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