Merge pull request #747 from Ullas-Aithal/feature/emptyStateChanges

Added feature to hide progress bar and add an instruction if there are no cards in the list #745 #746

app/src/main/java/org/shadowice/flocke/andotp/Activities/MainActivity.java

@@ -34,6 +34,8 @@ import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
 import android.preference.PreferenceManager;
+
+import androidx.annotation.Nullable;
 import androidx.core.view.GravityCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
 import androidx.appcompat.app.ActionBarDrawerToggle;
@@ -56,6 +58,7 @@ import android.widget.AdapterView;
 import android.widget.CheckedTextView;
 import android.widget.ListView;
 import android.widget.ProgressBar;
+import android.widget.TextView;
 import android.widget.Toast;
 
 import com.google.zxing.integration.android.IntentIntegrator;
@@ -114,6 +117,8 @@ public class MainActivity extends BaseActivity
     private String filterString;
 
     private CountDownTimer countDownTimer;
+    private ProgressBar progressBar;
+    private TextView emptyListView;
 
     // QR code scanning
     private void scanQRCode(){
@@ -245,8 +250,8 @@ public class MainActivity extends BaseActivity
             }
         });
 
-        final ProgressBar progressBar = findViewById(R.id.progressBar);
-        progressBar.setVisibility(settings.isHideGlobalTimeoutEnabled() ? View.GONE : View.VISIBLE);
+        progressBar = findViewById(R.id.progressBar);
+        emptyListView = findViewById(R.id.emptyListView);
 
         RecyclerView recList = findViewById(R.id.cardList);
         recList.setHasFixedSize(true);
@@ -256,6 +261,43 @@ public class MainActivity extends BaseActivity
 
         tagsDrawerAdapter = new TagsAdapter(this, new HashMap<String, Boolean>());
         adapter = new EntriesCardAdapter(this, tagsDrawerAdapter);
+        adapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
+            @Override
+            public void onChanged() {
+                super.onChanged();
+                hideProgressBar();
+            }
+
+            @Override
+            public void onItemRangeChanged(int positionStart, int itemCount) {
+                super.onItemRangeChanged(positionStart, itemCount);
+                hideProgressBar();
+            }
+
+            @Override
+            public void onItemRangeChanged(int positionStart, int itemCount, @Nullable Object payload) {
+                super.onItemRangeChanged(positionStart, itemCount, payload);
+                hideProgressBar();
+            }
+
+            @Override
+            public void onItemRangeInserted(int positionStart, int itemCount) {
+                super.onItemRangeInserted(positionStart, itemCount);
+                hideProgressBar();
+            }
+
+            @Override
+            public void onItemRangeRemoved(int positionStart, int itemCount) {
+                super.onItemRangeRemoved(positionStart, itemCount);
+                hideProgressBar();
+            }
+
+            @Override
+            public void onItemRangeMoved(int fromPosition, int toPosition, int itemCount) {
+                super.onItemRangeMoved(fromPosition, toPosition, itemCount);
+                hideProgressBar();
+            }
+        });
 
         if (savedInstanceState != null) {
             byte[] encKey = savedInstanceState.getByteArray("encKey");
@@ -898,4 +940,15 @@ public class MainActivity extends BaseActivity
         settings.unregisterPreferenceChangeListener(this);
         super.onDestroy();
     }
-}
+
+    /**
+     * This function will hide the progress bar if the token list is empty along with
+     * showing a view which has instruction on how to add the tokens
+     * */
+    private void hideProgressBar(){
+        int itemCount = adapter.getItemCount();
+        progressBar.setVisibility((settings.isHideGlobalTimeoutEnabled() || itemCount <= 0) ? View.GONE : View.VISIBLE);
+        emptyListView.setVisibility(itemCount > 0 ? View.GONE : View.VISIBLE);
+
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -66,7 +66,19 @@
                 android:paddingTop="@dimen/activity_margin_xsmall"
                 android:paddingBottom="@dimen/fab_recyclerview_padding"
                 android:clipToPadding="false" />
-
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:paddingStart="@dimen/activity_margin_large"
+                android:paddingEnd="@dimen/activity_margin_large"
+                android:clipToPadding="false"
+                android:text="@string/empty_list_view_text"
+                android:textSize="18sp"
+                android:textStyle="bold"
+                android:gravity="center"
+                tools:visibility="visible"
+                android:visibility="gone"
+                android:id="@+id/emptyListView"/>
             <include layout="@layout/component_tags" />
 
         </androidx.drawerlayout.widget.DrawerLayout>

app/src/main/res/values/strings_main.xml

@@ -114,4 +114,7 @@
     <string name="shortcut_name_scan_qr">Scan QR code</string>
     <string name="shortcut_name_import_qr">Import QR code</string>
     <string name="shortcut_name_enter_details">Enter details</string>
+
+    <!-- Empty List Text -->
+    <string name="empty_list_view_text">Start adding your tokens by pressing \"+\" at the bottom</string>
 </resources>