support navigation via nav bar

src/conversations/java/eu/siacs/conversations/ui/ManageAccountActivity.java

@@ -1,5 +1,7 @@
 package eu.siacs.conversations.ui;
 
+import static android.view.View.VISIBLE;
+
 import android.content.ActivityNotFoundException;
 import android.content.Intent;
 import android.os.Bundle;
@@ -40,6 +42,9 @@ import eu.siacs.conversations.xmpp.XmppConnection;
 import static eu.siacs.conversations.utils.PermissionUtils.allGranted;
 import static eu.siacs.conversations.utils.PermissionUtils.writeGranted;
 
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.google.android.material.navigation.NavigationBarView;
+
 public class ManageAccountActivity extends XmppActivity implements OnAccountUpdate, KeyChainAliasCallback, XmppConnectionService.OnAccountCreated, AccountAdapter.OnTglAccountState {
 
     private final String STATE_SELECTED_ACCOUNT = "selected_account";
@@ -68,9 +73,10 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
             accountList.addAll(xmppConnectionService.getAccounts());
         }
         ActionBar actionBar = getSupportActionBar();
+        boolean showNavBar = findViewById(R.id.bottom_navigation).getVisibility() == VISIBLE;
         if (actionBar != null) {
-            actionBar.setHomeButtonEnabled(this.accountList.size() > 0);
+            actionBar.setHomeButtonEnabled(this.accountList.size() > 0 && !showNavBar);
-            actionBar.setDisplayHomeAsUpEnabled(this.accountList.size() > 0);
+            actionBar.setDisplayHomeAsUpEnabled(this.accountList.size() > 0 && !showNavBar);
         }
         invalidateOptionsMenu();
         mAccountAdapter.notifyDataSetChanged();
@@ -100,6 +106,30 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
         accountListView.setAdapter(this.mAccountAdapter);
         accountListView.setOnItemClickListener((arg0, view, position, arg3) -> switchToAccount(accountList.get(position)));
         registerForContextMenu(accountListView);
+
+        BottomNavigationView bottomNavigationView=findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setOnItemSelectedListener(item -> {
+
+            switch (item.getItemId()) {
+                case R.id.chats -> {
+                    startActivity(new Intent(getApplicationContext(), ConversationsActivity.class));
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                case R.id.contactslist -> {
+                    Intent i = new Intent(getApplicationContext(), StartConversationActivity.class);
+                    i.putExtra("show_nav_bar", true);
+                    startActivity(i);
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                case R.id.manageaccounts -> {
+                    return true;
+                }
+                default ->
+                        throw new IllegalStateException("Unexpected value: " + item.getItemId());
+            }
+        });
     }
 
     @Override
@@ -109,6 +139,15 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
         if (this.mTheme != theme) {
             recreate();
         }
+
+        BottomNavigationView bottomNavigationView=findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setSelectedItemId(R.id.manageaccounts);
+
+        if (getBooleanPreference("show_nav_bar", R.bool.show_nav_bar) && getIntent().getBooleanExtra("show_nav_bar", false)) {
+            bottomNavigationView.setVisibility(VISIBLE);
+        } else {
+            bottomNavigationView.setVisibility(View.GONE);
+        }
     }
 
     @Override
@@ -147,6 +186,18 @@ public class ManageAccountActivity extends XmppActivity implements OnAccountUpda
         menu.setHeaderTitle(this.selectedAccount.getJid().asBareJid().toEscapedString());
     }
 
+    @Override
+    public void onBackPressed() {
+        if (findViewById(R.id.bottom_navigation).getVisibility() == VISIBLE) {
+            Intent intent = new Intent(this, ConversationsActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
+            startActivity(intent);
+            overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+        }
+
+        super.onBackPressed();
+    }
+
     @Override
     void onBackendConnected() {
         if (selectedAccountJid != null) {

src/main/java/eu/siacs/conversations/ui/ConversationFragment.java

@@ -1418,6 +1418,14 @@ public class ConversationFragment extends XmppFragment
                 menuTogglePinned.setTitle(R.string.add_to_favorites);
             }
         }
+
+        Fragment secondaryFragment = activity.getFragmentManager().findFragmentById(R.id.secondary_fragment);
+        if (secondaryFragment instanceof ConversationFragment) {
+            activity.showNavigationBar();
+        } else {
+            activity.hideNavigationBar();
+        }
+
         super.onCreateOptionsMenu(menu, menuInflater);
     }
 

src/main/java/eu/siacs/conversations/ui/ConversationsActivity.java

@@ -31,6 +31,7 @@ package eu.siacs.conversations.ui;
 
 
 import static eu.siacs.conversations.ui.ConversationFragment.REQUEST_DECRYPT_PGP;
+import static eu.siacs.conversations.utils.AccountUtils.MANAGE_ACCOUNT_ACTIVITY;
 
 import android.Manifest;
 import android.annotation.SuppressLint;
@@ -61,6 +62,9 @@ import androidx.appcompat.app.AlertDialog;
 import androidx.core.app.ActivityCompat;
 import androidx.databinding.DataBindingUtil;
 
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.google.android.material.navigation.NavigationBarView;
+
 import org.openintents.openpgp.util.OpenPgpApi;
 
 import java.util.Arrays;
@@ -397,6 +401,33 @@ public class ConversationsActivity extends XmppActivity implements OnConversatio
             pendingViewIntent.push(intent);
             setIntent(createLauncherIntent(this));
         }
+
+        BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setOnItemSelectedListener(item -> {
+
+            switch (item.getItemId()) {
+                case R.id.chats -> {
+                    return true;
+                }
+                case R.id.contactslist -> {
+                    Intent i = new Intent(getApplicationContext(), StartConversationActivity.class);
+                    i.putExtra("show_nav_bar", true);
+                    startActivity(i);
+
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                case R.id.manageaccounts -> {
+                    Intent i = new Intent(getApplicationContext(), MANAGE_ACCOUNT_ACTIVITY);
+                    i.putExtra("show_nav_bar", true);
+                    startActivity(i);
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                default ->
+                        throw new IllegalStateException("Unexpected value: " + item.getItemId());
+            }
+        });
     }
 
     @Override
@@ -432,6 +463,24 @@ public class ConversationsActivity extends XmppActivity implements OnConversatio
         }
     }
 
+    public boolean navigationBarVisible() {
+        return findViewById(R.id.bottom_navigation).getVisibility() == View.VISIBLE;
+    }
+
+    public boolean showNavigationBar() {
+        if (!getBooleanPreference("show_nav_bar", R.bool.show_nav_bar)) {
+            findViewById(R.id.bottom_navigation).setVisibility(View.GONE);
+            return false;
+        }
+
+        findViewById(R.id.bottom_navigation).setVisibility(View.VISIBLE);
+        return true;
+    }
+
+    public void hideNavigationBar() {
+        findViewById(R.id.bottom_navigation).setVisibility(View.GONE);
+    }
+
     @Nullable
     public View getFragmentHostView() {
         if (binding.secondaryFragment != null) {
@@ -611,6 +660,9 @@ public class ConversationsActivity extends XmppActivity implements OnConversatio
             this.mSkipBackgroundBinding = false;
         }
         mRedirectInProcess.set(false);
+
+        BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setSelectedItemId(R.id.chats);
     }
 
     @Override

src/main/java/eu/siacs/conversations/ui/ConversationsOverviewFragment.java

@@ -422,6 +422,21 @@ public class ConversationsOverviewFragment extends XmppFragment {
 		}
 	}
 
+	@Override
+	public void onPrepareOptionsMenu(Menu menu) {
+		super.onPrepareOptionsMenu(menu);
+
+		boolean navBarVisible = activity instanceof ConversationsActivity && ((ConversationsActivity) activity).navigationBarVisible();
+		MenuItem manageAccount = menu.findItem(R.id.action_account);
+		MenuItem manageAccounts = menu.findItem(R.id.action_accounts);
+		if (navBarVisible) {
+			manageAccount.setVisible(false);
+			manageAccounts.setVisible(false);
+		} else {
+			AccountUtils.showHideMenuItems(menu);
+		}
+	}
+
 	@Override
 	public void onStart() {
 		super.onStart();
@@ -429,6 +444,16 @@ public class ConversationsOverviewFragment extends XmppFragment {
 		if (activity.xmppConnectionService != null) {
 			refresh();
 		}
+
+		if (activity instanceof ConversationsActivity) {
+			boolean showed = ((ConversationsActivity) activity).showNavigationBar();
+
+			if (showed) {
+				this.binding.fab.setVisibility(View.GONE);
+			} else {
+				this.binding.fab.setVisibility(View.VISIBLE);
+			}
+		}
 	}
 
 	@Override

src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java

@@ -1,5 +1,9 @@
 package eu.siacs.conversations.ui;
 
+import static android.view.View.VISIBLE;
+
+import static eu.siacs.conversations.utils.AccountUtils.MANAGE_ACCOUNT_ACTIVITY;
+
 import android.Manifest;
 import android.annotation.SuppressLint;
 import android.app.Dialog;
@@ -63,6 +67,7 @@ import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 import androidx.viewpager.widget.PagerAdapter;
 import androidx.viewpager.widget.ViewPager;
 
+import com.google.android.material.bottomnavigation.BottomNavigationView;
 import com.google.android.material.textfield.TextInputLayout;
 import com.leinardi.android.speeddial.SpeedDialActionItem;
 import com.leinardi.android.speeddial.SpeedDialView;
@@ -374,6 +379,30 @@ public class StartConversationActivity extends XmppActivity implements XmppConne
             }
             return false;
         });
+
+        BottomNavigationView bottomNavigationView=findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setOnItemSelectedListener(item -> {
+
+            switch (item.getItemId()) {
+                case R.id.chats -> {
+                    startActivity(new Intent(getApplicationContext(), ConversationsActivity.class));
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                case R.id.contactslist -> {
+                    return true;
+                }
+                case R.id.manageaccounts -> {
+                    Intent i = new Intent(getApplicationContext(), MANAGE_ACCOUNT_ACTIVITY);
+                    i.putExtra("show_nav_bar", true);
+                    startActivity(i);
+                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+                    return true;
+                }
+                default ->
+                        throw new IllegalStateException("Unexpected value: " + item.getItemId());
+            }
+        });
     }
 
     private void inflateFab(final SpeedDialView speedDialView, final @MenuRes int menuRes) {
@@ -430,6 +459,15 @@ public class StartConversationActivity extends XmppActivity implements XmppConne
         }
         mConferenceAdapter.refreshSettings();
         mContactsAdapter.refreshSettings();
+
+        BottomNavigationView bottomNavigationView=findViewById(R.id.bottom_navigation);
+        bottomNavigationView.setSelectedItemId(R.id.contactslist);
+
+        if (getBooleanPreference("show_nav_bar", R.bool.show_nav_bar) && getIntent().getBooleanExtra("show_nav_bar", false)) {
+            bottomNavigationView.setVisibility(VISIBLE);
+        } else {
+            bottomNavigationView.setVisibility(View.GONE);
+        }
     }
 
     @Override
@@ -769,6 +807,22 @@ public class StartConversationActivity extends XmppActivity implements XmppConne
         return super.onCreateOptionsMenu(menu);
     }
 
+    @Override
+    public boolean onPrepareOptionsMenu(Menu menu) {
+        boolean res = super.onPrepareOptionsMenu(menu);
+        boolean navBarVisible = binding.bottomNavigation.getVisibility() == VISIBLE;
+        MenuItem manageAccount = menu.findItem(R.id.action_account);
+        MenuItem manageAccounts = menu.findItem(R.id.action_accounts);
+        if (navBarVisible) {
+            manageAccount.setVisible(false);
+            manageAccounts.setVisible(false);
+        } else {
+            AccountUtils.showHideMenuItems(menu);
+        }
+
+        return res;
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         if (MenuDoubleTabUtil.shouldIgnoreTap()) {
@@ -916,8 +970,9 @@ public class StartConversationActivity extends XmppActivity implements XmppConne
             return;
         }
         boolean openConversations = !createdByViewIntent && !xmppConnectionService.isConversationsListEmpty(null);
-        actionBar.setDisplayHomeAsUpEnabled(openConversations);
+        boolean showNavBar = binding.bottomNavigation.getVisibility() == VISIBLE;
-        actionBar.setDisplayHomeAsUpEnabled(openConversations);
+        actionBar.setDisplayHomeAsUpEnabled(openConversations && !showNavBar);
+        actionBar.setDisplayHomeAsUpEnabled(openConversations && !showNavBar);
 
     }
 
@@ -1149,6 +1204,9 @@ public class StartConversationActivity extends XmppActivity implements XmppConne
             Intent intent = new Intent(this, ConversationsActivity.class);
             intent.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
             startActivity(intent);
+            if (binding.bottomNavigation.getVisibility() == VISIBLE) {
+                overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
+            }
         }
         finish();
     }

src/main/res/animator/fade_in.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha xmlns:android="http://schemas.android.com/apk/res/android"
+        android:duration="200"
+        android:fromAlpha="0.0"
+        android:interpolator="@android:anim/accelerate_interpolator"
+        android:toAlpha="1.0" />
+</set>

src/main/res/animator/fade_left_in.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="200"
+    android:shareInterpolator="@android:anim/accelerate_decelerate_interpolator">
+    <objectAnimator
+        android:propertyName="translationX"
+        android:valueFrom="-200"
+        android:valueTo="0"
+        android:valueType="floatType" />
+    <objectAnimator
+        android:propertyName="alpha"
+        android:valueFrom="0"
+        android:valueTo="1"
+        android:valueType="floatType" />
+</set>

src/main/res/animator/fade_left_out.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="200"
+    android:shareInterpolator="@android:anim/accelerate_decelerate_interpolator">
+    <objectAnimator
+        android:propertyName="translationX"
+        android:valueFrom="0"
+        android:valueTo="-200"
+        android:valueType="floatType" />
+    <objectAnimator
+        android:propertyName="alpha"
+        android:valueFrom="1"
+        android:valueTo="0"
+        android:valueType="floatType" />
+</set>

src/main/res/animator/fade_out.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <alpha xmlns:android="http://schemas.android.com/apk/res/android"
+        android:duration="200"
+        android:fromAlpha="1.0"
+        android:interpolator="@android:anim/anticipate_interpolator"
+        android:toAlpha="0.0" />
+</set>

src/main/res/animator/fade_right_in.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="200"
+    android:shareInterpolator="@android:anim/accelerate_decelerate_interpolator">
+    <objectAnimator
+        android:propertyName="translationX"
+        android:valueFrom="200"
+        android:valueTo="0"
+        android:valueType="floatType" />
+    <objectAnimator
+        android:propertyName="alpha"
+        android:valueFrom="0"
+        android:valueTo="1"
+        android:valueType="floatType" />
+</set>

src/main/res/animator/fade_right_out.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    android:duration="200"
+    android:shareInterpolator="@android:anim/accelerate_decelerate_interpolator">
+    <objectAnimator
+        android:propertyName="translationX"
+        android:valueFrom="0"
+        android:valueTo="200"
+        android:valueType="floatType" />
+    <objectAnimator
+        android:propertyName="alpha"
+        android:valueFrom="1"
+        android:valueTo="0"
+        android:valueType="floatType" />
+</set>

src/main/res/drawable/accounts_selected_black_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10s10,-4.48 10,-10S17.52,2 12,2zM12,6c1.93,0 3.5,1.57 3.5,3.5S13.93,13 12,13s-3.5,-1.57 -3.5,-3.5S10.07,6 12,6zM12,20c-2.03,0 -4.43,-0.82 -6.14,-2.88C7.55,15.8 9.68,15 12,15s4.45,0.8 6.14,2.12C16.43,19.18 14.03,20 12,20z"/>
+</vector>

src/main/res/drawable/accounts_selected_white_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10s10,-4.48 10,-10S17.52,2 12,2zM12,6c1.93,0 3.5,1.57 3.5,3.5S13.93,13 12,13s-3.5,-1.57 -3.5,-3.5S10.07,6 12,6zM12,20c-2.03,0 -4.43,-0.82 -6.14,-2.88C7.55,15.8 9.68,15 12,15s4.45,0.8 6.14,2.12C16.43,19.18 14.03,20 12,20z"/>
+</vector>

src/main/res/drawable/chat_selected_black_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#000000" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M20,2L4,2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM6,9h12v2L6,11L6,9zM14,14L6,14v-2h8v2zM18,8L6,8L6,6h12v2z"/>
+</vector>

src/main/res/drawable/chat_selected_white_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#FFFFFF" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M20,2L4,2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM6,9h12v2L6,11L6,9zM14,14L6,14v-2h8v2zM18,8L6,8L6,6h12v2z"/>
+</vector>

src/main/res/drawable/ic_account_black_24dp.xml

@@ -0,0 +1,6 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10s10,-4.48 10,-10S17.52,2 12,2zM7.35,18.5C8.66,17.56 10.26,17 12,17s3.34,0.56 4.65,1.5C15.34,19.44 13.74,20 12,20S8.66,19.44 7.35,18.5zM18.14,17.12L18.14,17.12C16.45,15.8 14.32,15 12,15s-4.45,0.8 -6.14,2.12l0,0C4.7,15.73 4,13.95 4,12c0,-4.42 3.58,-8 8,-8s8,3.58 8,8C20,13.95 19.3,15.73 18.14,17.12z"/>
+    <path android:fillColor="@android:color/white" android:pathData="M12,6c-1.93,0 -3.5,1.57 -3.5,3.5S10.07,13 12,13s3.5,-1.57 3.5,-3.5S13.93,6 12,6zM12,11c-0.83,0 -1.5,-0.67 -1.5,-1.5S11.17,8 12,8s1.5,0.67 1.5,1.5S12.83,11 12,11z"/>
+</vector>

src/main/res/drawable/ic_account_white_24dp.xml

@@ -0,0 +1,6 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M12,2C6.48,2 2,6.48 2,12s4.48,10 10,10s10,-4.48 10,-10S17.52,2 12,2zM7.35,18.5C8.66,17.56 10.26,17 12,17s3.34,0.56 4.65,1.5C15.34,19.44 13.74,20 12,20S8.66,19.44 7.35,18.5zM18.14,17.12L18.14,17.12C16.45,15.8 14.32,15 12,15s-4.45,0.8 -6.14,2.12l0,0C4.7,15.73 4,13.95 4,12c0,-4.42 3.58,-8 8,-8s8,3.58 8,8C20,13.95 19.3,15.73 18.14,17.12z"/>
+    <path android:fillColor="@android:color/white" android:pathData="M12,6c-1.93,0 -3.5,1.57 -3.5,3.5S10.07,13 12,13s3.5,-1.57 3.5,-3.5S13.93,6 12,6zM12,11c-0.83,0 -1.5,-0.67 -1.5,-1.5S11.17,8 12,8s1.5,0.67 1.5,1.5S12.83,11 12,11z"/>
+</vector>

src/main/res/drawable/ic_group_selected_black_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M16,11c1.66,0 2.99,-1.34 2.99,-3S17.66,5 16,5c-1.66,0 -3,1.34 -3,3s1.34,3 3,3zM8,11c1.66,0 2.99,-1.34 2.99,-3S9.66,5 8,5C6.34,5 5,6.34 5,8s1.34,3 3,3zM8,13c-2.33,0 -7,1.17 -7,3.5L1,19h14v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5zM16,13c-0.29,0 -0.62,0.02 -0.97,0.05 1.16,0.84 1.97,1.97 1.97,3.45L17,19h6v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5z"/>
+</vector>

src/main/res/drawable/ic_group_selected_white_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M16,11c1.66,0 2.99,-1.34 2.99,-3S17.66,5 16,5c-1.66,0 -3,1.34 -3,3s1.34,3 3,3zM8,11c1.66,0 2.99,-1.34 2.99,-3S9.66,5 8,5C6.34,5 5,6.34 5,8s1.34,3 3,3zM8,13c-2.33,0 -7,1.17 -7,3.5L1,19h14v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5zM16,13c-0.29,0 -0.62,0.02 -0.97,0.05 1.16,0.84 1.97,1.97 1.97,3.45L17,19h6v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5z"/>
+</vector>

src/main/res/drawable/outline_chat_black_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#000000" android:viewportHeight="960"
+    android:viewportWidth="960" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M240,560L560,560L560,480L240,480L240,560ZM240,440L720,440L720,360L240,360L240,440ZM240,320L720,320L720,240L240,240L240,320ZM80,880L80,160Q80,127 103.5,103.5Q127,80 160,80L800,80Q833,80 856.5,103.5Q880,127 880,160L880,640Q880,673 856.5,696.5Q833,720 800,720L240,720L80,880ZM206,640L800,640Q800,640 800,640Q800,640 800,640L800,160Q800,160 800,160Q800,160 800,160L160,160Q160,160 160,160Q160,160 160,160L160,685L206,640ZM160,640L160,640L160,160Q160,160 160,160Q160,160 160,160L160,160Q160,160 160,160Q160,160 160,160L160,640Q160,640 160,640Q160,640 160,640L160,640Z"/>
+</vector>

src/main/res/drawable/outline_chat_white_24.xml

@@ -0,0 +1,5 @@
+<vector android:autoMirrored="true" android:height="24dp"
+    android:tint="#FFFFFF" android:viewportHeight="24"
+    android:viewportWidth="24" android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M4,4h16v12L5.17,16L4,17.17L4,4m0,-2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2L4,2zM6,12h8v2L6,14v-2zM6,9h12v2L6,11L6,9zM6,6h12v2L6,8L6,6z"/>
+</vector>

src/main/res/drawable/outline_group_black_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M9,13.75c-2.34,0 -7,1.17 -7,3.5L2,19h14v-1.75c0,-2.33 -4.66,-3.5 -7,-3.5zM4.34,17c0.84,-0.58 2.87,-1.25 4.66,-1.25s3.82,0.67 4.66,1.25L4.34,17zM9,12c1.93,0 3.5,-1.57 3.5,-3.5S10.93,5 9,5 5.5,6.57 5.5,8.5 7.07,12 9,12zM9,7c0.83,0 1.5,0.67 1.5,1.5S9.83,10 9,10s-1.5,-0.67 -1.5,-1.5S8.17,7 9,7zM16.04,13.81c1.16,0.84 1.96,1.96 1.96,3.44L18,19h4v-1.75c0,-2.02 -3.5,-3.17 -5.96,-3.44zM15,12c1.93,0 3.5,-1.57 3.5,-3.5S16.93,5 15,5c-0.54,0 -1.04,0.13 -1.5,0.35 0.63,0.89 1,1.98 1,3.15s-0.37,2.26 -1,3.15c0.46,0.22 0.96,0.35 1.5,0.35z"/>
+</vector>

src/main/res/drawable/outline_group_white_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M9,13.75c-2.34,0 -7,1.17 -7,3.5L2,19h14v-1.75c0,-2.33 -4.66,-3.5 -7,-3.5zM4.34,17c0.84,-0.58 2.87,-1.25 4.66,-1.25s3.82,0.67 4.66,1.25L4.34,17zM9,12c1.93,0 3.5,-1.57 3.5,-3.5S10.93,5 9,5 5.5,6.57 5.5,8.5 7.07,12 9,12zM9,7c0.83,0 1.5,0.67 1.5,1.5S9.83,10 9,10s-1.5,-0.67 -1.5,-1.5S8.17,7 9,7zM16.04,13.81c1.16,0.84 1.96,1.96 1.96,3.44L18,19h4v-1.75c0,-2.02 -3.5,-3.17 -5.96,-3.44zM15,12c1.93,0 3.5,-1.57 3.5,-3.5S16.93,5 15,5c-0.54,0 -1.04,0.13 -1.5,0.35 0.63,0.89 1,1.98 1,3.15s-0.37,2.26 -1,3.15c0.46,0.22 0.96,0.35 1.5,0.35z"/>
+</vector>

src/main/res/layout-w945dp/activity_conversations.xml

@@ -1,14 +1,21 @@
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
 
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            android:layout_above="@id/bottom_navigation"
             android:orientation="vertical">
 
-        <include android:id="@+id/toolbar"
+            <include
+                android:id="@+id/toolbar"
                 layout="@layout/toolbar" />
 
             <LinearLayout
+                android:id="@+id/main_layout"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent">
 
@@ -22,7 +29,21 @@
                     android:id="@+id/secondary_fragment"
                     android:layout_width="0dp"
                     android:layout_height="match_parent"
-                android:layout_weight="1618"/>
+                    android:layout_weight="1618"
+                    android:layout_marginBottom="70dp" />
+
             </LinearLayout>
         </LinearLayout>
+
+        <com.google.android.material.bottomnavigation.BottomNavigationView
+            android:id="@+id/bottom_navigation"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/nav_bar_height"
+            android:layout_alignParentBottom="true"
+            android:background="?attr/color_background_secondary"
+            app:labelVisibilityMode="labeled"
+            app:menu="@menu/bottom_navigation_menu_chat"
+            android:visibility="gone" />
+
+    </RelativeLayout>
 </layout>

src/main/res/layout/activity_conversations.xml

@@ -27,11 +27,17 @@
   ~ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   ~ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   -->
-<layout xmlns:android="http://schemas.android.com/apk/res/android">
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
 
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            android:layout_above="@id/bottom_navigation"
             android:orientation="vertical">
 
             <include android:id="@+id/toolbar"
@@ -42,4 +48,16 @@
                 android:layout_width="match_parent"
                 android:layout_height="match_parent" />
         </LinearLayout>
+
+        <com.google.android.material.bottomnavigation.BottomNavigationView
+            android:id="@+id/bottom_navigation"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/nav_bar_height"
+            android:layout_alignParentBottom="true"
+            android:background="?attr/color_background_secondary"
+            app:labelVisibilityMode="labeled"
+            app:menu="@menu/bottom_navigation_menu_chat"
+            android:state_checked="true"
+            android:visibility="gone" />
+    </RelativeLayout>
 </layout>

src/main/res/layout/activity_manage_accounts.xml

@@ -1,8 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:background="?attr/color_background_primary"
+        android:layout_above="@id/bottom_navigation"
         android:orientation="vertical">
 
         <include layout="@layout/toolbar" />
@@ -16,3 +24,13 @@
         </ListView>
 
     </LinearLayout>
+
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/bottom_navigation"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/nav_bar_height"
+        android:layout_alignParentBottom="true"
+        android:background="?attr/color_background_secondary"
+        app:labelVisibilityMode="labeled"
+        app:menu="@menu/bottom_navigation_menu_accounts" />
+</RelativeLayout>

src/main/res/layout/activity_start_conversation.xml

@@ -5,6 +5,10 @@
     <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent">
+        <RelativeLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_above="@id/bottom_navigation">
 
             <include
                 android:id="@+id/toolbar"
@@ -56,4 +60,14 @@
                 app:sdOverlayLayout="@id/overlay"
                 app:sdUseReverseAnimationOnClose="true" />
         </RelativeLayout>
+
+        <com.google.android.material.bottomnavigation.BottomNavigationView
+            android:id="@+id/bottom_navigation"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/nav_bar_height"
+            android:layout_alignParentBottom="true"
+            android:background="?attr/color_background_secondary"
+            app:labelVisibilityMode="labeled"
+            app:menu="@menu/bottom_navigation_menu_contacts" />
+    </RelativeLayout>
 </layout>

src/main/res/menu/bottom_navigation_menu_accounts.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/chats"
+        android:icon="?attr/ic_chat_unselected"
+        android:title="@string/chats"/>
+    <item
+        android:id="@+id/contactslist"
+        android:icon="?attr/ic_group_unselected"
+        android:title="@string/contacts"/>
+    <item
+        android:id="@+id/manageaccounts"
+        android:icon="?attr/ic_accounts_selected"
+        android:title="@string/accounts"/>
+</menu>

src/main/res/menu/bottom_navigation_menu_chat.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/chats"
+        android:icon="?attr/ic_chat_selected"
+        android:title="@string/chats"/>
+    <item
+        android:id="@+id/contactslist"
+        android:icon="?attr/ic_group_unselected"
+        android:title="@string/contacts"/>
+    <item
+        android:id="@+id/manageaccounts"
+        android:icon="?attr/ic_account"
+        android:title="@string/accounts"/>
+</menu>

src/main/res/menu/bottom_navigation_menu_contacts.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/chats"
+        android:icon="?attr/ic_chat_unselected"
+        android:title="@string/chats"/>
+    <item
+        android:id="@+id/contactslist"
+        android:icon="?attr/ic_group_selected"
+        android:title="@string/contacts"/>
+    <item
+        android:id="@+id/manageaccounts"
+        android:icon="?attr/ic_account"
+        android:title="@string/accounts"/>
+</menu>

src/main/res/values/attrs.xml

@@ -124,6 +124,13 @@
     <attr name="icon_notifications_none" format="reference" />
     <attr name="icon_pinned_on_top" format="reference" />
 
+    <attr name="ic_chat_unselected" format="reference" />
+    <attr name="ic_chat_selected" format="reference" />
+    <attr name="ic_account" format="reference" />
+    <attr name="ic_accounts_selected" format="reference" />
+    <attr name="ic_group_unselected" format="reference" />
+    <attr name="ic_group_selected" format="reference" />
+
     <attr name="dialog_horizontal_padding" format="dimension" />
     <attr name="dialog_vertical_padding" format="dimension" />
 

src/main/res/values/defaults.xml

@@ -20,6 +20,7 @@
     <integer name="auto_accept_filesize">524288</integer>
     <string name="picture_compression">auto</string>
     <bool name="use_green_background">true</bool>
+    <bool name="show_nav_bar">false</bool>
     <string name="quick_action">recent</string>
     <bool name="show_dynamic_tags">false</bool>
     <bool name="group_by_tags">false</bool>

src/main/res/values/dimens.xml

@@ -56,6 +56,7 @@
     <dimen name="bottom_filters_height_with_margin">98dp</dimen>
     <dimen name="bottom_editor_actions_shadow_height">180dp</dimen>
     <dimen name="full_brush_size">40dp</dimen>
+    <dimen name="nav_bar_height">56dp</dimen>
 
     <dimen name="one_dp">1dp</dimen>
     <dimen name="tiny_margin">2dp</dimen>

src/main/res/values/strings.xml

@@ -597,6 +597,8 @@
     <string name="pref_theme_automatic">Automatic</string>
     <string name="pref_theme_light">Light</string>
     <string name="pref_theme_dark">Dark</string>
+    <string name="pref_show_navigation_bar">Show navigation bar</string>
+    <string name="pref_show_navigation_bar_summary">Use alternative navigation way via navigation bar on the bottom of the screen</string>
     <string name="pref_use_green_background">Green Background</string>
     <string name="pref_use_green_background_summary">Use green background for received messages</string>
     <string name="pref_always_show_full_timestamps">Show full timestamps</string>
@@ -1086,4 +1088,6 @@
     <string name="contact_tag_with_total">%1$s (%2$d)</string>
     <string name="refresh_feature_discovery">Refresh Feature Discovery</string>
     <string name="retract_message_alert_title">Do you really want to retract this message?</string>
+    <string name="chats">Chats</string>
+    <string name="accounts">Accounts</string>
 </resources>

src/main/res/values/themes.xml

@@ -143,6 +143,13 @@
         <item name="icon_copy_bar" type="reference">@drawable/ic_content_copy_white_24dp</item>
         <item name="icon_copy_bar_small" type="reference">@drawable/content_copy_12dp</item>
 
+        <item name="ic_chat_unselected" type="reference">@drawable/outline_chat_black_24</item>
+        <item name="ic_chat_selected" type="reference">@drawable/chat_selected_black_24</item>
+        <item name="ic_account" type="reference">@drawable/ic_account_black_24dp</item>
+        <item name="ic_accounts_selected" type="reference">@drawable/accounts_selected_black_24</item>
+        <item name="ic_group_unselected" type="reference">@drawable/outline_group_black_24dp</item>
+        <item name="ic_group_selected" type="reference">@drawable/ic_group_selected_black_24</item>
+
         <item name="icon_notifications" type="reference">@drawable/ic_notifications_black_24dp
         </item>
         <item name="icon_notifications_off" type="reference">
@@ -310,6 +317,13 @@
         <item name="icon_copy_bar" type="reference">@drawable/ic_content_copy_white_24dp</item>
         <item name="icon_copy_bar_small" type="reference">@drawable/content_copy_12dp_white</item>
 
+        <item name="ic_chat_unselected" type="reference">@drawable/outline_chat_white_24</item>
+        <item name="ic_chat_selected" type="reference">@drawable/chat_selected_white_24</item>
+        <item name="ic_account" type="reference">@drawable/ic_account_white_24dp</item>
+        <item name="ic_accounts_selected" type="reference">@drawable/accounts_selected_white_24</item>
+        <item name="ic_group_unselected" type="reference">@drawable/outline_group_white_24</item>
+        <item name="ic_group_selected" type="reference">@drawable/ic_group_selected_white_24</item>
+
         <item name="icon_notifications" type="reference">@drawable/ic_notifications_white_24dp
         </item>
         <item name="icon_notifications_off" type="reference">

src/main/res/xml/preferences.xml

@@ -178,6 +178,11 @@
             android:title="@string/pref_accept_all_files_if_wifi" />
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/pref_ui_options">
+        <CheckBoxPreference
+            android:defaultValue="@bool/show_nav_bar"
+            android:key="show_nav_bar"
+            android:summary="@string/pref_show_navigation_bar_summary"
+            android:title="@string/pref_show_navigation_bar" />
         <CheckBoxPreference
             android:defaultValue="@bool/use_green_background"
             android:key="use_green_background"