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 LinearLayout profileListHeadMoreAndCancel;
  92     private FragmentManager fragmentManager;
  93     private TextView tvLastUpdate;
  94     private RetrieveTransactionsTask retrieveTransactionsTask;
  95     private View bTransactionListCancelDownload;
  96     private ProgressBar progressBar;
  97     private LinearLayout progressLayout;
  98     private SectionsPagerAdapter mSectionsPagerAdapter;
  99     private ViewPager mViewPager;
 100     private FloatingActionButton fab;
 101     private boolean profileModificationEnabled = false;
 102     private boolean profileListExpanded = false;
 103     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 104     private int mCurrentPage;
 105     private String mAccountFilter;
 106     private boolean mBackMeansToAccountList = false;
 107     private Observer profileObserver;
 108     private Observer profilesObserver;
 109     private Toolbar mToolbar;
 110     private DrawerLayout.SimpleDrawerListener drawerListener;
 111     private ActionBarDrawerToggle barDrawerToggle;
 112     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 113     private Observer editingProfilesObserver;
 114     @Override
 115     protected void onStart() {
 116         super.onStart();
 117
 118         debug("flow", "MainActivity.onStart()");
 119         mViewPager.setCurrentItem(mCurrentPage, false);
 120         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 121         else Data.accountFilter.setValue(null);
 122
 123     }
 124     @Override
 125     protected void onSaveInstanceState(Bundle outState) {
 126         super.onSaveInstanceState(outState);
 127         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 128         if (mAccountFilter != null)
 129             outState.putString(STATE_ACC_FILTER, mAccountFilter);
 130     }
 131     @Override
 132     protected void onDestroy() {
 133         mSectionsPagerAdapter = null;
 134         Data.profile.deleteObserver(profileObserver);
 135         profileObserver = null;
 136         Data.profiles.deleteObserver(profilesObserver);
 137         profilesObserver = null;
 138         RecyclerView root = findViewById(R.id.nav_profile_list);
 139         if (root != null) root.setAdapter(null);
 140         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 141         drawerListener = null;
 142         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 143         barDrawerToggle = null;
 144         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 145         pageChangeListener = null;
 146         if (mProfileListAdapter != null)
 147             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 148         editingProfilesObserver = null;
 149         super.onDestroy();
 150     }
 151     @Override
 152     protected void onCreate(Bundle savedInstanceState) {
 153         super.onCreate(savedInstanceState);
 154         debug("flow", "MainActivity.onCreate()");
 155         int profileColor = Data.retrieveCurrentThemeIdFromDb();
 156         Colors.setupTheme(this, profileColor);
 157         Colors.profileThemeId = profileColor;
 158         setContentView(R.layout.activity_main);
 159
 160         fab = findViewById(R.id.btn_add_transaction);
 161         profileListContainer = findViewById(R.id.nav_profile_list_container);
 162         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 163         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 164         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 165         profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
 166         drawer = findViewById(R.id.drawer_layout);
 167         tvLastUpdate = findViewById(R.id.transactions_last_update);
 168         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 169         progressBar = findViewById(R.id.transaction_list_progress_bar);
 170         progressLayout = findViewById(R.id.transaction_progress_layout);
 171         fragmentManager = getSupportFragmentManager();
 172         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 173         mViewPager = findViewById(R.id.root_frame);
 174
 175         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 176         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 177
 178
 179         mToolbar = findViewById(R.id.toolbar);
 180         setSupportActionBar(mToolbar);
 181
 182         if (profileObserver == null) {
 183             profileObserver = (o, arg) -> onProfileChanged(arg);
 184             Data.profile.addObserver(profileObserver);
 185         }
 186
 187         if (profilesObserver == null) {
 188             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 189             Data.profiles.addObserver(profilesObserver);
 190         }
 191
 192         if (barDrawerToggle == null) {
 193             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 194                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 195             drawer.addDrawerListener(barDrawerToggle);
 196         }
 197         barDrawerToggle.syncState();
 198
 199         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 200
 201         try {
 202             PackageInfo pi =
 203                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 204             ver.setText(pi.versionName);
 205         }
 206         catch (Exception e) {
 207             e.printStackTrace();
 208         }
 209
 210         if (progressBar == null)
 211             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 212         if (progressLayout == null) throw new RuntimeException(
 213                 "Can't get hold on the transaction value progress bar layout");
 214
 215         markDrawerItemCurrent(R.id.nav_account_summary);
 216
 217         mViewPager.setAdapter(mSectionsPagerAdapter);
 218
 219         if (pageChangeListener == null) {
 220             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 221                 @Override
 222                 public void onPageSelected(int position) {
 223                     switch (position) {
 224                         case 0:
 225                             markDrawerItemCurrent(R.id.nav_account_summary);
 226                             break;
 227                         case 1:
 228                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 229                             break;
 230                         default:
 231                             Log.e("MainActivity",
 232                                     String.format("Unexpected page index %d", position));
 233                     }
 234
 235                     super.onPageSelected(position);
 236                 }
 237             };
 238             mViewPager.addOnPageChangeListener(pageChangeListener);
 239         }
 240
 241         mCurrentPage = 0;
 242         if (savedInstanceState != null) {
 243             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 244             if (currentPage != -1) {
 245                 mCurrentPage = currentPage;
 246             }
 247             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 248         }
 249         else mAccountFilter = null;
 250
 251         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 252
 253         findViewById(R.id.btn_no_profiles_add)
 254                 .setOnClickListener(v -> startEditProfileActivity(null));
 255
 256         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 257
 258         findViewById(R.id.nav_new_profile_button)
 259                 .setOnClickListener(v -> startEditProfileActivity(null));
 260
 261         RecyclerView root = findViewById(R.id.nav_profile_list);
 262         if (root == null)
 263             throw new RuntimeException("Can't get hold on the transaction value view");
 264
 265         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 266         root.setAdapter(mProfileListAdapter);
 267
 268         if (editingProfilesObserver == null) {
 269             editingProfilesObserver = (o, arg) -> {
 270                 if (mProfileListAdapter.isEditingProfiles()) {
 271                     profileListHeadArrow.clearAnimation();
 272                     profileListHeadArrow.setVisibility(View.GONE);
 273                     profileListHeadMore.setVisibility(View.GONE);
 274                     profileListHeadMore
 275                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 276                     profileListHeadCancel.setVisibility(View.VISIBLE);
 277                     profileListHeadCancel
 278                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 279                 }
 280                 else {
 281                     profileListHeadArrow.setRotation(180f);
 282                     profileListHeadArrow.setVisibility(View.VISIBLE);
 283                     profileListHeadCancel.setVisibility(View.GONE);
 284                     profileListHeadCancel
 285                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 286                     profileListHeadMore.setVisibility(View.GONE);
 287                     if (profileListExpanded) {
 288                         profileListHeadMore.setVisibility(View.VISIBLE);
 289                         profileListHeadMore
 290                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 291                     }
 292                     else profileListHeadMore.setVisibility(View.GONE);
 293                 }
 294             };
 295             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 296         }
 297
 298         LinearLayoutManager llm = new LinearLayoutManager(this);
 299
 300         llm.setOrientation(RecyclerView.VERTICAL);
 301         root.setLayoutManager(llm);
 302
 303         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 304         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 305         profileListHeadMoreAndCancel
 306                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 307
 308         if (drawerListener == null) {
 309             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 310                 @Override
 311                 public void onDrawerClosed(View drawerView) {
 312                     super.onDrawerClosed(drawerView);
 313                     collapseProfileList();
 314                 }
 315             };
 316             drawer.addDrawerListener(drawerListener);
 317         }
 318
 319         findViewById(R.id.nav_profile_list_head_layout)
 320                 .setOnClickListener(this::navProfilesHeadClicked);
 321         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 322         boolean initialStart = Data.profile.get() == null;
 323         setupProfile();
 324         if (!initialStart) onProfileChanged(null);
 325
 326         updateLastUpdateTextFromDB();
 327     }
 328     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 329         long now = new Date().getTime();
 330         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 331             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 332             else debug("db",
 333                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 334                             lastUpdate.getTime() / 1000f, now / 1000f));
 335
 336             scheduleTransactionListRetrieval();
 337         }
 338     }
 339     private void createShortcuts() {
 340         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return;
 341
 342         List<ShortcutInfo> shortcuts = new ArrayList<>();
 343         try (LockHolder lh = Data.profiles.lockForReading()) {
 344             for (int i = 0; i < Data.profiles.size(); i++) {
 345                 MobileLedgerProfile p = Data.profiles.get(i);
 346                 if (!p.isPostingPermitted()) continue;
 347
 348                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 349                         .setShortLabel(p.getName())
 350                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 351                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 352                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 353                         .setRank(i).build();
 354                 shortcuts.add(si);
 355             }
 356         }
 357         ShortcutManager sm = getSystemService(ShortcutManager.class);
 358         sm.setDynamicShortcuts(shortcuts);
 359     }
 360     private void onProfileListChanged(Object arg) {
 361         findViewById(R.id.nav_profile_list).setMinimumHeight(
 362                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 363                        Data.profiles.size()));
 364
 365         debug("profiles", "profile list changed");
 366         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 367         else mProfileListAdapter.notifyItemChanged((int) arg);
 368
 369         createShortcuts();
 370     }
 371     private void onProfileChanged(Object arg) {
 372         MobileLedgerProfile profile = Data.profile.get();
 373         MainActivity.this.runOnUiThread(() -> {
 374
 375             boolean haveProfile = profile != null;
 376             findViewById(R.id.no_profiles_layout)
 377                     .setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 378             findViewById(R.id.pager_layout)
 379                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 380
 381             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 382             else MainActivity.this.setTitle(profile.getName());
 383             MainActivity.this.updateLastUpdateTextFromDB();
 384             int old_index = -1;
 385             int new_index = -1;
 386             if (arg != null) {
 387                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 388                 old_index = Data.getProfileIndex(old);
 389                 new_index = Data.getProfileIndex(profile);
 390             }
 391
 392             if ((old_index != -1) && (new_index != -1)) {
 393                 mProfileListAdapter.notifyItemChanged(old_index);
 394                 mProfileListAdapter.notifyItemChanged(new_index);
 395             }
 396             else mProfileListAdapter.notifyDataSetChanged();
 397
 398             MainActivity.this.collapseProfileList();
 399
 400             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 401             if (newProfileTheme != Colors.profileThemeId) {
 402                 debug("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 403                         newProfileTheme));
 404                 MainActivity.this.profileThemeChanged();
 405                 Colors.profileThemeId = newProfileTheme;
 406                 // profileThemeChanged would restart the activity, so no need to reload the
 407                 // data sets below
 408                 return;
 409             }
 410             drawer.closeDrawers();
 411
 412             Data.transactions.clear();
 413             debug("transactions", "requesting list reload");
 414             TransactionListViewModel.scheduleTransactionListReload();
 415
 416             Data.accounts.clear();
 417             AccountSummaryViewModel.scheduleAccountListReload();
 418
 419             if (profile == null) {
 420                 mToolbar.setSubtitle(null);
 421                 fab.hide();
 422             }
 423             else {
 424                 if (profile.isPostingPermitted()) {
 425                     mToolbar.setSubtitle(null);
 426                     fab.show();
 427                 }
 428                 else {
 429                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 430                     fab.hide();
 431                 }
 432             }
 433
 434             updateLastUpdateTextFromDB();
 435         });
 436     }
 437     private void updateLastUpdateDisplay(Date newValue) {
 438         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 439         TextView v = findViewById(R.id.transactions_last_update);
 440         if (newValue == null) {
 441             l.setVisibility(View.INVISIBLE);
 442             debug("main", "no last update date :(");
 443         }
 444         else {
 445             final String text = DateFormat.getDateTimeInstance().format(newValue);
 446             v.setText(text);
 447             l.setVisibility(View.VISIBLE);
 448             debug("main", String.format("Date formatted: %s", text));
 449         }
 450
 451         scheduleDataRetrievalIfStale(newValue);
 452     }
 453     @Override
 454     public void finish() {
 455         if (profilesObserver != null) {
 456             Data.profiles.deleteObserver(profilesObserver);
 457             profilesObserver = null;
 458         }
 459
 460         if (profileObserver != null) {
 461             Data.profile.deleteObserver(profileObserver);
 462             profileObserver = null;
 463         }
 464
 465         super.finish();
 466     }
 467     private void profileThemeChanged() {
 468         setupProfileColors();
 469
 470         Bundle bundle = new Bundle();
 471         onSaveInstanceState(bundle);
 472         // restart activity to reflect theme change
 473         finish();
 474         Intent intent = new Intent(this, this.getClass());
 475         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 476         startActivity(intent);
 477     }
 478     public void startEditProfileActivity(MobileLedgerProfile profile) {
 479         Intent intent = new Intent(this, ProfileDetailActivity.class);
 480         Bundle args = new Bundle();
 481         if (profile != null) {
 482             int index = Data.getProfileIndex(profile);
 483             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 484         }
 485         intent.putExtras(args);
 486         startActivity(intent, args);
 487     }
 488     private void setupProfile() {
 489         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 490         MobileLedgerProfile profile;
 491
 492         profile = Data.getProfile(profileUUID);
 493
 494         if (Data.profiles.isEmpty()) {
 495             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 496             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 497             return;
 498         }
 499
 500         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 501         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 502
 503         if (profile == null) profile = Data.profiles.get(0);
 504
 505         if (profile == null) throw new AssertionError("profile must have a value");
 506
 507         Data.setCurrentProfile(profile);
 508     }
 509     public void fabNewTransactionClicked(View view) {
 510         Intent intent = new Intent(this, NewTransactionActivity.class);
 511         startActivity(intent);
 512         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 513     }
 514     public void navSettingsClicked(View view) {
 515         Intent intent = new Intent(this, SettingsActivity.class);
 516         startActivity(intent);
 517         drawer.closeDrawers();
 518     }
 519     public void markDrawerItemCurrent(int id) {
 520         TextView item = drawer.findViewById(id);
 521         item.setBackgroundColor(Colors.tableRowDarkBG);
 522
 523         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 524         for (int i = 0; i < actions.getChildCount(); i++) {
 525             View view = actions.getChildAt(i);
 526             if (view.getId() != id) {
 527                 view.setBackgroundColor(Color.TRANSPARENT);
 528             }
 529         }
 530     }
 531     public void onAccountSummaryClicked(View view) {
 532         drawer.closeDrawers();
 533
 534         showAccountSummaryFragment();
 535     }
 536     private void showAccountSummaryFragment() {
 537         mViewPager.setCurrentItem(0, true);
 538         Data.accountFilter.setValue(null);
 539 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 540 //        accountSummaryFragment = new AccountSummaryFragment();
 541 //        ft.replace(R.id.root_frame, accountSummaryFragment);
 542 //        ft.commit();
 543 //        currentFragment = accountSummaryFragment;
 544     }
 545     public void onLatestTransactionsClicked(View view) {
 546         drawer.closeDrawers();
 547
 548         showTransactionsFragment((String) null);
 549     }
 550     private void resetFragmentBackStack() {
 551 //        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
 552     }
 553     private void showTransactionsFragment(String accName) {
 554         Data.accountFilter.setValue(accName);
 555         mViewPager.setCurrentItem(1, true);
 556     }
 557     private void showTransactionsFragment(LedgerAccount account) {
 558         showTransactionsFragment((account == null) ? (String) null : account.getName());
 559 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 560 //        if (transactionListFragment == null) {
 561 //            debug("flow", "MainActivity creating TransactionListFragment");
 562 //            transactionListFragment = new TransactionListFragment();
 563 //        }
 564 //        Bundle bundle = new Bundle();
 565 //        if (account != null) {
 566 //            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
 567 //                    account.getName());
 568 //        }
 569 //        transactionListFragment.setArguments(bundle);
 570 //        ft.replace(R.id.root_frame, transactionListFragment);
 571 //        if (account != null)
 572 //            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
 573 //        ft.commit();
 574 //
 575 //        currentFragment = transactionListFragment;
 576     }
 577     public void showAccountTransactions(LedgerAccount account) {
 578         mBackMeansToAccountList = true;
 579         showTransactionsFragment(account);
 580     }
 581     @Override
 582     public void onBackPressed() {
 583         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 584         if (drawer.isDrawerOpen(GravityCompat.START)) {
 585             drawer.closeDrawer(GravityCompat.START);
 586         }
 587         else {
 588             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 589                 Data.accountFilter.setValue(null);
 590                 showAccountSummaryFragment();
 591                 mBackMeansToAccountList = false;
 592             }
 593             else {
 594                 debug("fragments", String.format("manager stack: %d",
 595                         fragmentManager.getBackStackEntryCount()));
 596
 597                 super.onBackPressed();
 598             }
 599         }
 600     }
 601     public void updateLastUpdateTextFromDB() {
 602         final MobileLedgerProfile profile = Data.profile.get();
 603         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 604
 605         debug("transactions", String.format("Last update = %d", last_update));
 606         if (last_update == 0) {
 607             Data.lastUpdateDate.postValue(null);
 608         }
 609         else {
 610             Data.lastUpdateDate.postValue(new Date(last_update));
 611         }
 612     }
 613     public void scheduleTransactionListRetrieval() {
 614         if (Data.profile.get() == null) return;
 615
 616         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 617
 618         retrieveTransactionsTask.execute();
 619     }
 620     public void onStopTransactionRefreshClick(View view) {
 621         debug("interactive", "Cancelling transactions refresh");
 622         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 623         bTransactionListCancelDownload.setEnabled(false);
 624     }
 625     public void onRetrieveDone(String error) {
 626         progressLayout.setVisibility(View.GONE);
 627
 628         if (error == null) {
 629             updateLastUpdateTextFromDB();
 630
 631             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 632             TransactionListViewModel.scheduleTransactionListReload();
 633         }
 634         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 635     }
 636     public void onRetrieveStart() {
 637         bTransactionListCancelDownload.setEnabled(true);
 638         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 639         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 640         progressBar.setIndeterminate(true);
 641         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 642         else progressBar.setProgress(0);
 643         progressLayout.setVisibility(View.VISIBLE);
 644     }
 645     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 646         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 647             (progress.getTotal() == 0))
 648         {
 649             progressBar.setIndeterminate(true);
 650         }
 651         else {
 652             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 653                 progressBar.setMin(0);
 654             }
 655             progressBar.setMax(progress.getTotal());
 656             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 657                 progressBar.setProgress(progress.getProgress(), true);
 658             }
 659             else progressBar.setProgress(progress.getProgress());
 660             progressBar.setIndeterminate(false);
 661         }
 662     }
 663     public void fabShouldShow() {
 664         MobileLedgerProfile profile = Data.profile.get();
 665         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 666     }
 667     public void navProfilesHeadClicked(View view) {
 668         if (profileListExpanded) {
 669             collapseProfileList();
 670         }
 671         else {
 672             expandProfileList();
 673         }
 674     }
 675     private void expandProfileList() {
 676         profileListExpanded = true;
 677
 678
 679         profileListContainer.setVisibility(View.VISIBLE);
 680         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 681         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 682         profileListHeadMore.setVisibility(View.VISIBLE);
 683         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 684         findViewById(R.id.nav_profile_list).setMinimumHeight(
 685                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 686                        Data.profiles.size()));
 687     }
 688     private void collapseProfileList() {
 689         profileListExpanded = false;
 690
 691         final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 692         animation.setAnimationListener(new Animation.AnimationListener() {
 693             @Override
 694             public void onAnimationStart(Animation animation) {
 695
 696             }
 697             @Override
 698             public void onAnimationEnd(Animation animation) {
 699                 profileListContainer.setVisibility(View.GONE);
 700             }
 701             @Override
 702             public void onAnimationRepeat(Animation animation) {
 703
 704             }
 705         });
 706         mProfileListAdapter.stopEditingProfiles();
 707
 708         profileListContainer.startAnimation(animation);
 709         profileListHeadArrow.setRotation(0f);
 710         profileListHeadArrow
 711                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 712         final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 713         moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 714             @Override
 715             public void onAnimationStart(Animation animation) {}
 716             @Override
 717             public void onAnimationEnd(Animation animation) {
 718                 profileListHeadMore.setVisibility(View.GONE);
 719             }
 720             @Override
 721             public void onAnimationRepeat(Animation animation) {}
 722         });
 723         profileListHeadMore.startAnimation(moreAnimation);
 724     }
 725     public void onAccountSummaryRowViewClicked(View view) {
 726         ViewGroup row;
 727         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 728         else row = (ViewGroup) view.getParent();
 729
 730         LedgerAccount acc = (LedgerAccount) row.getTag();
 731         switch (view.getId()) {
 732             case R.id.account_row_acc_name:
 733             case R.id.account_expander:
 734             case R.id.account_expander_container:
 735                 debug("accounts", "Account expander clicked");
 736                 if (!acc.hasSubAccounts()) return;
 737
 738                 boolean wasExpanded = acc.isExpanded();
 739
 740                 View arrow = row.findViewById(R.id.account_expander_container);
 741
 742                 arrow.clearAnimation();
 743                 ViewPropertyAnimator animator = arrow.animate();
 744
 745                 acc.toggleExpanded();
 746                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 747                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 748                         });
 749
 750                 if (wasExpanded) {
 751                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 752                     arrow.setRotation(0);
 753                     animator.rotationBy(180);
 754
 755                     // removing all child accounts from the view
 756                     int start = -1, count = 0;
 757                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 758                         for (int i = 0; i < Data.accounts.size(); i++) {
 759                             if (acc.isParentOf(Data.accounts.get(i))) {
 760 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 761 //                                        Data.accounts.get(i).getName(), i));
 762                                 if (start == -1) {
 763                                     start = i;
 764                                 }
 765                                 count++;
 766                             }
 767                             else {
 768                                 if (start != -1) {
 769 //                                    debug("accounts",
 770 //                                            String.format("Found a non-child '%s' at position %d",
 771 //                                                    Data.accounts.get(i).getName(), i));
 772                                     break;
 773                                 }
 774                             }
 775                         }
 776
 777                         if (start != -1) {
 778                             for (int j = 0; j < count; j++) {
 779 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 780 //                                        Data.accounts.get(start).getName()));
 781                                 Data.accounts.removeQuietly(start);
 782                             }
 783
 784                             mAccountSummaryFragment.modelAdapter
 785                                     .notifyItemRangeRemoved(start, count);
 786                         }
 787                     }
 788                 }
 789                 else {
 790                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 791                     arrow.setRotation(180);
 792                     animator.rotationBy(-180);
 793                     List<LedgerAccount> children =
 794                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 795                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 796                         int parentPos = Data.accounts.indexOf(acc);
 797                         if (parentPos != -1) {
 798                             // may have disappeared in a concurrent refresh operation
 799                             Data.accounts.addAllQuietly(parentPos + 1, children);
 800                             mAccountSummaryFragment.modelAdapter
 801                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 802                         }
 803                     }
 804                 }
 805                 break;
 806             case R.id.account_row_acc_amounts:
 807                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 808                     acc.toggleAmountsExpanded();
 809                     DbOpQueue
 810                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 811                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 812                                                  Data.profile.get().getUuid()
 813                                     });
 814                     Data.accounts.triggerItemChangedNotification(acc);
 815                 }
 816                 break;
 817         }
 818     }
 819
 820     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 821
 822         public SectionsPagerAdapter(FragmentManager fm) {
 823             super(fm);
 824         }
 825
 826         @NotNull
 827         @Override
 828         public Fragment getItem(int position) {
 829             debug("main", String.format("Switching to fragment %d", position));
 830             switch (position) {
 831                 case 0:
 832 //                    debug("flow", "Creating account summary fragment");
 833                     return mAccountSummaryFragment = new AccountSummaryFragment();
 834                 case 1:
 835                     return new TransactionListFragment();
 836                 default:
 837                     throw new IllegalStateException(
 838                             String.format("Unexpected fragment index: " + "%d", position));
 839             }
 840         }
 841
 842         @Override
 843         public int getCount() {
 844             return 2;
 845         }
 846     }
 847 }