app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java

   1 /*
   2  * Copyright © 2019 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui.activity;
  19
  20 import android.content.Intent;
  21 import android.content.SharedPreferences;
  22 import android.content.pm.PackageInfo;
  23 import android.content.pm.ShortcutInfo;
  24 import android.content.pm.ShortcutManager;
  25 import android.content.res.ColorStateList;
  26 import android.graphics.Color;
  27 import android.graphics.drawable.Icon;
  28 import android.os.AsyncTask;
  29 import android.os.Build;
  30 import android.os.Bundle;
  31 import android.util.Log;
  32 import android.view.View;
  33 import android.view.ViewGroup;
  34 import android.view.ViewPropertyAnimator;
  35 import android.view.animation.Animation;
  36 import android.view.animation.AnimationUtils;
  37 import android.widget.LinearLayout;
  38 import android.widget.ProgressBar;
  39 import android.widget.TextView;
  40 import android.widget.Toast;
  41
  42 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  43
  44 import net.ktnx.mobileledger.R;
  45 import net.ktnx.mobileledger.async.DbOpQueue;
  46 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  47 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  48 import net.ktnx.mobileledger.model.Data;
  49 import net.ktnx.mobileledger.model.LedgerAccount;
  50 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  51 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
  52 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  53 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
  54 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  55 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  56 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  57 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  58 import net.ktnx.mobileledger.utils.Colors;
  59 import net.ktnx.mobileledger.utils.GetOptCallback;
  60 import net.ktnx.mobileledger.utils.LockHolder;
  61 import net.ktnx.mobileledger.utils.MLDB;
  62
  63 import org.jetbrains.annotations.NotNull;
  64
  65 import java.text.DateFormat;
  66 import java.util.ArrayList;
  67 import java.util.Date;
  68 import java.util.List;
  69 import java.util.Locale;
  70 import java.util.Observer;
  71
  72 import androidx.appcompat.app.ActionBarDrawerToggle;
  73 import androidx.appcompat.widget.Toolbar;
  74 import androidx.core.view.GravityCompat;
  75 import androidx.drawerlayout.widget.DrawerLayout;
  76 import androidx.fragment.app.Fragment;
  77 import androidx.fragment.app.FragmentManager;
  78 import androidx.fragment.app.FragmentPagerAdapter;
  79 import androidx.recyclerview.widget.LinearLayoutManager;
  80 import androidx.recyclerview.widget.RecyclerView;
  81 import androidx.viewpager.widget.ViewPager;
  82
  83 import static net.ktnx.mobileledger.utils.Logger.debug;
  84
  85 public class MainActivity extends ProfileThemedActivity {
  86     public static final String STATE_CURRENT_PAGE = "current_page";
  87     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  88     public static final String STATE_ACC_FILTER = "account_filter";
  89     private static final String PREF_THEME_ID = "themeId";
  90     public AccountSummaryFragment mAccountSummaryFragment;
  91     DrawerLayout drawer;
  92     private LinearLayout profileListContainer;
  93     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  94     private FragmentManager fragmentManager;
  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 profileListExpanded = false;
 102     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 103     private int mCurrentPage;
 104     private String mAccountFilter;
 105     private boolean mBackMeansToAccountList = false;
 106     private Toolbar mToolbar;
 107     private DrawerLayout.SimpleDrawerListener drawerListener;
 108     private ActionBarDrawerToggle barDrawerToggle;
 109     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 110     private Observer editingProfilesObserver;
 111     private MobileLedgerProfile profile;
 112     @Override
 113     protected void onStart() {
 114         super.onStart();
 115
 116         debug("flow", "MainActivity.onStart()");
 117         mViewPager.setCurrentItem(mCurrentPage, false);
 118         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 119         else Data.accountFilter.setValue(null);
 120
 121     }
 122     @Override
 123     protected void onSaveInstanceState(@NotNull Bundle outState) {
 124         super.onSaveInstanceState(outState);
 125         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 126         if (mAccountFilter != null) outState.putString(STATE_ACC_FILTER, mAccountFilter);
 127     }
 128     @Override
 129     protected void onDestroy() {
 130         mSectionsPagerAdapter = null;
 131         RecyclerView root = findViewById(R.id.nav_profile_list);
 132         if (root != null) root.setAdapter(null);
 133         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 134         drawerListener = null;
 135         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 136         barDrawerToggle = null;
 137         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 138         pageChangeListener = null;
 139         if (mProfileListAdapter != null)
 140             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 141         editingProfilesObserver = null;
 142         super.onDestroy();
 143     }
 144     @Override
 145     protected void setupProfileColors() {
 146         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 147         int profileColor = prefs.getInt(PREF_THEME_ID, -2);
 148         if (profileColor == -2) profileColor = Data.retrieveCurrentThemeIdFromDb();
 149         Colors.setupTheme(this, profileColor);
 150         Colors.profileThemeId = profileColor;
 151         storeThemeIdInPrefs(profileColor);
 152     }
 153     @Override
 154     protected void onCreate(Bundle savedInstanceState) {
 155         super.onCreate(savedInstanceState);
 156         debug("flow", "MainActivity.onCreate()");
 157         setContentView(R.layout.activity_main);
 158
 159         fab = findViewById(R.id.btn_add_transaction);
 160         profileListContainer = findViewById(R.id.nav_profile_list_container);
 161         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 162         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 163         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 164         LinearLayout profileListHeadMoreAndCancel =
 165                 findViewById(R.id.nav_profile_list_head_buttons);
 166         drawer = findViewById(R.id.drawer_layout);
 167         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 168         progressBar = findViewById(R.id.transaction_list_progress_bar);
 169         progressLayout = findViewById(R.id.transaction_progress_layout);
 170         fragmentManager = getSupportFragmentManager();
 171         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 172         mViewPager = findViewById(R.id.root_frame);
 173
 174         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 175         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 176
 177
 178         mToolbar = findViewById(R.id.toolbar);
 179         setSupportActionBar(mToolbar);
 180
 181         Data.profile.observe(this, this::onProfileChanged);
 182
 183         Data.profiles.observe(this, this::onProfileListChanged);
 184
 185         if (barDrawerToggle == null) {
 186             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 187                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 188             drawer.addDrawerListener(barDrawerToggle);
 189         }
 190         barDrawerToggle.syncState();
 191
 192         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 193
 194         try {
 195             PackageInfo pi =
 196                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 197             ver.setText(pi.versionName);
 198         }
 199         catch (Exception e) {
 200             e.printStackTrace();
 201         }
 202
 203         if (progressBar == null)
 204             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 205         if (progressLayout == null) throw new RuntimeException(
 206                 "Can't get hold on the transaction value progress bar layout");
 207
 208         markDrawerItemCurrent(R.id.nav_account_summary);
 209
 210         mViewPager.setAdapter(mSectionsPagerAdapter);
 211
 212         if (pageChangeListener == null) {
 213             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 214                 @Override
 215                 public void onPageSelected(int position) {
 216                     switch (position) {
 217                         case 0:
 218                             markDrawerItemCurrent(R.id.nav_account_summary);
 219                             break;
 220                         case 1:
 221                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 222                             break;
 223                         default:
 224                             Log.e("MainActivity",
 225                                     String.format("Unexpected page index %d", position));
 226                     }
 227
 228                     super.onPageSelected(position);
 229                 }
 230             };
 231             mViewPager.addOnPageChangeListener(pageChangeListener);
 232         }
 233
 234         mCurrentPage = 0;
 235         if (savedInstanceState != null) {
 236             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 237             if (currentPage != -1) {
 238                 mCurrentPage = currentPage;
 239             }
 240             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 241         }
 242         else mAccountFilter = null;
 243
 244         Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 245
 246         findViewById(R.id.btn_no_profiles_add)
 247                 .setOnClickListener(v -> startEditProfileActivity(null));
 248
 249         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 250
 251         findViewById(R.id.nav_new_profile_button)
 252                 .setOnClickListener(v -> startEditProfileActivity(null));
 253
 254         RecyclerView root = findViewById(R.id.nav_profile_list);
 255         if (root == null)
 256             throw new RuntimeException("Can't get hold on the transaction value view");
 257
 258         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 259         root.setAdapter(mProfileListAdapter);
 260
 261         if (editingProfilesObserver == null) {
 262             editingProfilesObserver = (o, arg) -> {
 263                 if (mProfileListAdapter.isEditingProfiles()) {
 264                     profileListHeadMore.setVisibility(View.GONE);
 265                     profileListHeadMore
 266                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 267                     profileListHeadCancel.setVisibility(View.VISIBLE);
 268                     profileListHeadCancel
 269                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 270                 }
 271                 else {
 272                     profileListHeadCancel.setVisibility(View.GONE);
 273                     profileListHeadCancel
 274                             .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_out));
 275                     profileListHeadMore.setVisibility(View.GONE);
 276                     if (profileListExpanded) {
 277                         profileListHeadMore.setVisibility(View.VISIBLE);
 278                         profileListHeadMore
 279                                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 280                     }
 281                     else profileListHeadMore.setVisibility(View.GONE);
 282                 }
 283             };
 284             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 285         }
 286
 287         LinearLayoutManager llm = new LinearLayoutManager(this);
 288
 289         llm.setOrientation(RecyclerView.VERTICAL);
 290         root.setLayoutManager(llm);
 291
 292         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 293         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 294         profileListHeadMoreAndCancel
 295                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 296
 297         if (drawerListener == null) {
 298             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 299                 @Override
 300                 public void onDrawerClosed(View drawerView) {
 301                     super.onDrawerClosed(drawerView);
 302                     collapseProfileList();
 303                 }
 304             };
 305             drawer.addDrawerListener(drawerListener);
 306         }
 307
 308         findViewById(R.id.nav_profile_list_head_layout)
 309                 .setOnClickListener(this::navProfilesHeadClicked);
 310         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 311         setupProfile();
 312     }
 313     private void scheduleDataRetrievalIfStale(Date lastUpdate) {
 314         long now = new Date().getTime();
 315         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 316             if (lastUpdate == null) debug("db::", "WEB data never fetched. scheduling a fetch");
 317             else debug("db", String.format(Locale.ENGLISH,
 318                     "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 319                     lastUpdate.getTime() / 1000f, now / 1000f));
 320
 321             Data.scheduleTransactionListRetrieval(this);
 322         }
 323     }
 324     private void createShortcuts(List<MobileLedgerProfile> list) {
 325         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) return;
 326
 327         List<ShortcutInfo> shortcuts = new ArrayList<>();
 328         int i = 0;
 329         for (MobileLedgerProfile p : list) {
 330             if (!p.isPostingPermitted()) continue;
 331
 332             ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 333                     .setShortLabel(p.getName())
 334                     .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 335                     .setIntent(
 336                             new Intent(Intent.ACTION_VIEW, null, this, NewTransactionActivity.class)
 337                                     .putExtra("profile_uuid", p.getUuid())).setRank(i).build();
 338             shortcuts.add(si);
 339             i++;
 340         }
 341         ShortcutManager sm = getSystemService(ShortcutManager.class);
 342         sm.setDynamicShortcuts(shortcuts);
 343     }
 344     private void onProfileListChanged(List<MobileLedgerProfile> newList) {
 345         if (newList.isEmpty()) {
 346             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 347             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 348             findViewById(R.id.loading_layout).setVisibility(View.GONE);
 349             return;
 350         }
 351
 352         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 353         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 354         findViewById(R.id.loading_layout).setVisibility(View.GONE);
 355
 356         findViewById(R.id.nav_profile_list).setMinimumHeight(
 357                 (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
 358
 359         debug("profiles", "profile list changed");
 360         mProfileListAdapter.notifyDataSetChanged();
 361
 362         createShortcuts(newList);
 363     }
 364     /**
 365      * called when the current profile has changed
 366      */
 367     private void onProfileChanged(MobileLedgerProfile profile) {
 368         boolean haveProfile = profile != null;
 369         findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 370         findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 371
 372         if (haveProfile) setTitle(profile.getName());
 373         else setTitle(R.string.app_name);
 374
 375         this.profile = profile;
 376
 377         mProfileListAdapter.notifyDataSetChanged();
 378
 379         int newProfileTheme = haveProfile ? profile.getThemeId() : -1;
 380         if (newProfileTheme != Colors.profileThemeId) {
 381             debug("profiles",
 382                     String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
 383                             newProfileTheme));
 384             MainActivity.this.profileThemeChanged();
 385             Colors.profileThemeId = newProfileTheme;
 386             // profileThemeChanged would restart the activity, so no need to reload the
 387             // data sets below
 388             return;
 389         }
 390         collapseProfileList();
 391
 392         drawer.closeDrawers();
 393
 394         Data.transactions.clear();
 395         debug("transactions", "requesting list reload");
 396         TransactionListViewModel.scheduleTransactionListReload();
 397
 398         Data.accounts.clear();
 399         AccountSummaryViewModel.scheduleAccountListReload();
 400
 401         if (haveProfile) {
 402             if (profile.isPostingPermitted()) {
 403                 mToolbar.setSubtitle(null);
 404                 fab.show();
 405             }
 406             else {
 407                 mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 408                 fab.hide();
 409             }
 410         }
 411         else {
 412             mToolbar.setSubtitle(null);
 413             fab.hide();
 414         }
 415
 416         updateLastUpdateTextFromDB();
 417     }
 418     private void updateLastUpdateDisplay(Date newValue) {
 419         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 420         TextView v = findViewById(R.id.transactions_last_update);
 421         if (newValue == null) {
 422             l.setVisibility(View.INVISIBLE);
 423             debug("main", "no last update date :(");
 424         }
 425         else {
 426             final String text = DateFormat.getDateTimeInstance().format(newValue);
 427             v.setText(text);
 428             l.setVisibility(View.VISIBLE);
 429             debug("main", String.format("Date formatted: %s", text));
 430         }
 431
 432         scheduleDataRetrievalIfStale(newValue);
 433     }
 434     private void profileThemeChanged() {
 435         Bundle bundle = new Bundle();
 436         onSaveInstanceState(bundle);
 437
 438         storeThemeIdInPrefs(profile.getThemeId());
 439
 440         // restart activity to reflect theme change
 441         finish();
 442
 443         // un-hook all observed LiveData
 444         Data.profile.removeObservers(this);
 445         Data.profiles.removeObservers(this);
 446         Data.lastUpdateDate.removeObservers(this);
 447         Intent intent = new Intent(this, this.getClass());
 448         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 449         startActivity(intent);
 450     }
 451     private void storeThemeIdInPrefs(int themeId) {
 452         // store the new theme id in the preferences
 453         SharedPreferences prefs = getPreferences(MODE_PRIVATE);
 454         SharedPreferences.Editor e = prefs.edit();
 455         e.putInt(PREF_THEME_ID, themeId);
 456         e.apply();
 457     }
 458     public void startEditProfileActivity(MobileLedgerProfile profile) {
 459         Intent intent = new Intent(this, ProfileDetailActivity.class);
 460         Bundle args = new Bundle();
 461         if (profile != null) {
 462             int index = Data.getProfileIndex(profile);
 463             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 464         }
 465         intent.putExtras(args);
 466         startActivity(intent, args);
 467     }
 468     private void setupProfile() {
 469         MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
 470             @Override
 471             protected void onResult(String profileUUID) {
 472                 MobileLedgerProfile startupProfile;
 473
 474                 startupProfile = Data.getProfile(profileUUID);
 475                 Data.setCurrentProfile(startupProfile);
 476             }
 477         });
 478     }
 479     public void fabNewTransactionClicked(View view) {
 480         Intent intent = new Intent(this, NewTransactionActivity.class);
 481         startActivity(intent);
 482         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 483     }
 484     public void navSettingsClicked(View view) {
 485         Intent intent = new Intent(this, SettingsActivity.class);
 486         startActivity(intent);
 487         drawer.closeDrawers();
 488     }
 489     public void markDrawerItemCurrent(int id) {
 490         TextView item = drawer.findViewById(id);
 491         item.setBackgroundColor(Colors.tableRowDarkBG);
 492
 493         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 494         for (int i = 0; i < actions.getChildCount(); i++) {
 495             View view = actions.getChildAt(i);
 496             if (view.getId() != id) {
 497                 view.setBackgroundColor(Color.TRANSPARENT);
 498             }
 499         }
 500     }
 501     public void onAccountSummaryClicked(View view) {
 502         drawer.closeDrawers();
 503
 504         showAccountSummaryFragment();
 505     }
 506     private void showAccountSummaryFragment() {
 507         mViewPager.setCurrentItem(0, true);
 508         Data.accountFilter.setValue(null);
 509     }
 510     public void onLatestTransactionsClicked(View view) {
 511         drawer.closeDrawers();
 512
 513         showTransactionsFragment((String) null);
 514     }
 515     private void showTransactionsFragment(String accName) {
 516         Data.accountFilter.setValue(accName);
 517         mViewPager.setCurrentItem(1, true);
 518     }
 519     private void showTransactionsFragment(LedgerAccount account) {
 520         showTransactionsFragment((account == null) ? null : account.getName());
 521     }
 522     public void showAccountTransactions(LedgerAccount account) {
 523         mBackMeansToAccountList = true;
 524         showTransactionsFragment(account);
 525     }
 526     @Override
 527     public void onBackPressed() {
 528         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 529         if (drawer.isDrawerOpen(GravityCompat.START)) {
 530             drawer.closeDrawer(GravityCompat.START);
 531         }
 532         else {
 533             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 534                 Data.accountFilter.setValue(null);
 535                 showAccountSummaryFragment();
 536                 mBackMeansToAccountList = false;
 537             }
 538             else {
 539                 debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
 540                         fragmentManager.getBackStackEntryCount()));
 541
 542                 super.onBackPressed();
 543             }
 544         }
 545     }
 546     public void updateLastUpdateTextFromDB() {
 547         long last_update = (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 548
 549         debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
 550         if (last_update == 0) {
 551             Data.lastUpdateDate.postValue(null);
 552         }
 553         else {
 554             Data.lastUpdateDate.postValue(new Date(last_update));
 555         }
 556     }
 557     public void onStopTransactionRefreshClick(View view) {
 558         debug("interactive", "Cancelling transactions refresh");
 559         Data.stopTransactionsRetrieval();
 560         bTransactionListCancelDownload.setEnabled(false);
 561     }
 562     public void onRetrieveDone(String error) {
 563         Data.transactionRetrievalDone();
 564         progressLayout.setVisibility(View.GONE);
 565
 566         if (error == null) {
 567             updateLastUpdateTextFromDB();
 568
 569             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 570             TransactionListViewModel.scheduleTransactionListReload();
 571         }
 572         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 573     }
 574     public void onRetrieveStart() {
 575         bTransactionListCancelDownload.setEnabled(true);
 576         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 577         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 578         progressBar.setIndeterminate(true);
 579         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 580         else progressBar.setProgress(0);
 581         progressLayout.setVisibility(View.VISIBLE);
 582     }
 583     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 584         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 585             (progress.getTotal() == 0))
 586         {
 587             progressBar.setIndeterminate(true);
 588         }
 589         else {
 590             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 591                 progressBar.setMin(0);
 592             }
 593             progressBar.setMax(progress.getTotal());
 594             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 595                 progressBar.setProgress(progress.getProgress(), true);
 596             }
 597             else progressBar.setProgress(progress.getProgress());
 598             progressBar.setIndeterminate(false);
 599         }
 600     }
 601     public void fabShouldShow() {
 602         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 603     }
 604     public void fabHide() {
 605         fab.hide();
 606     }
 607     public void navProfilesHeadClicked(View view) {
 608         if (profileListExpanded) {
 609             collapseProfileList();
 610         }
 611         else {
 612             expandProfileList();
 613         }
 614     }
 615     private void expandProfileList() {
 616         profileListExpanded = true;
 617
 618
 619         profileListContainer.setVisibility(View.VISIBLE);
 620         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 621         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 622         profileListHeadMore.setVisibility(View.VISIBLE);
 623         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 624         final ArrayList<MobileLedgerProfile> profiles = Data.profiles.getValue();
 625         findViewById(R.id.nav_profile_list).setMinimumHeight(
 626                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 627                        (profiles != null ? profiles.size() : 0)));
 628     }
 629     private void collapseProfileList() {
 630         boolean wasExpanded = profileListExpanded;
 631         profileListExpanded = false;
 632
 633         if (wasExpanded) {
 634             final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 635             animation.setAnimationListener(new Animation.AnimationListener() {
 636                 @Override
 637                 public void onAnimationStart(Animation animation) {
 638
 639                 }
 640                 @Override
 641                 public void onAnimationEnd(Animation animation) {
 642                     profileListContainer.setVisibility(View.GONE);
 643                 }
 644                 @Override
 645                 public void onAnimationRepeat(Animation animation) {
 646
 647                 }
 648             });
 649             mProfileListAdapter.stopEditingProfiles();
 650
 651             profileListContainer.startAnimation(animation);
 652             profileListHeadArrow.setRotation(0f);
 653             profileListHeadArrow
 654                     .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 655             final Animation moreAnimation = AnimationUtils.loadAnimation(this, R.anim.fade_out);
 656             moreAnimation.setAnimationListener(new Animation.AnimationListener() {
 657                 @Override
 658                 public void onAnimationStart(Animation animation) {
 659                 }
 660                 @Override
 661                 public void onAnimationEnd(Animation animation) {
 662                     profileListHeadMore.setVisibility(View.GONE);
 663                 }
 664                 @Override
 665                 public void onAnimationRepeat(Animation animation) {
 666                 }
 667             });
 668             profileListHeadMore.startAnimation(moreAnimation);
 669         }
 670         else {
 671             profileListContainer.setVisibility(View.GONE);
 672             profileListHeadArrow.setRotation(0f);
 673             profileListHeadMore.setVisibility(View.GONE);
 674         }
 675     }
 676     public void onAccountSummaryRowViewClicked(View view) {
 677         ViewGroup row;
 678         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 679         else row = (ViewGroup) view.getParent();
 680
 681         LedgerAccount acc = (LedgerAccount) row.getTag();
 682         switch (view.getId()) {
 683             case R.id.account_row_acc_name:
 684             case R.id.account_expander:
 685             case R.id.account_expander_container:
 686                 debug("accounts", "Account expander clicked");
 687                 if (!acc.hasSubAccounts()) return;
 688
 689                 boolean wasExpanded = acc.isExpanded();
 690
 691                 View arrow = row.findViewById(R.id.account_expander_container);
 692
 693                 arrow.clearAnimation();
 694                 ViewPropertyAnimator animator = arrow.animate();
 695
 696                 acc.toggleExpanded();
 697                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 698                         new Object[]{acc.isExpanded(), acc.getName(), profile.getUuid()
 699                         });
 700
 701                 if (wasExpanded) {
 702                     debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
 703                     arrow.setRotation(0);
 704                     animator.rotationBy(180);
 705
 706                     // removing all child accounts from the view
 707                     int start = -1, count = 0;
 708                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 709                         for (int i = 0; i < Data.accounts.size(); i++) {
 710                             if (acc.isParentOf(Data.accounts.get(i))) {
 711 //                                debug("accounts", String.format("Found a child '%s' at position %d",
 712 //                                        Data.accounts.get(i).getName(), i));
 713                                 if (start == -1) {
 714                                     start = i;
 715                                 }
 716                                 count++;
 717                             }
 718                             else {
 719                                 if (start != -1) {
 720 //                                    debug("accounts",
 721 //                                            String.format("Found a non-child '%s' at position %d",
 722 //                                                    Data.accounts.get(i).getName(), i));
 723                                     break;
 724                                 }
 725                             }
 726                         }
 727
 728                         if (start != -1) {
 729                             for (int j = 0; j < count; j++) {
 730 //                                debug("accounts", String.format("Removing item %d: %s", start + j,
 731 //                                        Data.accounts.get(start).getName()));
 732                                 Data.accounts.removeQuietly(start);
 733                             }
 734
 735                             mAccountSummaryFragment.modelAdapter
 736                                     .notifyItemRangeRemoved(start, count);
 737                         }
 738                     }
 739                 }
 740                 else {
 741                     debug("accounts", String.format("Expanding account '%s'", acc.getName()));
 742                     arrow.setRotation(180);
 743                     animator.rotationBy(-180);
 744                     List<LedgerAccount> children = profile.loadVisibleChildAccountsOf(acc);
 745                     try (LockHolder ignored = Data.accounts.lockForWriting()) {
 746                         int parentPos = Data.accounts.indexOf(acc);
 747                         if (parentPos != -1) {
 748                             // may have disappeared in a concurrent refresh operation
 749                             Data.accounts.addAllQuietly(parentPos + 1, children);
 750                             mAccountSummaryFragment.modelAdapter
 751                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 752                         }
 753                     }
 754                 }
 755                 break;
 756             case R.id.account_row_acc_amounts:
 757                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 758                     acc.toggleAmountsExpanded();
 759                     DbOpQueue
 760                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 761                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 762                                                  profile.getUuid()
 763                                     });
 764                     Data.accounts.triggerItemChangedNotification(acc);
 765                 }
 766                 break;
 767         }
 768     }
 769
 770     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 771
 772         SectionsPagerAdapter(FragmentManager fm) {
 773             super(fm);
 774         }
 775
 776         @NotNull
 777         @Override
 778         public Fragment getItem(int position) {
 779             debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
 780             switch (position) {
 781                 case 0:
 782 //                    debug("flow", "Creating account summary fragment");
 783                     return mAccountSummaryFragment = new AccountSummaryFragment();
 784                 case 1:
 785                     return new TransactionListFragment();
 786                 default:
 787                     throw new IllegalStateException(
 788                             String.format("Unexpected fragment index: " + "%d", position));
 789             }
 790         }
 791
 792         @Override
 793         public int getCount() {
 794             return 2;
 795         }
 796     }
 797 }