                 ViewPropertyAnimator animator = arrow.animate();
 724
 725                 acc.toggleExpanded();
 726                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 727                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 728                         });
 729
 730                 if (wasExpanded) {
 731                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 732                     arrow.setRotation(0);
 733                     animator.rotationBy(180);
 734
 735                     // removing all child accounts from the view
 736                     int start = -1, count = 0;
 737                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 738                         for (int i = 0; i < Data.accounts.size(); i++) {
 739                             if (acc.isParentOf(Data.accounts.get(i))) {
 740 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 741 //                                        Data.accounts.get(i).getName(), i));
 742                                 if (start == -1) {
 743                                     start = i;
 744                                 }
 745                                 count++;
 746                             }
 747                             else {
 748                                 if (start != -1) {
 749 //                                    debug("accounts",
 750 //                                            String.format("Found a non-child '%s' at position %d",
 751 //                                                    Data.accounts.get(i).getName(), i));
 752                                     break;
 753                                 }
 754                             }
 755                         }
 756
 757                         if (start != -1) {
 758                             for (int j = 0; j < count; j++) {
 759 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 760 //                                        Data.accounts.get(start).getName()));
 761                                 Data.accounts.removeQuietly(start);
 762                             }
 763
 764                             mAccountSummaryFragment.modelAdapter
 765                                     .notifyItemRangeRemoved(start, count);
 766                         }
 767                     }
 768                 }
 769                 else {
 770                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 771                     arrow.setRotation(180);
 772                     animator.rotationBy(-180);
 773                     List<LedgerAccount> children =
 774                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 775                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 776                         int parentPos = Data.accounts.indexOf(acc);
 777                         if (parentPos != -1) {
 778                             // may have disappeared in a concurrent refresh operation
 779                             Data.accounts.addAllQuietly(parentPos + 1, children);
 780                             mAccountSummaryFragment.modelAdapter
 781                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 782                         }
 783                     }
 784                 }
 785                 break;
 786             case R.id.account_row_acc_amounts:
 787                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 788                     acc.toggleAmountsExpanded();
 789                     DbOpQueue
 790                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 791                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 792                                                  Data.profile.get().getUuid()
 793                                     });
 794                     Data.accounts.triggerItemChangedNotification(acc);
 795                 }
 796                 break;
 797         }
 798     }
 799
 800     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 801
 802         public SectionsPagerAdapter(FragmentManager fm) {
 803             super(fm);
 804         }
 805
 806         @NotNull
 807         @Override
 808         public Fragment getItem(int position) {
 809             debug("main", String.format("Switching to fragment %d", position));
 810             switch (position) {
 811                 case 0:
 812 //                    debug("flow", "Creating account summary fragment");
 813                     return mAccountSummaryFragment = new AccountSummaryFragment();
 814                 case 1:
 815                     return new TransactionListFragment();
 816                 default:
 817                     throw new IllegalStateException(
 818                             String.format("Unexpected fragment index: " + "%d", position));
 819             }
 820         }
 821
 822         @Override
 823         public int getCount() {
 824             return 2;
 825         }
 826     }
 827 }