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         LinearLayout profileListHeadMoreAndCancel =
 162                 findViewById(R.id.nav_profile_list_head_buttons);
 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         if (profileObserver == null) {
 179             profileObserver = (o, arg) -> onProfileChanged(arg);
 180             Data.profile.addObserver(profileObserver);
 181         }
 182
 183         if (profilesObserver == null) {
 184             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 185             Data.profiles.addObserver(profilesObserver);
 186         }
 187
 188         if (barDrawerToggle == null) {
 189             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 190                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 191             drawer.addDrawerListener(barDrawerToggle);
 192         }
 193         barDrawerToggle.syncState();
 194
 195         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 196
 197         try {
 198             PackageInfo pi =
 199                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 200             ver.setText(pi.versionName);
 201         }
 202         catch (Exception e) {
 203             e.printStackTrace();
 204         }
 205
 206         if (progressBar == null)
 207             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 208         if (progressLayout == null) throw new RuntimeException(
 209                 "Can't get hold on the transaction value progress bar layout");
 210
 211         markDrawerItemCurrent(R.id.nav_account_summary);
 212
 213         mViewPager.setAdapter(mSectionsPagerAdapter);
 214
 215         if (pageChangeListener == null) {
 216             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 217                 @Override
 218                 public void onPageSelected(int position) {
 219                     switch (position) {
 220                         case 0:
 221                             markDrawerItemCurrent(R.id.nav_account_summary);
 222                             break;
 223                         case 1:
 224                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 225                             break;
 226                         default:
 227                             Log.e("MainActivity",
 228                                     String.format("Unexpected page index %d", position));
 229                     }
 230
 231                     super.onPageSelected(position);
 232                 }
 233             };
 234             mViewPager.addOnPageChangeListener(pageChangeListener);
 235         }
 236
 237         mCurrentPage = 0;
 238         if (savedInstanceState != null) {
 239             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 240             if (currentPage != -1) {
 241                 mCurrentPage = currentPage;
 242             }
 243             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 244         }
 245         else mAccountFilter = null;
 246
 247         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 248
 249         findViewById(R.id.btn_no_profiles_add)
 250                 .setOnClickListener(v -> startEditProfileActivity(null));
 251
 252         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 253
 254         findViewById(R.id.nav_new_profile_button)
 255                 .setOnClickListener(v -> startEditProfileActivity(null));
 256
 257         RecyclerView root = findViewById(R.id.nav_profile_list);
 258         if (root == null)
 259             throw new RuntimeException("Can't get hold on the transaction value view");
 260
 261         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 262         root.setAdapter(mProfileListAdapter);
 263
 264         if (editingProfilesObserver == null) {
 265             editingProfilesObserver = (o, arg) -> {
 266                 if (mProfileListAdapter.isEditingProfiles()) {
 267                     profileListHeadArrow.clearAnimation();
 268                     profileListHeadArrow.setVisibility(View.GONE);
 269                     profileListHeadMore.setVisibility(View.GONE);
 270                     profileListHeadMore
 271                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 272                     profileListHeadCancel.setVisibility(View.VISIBLE);
 273                     profileListHeadCancel
 274                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 275                 }
 276                 else {
 277                     profileListHeadArrow.setRotation(180f);
 278                     profileListHeadArrow.setVisibility(View.VISIBLE);
 279                     profileListHeadCancel.setVisibility(View.GONE);
 280                     profileListHeadCancel
 281                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 282                     profileListHeadMore.setVisibility(View.GONE);
 283                     if (profileListExpanded) {
 284                         profileListHeadMore.setVisibility(View.VISIBLE);
 285                         profileListHeadMore
 286                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 287                     }
 288                     else profileListHeadMore.setVisibility(View.GONE);
 289                 }
 290             };
 291             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 292         }
 293
 294         LinearLayoutManager llm = new LinearLayoutManager(this);
 295
 296         llm.setOrientation(RecyclerView.VERTICAL);
 297         root.setLayoutManager(llm);
 298
 299         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 300         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 301         profileListHeadMoreAndCancel
 302                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 303
 304         if (drawerListener == null) {
 305             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 306                 @Override
 307                 public void onDrawerClosed(View drawerView) {
 308                     super.onDrawerClosed(drawerView);
 309                     collapseProfileList();
 310                 }
 311             };
 312             drawer.addDrawerListener(drawerListener);
 313         }
 314
 315         findViewById(R.id.nav_profile_list_head_layout)
 316                 .setOnClickListener(this::navProfilesHeadClicked);
 317         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 318         boolean initialStart = Data.profile.get() == null;
 319         setupProfile();
 320         if (!initialStart) onProfileChanged(null);
 321
 322         updateLastUpdateTextFromDB();
 323     }
 324     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 325         long now = new Date().getTime();
 326         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 327             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 328             else debug("db",
 329                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 330                             lastUpdate.getTime() / 1000f, now / 1000f));
 331
 332             scheduleTransactionListRetrieval();
 333         }
 334     }
 335     private void createShortcuts() {
 336         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return;
 337
 338         List<ShortcutInfo> shortcuts = new ArrayList<>();
 339         try (LockHolder ignored = Data.profiles.lockForReading()) {
 340             for (int i = 0; i < Data.profiles.size(); i++) {
 341                 MobileLedgerProfile p = Data.profiles.get(i);
 342                 if (!p.isPostingPermitted()) continue;
 343
 344                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 345                         .setShortLabel(p.getName())
 346                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 347                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 348                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 349                         .setRank(i).build();
 350                 shortcuts.add(si);
 351             }
 352         }
 353         ShortcutManager sm = getSystemService(ShortcutManager.class);
 354         sm.setDynamicShortcuts(shortcuts);
 355     }
 356     private void onProfileListChanged(Object arg) {
 357         findViewById(R.id.nav_profile_list).setMinimumHeight(
 358                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 359                        Data.profiles.size()));
 360
 361         debug("profiles", "profile list changed");
 362         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 363         else mProfileListAdapter.notifyItemChanged((int) arg);
 364
 365         createShortcuts();
 366     }
 367     private void onProfileChanged(Object arg) {
 368         MobileLedgerProfile profile = Data.profile.get();
 369         MainActivity.this.runOnUiThread(() -> {
 370
 371             boolean haveProfile = profile != null;
 372             findViewById(R.id.no_profiles_layout)
 373                     .setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 374             findViewById(R.id.pager_layout)
 375                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 376
 377             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 378             else MainActivity.this.setTitle(profile.getName());
 379             MainActivity.this.updateLastUpdateTextFromDB();
 380             int old_index = -1;
 381             int new_index = -1;
 382             if (arg != null) {
 383                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 384                 old_index = Data.getProfileIndex(old);
 385                 new_index = Data.getProfileIndex(profile);
 386             }
 387
 388             if ((old_index != -1) && (new_index != -1)) {
 389                 mProfileListAdapter.notifyItemChanged(old_index);
 390                 mProfileListAdapter.notifyItemChanged(new_index);
 391             }
 392             else mProfileListAdapter.notifyDataSetChanged();
 393
 394             MainActivity.this.collapseProfileList();
 395
 396             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 397             if (newProfileTheme != Colors.profileThemeId) {
 398                 debug("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 399                         newProfileTheme));
 400                 MainActivity.this.profileThemeChanged();
 401                 Colors.profileThemeId = newProfileTheme;
 402                 // profileThemeChanged would restart the activity, so no need to reload the
 403                 // data sets below
 404                 return;
 405             }
 406             drawer.closeDrawers();
 407
 408             Data.transactions.clear();
 409             debug("transactions", "requesting list reload");
 410             TransactionListViewModel.scheduleTransactionListReload();
 411
 412             Data.accounts.clear();
 413             AccountSummaryViewModel.scheduleAccountListReload();
 414
 415             if (profile == null) {
 416                 mToolbar.setSubtitle(null);
 417                 fab.hide();
 418             }
 419             else {
 420                 if (profile.isPostingPermitted()) {
 421                     mToolbar.setSubtitle(null);
 422                     fab.show();
 423                 }
 424                 else {
 425                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 426                     fab.hide();
 427                 }
 428             }
 429
 430             updateLastUpdateTextFromDB();
 431         });
 432     }
 433     private void updateLastUpdateDisplay(Date newValue) {
 434         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 435         TextView v = findViewById(R.id.transactions_last_update);
 436         if (newValue == null) {
 437             l.setVisibility(View.INVISIBLE);
 438             debug("main", "no last update date :(");
 439         }
 440         else {
 441             final String text = DateFormat.getDateTimeInstance().format(newValue);
 442             v.setText(text);
 443             l.setVisibility(View.VISIBLE);
 444             debug("main", String.format("Date formatted: %s", text));
 445         }
 446
 447         scheduleDataRetrievalIfStale(newValue);
 448     }
 449     @Override
 450     public void finish() {
 451         if (profilesObserver != null) {
 452             Data.profiles.deleteObserver(profilesObserver);
 453             profilesObserver = null;
 454         }
 455
 456         if (profileObserver != null) {
 457             Data.profile.deleteObserver(profileObserver);
 458             profileObserver = null;
 459         }
 460
 461         super.finish();
 462     }
 463     private void profileThemeChanged() {
 464         setupProfileColors();
 465
 466         Bundle bundle = new Bundle();
 467         onSaveInstanceState(bundle);
 468         // restart activity to reflect theme change
 469         finish();
 470         Intent intent = new Intent(this, this.getClass());
 471         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 472         startActivity(intent);
 473     }
 474     public void startEditProfileActivity(MobileLedgerProfile profile) {
 475         Intent intent = new Intent(this, ProfileDetailActivity.class);
 476         Bundle args = new Bundle();
 477         if (profile != null) {
 478             int index = Data.getProfileIndex(profile);
 479             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 480         }
 481         intent.putExtras(args);
 482         startActivity(intent, args);
 483     }
 484     private void setupProfile() {
 485         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 486         MobileLedgerProfile profile;
 487
 488         profile = Data.getProfile(profileUUID);
 489
 490         if (Data.profiles.isEmpty()) {
 491             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 492             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 493             return;
 494         }
 495
 496         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 497         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 498
 499         if (profile == null) profile = Data.profiles.get(0);
 500
 501         if (profile == null) throw new AssertionError("profile must have a value");
 502
 503         Data.setCurrentProfile(profile);
 504     }
 505     public void fabNewTransactionClicked(View view) {
 506         Intent intent = new Intent(this, NewTransactionActivity.class);
 507         startActivity(intent);
 508         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 509     }
 510     public void navSettingsClicked(View view) {
 511         Intent intent = new Intent(this, SettingsActivity.class);
 512         startActivity(intent);
 513         drawer.closeDrawers();
 514     }
 515     public void markDrawerItemCurrent(int id) {
 516         TextView item = drawer.findViewById(id);
 517         item.setBackgroundColor(Colors.tableRowDarkBG);
 518
 519         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 520         for (int i = 0; i < actions.getChildCount(); i++) {
 521             View view = actions.getChildAt(i);
 522             if (view.getId() != id) {
 523                 view.setBackgroundColor(Color.TRANSPARENT);
 524             }
 525         }
 526     }
 527     public void onAccountSummaryClicked(View view) {
 528         drawer.closeDrawers();
 529
 530         showAccountSummaryFragment();
 531     }
 532     private void showAccountSummaryFragment() {
 533         mViewPager.setCurrentItem(0, true);
 534         Data.accountFilter.setValue(null);
 535     }
 536     public void onLatestTransactionsClicked(View view) {
 537         drawer.closeDrawers();
 538
 539         showTransactionsFragment((String) null);
 540     }
 541     private void showTransactionsFragment(String accName) {
 542         Data.accountFilter.setValue(accName);
 543         mViewPager.setCurrentItem(1, true);
 544     }
 545     private void showTransactionsFragment(LedgerAccount account) {
 546         showTransactionsFragment((account == null) ? null : account.getName());
 547     }
 548     public void showAccountTransactions(LedgerAccount account) {
 549         mBackMeansToAccountList = true;
 550         showTransactionsFragment(account);
 551     }
 552     @Override
 553     public void onBackPressed() {
 554         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 555         if (drawer.isDrawerOpen(GravityCompat.START)) {
 556             drawer.closeDrawer(GravityCompat.START);
 557         }
 558         else {
 559             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 560                 Data.accountFilter.setValue(null);
 561                 showAccountSummaryFragment();
 562                 mBackMeansToAccountList = false;
 563             }
 564             else {
 565                 debug("fragments", String.format("manager stack: %d",
 566                         fragmentManager.getBackStackEntryCount()));
 567
 568                 super.onBackPressed();
 569             }
 570         }
 571     }
 572     public void updateLastUpdateTextFromDB() {
 573         final MobileLedgerProfile profile = Data.profile.get();
 574         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 575
 576         debug("transactions", String.format("Last update = %d", last_update));
 577         if (last_update == 0) {
 578             Data.lastUpdateDate.postValue(null);
 579         }
 580         else {
 581             Data.lastUpdateDate.postValue(new Date(last_update));
 582         }
 583     }
 584     public void scheduleTransactionListRetrieval() {
 585         if (Data.profile.get() == null) return;
 586
 587         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 588
 589         retrieveTransactionsTask.execute();
 590     }
 591     public void onStopTransactionRefreshClick(View view) {
 592         debug("interactive", "Cancelling transactions refresh");
 593         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 594         bTransactionListCancelDownload.setEnabled(false);
 595     }
 596     public void onRetrieveDone(String error) {
 597         progressLayout.setVisibility(View.GONE);
 598
 599         if (error == null) {
 600             updateLastUpdateTextFromDB();
 601
 602             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 603             TransactionListViewModel.scheduleTransactionListReload();
 604         }
 605         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 606     }
 607     public void onRetrieveStart() {
 608         bTransactionListCancelDownload.setEnabled(true);
 609         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 610         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 611         progressBar.setIndeterminate(true);
 612         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 613         else progressBar.setProgress(0);
 614         progressLayout.setVisibility(View.VISIBLE);
 615     }
 616     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 617         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 618             (progress.getTotal() == 0))
 619         {
 620             progressBar.setIndeterminate(true);
 621         }
 622         else {
 623             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 624                 progressBar.setMin(0);
 625             }
 626             progressBar.setMax(progress.getTotal());
 627             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 628                 progressBar.setProgress(progress.getProgress(), true);
 629             }
 630             else progressBar.setProgress(progress.getProgress());
 631             progressBar.setIndeterminate(false);
 632         }
 633     }
 634     public void fabShouldShow() {
 635         MobileLedgerProfile profile = Data.profile.get();
 636         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 637     }
 638     public void navProfilesHeadClicked(View view) {
 639         if (profileListExpanded) {
 640             collapseProfileList();
 641         }
 642         else {
 643             expandProfileList();
 644         }
 645     }
 646     private void expandProfileList() {
 647         profileListExpanded = true;
 648
 649
 650         profileListContainer.setVisibility(View.VISIBLE);
 651         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 652         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 653         profileListHeadMore.setVisibility(View.VISIBLE);
 654         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 655         findViewById(R.id.nav_profile_list).setMinimumHeight(
 656                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 657                        Data.profiles.size()));
 658     }
 659     private void collapseProfileList() {
 660         boolean wasExpanded = profileListExpanded;
 661         profileListExpanded = false;
 662
 663         if (wasExpanded) {
 664             final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 665             animation.setAnimationListener(new Animation.AnimationListener() {
 666                 @Override
 667                 public void onAnimationStart(Animation animation) {
 668
 669                 }
 670                 @Override
 671                 public void onAnimationEnd(Animation animation) {
 672                     profileListContainer.setVisibility(View.GONE);
 673                 }
 674                 @Override
 675                 public void onAnimationRepeat(Animation animation) {
 676
 677                 }
 678             });
 679             mProfileListAdapter.stopEditingProfiles();
 680
 681             profileListContainer.startAnimation(animation);
 682             profileListHeadArrow.setRotation(0f);
 683             profileListHeadArrow
 684                     .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 685             final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 686             moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 687                 @Override
 688                 public void onAnimationStart(Animation animation) {
 689                 }
 690                 @Override
 691                 public void onAnimationEnd(Animation animation) {
 692                     profileListHeadMore.setVisibility(View.GONE);
 693                 }
 694                 @Override
 695                 public void onAnimationRepeat(Animation animation) {
 696                 }
 697             });
 698             profileListHeadMore.startAnimation(moreAnimation);
 699         }
 700         else {
 701             profileListContainer.setVisibility(View.GONE);
 702             profileListHeadArrow.setRotation(0f);
 703             profileListHeadMore.setVisibility(View.GONE);
 704         }
 705     }
 706     public void onAccountSummaryRowViewClicked(View view) {
 707         ViewGroup row;
 708         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 709         else row = (ViewGroup) view.getParent();
 710
 711         LedgerAccount acc = (LedgerAccount) row.getTag();
 712         switch (view.getId()) {
 713             case R.id.account_row_acc_name:
 714             case R.id.account_expander:
 715             case R.id.account_expander_container:
 716                 debug("accounts", "Account expander clicked");
 717                 if (!acc.hasSubAccounts()) return;
 718
 719                 boolean wasExpanded = acc.isExpanded();
 720
 721                 View arrow = row.findViewById(R.id.account_expander_container);
 722
 723                 arrow.clearAnimation();
 724                 ViewPropertyAnimator animator = arrow.animate();
 725
 726                 acc.toggleExpanded();
 727                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 728                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 729                         });
 730
 731                 if (wasExpanded) {
 732                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 733                     arrow.setRotation(0);
 734                     animator.rotationBy(180);
 735
 736                     // removing all child accounts from the view
 737                     int start = -1, count = 0;
 738                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 739                         for (int i = 0; i < Data.accounts.size(); i++) {
 740                             if (acc.isParentOf(Data.accounts.get(i))) {
 741 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 742 //                                        Data.accounts.get(i).getName(), i));
 743                                 if (start == -1) {
 744                                     start = i;
 745                                 }
 746                                 count++;
 747                             }
 748                             else {
 749                                 if (start != -1) {
 750 //                                    debug("accounts",
 751 //                                            String.format("Found a non-child '%s' at position %d",
 752 //                                                    Data.accounts.get(i).getName(), i));
 753                                     break;
 754                                 }
 755                             }
 756                         }
 757
 758                         if (start != -1) {
 759                             for (int j = 0; j < count; j++) {
 760 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 761 //                                        Data.accounts.get(start).getName()));
 762                                 Data.accounts.removeQuietly(start);
 763                             }
 764
 765                             mAccountSummaryFragment.modelAdapter
 766                                     .notifyItemRangeRemoved(start, count);
 767                         }
 768                     }
 769                 }
 770                 else {
 771                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 772                     arrow.setRotation(180);
 773                     animator.rotationBy(-180);
 774                     List<LedgerAccount> children =
 775                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 776                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 777                         int parentPos = Data.accounts.indexOf(acc);
 778                         if (parentPos != -1) {
 779                             // may have disappeared in a concurrent refresh operation
 780                             Data.accounts.addAllQuietly(parentPos + 1, children);
 781                             mAccountSummaryFragment.modelAdapter
 782                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 783                         }
 784                     }
 785                 }
 786                 break;
 787             case R.id.account_row_acc_amounts:
 788                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 789                     acc.toggleAmountsExpanded();
 790                     DbOpQueue
 791                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 792                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 793                                                  Data.profile.get().getUuid()
 794                                     });
 795                     Data.accounts.triggerItemChangedNotification(acc);
 796                 }
 797                 break;
 798         }
 799     }
 800
 801     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 802
 803         SectionsPagerAdapter(FragmentManager fm) {
 804             super(fm);
 805         }
 806
 807         @NotNull
 808         @Override
 809         public Fragment getItem(int position) {
 810             debug("main", String.format("Switching to fragment %d", position));
 811             switch (position) {
 812                 case 0:
 813 //                    debug("flow", "Creating account summary fragment");
 814                     return mAccountSummaryFragment = new AccountSummaryFragment();
 815                 case 1:
 816                     return new TransactionListFragment();
 817                 default:
 818                     throw new IllegalStateException(
 819                             String.format("Unexpected fragment index: " + "%d", position));
 820             }
 821         }
 822
 823         @Override
 824         public int getCount() {
 825             return 2;
 826         }
 827     }
 828 }