Remove Start chat fragment, replaced with EditTextDialog (Floating Action Button)

app/src/main/java/io/github/chronosx88/influence/contracts/CoreContracts.kt

@@ -46,11 +46,13 @@ interface CoreContracts {
 
     interface IMainLogicContract {
         fun initPeer()
+        fun sendStartChatMessage(username: String)
         fun shutdownPeer()
     }
 
     interface IMainPresenterContract {
         fun initPeer()
+        fun startChatWithPeer(username: String)
         fun onDestroy()
     }
 

app/src/main/java/io/github/chronosx88/influence/logic/MainLogic.java

@@ -22,11 +22,14 @@ import net.tomp2p.nat.PeerBuilderNAT;
 import net.tomp2p.nat.PeerNAT;
 import net.tomp2p.p2p.PeerBuilder;
 import net.tomp2p.peers.Number160;
+import net.tomp2p.peers.Number640;
 import net.tomp2p.peers.PeerAddress;
 import net.tomp2p.relay.tcp.TCPRelayClientConfig;
 import net.tomp2p.replication.IndirectReplication;
 import net.tomp2p.storage.Data;
 
+import org.jetbrains.annotations.NotNull;
+
 import java.io.File;
 import java.io.IOException;
 import java.net.Inet4Address;
@@ -34,6 +37,8 @@ import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.UnknownHostException;
 import java.security.KeyPair;
+import java.util.ArrayList;
+import java.util.Map;
 import java.util.Timer;
 import java.util.TimerTask;
 import java.util.UUID;
@@ -42,10 +47,14 @@ import io.github.chronosx88.influence.contracts.CoreContracts;
 import io.github.chronosx88.influence.helpers.AppHelper;
 import io.github.chronosx88.influence.helpers.JVMShutdownHook;
 import io.github.chronosx88.influence.helpers.KeyPairManager;
+import io.github.chronosx88.influence.helpers.LocalDBWrapper;
 import io.github.chronosx88.influence.helpers.NetworkHandler;
+import io.github.chronosx88.influence.helpers.ObservableUtils;
 import io.github.chronosx88.influence.helpers.P2PUtils;
 import io.github.chronosx88.influence.helpers.StorageBerkeleyDB;
 import io.github.chronosx88.influence.helpers.actions.UIActions;
+import io.github.chronosx88.influence.models.ChatMetadata;
+import io.github.chronosx88.influence.models.NewChatRequestMessage;
 import io.github.chronosx88.influence.models.PublicUserProfile;
 
 public class MainLogic implements CoreContracts.IMainLogicContract {
@@ -236,8 +245,10 @@ public class MainLogic implements CoreContracts.IMainLogicContract {
             if(replication != null) {
                 replication.shutdown();
             }
+            if(peerDHT != null) {
                 peerDHT.peer().announceShutdown().start().awaitUninterruptibly();
                 peerDHT.peer().shutdown().awaitUninterruptibly();
+            }
             storage.close();
             System.exit(0);
         }).start();
@@ -292,4 +303,74 @@ public class MainLogic implements CoreContracts.IMainLogicContract {
         channelServerConfiguration.byteBufPool(false);
         return channelServerConfiguration;
     }
+
+    @Override
+    public void sendStartChatMessage(@NotNull String username) {
+        if(AppHelper.getPeerDHT() == null) {
+            ObservableUtils.notifyUI(UIActions.NODE_IS_OFFLINE);
+            return;
+        }
+
+        String companionPeerID = getPeerIDByUsername(username);
+        if(companionPeerID == null) {
+            ObservableUtils.notifyUI(UIActions.PEER_NOT_EXIST);
+            return;
+        }
+        PublicUserProfile recipientPublicProfile = getPublicProfile(companionPeerID);
+        if(recipientPublicProfile == null) {
+            ObservableUtils.notifyUI(UIActions.PEER_NOT_EXIST);
+            return;
+        }
+
+        NewChatRequestMessage newChatRequestMessage = new NewChatRequestMessage(UUID.randomUUID().toString(), UUID.randomUUID().toString(), AppHelper.getPeerID(), AppHelper.getUsername(), System.currentTimeMillis(), 0);
+        try {
+            if(P2PUtils.put(companionPeerID + "_pendingChats", newChatRequestMessage.getChatID(), new Data(gson.toJson(newChatRequestMessage)))) {
+                Log.i(LOG_TAG, "# Create new offline chat request is successful! ChatID: " + newChatRequestMessage.getChatID());
+            } else {
+                Log.e(LOG_TAG, "# Failed to create offline chat request. ChatID: " + newChatRequestMessage.getChatID());
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        ArrayList<String> admins = new ArrayList<>();
+        admins.add(AppHelper.getPeerID());
+        Data data = null;
+        try {
+            data = new Data(gson.toJson(new ChatMetadata(username, admins, new ArrayList<>())));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        data.protectEntry(keyPairManager.openMainKeyPair());
+        P2PUtils.put(newChatRequestMessage.getChatID() + "_metadata", null, data);
+        LocalDBWrapper.createChatEntry(newChatRequestMessage.getChatID(), username, newChatRequestMessage.getChatID() + "_metadata", newChatRequestMessage.getChatID() + "_members", 0);
+        ObservableUtils.notifyUI(UIActions.NEW_CHAT);
+    }
+
+    private PublicUserProfile getPublicProfile(String peerID) {
+        PublicUserProfile publicProfile = null;
+        Map<Number640, Data> data = P2PUtils.get(peerID + "_profile");
+        if (data != null && data.size() == 1) {
+            try {
+                publicProfile = gson.fromJson((String) data.values().iterator().next().object(), PublicUserProfile.class);
+            } catch (ClassNotFoundException | IOException e) {
+                e.printStackTrace();
+            }
+            return publicProfile;
+        }
+        return null;
+    }
+
+    private String getPeerIDByUsername(String username) {
+        Map<Number640, Data> usernameMap = P2PUtils.get(username);
+        if(usernameMap == null) {
+            return null;
+        }
+        try {
+            return (String) usernameMap.values().iterator().next().object();
+        } catch (ClassNotFoundException | IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
 }

app/src/main/java/io/github/chronosx88/influence/logic/StartChatLogic.java

@@ -1,110 +0,0 @@
-package io.github.chronosx88.influence.logic;
-
-import android.util.Log;
-
-import com.google.gson.Gson;
-
-import net.tomp2p.dht.PeerDHT;
-import net.tomp2p.peers.Number640;
-import net.tomp2p.storage.Data;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Map;
-import java.util.UUID;
-
-import io.github.chronosx88.influence.contracts.CoreContracts;
-import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.KeyPairManager;
-import io.github.chronosx88.influence.helpers.LocalDBWrapper;
-import io.github.chronosx88.influence.helpers.ObservableUtils;
-import io.github.chronosx88.influence.helpers.P2PUtils;
-import io.github.chronosx88.influence.helpers.actions.UIActions;
-import io.github.chronosx88.influence.models.ChatMetadata;
-import io.github.chronosx88.influence.models.NewChatRequestMessage;
-import io.github.chronosx88.influence.models.PublicUserProfile;
-
-public class StartChatLogic implements CoreContracts.IStartChatLogicContract {
-    private PeerDHT peerDHT;
-    private Gson gson;
-    private KeyPairManager keyPairManager;
-    private final static String LOG_TAG = "StartChatLogic";
-
-    public StartChatLogic() {
-        peerDHT = AppHelper.getPeerDHT();
-        gson = new Gson();
-        keyPairManager = new KeyPairManager();
-    }
-
-    @Override
-    public void sendStartChatMessage(String username) {
-        if(peerDHT == null) {
-            ObservableUtils.notifyUI(UIActions.NODE_IS_OFFLINE);
-            return;
-        }
-
-        new Thread(() -> {
-            String peerID = getPeerIDByUsername(username);
-            if(peerID == null) {
-                ObservableUtils.notifyUI(UIActions.PEER_NOT_EXIST);
-                return;
-            }
-            PublicUserProfile recipientPublicProfile = getPublicProfile(peerID);
-            if(recipientPublicProfile == null) {
-                ObservableUtils.notifyUI(UIActions.PEER_NOT_EXIST);
-                return;
-            }
-
-            NewChatRequestMessage newChatRequestMessage = new NewChatRequestMessage(UUID.randomUUID().toString(), UUID.randomUUID().toString(), AppHelper.getPeerID(), AppHelper.getUsername(), System.currentTimeMillis(), 0);
-            try {
-                if(P2PUtils.put(peerID + "_pendingChats", newChatRequestMessage.getChatID(), new Data(gson.toJson(newChatRequestMessage)))) {
-                    Log.i(LOG_TAG, "# Create new offline chat request is successful! ChatID: " + newChatRequestMessage.getChatID());
-                } else {
-                    Log.e(LOG_TAG, "# Failed to create offline chat request. ChatID: " + newChatRequestMessage.getChatID());
-                }
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-
-            ArrayList<String> admins = new ArrayList<>();
-            admins.add(AppHelper.getPeerID());
-            Data data = null;
-            try {
-                data = new Data(gson.toJson(new ChatMetadata(username, admins, new ArrayList<>())));
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-            data.protectEntry(keyPairManager.openMainKeyPair());
-            P2PUtils.put(newChatRequestMessage.getChatID() + "_metadata", null, data);
-            LocalDBWrapper.createChatEntry(newChatRequestMessage.getChatID(), username, newChatRequestMessage.getChatID() + "_metadata", newChatRequestMessage.getChatID() + "_members", 0);
-            ObservableUtils.notifyUI(UIActions.NEW_CHAT);
-        }).start();
-    }
-
-    private PublicUserProfile getPublicProfile(String peerID) {
-        PublicUserProfile publicProfile = null;
-        Map<Number640, Data> data = P2PUtils.get(peerID + "_profile");
-        if (data != null && data.size() == 1) {
-            try {
-                publicProfile = gson.fromJson((String) data.values().iterator().next().object(), PublicUserProfile.class);
-            } catch (ClassNotFoundException | IOException e) {
-                e.printStackTrace();
-            }
-            return publicProfile;
-        }
-        return null;
-    }
-
-    private String getPeerIDByUsername(String username) {
-        Map<Number640, Data> usernameMap = P2PUtils.get(username);
-        if(usernameMap == null) {
-            return null;
-        }
-        try {
-            return (String) usernameMap.values().iterator().next().object();
-        } catch (ClassNotFoundException | IOException e) {
-            e.printStackTrace();
-        }
-        return null;
-    }
-}

app/src/main/java/io/github/chronosx88/influence/presenters/MainPresenter.kt

@@ -1,13 +1,21 @@
 package io.github.chronosx88.influence.presenters
 
+import com.google.gson.JsonObject
 import io.github.chronosx88.influence.R
 import io.github.chronosx88.influence.contracts.CoreContracts
+import io.github.chronosx88.influence.contracts.observer.IObserver
 import io.github.chronosx88.influence.helpers.AppHelper
+import io.github.chronosx88.influence.helpers.actions.UIActions
 import io.github.chronosx88.influence.logic.MainLogic
+import org.jetbrains.anko.doAsync
 
-class MainPresenter(private val view: CoreContracts.IMainViewContract) : CoreContracts.IMainPresenterContract {
+class MainPresenter(private val view: CoreContracts.IMainViewContract) : CoreContracts.IMainPresenterContract, IObserver {
     private val logic: CoreContracts.IMainLogicContract = MainLogic()
 
+    init {
+        AppHelper.getObservable().register(this)
+    }
+
     override fun initPeer() {
         if (AppHelper.getPeerDHT() == null) {
             logic.initPeer()
@@ -17,6 +25,31 @@ class MainPresenter(private val view: CoreContracts.IMainViewContract) : CoreCon
         }
     }
 
+    override fun startChatWithPeer(username: String) {
+        doAsync {
+            logic.sendStartChatMessage(username)
+        }
+    }
+
+    override fun handleEvent(obj: JsonObject) {
+        when(obj.get("action").asInt) {
+            UIActions.PEER_NOT_EXIST -> {
+                view.showProgressBar(false)
+                view.showSnackbar("Данный узел не существует!")
+            }
+
+            UIActions.NEW_CHAT -> {
+                view.showProgressBar(false)
+                view.showSnackbar("Чат успешно создан!")
+            }
+
+            UIActions.NODE_IS_OFFLINE -> {
+                view.showProgressBar(false)
+                view.showSnackbar("Нода не запущена!")
+            }
+        }
+    }
+
     override fun onDestroy() {
         logic.shutdownPeer()
     }

app/src/main/java/io/github/chronosx88/influence/presenters/StartChatPresenter.java

@@ -1,49 +0,0 @@
-package io.github.chronosx88.influence.presenters;
-
-import com.google.gson.JsonObject;
-
-import io.github.chronosx88.influence.contracts.CoreContracts;
-import io.github.chronosx88.influence.contracts.observer.IObserver;
-import io.github.chronosx88.influence.helpers.AppHelper;
-import io.github.chronosx88.influence.helpers.actions.UIActions;
-import io.github.chronosx88.influence.logic.StartChatLogic;
-
-public class StartChatPresenter implements CoreContracts.IStartChatPresenterContract, IObserver {
-    private CoreContracts.IStartChatViewContract view;
-    private CoreContracts.IStartChatLogicContract logic;
-
-    public StartChatPresenter(CoreContracts.IStartChatViewContract view) {
-        this.view = view;
-        this.logic = new StartChatLogic();
-        AppHelper.getObservable().register(this);
-    }
-
-    @Override
-    public void startChatWithPeer(String peerID) {
-        view.showProgressDialog(true);
-        logic.sendStartChatMessage(peerID);
-    }
-
-    @Override
-    public void handleEvent(JsonObject object) {
-        switch (object.get("action").getAsInt()) {
-            case UIActions.PEER_NOT_EXIST: {
-                view.showProgressDialog(false);
-                view.showMessage("Данный узел не существует!");
-                break;
-            }
-
-            case UIActions.NEW_CHAT: {
-                view.showProgressDialog(false);
-                view.showMessage("Чат успешно создан!");
-                break;
-            }
-
-            case UIActions.NODE_IS_OFFLINE: {
-                view.showProgressDialog(false);
-                view.showMessage("Нода не запущена!");
-                break;
-            }
-        }
-    }
-}

app/src/main/java/io/github/chronosx88/influence/views/MainActivity.java

@@ -6,13 +6,16 @@ import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.EditText;
 import android.widget.Toast;
 
 import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.gson.JsonObject;
 
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentTransaction;
@@ -27,7 +30,7 @@ import io.github.chronosx88.influence.helpers.actions.UIActions;
 import io.github.chronosx88.influence.presenters.MainPresenter;
 import io.github.chronosx88.influence.views.fragments.ChatListFragment;
 import io.github.chronosx88.influence.views.fragments.SettingsFragment;
-import io.github.chronosx88.influence.views.fragments.StartChatFragment;
+import kotlin.Pair;
 
 public class MainActivity extends AppCompatActivity implements IObserver, CoreContracts.IMainViewContract {
 
@@ -48,9 +51,6 @@ public class MainActivity extends AppCompatActivity implements IObserver, CoreCo
                 case R.id.action_settings:
                     selectedFragment = new SettingsFragment();
                     break;
-                case R.id.action_start_chat:
-                    selectedFragment = new StartChatFragment();
-                    break;
             }
 
             FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
@@ -69,6 +69,19 @@ public class MainActivity extends AppCompatActivity implements IObserver, CoreCo
         BottomNavigationView navigation = findViewById(R.id.main_bottom_navigation);
         navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
 
+        FloatingActionButton fab = findViewById(R.id.add_chat);
+        fab.setOnClickListener((v) -> {
+            Pair<AlertDialog.Builder, EditText> pair = ViewUtils.INSTANCE.setupEditTextDialog(MainActivity.this, getString(R.string.input_companion_username));
+            pair.getFirst().setPositiveButton(getString(R.string.ok), (dialog, which) -> {
+                progressDialog.show();
+                presenter.startChatWithPeer(pair.getSecond().getText().toString());
+            });
+            pair.getFirst().setNegativeButton(getString(R.string.cancel), (dialog, which) -> {
+                dialog.cancel();
+            });
+            pair.getFirst().show();
+        });
+
         getSupportFragmentManager()
                 .beginTransaction()
                 .replace(R.id.main_fragment_container, new ChatListFragment())
@@ -155,17 +168,21 @@ public class MainActivity extends AppCompatActivity implements IObserver, CoreCo
 
     @Override
     public void showSnackbar(@NotNull String message) {
+        runOnUiThread(() -> {
             Snackbar.make(getRootView(), message, Snackbar.LENGTH_LONG)
                     .show();
+        });
     }
 
     @Override
     public void showProgressBar(boolean state) {
+        runOnUiThread(() -> {
             if(state) {
                 progressDialog.show();
             } else {
                 progressDialog.dismiss();
             }
+        });
     }
 
     private View getRootView() {

app/src/main/java/io/github/chronosx88/influence/views/ViewUtils.kt

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2019 ChronosX88
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.github.chronosx88.influence.views
+
+import android.content.Context
+import android.widget.EditText
+import android.widget.LinearLayout
+import androidx.appcompat.app.AlertDialog
+import io.github.chronosx88.influence.R
+
+object ViewUtils {
+    fun setupEditTextDialog(context: Context, message: String): Pair<AlertDialog.Builder, EditText> {
+        val alertDialog = AlertDialog.Builder(context)
+        alertDialog.setTitle(message)
+
+        val input = EditText(context)
+        val lp = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.MATCH_PARENT)
+        input.setSingleLine()
+        input.layoutParams = lp
+
+        alertDialog.setView(input)
+
+        return Pair(alertDialog, input)
+    }
+}

app/src/main/java/io/github/chronosx88/influence/views/fragments/StartChatFragment.java

@@ -1,69 +0,0 @@
-package io.github.chronosx88.influence.views.fragments;
-
-import android.app.ProgressDialog;
-import android.os.Bundle;
-import android.os.Handler;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
-
-import com.google.android.material.snackbar.Snackbar;
-import com.google.android.material.textfield.TextInputLayout;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.coordinatorlayout.widget.CoordinatorLayout;
-import androidx.fragment.app.Fragment;
-import io.github.chronosx88.influence.R;
-import io.github.chronosx88.influence.contracts.CoreContracts;
-import io.github.chronosx88.influence.presenters.StartChatPresenter;
-
-public class StartChatFragment extends Fragment implements CoreContracts.IStartChatViewContract {
-    private TextInputLayout textInputPeerID;
-    private ProgressDialog progressDialog;
-    private Button createChatButton;
-    private StartChatPresenter presenter;
-    private Handler mainThreadHandler;
-    private CoordinatorLayout coordinatorLayout;
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                             Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.start_chat_fragment, container, false);
-    }
-
-    @Override
-    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
-        super.onViewCreated(view, savedInstanceState);
-        presenter = new StartChatPresenter(this);
-        textInputPeerID = view.findViewById(R.id.textInputPeerID);
-        progressDialog = new ProgressDialog(getActivity(), R.style.AlertDialogTheme);
-        progressDialog.setCancelable(false);
-        progressDialog.setProgressStyle(android.R.style.Widget_ProgressBar_Small);
-        createChatButton = view.findViewById(R.id.create_chat_button);
-        createChatButton.setOnClickListener((v) -> {
-            presenter.startChatWithPeer(textInputPeerID.getEditText().getText().toString());
-        });
-        mainThreadHandler = new Handler(getContext().getMainLooper());
-        coordinatorLayout = getView().findViewById(R.id.start_chat_coordinator);
-    }
-
-    @Override
-    public void showMessage(String message) {
-        mainThreadHandler.post(() -> {
-            Snackbar.make(coordinatorLayout, message, Snackbar.LENGTH_SHORT).show();
-        });
-    }
-
-    @Override
-    public void showProgressDialog(boolean enabled) {
-        mainThreadHandler.post(() -> {
-            if(enabled) {
-                progressDialog.show();
-            } else {
-                progressDialog.dismiss();
-            }
-        });
-    }
-}

app/src/main/res/drawable/ic_add_white_24dp.xml

@@ -0,0 +1,22 @@
+<!--
+  ~ Copyright (C) 2019 ChronosX88
+  ~
+  ~ This program is free software: you can redistribute it and/or modify
+  ~ it under the terms of the GNU General Public License as published by
+  ~ the Free Software Foundation, either version 3 of the License, or
+  ~ (at your option) any later version.
+  ~
+  ~ This program is distributed in the hope that it will be useful,
+  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
+  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  ~ GNU General Public License for more details.
+  ~
+  ~ You should have received a copy of the GNU General Public License
+  ~ along with this program. If not, see <https://www.gnu.org/licenses/>.
+  -->
+
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>

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

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
@@ -7,12 +7,15 @@
     tools:context=".views.MainActivity"
     android:orientation="vertical">
 
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
         <FrameLayout
             android:id="@+id/main_fragment_container"
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="10"/>
-
         <com.google.android.material.bottomnavigation.BottomNavigationView
             android:id="@+id/main_bottom_navigation"
             android:layout_width="match_parent"
@@ -22,3 +25,15 @@
             android:layout_weight="1"
             android:layout_gravity="bottom"/>
     </LinearLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/add_chat"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_marginBottom="68dp"
+        android:layout_marginEnd="16dp"
+        android:src="@drawable/ic_add_white_24dp"/>
+
+
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,33 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-
-<androidx.coordinatorlayout.widget.CoordinatorLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/start_chat_coordinator"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent">
-    <LinearLayout
-        android:orientation="vertical"
-        android:gravity="center"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent">
-
-        <com.google.android.material.textfield.TextInputLayout
-            android:id="@+id/textInputPeerID"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center">
-            <com.google.android.material.textfield.TextInputEditText
-                android:layout_width="match_parent"
-                android:layout_height="wrap_content"
-                android:layout_gravity="center"
-                android:hint="@string/username_hint"/>
-        </com.google.android.material.textfield.TextInputLayout>
-
-        <Button
-            android:id="@+id/create_chat_button"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:text="Создать чат"/>
-
-    </LinearLayout>
-</androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/menu/main_bottom_nav_menu.xml

@@ -8,8 +8,4 @@
         android:id="@+id/action_settings"
         android:icon="@drawable/ic_settings_white"
         android:title="Настройки" />
-    <item
-        android:id="@+id/action_start_chat"
-        android:icon="@drawable/ic_person_add_white"
-        android:title="Начать чат" />
 </menu>

app/src/main/res/values-ru-rRU/strings.xml

@@ -9,4 +9,5 @@
     <string name="username_hint">Имя пользователя</string>
     <string name="reconnect_network">Переподключиться к сети</string>
     <string name="node_already_running">Узел уже запущен</string>
+    <string name="input_companion_username">Введите имя пользователя собеседника</string>
 </resources>

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

@@ -8,4 +8,5 @@
     <string name="username_hint">Username</string>
     <string name="reconnect_network">Reconnect to the network</string>
     <string name="node_already_running">Node already running</string>
+    <string name="input_companion_username">Input interlocutor\'s username</string>
 </resources>