Add animated splash screen (4s), show app version on settings page

app/src/main/AndroidManifest.xml

@@ -25,14 +25,20 @@
             android:label="@string/settings_title" />
 
         <activity
-            android:name=".MainActivity"
+            android:name=".SplashActivity"
             android:exported="true"
             android:screenOrientation="portrait"
-            android:configChanges="orientation|screenSize|keyboardHidden">
+            android:theme="@style/Theme.SvxRemote">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="false"
+            android:screenOrientation="portrait"
+            android:configChanges="orientation|screenSize|keyboardHidden" />
     </application>
 </manifest>

app/src/main/java/ru/ua1zbe/svxremote/SplashActivity.kt

@@ -0,0 +1,53 @@
+package ru.ua1zbe.svxremote
+
+import android.app.Activity
+import android.content.Intent
+import android.os.Bundle
+import android.view.View
+import android.view.animation.AccelerateDecelerateInterpolator
+
+/** Красивая заставка с плавным появлением логотипа. */
+class SplashActivity : Activity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_splash)
+
+        val title = findViewById<View>(R.id.splash_title)
+        val subtitle = findViewById<View>(R.id.splash_subtitle)
+        val line = findViewById<View>(R.id.splash_line)
+
+        val baseAlpha = title.alpha
+        title.alpha = 0f
+        subtitle.alpha = 0f
+        line.alpha = 0f
+
+        title.animate()
+            .alpha(1f)
+            .scaleX(1.0f)
+            .scaleY(1.0f)
+            .setStartDelay(150)
+            .setDuration(700)
+            .setInterpolator(AccelerateDecelerateInterpolator())
+            .start()
+
+        subtitle.animate()
+            .alpha(1f)
+            .setStartDelay(600)
+            .setDuration(600)
+            .start()
+
+        line.animate()
+            .alpha(1f)
+            .setStartDelay(900)
+            .setDuration(500)
+            .start()
+
+        window.decorView.postDelayed({
+            val intent = Intent(this, MainActivity::class.java)
+            startActivity(intent)
+            overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out)
+            finish()
+        }, 4000)
+    }
+}

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

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <gradient
+        android:angle="135"
+        android:startColor="#0D1117"
+        android:centerColor="#101826"
+        android:endColor="#0D1117" />
+</shape>

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

@@ -128,5 +128,15 @@
             android:background="@drawable/bg_primary_btn"
             android:textSize="16sp"
             android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/lbl_version"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="24dp"
+            android:gravity="center"
+            android:text="@string/app_version"
+            android:textColor="@color/text_secondary"
+            android:textSize="12sp" />
     </LinearLayout>
 </ScrollView>

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

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/bg_splash">
+
+    <LinearLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:orientation="vertical"
+        android:gravity="center">
+
+        <TextView
+            android:id="@+id/splash_title"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="SVXhomyak"
+            android:textColor="@color/text_primary"
+            android:textSize="34sp"
+            android:textStyle="bold"
+            android:letterSpacing="0.08"
+            android:alpha="0" />
+
+        <TextView
+            android:id="@+id/splash_subtitle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="10dp"
+            android:text="СВЯЗЬ ЧЕРЕЗ СЕРВЕР"
+            android:textColor="@color/text_secondary"
+            android:textSize="12sp"
+            android:letterSpacing="0.3"
+            android:alpha="0" />
+
+        <View
+            android:id="@+id/splash_line"
+            android:layout_width="48dp"
+            android:layout_height="2dp"
+            android:layout_marginTop="16dp"
+            android:background="@color/info"
+            android:alpha="0" />
+    </LinearLayout>
+</FrameLayout>

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

@@ -10,6 +10,7 @@
     <string name="pref_auth_key">Пароль (AUTH_KEY)</string>
     <string name="pref_tg">Группа вещания (TG)</string>
     <string name="btn_save">Сохранить</string>
+    <string name="app_version">SVXhomyak — v1.0.0</string>
     <string name="saved">Сохранено</string>
     <string name="pref_callsign_hint">например UA1ZBE</string>