Show when no internet connection while required

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -113,6 +113,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     private ViewType viewType;
     private boolean outgoing;
     private int zoom;
+    private boolean internet;
     private IProperties properties;
 
     private boolean threading;
@@ -175,8 +176,10 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
         private TextView tvHeaders;
         private ProgressBar pbHeaders;
+        private TextView tvNoInternetHeaders;
 
         private RecyclerView rvAttachment;
+        private TextView tvNoInternetAttachments;
 
         private BottomNavigationView bnvActions;
 
@@ -185,6 +188,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         private ImageButton ibImages;
         private TextView tvBody;
         private ProgressBar pbBody;
+        private TextView tvNoInternetBody;
 
         private Group grpAddress;
         private Group grpHeaders;
@@ -230,6 +234,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
             tvHeaders = itemView.findViewById(R.id.tvHeaders);
             pbHeaders = itemView.findViewById(R.id.pbHeaders);
+            tvNoInternetHeaders = itemView.findViewById(R.id.tvNoInternetHeaders);
 
             rvAttachment = itemView.findViewById(R.id.rvAttachment);
             rvAttachment.setHasFixedSize(false);
@@ -240,6 +245,8 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             adapter = new AdapterAttachment(context, owner, true);
             rvAttachment.setAdapter(adapter);
 
+            tvNoInternetAttachments = itemView.findViewById(R.id.tvNoInternetAttachments);
+
             bnvActions = itemView.findViewById(R.id.bnvActions);
 
             btnHtml = itemView.findViewById(R.id.btnHtml);
@@ -247,6 +254,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             ibImages = itemView.findViewById(R.id.ibImages);
             tvBody = itemView.findViewById(R.id.tvBody);
             pbBody = itemView.findViewById(R.id.pbBody);
+            tvNoInternetBody = itemView.findViewById(R.id.tvNoInternetBody);
 
             grpAddress = itemView.findViewById(R.id.grpAddress);
             grpHeaders = itemView.findViewById(R.id.grpHeaders);
@@ -299,11 +307,16 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             tvKeywords.setVisibility(View.GONE);
 
             pbHeaders.setVisibility(View.GONE);
+            tvNoInternetHeaders.setVisibility(View.GONE);
+
+            tvNoInternetAttachments.setVisibility(View.GONE);
+
             bnvActions.setVisibility(View.GONE);
             btnHtml.setVisibility(View.GONE);
             ibQuotes.setVisibility(View.GONE);
             ibImages.setVisibility(View.GONE);
             pbBody.setVisibility(View.GONE);
+            tvNoInternetBody.setVisibility(View.GONE);
 
             grpAddress.setVisibility(View.GONE);
             ivAddContact.setVisibility(View.GONE);
@@ -412,6 +425,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
             ivAnswered.setVisibility(message.ui_answered ? View.VISIBLE : View.GONE);
             ivAttachments.setVisibility(message.attachments > 0 ? View.VISIBLE : View.GONE);
+            tvNoInternetAttachments.setVisibility(View.GONE);
             tvSubject.setText(message.subject);
 
             if (viewType == ViewType.THREAD || viewType == ViewType.SEARCH)
@@ -466,7 +480,15 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             grpAddress.setVisibility(viewType == ViewType.THREAD && show_expanded && show_addresses ? View.VISIBLE : View.GONE);
             tvKeywords.setVisibility(View.GONE);
             ivAddContact.setVisibility(viewType == ViewType.THREAD && show_expanded && show_addresses && contacts && message.from != null ? View.VISIBLE : View.GONE);
-            pbHeaders.setVisibility(View.GONE);
+
+            if (show_headers && show_expanded && message.headers == null) {
+                pbHeaders.setVisibility(internet ? View.VISIBLE : View.GONE);
+                tvNoInternetHeaders.setVisibility(internet ? View.GONE : View.VISIBLE);
+            } else {
+                pbHeaders.setVisibility(View.GONE);
+                tvNoInternetHeaders.setVisibility(View.GONE);
+            }
+
             grpHeaders.setVisibility(show_headers && show_expanded ? View.VISIBLE : View.GONE);
             grpAttachments.setVisibility(message.attachments > 0 && show_expanded ? View.VISIBLE : View.GONE);
             bnvActions.setVisibility(viewType == ViewType.THREAD && show_expanded ? View.INVISIBLE : View.GONE);
@@ -474,6 +496,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             ibQuotes.setVisibility(viewType == ViewType.THREAD && show_expanded ? View.INVISIBLE : View.GONE);
             ibImages.setVisibility(viewType == ViewType.THREAD && show_expanded ? View.INVISIBLE : View.GONE);
             pbBody.setVisibility(View.GONE);
+            tvNoInternetBody.setVisibility(View.GONE);
 
             bnvActions.setTag(null);
 
@@ -521,7 +544,10 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 Spanned body = properties.getBody(message.id);
                 tvBody.setText(body);
                 tvBody.setMovementMethod(new UrlHandler());
-                pbBody.setVisibility(View.VISIBLE);
+                if (internet || message.content)
+                    pbBody.setVisibility(View.VISIBLE);
+                else
+                    tvNoInternetBody.setVisibility(View.VISIBLE);
 
                 if (body == null && message.content) {
                     Bundle args = new Bundle();
@@ -538,6 +564,15 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
 
                         adapter.set(attachments);
 
+                        boolean downloading = false;
+                        for (EntityAttachment attachment : attachments)
+                            if (attachment.progress != null) {
+                                downloading = true;
+                                break;
+                            }
+
+                        tvNoInternetAttachments.setVisibility(downloading && !internet ? View.VISIBLE : View.GONE);
+
                         if (message.content) {
                             Bundle args = new Bundle();
                             args.putSerializable("message", message);
@@ -1228,7 +1263,10 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
             properties.setValue("headers", data.message.id, show_headers);
             if (show_headers && data.message.headers == null) {
                 grpHeaders.setVisibility(View.VISIBLE);
-                pbHeaders.setVisibility(View.VISIBLE);
+                if (internet)
+                    pbHeaders.setVisibility(View.VISIBLE);
+                else
+                    tvNoInternetHeaders.setVisibility(View.VISIBLE);
 
                 Bundle args = new Bundle();
                 args.putLong("id", data.message.id);
@@ -1644,6 +1682,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.viewType = viewType;
         this.outgoing = outgoing;
         this.zoom = zoom;
+        this.internet = (Helper.isMetered(context, false) != null);
         this.properties = properties;
 
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
@@ -1682,6 +1721,14 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         notifyDataSetChanged();
     }
 
+    void checkInternet() {
+        boolean internet = (Helper.isMetered(context, false) != null);
+        if (this.internet != internet) {
+            this.internet = internet;
+            notifyDataSetChanged();
+        }
+    }
+
     @Override
     public int getItemCount() {
         return differ.getItemCount();

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -30,6 +30,10 @@ import android.content.pm.PackageManager;
 import android.database.Cursor;
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
@@ -129,7 +133,9 @@ public class FragmentCompose extends FragmentEx {
     private ImageView ivBccAdd;
     private EditText etSubject;
     private RecyclerView rvAttachment;
+    private TextView tvNoInternetAttachments;
     private EditText etBody;
+    private TextView tvNoInternet;
     private TextView tvSignature;
     private TextView tvReference;
     private BottomNavigationView edit_bar;
@@ -178,7 +184,9 @@ public class FragmentCompose extends FragmentEx {
         ivBccAdd = view.findViewById(R.id.ivBccAdd);
         etSubject = view.findViewById(R.id.etSubject);
         rvAttachment = view.findViewById(R.id.rvAttachment);
+        tvNoInternetAttachments = view.findViewById(R.id.tvNoInternetAttachments);
         etBody = view.findViewById(R.id.etBody);
+        tvNoInternet = view.findViewById(R.id.tvNoInternet);
         tvSignature = view.findViewById(R.id.tvSignature);
         tvReference = view.findViewById(R.id.tvReference);
         edit_bar = view.findViewById(R.id.edit_bar);
@@ -302,12 +310,13 @@ public class FragmentCompose extends FragmentEx {
         setSubtitle(R.string.title_compose);
         tvExtraPrefix.setText(null);
         tvExtraSuffix.setText(null);
+        etBody.setText(null);
 
         grpHeader.setVisibility(View.GONE);
         grpExtra.setVisibility(View.GONE);
         grpAddresses.setVisibility(View.GONE);
         grpAttachments.setVisibility(View.GONE);
-        etBody.setVisibility(View.GONE);
+        tvNoInternet.setVisibility(View.GONE);
         grpSignature.setVisibility(View.GONE);
         grpReference.setVisibility(View.GONE);
         edit_bar.setVisibility(View.GONE);
@@ -386,6 +395,8 @@ public class FragmentCompose extends FragmentEx {
         adapter = new AdapterAttachment(getContext(), getViewLifecycleOwner(), false);
         rvAttachment.setAdapter(adapter);
 
+        tvNoInternetAttachments.setVisibility(View.GONE);
+
         pgpService = new OpenPgpServiceConnection(getContext(), "org.sufficientlysecure.keychain");
         pgpService.bindToService();
 
@@ -455,6 +466,11 @@ public class FragmentCompose extends FragmentEx {
     public void onResume() {
         super.onResume();
 
+        ConnectivityManager cm = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkRequest.Builder builder = new NetworkRequest.Builder();
+        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
+        cm.registerNetworkCallback(builder.build(), networkCallback);
+
         if (!pgpService.isBound())
             pgpService.bindToService();
     }
@@ -463,7 +479,48 @@ public class FragmentCompose extends FragmentEx {
     public void onPause() {
         if (autosave)
             onAction(R.id.action_save);
+
         super.onPause();
+
+        ConnectivityManager cm = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        cm.unregisterNetworkCallback(networkCallback);
+    }
+
+    ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
+        @Override
+        public void onAvailable(Network network) {
+            check();
+        }
+
+        @Override
+        public void onCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities) {
+            check();
+        }
+
+        @Override
+        public void onLost(Network network) {
+            check();
+        }
+
+        private void check() {
+            getActivity().runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+                        checkInternet();
+                }
+            });
+        }
+    };
+
+    private void checkInternet() {
+        boolean internet = (Helper.isMetered(getContext(), false) != null);
+
+        Boolean content = (Boolean) tvNoInternet.getTag();
+        tvNoInternet.setVisibility(!internet && content != null && !content ? View.VISIBLE : View.GONE);
+
+        Boolean downloading = (Boolean) rvAttachment.getTag();
+        tvNoInternetAttachments.setVisibility(!internet && downloading != null && downloading ? View.VISIBLE : View.GONE);
     }
 
     @Override
@@ -1448,6 +1505,16 @@ public class FragmentCompose extends FragmentEx {
 
                             adapter.set(attachments);
                             grpAttachments.setVisibility(attachments.size() > 0 ? View.VISIBLE : View.GONE);
+
+                            boolean downloading = false;
+                            for (EntityAttachment attachment : attachments)
+                                if (attachment.progress != null) {
+                                    downloading = true;
+                                    break;
+                                }
+
+                            rvAttachment.setTag(downloading);
+                            checkInternet();
                         }
                     });
 
@@ -1457,73 +1524,77 @@ public class FragmentCompose extends FragmentEx {
                     // Draft was deleted
                     if (draft == null || draft.ui_hide)
                         finish();
-                    else if (draft.content && state == State.NONE) {
+                    else {
-                        state = State.LOADING;
+                        tvNoInternet.setTag(draft.content);
-
+                        checkInternet();
-                        Bundle args = new Bundle();
-                        args.putLong("id", result.draft.id);
-                        if (result.draft.replying != null)
-                            args.putLong("reference", result.draft.replying);
-                        else if (result.draft.forwarding != null)
-                            args.putLong("reference", result.draft.forwarding);
-
-                        new SimpleTask<Spanned[]>() {
-                            @Override
-                            protected Spanned[] onLoad(final Context context, Bundle args) throws Throwable {
-                                long id = args.getLong("id");
-                                final long reference = args.getLong("reference", -1);
-
-                                String body = EntityMessage.read(context, id);
-                                String quote = (reference < 0 ? null : HtmlHelper.getQuote(context, reference, true));
-
-                                return new Spanned[]{
-                                        Html.fromHtml(body, cidGetter, null),
-                                        quote == null ? null : Html.fromHtml(quote,
-                                                new Html.ImageGetter() {
-                                                    @Override
-                                                    public Drawable getDrawable(String source) {
-                                                        return HtmlHelper.decodeImage(source, context, reference, false);
-                                                    }
-                                                },
-                                                null)};
-                            }
 
-                            @Override
+                        if (draft.content && state == State.NONE) {
-                            protected void onLoaded(Bundle args, Spanned[] texts) {
+                            state = State.LOADING;
-                                etBody.setText(texts[0]);
-                                etBody.setSelection(0);
-                                tvReference.setText(texts[1]);
-
-                                state = State.LOADED;
-                                autosave = true;
-
-                                pbWait.setVisibility(View.GONE);
-                                etBody.setVisibility(View.VISIBLE);
-                                grpReference.setVisibility(texts[1] == null ? View.GONE : View.VISIBLE);
-                                edit_bar.setVisibility(View.VISIBLE);
-                                bottom_navigation.setVisibility(View.VISIBLE);
-                                Helper.setViewsEnabled(view, true);
-
-                                getActivity().invalidateOptionsMenu();
-
-                                new Handler().post(new Runnable() {
-                                    @Override
-                                    public void run() {
-                                        if (TextUtils.isEmpty(etTo.getText()))
-                                            etTo.requestFocus();
-                                        else if (TextUtils.isEmpty(etSubject.getText()))
-                                            etSubject.requestFocus();
-                                        else
-                                            etBody.requestFocus();
-                                    }
-                                });
-                            }
 
-                            @Override
+                            Bundle args = new Bundle();
-                            protected void onException(Bundle args, Throwable ex) {
+                            args.putLong("id", result.draft.id);
-                                Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
+                            if (result.draft.replying != null)
-                            }
+                                args.putLong("reference", result.draft.replying);
-                        }.load(FragmentCompose.this, args);
+                            else if (result.draft.forwarding != null)
+                                args.putLong("reference", result.draft.forwarding);
+
+                            new SimpleTask<Spanned[]>() {
+                                @Override
+                                protected Spanned[] onLoad(final Context context, Bundle args) throws Throwable {
+                                    long id = args.getLong("id");
+                                    final long reference = args.getLong("reference", -1);
+
+                                    String body = EntityMessage.read(context, id);
+                                    String quote = (reference < 0 ? null : HtmlHelper.getQuote(context, reference, true));
+
+                                    return new Spanned[]{
+                                            Html.fromHtml(body, cidGetter, null),
+                                            quote == null ? null : Html.fromHtml(quote,
+                                                    new Html.ImageGetter() {
+                                                        @Override
+                                                        public Drawable getDrawable(String source) {
+                                                            return HtmlHelper.decodeImage(source, context, reference, false);
+                                                        }
+                                                    },
+                                                    null)};
+                                }
+
+                                @Override
+                                protected void onLoaded(Bundle args, Spanned[] texts) {
+                                    etBody.setText(texts[0]);
+                                    etBody.setSelection(0);
+                                    tvReference.setText(texts[1]);
+
+                                    state = State.LOADED;
+                                    autosave = true;
+
+                                    pbWait.setVisibility(View.GONE);
+                                    grpReference.setVisibility(texts[1] == null ? View.GONE : View.VISIBLE);
+                                    edit_bar.setVisibility(View.VISIBLE);
+                                    bottom_navigation.setVisibility(View.VISIBLE);
+                                    Helper.setViewsEnabled(view, true);
+
+                                    getActivity().invalidateOptionsMenu();
+
+                                    new Handler().post(new Runnable() {
+                                        @Override
+                                        public void run() {
+                                            if (TextUtils.isEmpty(etTo.getText()))
+                                                etTo.requestFocus();
+                                            else if (TextUtils.isEmpty(etSubject.getText()))
+                                                etSubject.requestFocus();
+                                            else
+                                                etBody.requestFocus();
+                                        }
+                                    });
+                                }
+
+                                @Override
+                                protected void onException(Bundle args, Throwable ex) {
+                                    Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
+                                }
+                            }.load(FragmentCompose.this, args);
+                        }
                     }
                 }
             });

app/src/main/java/eu/faircode/email/FragmentMessages.java

@@ -26,6 +26,10 @@ import android.content.SharedPreferences;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.drawable.Drawable;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
 import android.os.Bundle;
 import android.os.Handler;
 import android.preference.PreferenceManager;
@@ -1422,8 +1426,48 @@ public class FragmentMessages extends FragmentEx {
     public void onResume() {
         super.onResume();
         grpSupport.setVisibility(Helper.isPro(getContext()) ? View.GONE : View.VISIBLE);
+
+        ConnectivityManager cm = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        NetworkRequest.Builder builder = new NetworkRequest.Builder();
+        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
+        cm.registerNetworkCallback(builder.build(), networkCallback);
+    }
+
+    @Override
+    public void onPause() {
+        super.onPause();
+
+        ConnectivityManager cm = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+        cm.unregisterNetworkCallback(networkCallback);
     }
 
+    ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {
+        @Override
+        public void onAvailable(Network network) {
+            check();
+        }
+
+        @Override
+        public void onCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities) {
+            check();
+        }
+
+        @Override
+        public void onLost(Network network) {
+            check();
+        }
+
+        private void check() {
+            getActivity().runOnUiThread(new Runnable() {
+                @Override
+                public void run() {
+                    if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED))
+                        adapter.checkInternet();
+                }
+            });
+        }
+    };
+
     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.menu_messages, menu);

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

@@ -185,6 +185,16 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@+id/vSeparatorAttachments" />
 
+            <TextView
+                android:id="@+id/tvNoInternetAttachments"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/title_no_internet"
+                android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                app:layout_constraintEnd_toEndOf="@id/rvAttachment"
+                app:layout_constraintStart_toStartOf="@id/rvAttachment"
+                app:layout_constraintTop_toBottomOf="@id/rvAttachment" />
+
             <View
                 android:id="@+id/vSeparator"
                 android:layout_width="match_parent"
@@ -192,7 +202,7 @@
                 android:layout_marginTop="6dp"
                 android:background="?attr/colorSeparator"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toBottomOf="@+id/rvAttachment" />
+                app:layout_constraintTop_toBottomOf="@+id/tvNoInternetAttachments" />
 
             <EditText
                 android:id="@+id/etBody"
@@ -210,6 +220,17 @@
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/vSeparator" />
 
+            <TextView
+                android:id="@+id/tvNoInternet"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/title_no_internet"
+                android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                app:layout_constraintBottom_toBottomOf="@id/etBody"
+                app:layout_constraintEnd_toEndOf="@id/etBody"
+                app:layout_constraintStart_toStartOf="@id/etBody"
+                app:layout_constraintTop_toTopOf="@id/etBody" />
+
             <View
                 android:id="@+id/vSeparatorSignature"
                 android:layout_width="match_parent"

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

@@ -513,6 +513,17 @@
             app:layout_constraintStart_toStartOf="@id/tvHeaders"
             app:layout_constraintTop_toTopOf="@id/tvHeaders" />
 
+        <TextView
+            android:id="@+id/tvNoInternetHeaders"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintBottom_toBottomOf="@id/tvHeaders"
+            app:layout_constraintEnd_toEndOf="@id/tvHeaders"
+            app:layout_constraintStart_toStartOf="@id/tvHeaders"
+            app:layout_constraintTop_toTopOf="@id/tvHeaders" />
+
         <View
             android:id="@+id/vSeparatorAttachments"
             android:layout_width="0dp"
@@ -536,6 +547,16 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/vSeparatorAttachments" />
 
+        <TextView
+            android:id="@+id/tvNoInternetAttachments"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintEnd_toEndOf="@id/rvAttachment"
+            app:layout_constraintStart_toStartOf="@id/rvAttachment"
+            app:layout_constraintTop_toBottomOf="@id/rvAttachment" />
+
         <com.google.android.material.bottomnavigation.BottomNavigationView
             android:id="@+id/bnvActions"
             android:layout_width="0dp"
@@ -547,7 +568,7 @@
             app:labelVisibilityMode="labeled"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/rvAttachment"
+            app:layout_constraintTop_toBottomOf="@id/tvNoInternetAttachments"
             app:menu="@menu/action_message" />
 
         <Button
@@ -617,6 +638,17 @@
             app:layout_constraintStart_toStartOf="@id/tvBody"
             app:layout_constraintTop_toTopOf="@id/tvBody" />
 
+        <TextView
+            android:id="@+id/tvNoInternetBody"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintBottom_toBottomOf="@id/tvBody"
+            app:layout_constraintEnd_toEndOf="@id/tvBody"
+            app:layout_constraintStart_toStartOf="@id/tvBody"
+            app:layout_constraintTop_toTopOf="@id/tvBody" />
+
         <View
             android:id="@+id/vSeparator"
             android:layout_width="match_parent"

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

@@ -510,6 +510,17 @@
             app:layout_constraintStart_toStartOf="@id/tvHeaders"
             app:layout_constraintTop_toTopOf="@id/tvHeaders" />
 
+        <TextView
+            android:id="@+id/tvNoInternetHeaders"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintBottom_toBottomOf="@id/tvHeaders"
+            app:layout_constraintEnd_toEndOf="@id/tvHeaders"
+            app:layout_constraintStart_toStartOf="@id/tvHeaders"
+            app:layout_constraintTop_toTopOf="@id/tvHeaders" />
+
         <View
             android:id="@+id/vSeparatorAttachments"
             android:layout_width="0dp"
@@ -533,6 +544,16 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/vSeparatorAttachments" />
 
+        <TextView
+            android:id="@+id/tvNoInternetAttachments"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintEnd_toEndOf="@id/rvAttachment"
+            app:layout_constraintStart_toStartOf="@id/rvAttachment"
+            app:layout_constraintTop_toBottomOf="@id/rvAttachment" />
+
         <com.google.android.material.bottomnavigation.BottomNavigationView
             android:id="@+id/bnvActions"
             android:layout_width="0dp"
@@ -544,7 +565,7 @@
             app:labelVisibilityMode="labeled"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/rvAttachment"
+            app:layout_constraintTop_toBottomOf="@id/tvNoInternetAttachments"
             app:menu="@menu/action_message" />
 
         <Button
@@ -614,6 +635,17 @@
             app:layout_constraintStart_toStartOf="@id/tvBody"
             app:layout_constraintTop_toTopOf="@id/tvBody" />
 
+        <TextView
+            android:id="@+id/tvNoInternetBody"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/title_no_internet"
+            android:textAppearance="@style/TextAppearance.AppCompat.Small"
+            app:layout_constraintBottom_toBottomOf="@id/tvBody"
+            app:layout_constraintEnd_toEndOf="@id/tvBody"
+            app:layout_constraintStart_toStartOf="@id/tvBody"
+            app:layout_constraintTop_toTopOf="@id/tvBody" />
+
         <View
             android:id="@+id/vSeparator"
             android:layout_width="match_parent"

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

@@ -273,6 +273,7 @@
     <string name="title_no_saf">Storage access framework not available</string>
     <string name="title_no_stream">An outdated app sent a file path instead of a file stream</string>
     <string name="title_no_contacts">Contact picker not available</string>
+    <string name="title_no_internet">No internet connection</string>
     <string name="title_attachment_saved">Attachment saved</string>
     <string name="title_attachment_unavailable">Some attachments are not downloaded and will not be added, continue?</string>
     <string name="title_image_unavailable">Some images are not downloaded and will not be added, continue?</string>