fix observer leak

move observers from AccountSummaryFragment and TransactionListFragment
to MainActivity; drop them when the activity is destroyed

the observers were leaked leading to multiple duplicate change
notifications

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/account_summary/AccountSummaryFragment.java b/app/src/main/java/net/ktnx/mobileledger/ui/account_summary/AccountSummaryFragment.java
index 73a75af481414df38fd7607cb478bd0193ff7af8..14ec0209377a833d310cf15cbe0e1a412fd93c74 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/account_summary/AccountSummaryFragment.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/account_summary/AccountSummaryFragment.java
@@ -167,8 +167,6 @@ public class AccountSummaryFragment extends MobileLedgerListFragment {
 
         Data.accounts.addObserver(
                 (o, arg) -> mActivity.runOnUiThread(() -> modelAdapter.notifyDataSetChanged()));
-        Data.profile.addObserver((o, arg) -> mActivity.runOnUiThread(
-                AccountSummaryViewModel::scheduleAccountListReload));
         update_account_table();
     }
     private void update_account_table() {

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java b/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
index 3e774a04ce4883920cea6f2c5ce015c4f049dadf..0e51d8570a93aba86da9a1ef3875ba21afd77a46 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java
@@ -46,6 +46,7 @@ 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;
@@ -58,7 +59,6 @@ import java.lang.ref.WeakReference;
 import java.text.DateFormat;
 import java.util.Date;
 import java.util.List;
-import java.util.Observable;
 import java.util.Observer;
 
 import androidx.appcompat.app.ActionBarDrawerToggle;
@@ -96,26 +96,14 @@ public class MainActivity extends ProfileThemedActivity {
     private int mCurrentPage;
     private String mAccountFilter;
     private boolean mBackMeansToAccountList = false;
+    private Observer profileObserver;
+    private Observer profilesObserver;
+    private Observer lastUpdateDateObserver;
     @Override
     protected void onStart() {
         super.onStart();
 
         Log.d("flow", "MainActivity.onStart()");
-        setupProfile();
-
-        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);
         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 
@@ -128,6 +116,18 @@ public class MainActivity extends ProfileThemedActivity {
             outState.putString(STATE_ACC_FILTER, TransactionListFragment.accountFilter.get());
     }
     @Override
+    protected void onDestroy() {
+        mSectionsPagerAdapter = null;
+        Data.profile.deleteObserver(profileObserver);
+        profileObserver = null;
+        Data.profiles.deleteObserver(profilesObserver);
+        profilesObserver = null;
+        Data.lastUpdateDate.deleteObserver(lastUpdateDateObserver);
+        RecyclerView root = findViewById(R.id.nav_profile_list);
+        if (root != null) root.setAdapter(null);
+        super.onDestroy();
+    }
+    @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Log.d("flow", "MainActivity.onCreate()");
@@ -155,12 +155,12 @@ public class MainActivity extends ProfileThemedActivity {
         Toolbar toolbar = findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
 
-        Data.profile.addObserver((o, arg) -> {
+        profileObserver = (o, arg) -> {
             MobileLedgerProfile profile = Data.profile.get();
-            runOnUiThread(() -> {
-                if (profile == null) setTitle(R.string.app_name);
-                else setTitle(profile.getName());
-                updateLastUpdateTextFromDB();
+            MainActivity.this.runOnUiThread(() -> {
+                if (profile == null) MainActivity.this.setTitle(R.string.app_name);
+                else MainActivity.this.setTitle(profile.getName());
+                MainActivity.this.updateLastUpdateTextFromDB();
                 if (profile.isPostingPermitted()) {
                     toolbar.setSubtitle(null);
                     fab.show();
@@ -184,25 +184,35 @@ public class MainActivity extends ProfileThemedActivity {
                 }
                 else mProfileListAdapter.notifyDataSetChanged();
 
-                collapseProfileList();
+                MainActivity.this.collapseProfileList();
 
                 int newProfileTheme = profile.getThemeId();
                 if (newProfileTheme != Colors.profileThemeId) {
                     Log.d("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
                             newProfileTheme));
-                    profileThemeChanged();
+                    MainActivity.this.profileThemeChanged();
                     Colors.profileThemeId = newProfileTheme;
                 }
-                else
-                    drawer.closeDrawers();
+                else drawer.closeDrawers();
+
+                Log.d("transactions", "requesting list reload");
+                TransactionListViewModel.scheduleTransactionListReload();
+
+                AccountSummaryViewModel.scheduleAccountListReload();
+
             });
-        });
-        Data.profiles.addObserver((o, arg) -> {
+        };
+        Data.profile.addObserver(profileObserver);
+        profilesObserver = (o, arg) -> {
             findViewById(R.id.nav_profile_list).setMinimumHeight(
                     (int) (getResources().getDimension(R.dimen.thumb_row_height) *
                            Data.profiles.size()));
-            mProfileListAdapter.notifyDataSetChanged();
-        });
+
+            Log.d("profiles", "profile list changed");
+            if (arg == null) mProfileListAdapter.notifyDataSetChanged();
+            else mProfileListAdapter.notifyItemChanged((int) arg);
+        };
+        Data.profiles.addObserver(profilesObserver);
 
         ActionBarDrawerToggle toggle =
                 new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open,
@@ -256,10 +266,11 @@ public class MainActivity extends ProfileThemedActivity {
             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
         }
 
-        Data.lastUpdateDate.addObserver((o, arg) -> {
+        lastUpdateDateObserver = (o, arg) -> {
             Log.d("main", "lastUpdateDate changed");
             runOnUiThread(this::updateLastUpdateDisplay);
-        });
+        };
+        Data.lastUpdateDate.addObserver(lastUpdateDateObserver);
 
         updateLastUpdateDisplay();
 
@@ -275,26 +286,22 @@ public class MainActivity extends ProfileThemedActivity {
         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);
-                }
-                else {
-                    profileListHeadArrow.setRotation(180f);
-                    profileListHeadArrow.setVisibility(View.VISIBLE);
-                    profileListHeadCancel.setVisibility(View.GONE);
-                    profileListHeadMore.setVisibility(View.GONE);
-                    profileListHeadMore
-                            .setVisibility(profileListExpanded ? View.VISIBLE : View.GONE);
-                }
+        mProfileListAdapter.addEditingProfilesObserver((o, arg) -> {
+            if (mProfileListAdapter.isEditingProfiles()) {
+                profileListHeadArrow.clearAnimation();
+                profileListHeadArrow.setVisibility(View.GONE);
+                profileListHeadMore.setVisibility(View.GONE);
+                profileListHeadCancel.setVisibility(View.VISIBLE);
+            }
+            else {
+                profileListHeadArrow.setRotation(180f);
+                profileListHeadArrow.setVisibility(View.VISIBLE);
+                profileListHeadCancel.setVisibility(View.GONE);
+                profileListHeadMore.setVisibility(View.GONE);
+                profileListHeadMore.setVisibility(profileListExpanded ? View.VISIBLE : View.GONE);
             }
         });
 
@@ -315,6 +322,21 @@ public class MainActivity extends ProfileThemedActivity {
                 collapseProfileList();
             }
         });
+
+        setupProfile();
+
+        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();
+        }
     }
     private void updateLastUpdateDisplay() {
         LinearLayout l = findViewById(R.id.transactions_last_update_layout);

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/profiles/ProfilesRecyclerViewAdapter.java b/app/src/main/java/net/ktnx/mobileledger/ui/profiles/ProfilesRecyclerViewAdapter.java
index dfffc8f233743553a9d3689d4911d82673f90f64..eb3d0c85db5d0f87fb9012ce71a85e5701b9c12f 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/profiles/ProfilesRecyclerViewAdapter.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/profiles/ProfilesRecyclerViewAdapter.java
@@ -49,20 +49,10 @@ public class ProfilesRecyclerViewAdapter
         editProfile(view, profile);
     };
     private ObservableValue<Boolean> editingProfiles = new ObservableValue<>(false);
-    public void addEditingProfilesObserver(Observer o) {
-        editingProfiles.addObserver(o);
-    }
-    public void deleteEditingProfilesObserver(Observer o) {
-        editingProfiles.deleteObserver(o);
-    }
     private RecyclerView recyclerView;
     private ItemTouchHelper rearrangeHelper;
     public ProfilesRecyclerViewAdapter() {
-        Data.profiles.addObserver((o, arg) -> {
-            Log.d("profiles", "profile list changed");
-            if (arg == null) notifyDataSetChanged();
-            else notifyItemChanged((int) arg);
-        });
+        Log.d("flow", "ProfilesRecyclerViewAdapter.new()");
 
         ItemTouchHelper.Callback cb = new ItemTouchHelper.Callback() {
             @Override
@@ -86,6 +76,12 @@ public class ProfilesRecyclerViewAdapter
         };
         rearrangeHelper = new ItemTouchHelper(cb);
     }
+    public void addEditingProfilesObserver(Observer o) {
+        editingProfiles.addObserver(o);
+    }
+    public void deleteEditingProfilesObserver(Observer o) {
+        editingProfiles.deleteObserver(o);
+    }
     @Override
     public void onDetachedFromRecyclerView(@NonNull RecyclerView recyclerView) {
         rearrangeHelper.attachToRecyclerView(null);

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListFragment.java b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListFragment.java
index 82082a903efd3fc8e715dfaf11c3bac142d62e3b..631205f24448f0501aef8df95362bbf5db8c4802 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListFragment.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/transaction_list/TransactionListFragment.java
@@ -20,11 +20,6 @@ package net.ktnx.mobileledger.ui.transaction_list;
 import android.content.Context;
 import android.database.MatrixCursor;
 import android.os.Bundle;
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import androidx.recyclerview.widget.LinearLayoutManager;
-import androidx.recyclerview.widget.RecyclerView;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -36,6 +31,8 @@ import android.view.inputmethod.InputMethodManager;
 import android.widget.AutoCompleteTextView;
 import android.widget.Toast;
 
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+
 import net.ktnx.mobileledger.R;
 import net.ktnx.mobileledger.model.Data;
 import net.ktnx.mobileledger.ui.MobileLedgerListFragment;
@@ -48,6 +45,11 @@ import net.ktnx.mobileledger.utils.ObservableValue;
 import java.util.Observable;
 import java.util.Observer;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
 import static android.content.Context.INPUT_METHOD_SERVICE;
 
 public class TransactionListFragment extends MobileLedgerListFragment {
@@ -58,6 +60,7 @@ public class TransactionListFragment extends MobileLedgerListFragment {
     private View vAccountFilter;
     private AutoCompleteTextView accNameFilter;
     private Observer backgroundTaskCountObserver;
+    private Observer accountFilterObserver;
     private static void update(Observable o, Object arg) {
     }
     @Override
@@ -184,18 +187,16 @@ public class TransactionListFragment extends MobileLedgerListFragment {
             Globals.hideSoftKeyboard(mActivity);
         });
 
-        accountFilter.addObserver((o, arg) -> {
-            String accountName = accountFilter.get();
-            modelAdapter.setBoldAccountName(accountName);
-            setShowOnlyAccountName(accountName);
-            TransactionListViewModel.scheduleTransactionListReload();
-            if (menuTransactionListFilter != null) menuTransactionListFilter.setVisible(false);
-        });
-
-        Data.profile.addObserver((o, arg) -> mActivity.runOnUiThread(() -> {
-            Log.d("transactions", "requesting list reload");
-            TransactionListViewModel.scheduleTransactionListReload();
-        }));
+        if (accountFilterObserver == null) {
+            accountFilterObserver = (o, arg) -> {
+                String accountName = accountFilter.get();
+                modelAdapter.setBoldAccountName(accountName);
+                setShowOnlyAccountName(accountName);
+                TransactionListViewModel.scheduleTransactionListReload();
+                if (menuTransactionListFilter != null) menuTransactionListFilter.setVisible(false);
+            };
+            accountFilter.addObserver(accountFilterObserver);
+        }
 
         TransactionListViewModel.scheduleTransactionListReload();
         TransactionListViewModel.updating.addObserver(