Refactor the static snackbar out of the Domains Activity. https://redmine.stoutner...

diff --git a/app/src/main/java/com/stoutner/privacybrowser/activities/DomainsActivity.java b/app/src/main/java/com/stoutner/privacybrowser/activities/DomainsActivity.java
index d54499a218466e98adfe500447035a14ffa68760..5026e727070a0fd45aaad5ee8ceb09c36c435a43 100644 (file)
--- a/app/src/main/java/com/stoutner/privacybrowser/activities/DomainsActivity.java
+++ b/app/src/main/java/com/stoutner/privacybrowser/activities/DomainsActivity.java
@@ -59,7 +59,7 @@ import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
 
 import java.util.Objects;
 
-public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener {
+public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, DomainsListFragment.DismissSnackbarInterface {
     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
     public static boolean twoPanedMode;
 
@@ -69,17 +69,14 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
     public static MenuItem deleteMenuItem;
 
-    // `undoDeleteSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()` and `onBackPressed()`.
-    public static Snackbar undoDeleteSnackbar;
-
     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
     public static boolean dismissingSnackbar;
 
     // `closeActivityAfterDismissingSnackbar` is used in `onOptionsItemSelected()`, and `onBackPressed()`.
     private boolean closeActivityAfterDismissingSnackbar;
 
-    // `context` is used in `onCreate()`, `onOptionsItemSelected()`, and `onAddDomain()`.
-    private Context context;
+    // The undelete snackbar is used in `onOptionsItemSelected()` and `onBackPressed()`.
+    private Snackbar undoDeleteSnackbar;
 
     // `domainsDatabaseHelper` is used in `onCreate()`, `saveDomainSettings()`, and `onDestroy()`.
     private static DomainsDatabaseHelper domainsDatabaseHelper;
@@ -153,7 +150,6 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
         // Populate the class variables.
         coordinatorLayout = findViewById(R.id.domains_coordinatorlayout);
         resources = getResources();
-        context = this;
 
         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
         final Toolbar toolbar = findViewById(R.id.domains_toolbar);
@@ -169,7 +165,7 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
         actionBar.setDisplayHomeAsUpEnabled(true);
 
         // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
-        domainsDatabaseHelper = new DomainsDatabaseHelper(context, null, null, 0);
+        domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 
         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
@@ -431,7 +427,7 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
                                             Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 
                                             // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
-                                            CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(context, undoDeleteDomainsCursor, false) {
+                                            CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(getApplicationContext(), undoDeleteDomainsCursor, false) {
                                                 @Override
                                                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
                                                     // Inflate the individual item layout.  `false` does not attach it to the root.
@@ -759,7 +755,7 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 
         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
-        CursorAdapter domainsCursorAdapter = new CursorAdapter(context, domainsCursor, false) {
+        CursorAdapter domainsCursorAdapter = new CursorAdapter(getApplicationContext(), domainsCursor, false) {
             @Override
             public View newView(Context context, Cursor cursor, ViewGroup parent) {
                 // Inflate the individual item layout.  `false` does not attach it to the root.
@@ -831,6 +827,15 @@ public class DomainsActivity extends AppCompatActivity implements AddDomainDialo
         }
     }
 
+    @Override
+    public void dismissSnackbar() {
+        // Dismiss the undo delete snackbar if it is shown.
+        if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
+            // Dismiss the snackbar.
+            undoDeleteSnackbar.dismiss();
+        }
+    }
+
     @Override
     public void onDestroy() {
         // Close the domains database helper.

diff --git a/app/src/main/java/com/stoutner/privacybrowser/fragments/DomainsListFragment.java b/app/src/main/java/com/stoutner/privacybrowser/fragments/DomainsListFragment.java
index b28289b0dfcea6bcad8da2640681528b810adabb..41613170b0f59e68795191aa5bd4b223e6cce650 100644 (file)
--- a/app/src/main/java/com/stoutner/privacybrowser/fragments/DomainsListFragment.java
+++ b/app/src/main/java/com/stoutner/privacybrowser/fragments/DomainsListFragment.java
@@ -19,6 +19,7 @@
 
 package com.stoutner.privacybrowser.fragments;
 
+import android.content.Context;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -37,6 +38,22 @@ import com.stoutner.privacybrowser.activities.DomainsActivity;
 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
 
 public class DomainsListFragment extends Fragment {
+    // Instantiate the dismiss snackbar interface handle.
+    private DismissSnackbarInterface dismissSnackbarInterface;
+
+    // Define the public dismiss snackbar interface.
+    public interface DismissSnackbarInterface {
+        void dismissSnackbar();
+    }
+
+    public void onAttach(Context context) {
+        // Run the default commands.
+        super.onAttach(context);
+
+        // Get a handle for the dismiss snackbar interface.
+        dismissSnackbarInterface = (DismissSnackbarInterface) context;
+    }
+
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         // Inflate `domains_list_fragment`.  `false` does not attach it to the root `container`.
         View domainsListFragmentView = inflater.inflate(R.layout.domains_list_fragment, container, false);
@@ -47,16 +64,12 @@ public class DomainsListFragment extends Fragment {
         // Remove the incorrect lint error below that `.getSupportFragmentManager()` might be null.
         assert getActivity() != null;
 
-        // Get a handle for `supportFragmentManager`.
+        // Get a handle for the support fragment manager.
         final FragmentManager supportFragmentManager = getActivity().getSupportFragmentManager();
 
         domainsListView.setOnItemClickListener((AdapterView<?> parent, View view, int position, long id) -> {
-            // Dismiss `undoDeleteSnackbar` if it is currently displayed (because a domain has just been deleted).
-            if ((DomainsActivity.undoDeleteSnackbar != null) && (DomainsActivity.undoDeleteSnackbar.isShown())) {
-                DomainsActivity.dismissingSnackbar = true;
-
-                DomainsActivity.undoDeleteSnackbar.dismiss();
-            }
+            // Dismiss the snackbar if it is visible.
+            dismissSnackbarInterface.dismissSnackbar();
 
             // Save the current domain settings if operating in two-paned mode and a domain is currently selected.
             if (DomainsActivity.twoPanedMode && DomainsActivity.deleteMenuItem.isEnabled()) {