]> git.ktnx.net Git - mobile-ledger.git/blobdiff - app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
fix (+) fab visible after profile change (activity recreation)
[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / activity / MainActivity.java
index 208303983d55af65d6b5560ee8a77a6b758ea97e..3f71e0a4707cf0f19dd5883b372795d9b6cacc96 100644 (file)
 package net.ktnx.mobileledger.ui.activity;
 
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.pm.PackageInfo;
+import android.content.pm.ShortcutInfo;
+import android.content.pm.ShortcutManager;
 import android.content.res.ColorStateList;
 import android.graphics.Color;
+import android.graphics.drawable.Icon;
 import android.os.AsyncTask;
 import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.animation.Animation;
+import android.view.ViewPropertyAnimator;
 import android.view.animation.AnimationUtils;
 import android.widget.LinearLayout;
 import android.widget.ProgressBar;
 import android.widget.TextView;
-import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.ActionBarDrawerToggle;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.view.GravityCompat;
+import androidx.drawerlayout.widget.DrawerLayout;
+import androidx.fragment.app.Fragment;
+import androidx.fragment.app.FragmentManager;
+import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+import androidx.viewpager.widget.ViewPager;
 
 import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.snackbar.Snackbar;
 
 import net.ktnx.mobileledger.R;
+import net.ktnx.mobileledger.async.DbOpQueue;
 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
 import net.ktnx.mobileledger.model.Data;
 import net.ktnx.mobileledger.model.LedgerAccount;
 import net.ktnx.mobileledger.model.MobileLedgerProfile;
+import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
+import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
+import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
 import net.ktnx.mobileledger.utils.Colors;
+import net.ktnx.mobileledger.utils.GetOptCallback;
+import net.ktnx.mobileledger.utils.LockHolder;
 import net.ktnx.mobileledger.utils.MLDB;
 
-import java.lang.ref.WeakReference;
+import org.jetbrains.annotations.NotNull;
+
 import java.text.DateFormat;
+import java.util.ArrayList;
 import java.util.Date;
-import java.util.Observable;
-import java.util.Observer;
+import java.util.List;
+import java.util.Locale;
 
-import androidx.appcompat.app.ActionBarDrawerToggle;
-import androidx.appcompat.widget.Toolbar;
-import androidx.core.view.GravityCompat;
-import androidx.drawerlayout.widget.DrawerLayout;
-import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentPagerAdapter;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
-import androidx.viewpager.widget.ViewPager;
+import static net.ktnx.mobileledger.utils.Logger.debug;
+
+/*
+ * TODO: reports
+ *  */
 
 public class MainActivity extends ProfileThemedActivity {
-    private static final String STATE_CURRENT_PAGE = "current_page";
-    private static final String BUNDLE_SAVED_STATE = "bundle_savedState";
+    public static final String STATE_CURRENT_PAGE = "current_page";
+    public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
+    public static final String STATE_ACC_FILTER = "account_filter";
+    private static final String PREF_THEME_ID = "themeId";
+    public AccountSummaryFragment mAccountSummaryFragment;
     DrawerLayout drawer;
-    private LinearLayout profileListContainer;
-    private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
-    private LinearLayout profileListHeadMoreAndCancel;
-    private FragmentManager fragmentManager;
-    private TextView tvLastUpdate;
-    private RetrieveTransactionsTask retrieveTransactionsTask;
+    private View profileListHeadMore, profileListHeadCancel, profileListHeadAddProfile;
     private View bTransactionListCancelDownload;
-    private ProgressBar progressBar;
-    private LinearLayout progressLayout;
     private SectionsPagerAdapter mSectionsPagerAdapter;
     private ViewPager mViewPager;
     private FloatingActionButton fab;
-    private boolean profileModificationEnabled = false;
-    private boolean profileListExpanded = false;
     private ProfilesRecyclerViewAdapter mProfileListAdapter;
-
+    private int mCurrentPage;
+    private boolean mBackMeansToAccountList = false;
+    private Toolbar mToolbar;
+    private DrawerLayout.SimpleDrawerListener drawerListener;
+    private ActionBarDrawerToggle barDrawerToggle;
+    private ViewPager.SimpleOnPageChangeListener pageChangeListener;
+    private MobileLedgerProfile profile;
     @Override
     protected void onStart() {
         super.onStart();
 
-        Data.lastUpdateDate.set(null);
-        updateLastUpdateTextFromDB();
-        Date lastUpdate = Data.lastUpdateDate.get();
-
-        long now = new Date().getTime();
-        if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
-            if (lastUpdate == null) Log.d("db::", "WEB data never fetched. scheduling a fetch");
-            else Log.d("db",
-                    String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
-                            lastUpdate.getTime() / 1000f, now / 1000f));
-
-            scheduleTransactionListRetrieval();
-        }
+        mViewPager.setCurrentItem(mCurrentPage, false);
     }
     @Override
-    protected void onSaveInstanceState(Bundle outState) {
+    protected void onSaveInstanceState(@NotNull Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
+        if (Data.accountFilter.getValue() != null)
+            outState.putString(STATE_ACC_FILTER, Data.accountFilter.getValue());
+    }
+    @Override
+    protected void onDestroy() {
+        mSectionsPagerAdapter = null;
+        RecyclerView root = findViewById(R.id.nav_profile_list);
+        if (root != null)
+            root.setAdapter(null);
+        if (drawer != null)
+            drawer.removeDrawerListener(drawerListener);
+        drawerListener = null;
+        if (drawer != null)
+            drawer.removeDrawerListener(barDrawerToggle);
+        barDrawerToggle = null;
+        if (mViewPager != null)
+            mViewPager.removeOnPageChangeListener(pageChangeListener);
+        pageChangeListener = null;
+        super.onDestroy();
+    }
+    @Override
+    protected void setupProfileColors() {
+        SharedPreferences prefs = getPreferences(MODE_PRIVATE);
+        int profileColor = prefs.getInt(PREF_THEME_ID, -2);
+        if (profileColor == -2)
+            profileColor = Data.retrieveCurrentThemeIdFromDb();
+        Colors.setupTheme(this, profileColor);
+        Colors.profileThemeId = profileColor;
+        storeThemeIdInPrefs(profileColor);
+    }
+    @Override
+    protected void onResume() {
+        super.onResume();
+        fabShouldShow();
     }
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
-
+        debug("flow", "MainActivity.onCreate()");
         setContentView(R.layout.activity_main);
 
         fab = findViewById(R.id.btn_add_transaction);
-        profileListContainer = findViewById(R.id.nav_profile_list_container);
-        profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
-        profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
+        LinearLayout profileListHeadMoreAndCancel =
+                findViewById(R.id.nav_profile_list_head_buttons);
+        profileListHeadAddProfile = findViewById(R.id.nav_new_profile_button);
         drawer = findViewById(R.id.drawer_layout);
-        tvLastUpdate = findViewById(R.id.transactions_last_update);
         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
-        progressBar = findViewById(R.id.transaction_list_progress_bar);
-        progressLayout = findViewById(R.id.transaction_progress_layout);
-        fragmentManager = getSupportFragmentManager();
-        mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
+        mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
         mViewPager = findViewById(R.id.root_frame);
 
         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
-        if (extra != null && savedInstanceState == null) savedInstanceState = extra;
+        if (extra != null && savedInstanceState == null)
+            savedInstanceState = extra;
 
 
-        Toolbar toolbar = findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+        mToolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(mToolbar);
 
-        Data.profile.addObserver((o, arg) -> {
-            MobileLedgerProfile profile = Data.profile.get();
-            runOnUiThread(() -> {
-                if (profile == null) setTitle(R.string.app_name);
-                else setTitle(profile.getName());
-                updateLastUpdateTextFromDB();
-                if (profile.isPostingPermitted()) {
-                    toolbar.setSubtitle(null);
-                    fab.show();
-                }
-                else {
-                    toolbar.setSubtitle(R.string.profile_subitlte_read_only);
-                    fab.hide();
-                }
+        Data.profile.observe(this, this::onProfileChanged);
 
-                int newProfileTheme = profile.getThemeId();
-                if (newProfileTheme != Colors.profileThemeId) {
-                    Log.d("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
-                            newProfileTheme));
-                    profileThemeChanged();
-                    Colors.profileThemeId = newProfileTheme;
-                }
-            });
-        });
+        Data.profiles.observe(this, this::onProfileListChanged);
 
-        ActionBarDrawerToggle toggle =
-                new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open,
-                        R.string.navigation_drawer_close);
-        drawer.addDrawerListener(toggle);
-        toggle.syncState();
+        if (barDrawerToggle == null) {
+            barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
+                    R.string.navigation_drawer_open, R.string.navigation_drawer_close);
+            drawer.addDrawerListener(barDrawerToggle);
+        }
+        barDrawerToggle.syncState();
+        drawer.addDrawerListener(new DrawerLayout.DrawerListener() {
+            @Override
+            public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
+                if (slideOffset > 0.2)
+                    fabHide();
+            }
+            @Override
+            public void onDrawerOpened(@NonNull View drawerView) {
+                fabHide();
+            }
+            @Override
+            public void onDrawerClosed(@NonNull View drawerView) {
+                fabShouldShow();
+            }
+            @Override
+            public void onDrawerStateChanged(int newState) {}
+        });
 
-        TextView ver = drawer.findViewById(R.id.drawer_version_text);
 
         try {
-            PackageInfo pi =
-                    getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
-            ver.setText(pi.versionName);
+            PackageInfo pi = getApplicationContext().getPackageManager()
+                                                    .getPackageInfo(getPackageName(), 0);
+            ((TextView) findViewById(R.id.nav_upper).findViewById(
+                    R.id.drawer_version_text)).setText(pi.versionName);
+            ((TextView) findViewById(R.id.no_profiles_layout).findViewById(
+                    R.id.drawer_version_text)).setText(pi.versionName);
         }
         catch (Exception e) {
             e.printStackTrace();
         }
 
-        if (progressBar == null)
-            throw new RuntimeException("Can't get hold on the transaction value progress bar");
-        if (progressLayout == null) throw new RuntimeException(
-                "Can't get hold on the transaction value progress bar layout");
-
         markDrawerItemCurrent(R.id.nav_account_summary);
 
         mViewPager.setAdapter(mSectionsPagerAdapter);
-        mViewPager.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
-            @Override
-            public void onPageSelected(int position) {
-                switch (position) {
-                    case 0:
-                        markDrawerItemCurrent(R.id.nav_account_summary);
-                        break;
-                    case 1:
-                        markDrawerItemCurrent(R.id.nav_latest_transactions);
-                        break;
-                    default:
-                        Log.e("MainActivity", String.format("Unexpected page index %d", position));
-                }
 
-                super.onPageSelected(position);
-            }
-        });
+        if (pageChangeListener == null) {
+            pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
+                @Override
+                public void onPageSelected(int position) {
+                    mCurrentPage = position;
+                    switch (position) {
+                        case 0:
+                            markDrawerItemCurrent(R.id.nav_account_summary);
+                            break;
+                        case 1:
+                            markDrawerItemCurrent(R.id.nav_latest_transactions);
+                            break;
+                        default:
+                            Log.e("MainActivity",
+                                    String.format("Unexpected page index %d", position));
+                    }
+
+                    super.onPageSelected(position);
+                }
+            };
+            mViewPager.addOnPageChangeListener(pageChangeListener);
+        }
 
+        mCurrentPage = 0;
         if (savedInstanceState != null) {
             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
             if (currentPage != -1) {
-                mViewPager.setCurrentItem(currentPage, false);
+                mCurrentPage = currentPage;
             }
+            Data.accountFilter.setValue(savedInstanceState.getString(STATE_ACC_FILTER, null));
         }
 
-        Data.lastUpdateDate.addObserver((o, arg) -> {
-            Log.d("main", "lastUpdateDate changed");
-            runOnUiThread(() -> {
-                Date date = Data.lastUpdateDate.get();
-                if (date == null) {
-                    tvLastUpdate.setText(R.string.transaction_last_update_never);
-                }
-                else {
-                    final String text = DateFormat.getDateTimeInstance().format(date);
-                    tvLastUpdate.setText(text);
-                    Log.d("despair", String.format("Date formatted: %s", text));
-                }
-            });
-        });
+        Data.lastUpdateDate.observe(this, this::updateLastUpdateDisplay);
 
-        findViewById(R.id.btn_no_profiles_add)
-                .setOnClickListener(v -> startEditProfileActivity(null));
+        findViewById(R.id.btn_no_profiles_add).setOnClickListener(
+                v -> startEditProfileActivity(null));
 
         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 
-        findViewById(R.id.nav_new_profile_button)
-                .setOnClickListener(v -> startEditProfileActivity(null));
+        findViewById(R.id.nav_new_profile_button).setOnClickListener(
+                v -> startEditProfileActivity(null));
 
         RecyclerView root = findViewById(R.id.nav_profile_list);
         if (root == null)
             throw new RuntimeException("Can't get hold on the transaction value view");
 
-        mProfileListAdapter = new ProfilesRecyclerViewAdapter();
+        if (mProfileListAdapter == null)
+            mProfileListAdapter = new ProfilesRecyclerViewAdapter();
         root.setAdapter(mProfileListAdapter);
 
-        mProfileListAdapter.addEditingProfilesObserver(new Observer() {
-            @Override
-            public void update(Observable o, Object arg) {
-                if (mProfileListAdapter.isEditingProfiles()) {
-                    profileListHeadArrow.clearAnimation();
-                    profileListHeadArrow.setVisibility(View.GONE);
-                    profileListHeadMore.setVisibility(View.GONE);
-                    profileListHeadCancel.setVisibility(View.VISIBLE);
+        mProfileListAdapter.editingProfiles.observe(this, newValue -> {
+            if (newValue) {
+                profileListHeadMore.setVisibility(View.GONE);
+                profileListHeadCancel.setVisibility(View.VISIBLE);
+                profileListHeadAddProfile.setVisibility(View.VISIBLE);
+                if (drawer.isDrawerOpen(GravityCompat.START)) {
+                    profileListHeadMore.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
+                    profileListHeadCancel.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
+                    profileListHeadAddProfile.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
                 }
-                else {
-                    profileListHeadArrow.setRotation(180f);
-                    profileListHeadArrow.setVisibility(View.VISIBLE);
-                    profileListHeadCancel.setVisibility(View.GONE);
-                    profileListHeadMore.setVisibility(View.GONE);
-                    profileListHeadMore
-                            .setVisibility(profileListExpanded ? View.VISIBLE : View.GONE);
+            }
+            else {
+                profileListHeadCancel.setVisibility(View.GONE);
+                profileListHeadMore.setVisibility(View.VISIBLE);
+                profileListHeadAddProfile.setVisibility(View.GONE);
+                if (drawer.isDrawerOpen(GravityCompat.START)) {
+                    profileListHeadCancel.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
+                    profileListHeadMore.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_in));
+                    profileListHeadAddProfile.startAnimation(
+                            AnimationUtils.loadAnimation(MainActivity.this, R.anim.fade_out));
                 }
             }
+
+            mProfileListAdapter.notifyDataSetChanged();
         });
 
         LinearLayoutManager llm = new LinearLayoutManager(this);
@@ -269,73 +308,218 @@ public class MainActivity extends ProfileThemedActivity {
 
         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
-        profileListHeadMoreAndCancel
-                .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
+        profileListHeadMoreAndCancel.setOnClickListener(
+                (v) -> mProfileListAdapter.flipEditingProfiles());
+        if (drawerListener == null) {
+            drawerListener = new DrawerLayout.SimpleDrawerListener() {
+                @Override
+                public void onDrawerClosed(View drawerView) {
+                    super.onDrawerClosed(drawerView);
+                    mProfileListAdapter.setAnimationsEnabled(false);
+                    mProfileListAdapter.editingProfiles.setValue(false);
+                }
+                @Override
+                public void onDrawerOpened(View drawerView) {
+                    super.onDrawerOpened(drawerView);
+                    mProfileListAdapter.setAnimationsEnabled(true);
+                }
+            };
+            drawer.addDrawerListener(drawerListener);
+        }
+    }
+    private void scheduleDataRetrievalIfStale(Date lastUpdate) {
+        long now = new Date().getTime();
+        if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
+            if (lastUpdate == null)
+                debug("db::", "WEB data never fetched. scheduling a fetch");
+            else
+                debug("db", String.format(Locale.ENGLISH,
+                        "WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
+                        lastUpdate.getTime() / 1000f, now / 1000f));
+
+            Data.scheduleTransactionListRetrieval(this);
+        }
+    }
+    private void createShortcuts(List<MobileLedgerProfile> list) {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N_MR1)
+            return;
 
-        drawer.addDrawerListener(new DrawerLayout.SimpleDrawerListener() {
-            @Override
-            public void onDrawerClosed(View drawerView) {
-                super.onDrawerClosed(drawerView);
-                collapseProfileList();
+        ShortcutManager sm = getSystemService(ShortcutManager.class);
+        List<ShortcutInfo> shortcuts = new ArrayList<>();
+        int i = 0;
+        for (MobileLedgerProfile p : list) {
+            if (shortcuts.size() >= sm.getMaxShortcutCountPerActivity())
+                break;
+
+            if (!p.isPostingPermitted())
+                continue;
+
+            ShortcutInfo si =
+                    new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid()).setShortLabel(
+                            p.getName())
+                                                                                    .setIcon(
+                                                                                            Icon.createWithResource(
+                                                                                                    this,
+                                                                                                    R.drawable.svg_thick_plus_white))
+                                                                                    .setIntent(
+                                                                                            new Intent(
+                                                                                                    Intent.ACTION_VIEW,
+                                                                                                    null,
+                                                                                                    this,
+                                                                                                    NewTransactionActivity.class).putExtra(
+                                                                                                    "profile_uuid",
+                                                                                                    p.getUuid()))
+                                                                                    .setRank(i)
+                                                                                    .build();
+            shortcuts.add(si);
+            i++;
+        }
+        sm.setDynamicShortcuts(shortcuts);
+    }
+    private void onProfileListChanged(List<MobileLedgerProfile> newList) {
+        if (newList == null) {
+            // profiles not yet loaded from DB
+            findViewById(R.id.loading_layout).setVisibility(View.VISIBLE);
+            findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
+            findViewById(R.id.main_app_layout).setVisibility(View.GONE);
+            return;
+        }
+
+        if (newList.isEmpty()) {
+            findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
+            findViewById(R.id.main_app_layout).setVisibility(View.GONE);
+            findViewById(R.id.loading_layout).setVisibility(View.GONE);
+            return;
+        }
+
+        findViewById(R.id.main_app_layout).setVisibility(View.VISIBLE);
+        findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
+        findViewById(R.id.loading_layout).setVisibility(View.GONE);
+
+        findViewById(R.id.nav_profile_list).setMinimumHeight(
+                (int) (getResources().getDimension(R.dimen.thumb_row_height) * newList.size()));
+
+        debug("profiles", "profile list changed");
+        mProfileListAdapter.notifyDataSetChanged();
+
+        createShortcuts(newList);
+    }
+    /**
+     * called when the current profile has changed
+     */
+    private void onProfileChanged(MobileLedgerProfile profile) {
+        boolean haveProfile = profile != null;
+
+        if (haveProfile)
+            setTitle(profile.getName());
+        else
+            setTitle(R.string.app_name);
+
+        this.profile = profile;
+
+        int newProfileTheme = haveProfile ? profile.getThemeHue() : -1;
+        if (newProfileTheme != Colors.profileThemeId) {
+            debug("profiles",
+                    String.format(Locale.ENGLISH, "profile theme %d → %d", Colors.profileThemeId,
+                            newProfileTheme));
+            Colors.profileThemeId = newProfileTheme;
+            profileThemeChanged();
+            // profileThemeChanged would restart the activity, so no need to reload the
+            // data sets below
+            return;
+        }
+
+        findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
+        findViewById(R.id.pager_layout).setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
+
+        mProfileListAdapter.notifyDataSetChanged();
+
+        drawer.closeDrawers();
+
+        Data.transactions.clear();
+        debug("transactions", "requesting list reload");
+        TransactionListViewModel.scheduleTransactionListReload();
+
+        Data.accounts.clear();
+        AccountSummaryViewModel.scheduleAccountListReload();
+
+        if (haveProfile) {
+            if (profile.isPostingPermitted()) {
+                mToolbar.setSubtitle(null);
+                fab.show();
             }
-        });
+            else {
+                mToolbar.setSubtitle(R.string.profile_subtitle_read_only);
+                fab.hide();
+            }
+        }
+        else {
+            mToolbar.setSubtitle(null);
+            fab.hide();
+        }
+
+        updateLastUpdateTextFromDB();
+    }
+    private void updateLastUpdateDisplay(Date newValue) {
+        LinearLayout l = findViewById(R.id.transactions_last_update_layout);
+        TextView v = findViewById(R.id.transactions_last_update);
+        if (newValue == null) {
+            l.setVisibility(View.INVISIBLE);
+            debug("main", "no last update date :(");
+        }
+        else {
+            final String text = DateFormat.getDateTimeInstance()
+                                          .format(newValue);
+            v.setText(text);
+            l.setVisibility(View.VISIBLE);
+            debug("main", String.format("Date formatted: %s", text));
+        }
+
+        scheduleDataRetrievalIfStale(newValue);
     }
     private void profileThemeChanged() {
-        setupProfileColors();
-
-        Bundle bundle = new Bundle();
-        onSaveInstanceState(bundle);
-        // restart activity to reflect theme change
-        finish();
-        Intent intent = new Intent(this, this.getClass());
-        intent.putExtra(BUNDLE_SAVED_STATE, bundle);
-        startActivity(intent);
+        storeThemeIdInPrefs(profile.getThemeHue());
+
+        // un-hook all observed LiveData
+        Data.profile.removeObservers(this);
+        Data.profiles.removeObservers(this);
+        Data.lastUpdateDate.removeObservers(this);
+
+        recreate();
     }
-    @Override
-    protected void onResume() {
-        super.onResume();
-        setupProfile();
+    private void storeThemeIdInPrefs(int themeId) {
+        // store the new theme id in the preferences
+        SharedPreferences prefs = getPreferences(MODE_PRIVATE);
+        SharedPreferences.Editor e = prefs.edit();
+        e.putInt(PREF_THEME_ID, themeId);
+        e.apply();
     }
     public void startEditProfileActivity(MobileLedgerProfile profile) {
         Intent intent = new Intent(this, ProfileDetailActivity.class);
         Bundle args = new Bundle();
         if (profile != null) {
             int index = Data.getProfileIndex(profile);
-            if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
+            if (index != -1)
+                intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
         }
         intent.putExtras(args);
         startActivity(intent, args);
     }
     private void setupProfile() {
-        String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
-        MobileLedgerProfile profile;
-
-        profile = MobileLedgerProfile.loadAllFromDB(profileUUID);
-
-        if (Data.profiles.getList().isEmpty()) {
-            findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
-            findViewById(R.id.pager_layout).setVisibility(View.GONE);
-            return;
-        }
-
-        findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
-        findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
-
-        if (profile == null) profile = Data.profiles.get(0);
-
-        if (profile == null) throw new AssertionError("profile must have a value");
+        MLDB.getOption(MLDB.OPT_PROFILE_UUID, null, new GetOptCallback() {
+            @Override
+            protected void onResult(String profileUUID) {
+                MobileLedgerProfile startupProfile;
 
-        Data.setCurrentProfile(profile);
+                startupProfile = Data.getProfile(profileUUID);
+                Data.setCurrentProfile(startupProfile);
+            }
+        });
     }
     public void fabNewTransactionClicked(View view) {
         Intent intent = new Intent(this, NewTransactionActivity.class);
         startActivity(intent);
-        overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
-    }
-    public void navSettingsClicked(View view) {
-        Intent intent = new Intent(this, SettingsActivity.class);
-        startActivity(intent);
-        drawer.closeDrawers();
+        overridePendingTransition(R.anim.slide_in_up, R.anim.dummy);
     }
     public void markDrawerItemCurrent(int id) {
         TextView item = drawer.findViewById(id);
@@ -356,43 +540,22 @@ public class MainActivity extends ProfileThemedActivity {
     }
     private void showAccountSummaryFragment() {
         mViewPager.setCurrentItem(0, true);
-        TransactionListFragment.accountFilter.set(null);
-//        FragmentTransaction ft = fragmentManager.beginTransaction();
-//        accountSummaryFragment = new AccountSummaryFragment();
-//        ft.replace(R.id.root_frame, accountSummaryFragment);
-//        ft.commit();
-//        currentFragment = accountSummaryFragment;
+        Data.accountFilter.setValue(null);
     }
     public void onLatestTransactionsClicked(View view) {
         drawer.closeDrawers();
 
-        showTransactionsFragment(null);
+        showTransactionsFragment((String) null);
     }
-    private void resetFragmentBackStack() {
-//        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
+    private void showTransactionsFragment(String accName) {
+        Data.accountFilter.setValue(accName);
+        mViewPager.setCurrentItem(1, true);
     }
     private void showTransactionsFragment(LedgerAccount account) {
-        if (account != null) TransactionListFragment.accountFilter.set(account.getName());
-        mViewPager.setCurrentItem(1, true);
-//        FragmentTransaction ft = fragmentManager.beginTransaction();
-//        if (transactionListFragment == null) {
-//            Log.d("flow", "MainActivity creating TransactionListFragment");
-//            transactionListFragment = new TransactionListFragment();
-//        }
-//        Bundle bundle = new Bundle();
-//        if (account != null) {
-//            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
-//                    account.getName());
-//        }
-//        transactionListFragment.setArguments(bundle);
-//        ft.replace(R.id.root_frame, transactionListFragment);
-//        if (account != null)
-//            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
-//        ft.commit();
-//
-//        currentFragment = transactionListFragment;
+        showTransactionsFragment((account == null) ? null : account.getName());
     }
     public void showAccountTransactions(LedgerAccount account) {
+        mBackMeansToAccountList = true;
         showTransactionsFragment(account);
     }
     @Override
@@ -402,59 +565,67 @@ public class MainActivity extends ProfileThemedActivity {
             drawer.closeDrawer(GravityCompat.START);
         }
         else {
-            Log.d("fragments",
-                    String.format("manager stack: %d", fragmentManager.getBackStackEntryCount()));
-
-            super.onBackPressed();
-        }
-    }
-    public void updateLastUpdateTextFromDB() {
-        {
-            final MobileLedgerProfile profile = Data.profile.get();
-            long last_update =
-                    (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
-
-            Log.d("transactions", String.format("Last update = %d", last_update));
-            if (last_update == 0) {
-                Data.lastUpdateDate.set(null);
+            if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
+                Data.accountFilter.setValue(null);
+                showAccountSummaryFragment();
+                mBackMeansToAccountList = false;
             }
             else {
-                Data.lastUpdateDate.set(new Date(last_update));
+                debug("fragments", String.format(Locale.ENGLISH, "manager stack: %d",
+                        getSupportFragmentManager().getBackStackEntryCount()));
+
+                super.onBackPressed();
             }
         }
     }
-    public void scheduleTransactionListRetrieval() {
-        if (Data.profile.get() == null) return;
+    public void updateLastUpdateTextFromDB() {
+        if (profile == null)
+            return;
 
-        retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
+        long last_update = profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L);
 
-        retrieveTransactionsTask.execute();
+        debug("transactions", String.format(Locale.ENGLISH, "Last update = %d", last_update));
+        if (last_update == 0) {
+            Data.lastUpdateDate.postValue(null);
+        }
+        else {
+            Data.lastUpdateDate.postValue(new Date(last_update));
+        }
     }
     public void onStopTransactionRefreshClick(View view) {
-        Log.d("interactive", "Cancelling transactions refresh");
-        if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
+        debug("interactive", "Cancelling transactions refresh");
+        Data.stopTransactionsRetrieval();
         bTransactionListCancelDownload.setEnabled(false);
     }
     public void onRetrieveDone(String error) {
-        progressLayout.setVisibility(View.GONE);
+        Data.transactionRetrievalDone();
+        findViewById(R.id.transaction_progress_layout).setVisibility(View.GONE);
 
         if (error == null) {
             updateLastUpdateTextFromDB();
 
             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
+            TransactionListViewModel.scheduleTransactionListReload();
         }
-        else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
+        else
+            Snackbar.make(mViewPager, error, Snackbar.LENGTH_LONG)
+                    .show();
     }
     public void onRetrieveStart() {
+        ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
         bTransactionListCancelDownload.setEnabled(true);
-        progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
-        progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
+        ColorStateList csl = Colors.getColorStateList();
+        progressBar.setIndeterminateTintList(csl);
+        progressBar.setProgressTintList(csl);
         progressBar.setIndeterminate(true);
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
-        else progressBar.setProgress(0);
-        progressLayout.setVisibility(View.VISIBLE);
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
+            progressBar.setProgress(0, false);
+        else
+            progressBar.setProgress(0);
+        findViewById(R.id.transaction_progress_layout).setVisibility(View.VISIBLE);
     }
     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
+        ProgressBar progressBar = findViewById(R.id.transaction_list_progress_bar);
         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
             (progress.getTotal() == 0))
         {
@@ -468,99 +639,132 @@ public class MainActivity extends ProfileThemedActivity {
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
                 progressBar.setProgress(progress.getProgress(), true);
             }
-            else progressBar.setProgress(progress.getProgress());
+            else
+                progressBar.setProgress(progress.getProgress());
             progressBar.setIndeterminate(false);
         }
     }
     public void fabShouldShow() {
-        MobileLedgerProfile profile = Data.profile.get();
-        if ((profile != null) && profile.isPostingPermitted()) fab.show();
+        if ((profile != null) && profile.isPostingPermitted() && !drawer.isOpen())
+            fab.show();
+        else
+            fabHide();
     }
-    public void navProfilesHeadClicked(View view) {
-        if (profileListExpanded) {
-            collapseProfileList();
-        }
-        else {
-            expandProfileList();
-        }
+    public void fabHide() {
+        fab.hide();
     }
-    private void expandProfileList() {
-        profileListExpanded = true;
-
-
-        profileListContainer.setVisibility(View.VISIBLE);
-        profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
-        profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
-        profileListHeadMore.setVisibility(View.VISIBLE);
-        profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
-        findViewById(R.id.nav_profile_list).setMinimumHeight(
-                (int) (getResources().getDimension(R.dimen.thumb_row_height) *
-                       Data.profiles.size()));
-    }
-    private void collapseProfileList() {
-        profileListExpanded = false;
-
-        final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
-        animation.setAnimationListener(new Animation.AnimationListener() {
-            @Override
-            public void onAnimationStart(Animation animation) {
-
-            }
-            @Override
-            public void onAnimationEnd(Animation animation) {
-                profileListContainer.setVisibility(View.GONE);
-            }
-            @Override
-            public void onAnimationRepeat(Animation animation) {
-
-            }
-        });
-        mProfileListAdapter.stopEditingProfiles();
-
-        profileListContainer.startAnimation(animation);
-        profileListHeadArrow.setRotation(0f);
-        profileListHeadArrow
-                .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
-        profileListHeadMore.setVisibility(View.GONE);
-    }
-    public void onProfileRowClicked(View v) {
-        Data.setCurrentProfile((MobileLedgerProfile) v.getTag());
-    }
-    public void enableProfileModifications() {
-        profileModificationEnabled = true;
-        ViewGroup profileList = findViewById(R.id.nav_profile_list);
-        for (int i = 0; i < profileList.getChildCount(); i++) {
-            View aRow = profileList.getChildAt(i);
-            aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.VISIBLE);
-            aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.VISIBLE);
-        }
-        // FIXME enable rearranging
-
-    }
-    public void disableProfileModifications() {
-        profileModificationEnabled = false;
-        ViewGroup profileList = findViewById(R.id.nav_profile_list);
-        for (int i = 0; i < profileList.getChildCount(); i++) {
-            View aRow = profileList.getChildAt(i);
-            aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.GONE);
-            aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.INVISIBLE);
+    public void onAccountSummaryRowViewClicked(View view) {
+        ViewGroup row;
+        if (view.getId() == R.id.account_expander)
+            row = (ViewGroup) view.getParent()
+                                  .getParent();
+        else
+            row = (ViewGroup) view.getParent();
+
+        LedgerAccount acc = (LedgerAccount) row.getTag();
+        switch (view.getId()) {
+            case R.id.account_row_acc_name:
+            case R.id.account_expander:
+            case R.id.account_expander_container:
+                debug("accounts", "Account expander clicked");
+                if (!acc.hasSubAccounts())
+                    return;
+
+                boolean wasExpanded = acc.isExpanded();
+
+                View arrow = row.findViewById(R.id.account_expander_container);
+
+                arrow.clearAnimation();
+                ViewPropertyAnimator animator = arrow.animate();
+
+                acc.toggleExpanded();
+                DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
+                        new Object[]{acc.isExpanded(), acc.getName(), profile.getUuid()
+                        });
+
+                if (wasExpanded) {
+                    debug("accounts", String.format("Collapsing account '%s'", acc.getName()));
+                    arrow.setRotation(0);
+                    animator.rotationBy(180);
+
+                    // removing all child accounts from the view
+                    int start = -1, count = 0;
+                    try (LockHolder ignored = Data.accounts.lockForWriting()) {
+                        for (int i = 0; i < Data.accounts.size(); i++) {
+                            if (acc.isParentOf(Data.accounts.get(i))) {
+//                                debug("accounts", String.format("Found a child '%s' at position
+//                                %d",
+//                                        Data.accounts.get(i).getName(), i));
+                                if (start == -1) {
+                                    start = i;
+                                }
+                                count++;
+                            }
+                            else {
+                                if (start != -1) {
+//                                    debug("accounts",
+//                                            String.format("Found a non-child '%s' at position %d",
+//                                                    Data.accounts.get(i).getName(), i));
+                                    break;
+                                }
+                            }
+                        }
+
+                        if (start != -1) {
+                            for (int j = 0; j < count; j++) {
+//                                debug("accounts", String.format("Removing item %d: %s", start + j,
+//                                        Data.accounts.get(start).getName()));
+                                Data.accounts.removeQuietly(start);
+                            }
+
+                            mAccountSummaryFragment.modelAdapter.notifyItemRangeRemoved(start,
+                                    count);
+                        }
+                    }
+                }
+                else {
+                    debug("accounts", String.format("Expanding account '%s'", acc.getName()));
+                    arrow.setRotation(180);
+                    animator.rotationBy(-180);
+                    List<LedgerAccount> children = profile.loadVisibleChildAccountsOf(acc);
+                    try (LockHolder ignored = Data.accounts.lockForWriting()) {
+                        int parentPos = Data.accounts.indexOf(acc);
+                        if (parentPos != -1) {
+                            // may have disappeared in a concurrent refresh operation
+                            Data.accounts.addAllQuietly(parentPos + 1, children);
+                            mAccountSummaryFragment.modelAdapter.notifyItemRangeInserted(
+                                    parentPos + 1, children.size());
+                        }
+                    }
+                }
+                break;
+            case R.id.account_row_acc_amounts:
+                if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
+                    acc.toggleAmountsExpanded();
+                    DbOpQueue.add(
+                            "update accounts set amounts_expanded=? where name=? and profile=?",
+                            new Object[]{acc.amountsExpanded(), acc.getName(), profile.getUuid()
+                            });
+                    Data.accounts.triggerItemChangedNotification(acc);
+                }
+                break;
         }
-        // FIXME disable rearranging
-
     }
 
     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 
-        public SectionsPagerAdapter(FragmentManager fm) {
-            super(fm);
+        SectionsPagerAdapter(FragmentManager fm) {
+            super(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT);
         }
 
+        @NotNull
         @Override
         public Fragment getItem(int position) {
-            Log.d("main", String.format("Switching to fragment %d", position));
+            debug("main", String.format(Locale.ENGLISH, "Switching to fragment %d", position));
             switch (position) {
                 case 0:
-                    return new AccountSummaryFragment();
+//                    debug("flow", "Creating account summary fragment");
+                    return mAccountSummaryFragment = new AccountSummaryFragment();
                 case 1:
                     return new TransactionListFragment();
                 default:
@@ -574,5 +778,4 @@ public class MainActivity extends ProfileThemedActivity {
             return 2;
         }
     }
-
 }