From 6480fef315eb465c8c350cec27ccb49cf4a3617d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Sch=C3=A4ttgen?= <michael@schattgen.me>
Date: Sat, 7 Sep 2019 01:04:03 +0200
Subject: [PATCH] Add placeholder for empty recyclerview

---
 .../aegis/ui/views/EntryListView.java         | 18 +++++++-
 .../res/layout/fragment_entry_list_view.xml   | 43 +++++++++++++++++++
 app/src/main/res/values/strings.xml           |  2 +
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryListView.java b/app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryListView.java
index a385b5c0..febb6bf8 100644
--- a/app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryListView.java
+++ b/app/src/main/java/com/beemdevelopment/aegis/ui/views/EntryListView.java
@@ -8,7 +8,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.view.animation.AnimationUtils;
 import android.view.animation.LayoutAnimationController;
-import android.widget.Toast;
+import android.widget.LinearLayout;
 
 import com.beemdevelopment.aegis.R;
 import com.beemdevelopment.aegis.SortCategory;
@@ -47,6 +47,7 @@ public class EntryListView extends Fragment implements EntryAdapter.Listener {
     private PeriodProgressBar _progressBar;
     private boolean _showProgress;
     private ViewMode _viewMode;
+    private LinearLayout _emptyStateView;
 
     private UiRefresher _refresher;
 
@@ -107,6 +108,8 @@ public class EntryListView extends Fragment implements EntryAdapter.Listener {
             }
         });
 
+        _emptyStateView = view.findViewById(R.id.vEmptyList);
+
         return view;
     }
 
@@ -218,14 +221,17 @@ public class EntryListView extends Fragment implements EntryAdapter.Listener {
 
     public void addEntry(DatabaseEntry entry) {
         _adapter.addEntry(entry);
+        updateEmptyState();
     }
 
     public void addEntries(List<DatabaseEntry> entries) {
         _adapter.addEntries(entries);
+        updateEmptyState();
     }
 
     public void removeEntry(DatabaseEntry entry) {
         _adapter.removeEntry(entry);
+        updateEmptyState();
     }
 
     public void clearEntries() {
@@ -267,6 +273,16 @@ public class EntryListView extends Fragment implements EntryAdapter.Listener {
         _recyclerView.addItemDecoration(_dividerDecoration);
     }
 
+    private void updateEmptyState() {
+        if (_adapter.getItemCount() > 0) {
+            _recyclerView.setVisibility(View.VISIBLE);
+            _emptyStateView.setVisibility(View.GONE);
+        } else {
+            _recyclerView.setVisibility(View.GONE);
+            _emptyStateView.setVisibility(View.VISIBLE);
+        }
+    }
+
     public interface Listener {
         void onEntryClick(DatabaseEntry entry);
         void onEntryMove(DatabaseEntry entry1, DatabaseEntry entry2);
diff --git a/app/src/main/res/layout/fragment_entry_list_view.xml b/app/src/main/res/layout/fragment_entry_list_view.xml
index a9217038..6065a627 100644
--- a/app/src/main/res/layout/fragment_entry_list_view.xml
+++ b/app/src/main/res/layout/fragment_entry_list_view.xml
@@ -22,4 +22,47 @@
         android:id="@+id/rvKeyProfiles"
         android:layoutAnimation="@anim/layout_animation_fall_down"
         android:layout_weight="1"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center|fill_vertical"
+        android:id="@+id/vEmptyList"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:orientation="vertical"
+            android:paddingBottom="150dp">
+
+            <ImageView
+                android:id="@+id/imageView"
+                android:layout_width="50dp"
+                android:layout_height="50dp"
+                android:src="@drawable/ic_qrcode_scan"
+                android:tint="?attr/primaryText" />
+
+            <TextView
+                android:id="@+id/textView"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/empty_list_title"
+                android:paddingTop="17dp"
+                android:textColor="?attr/primaryText"
+                android:textSize="18sp" />
+
+            <TextView
+                android:id="@+id/textView5"
+                android:layout_width="300dp"
+                android:layout_height="wrap_content"
+                android:lineSpacingExtra="5dp"
+                android:paddingTop="7dp"
+                android:text="@string/empty_list"
+                android:textAlignment="center" />
+        </LinearLayout>
+
+    </LinearLayout>
 </LinearLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2865d86f..b9a8eb7a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -171,4 +171,6 @@
     <string name="channel_name_lock_status">Lock status</string>
     <string name="channel_description_lock_status">Aegis can create a persistent notification to notify you when the vault is locked</string>
     <string name="vault_unlocked_state">Vault is unlocked. Tap here to lock.</string>
+    <string name="empty_list">There are no codes to be shown. Start adding entries by tapping the plus sign in the bottom right corner</string>
+    <string name="empty_list_title">No entries found</string>
 </resources>