Added an option to change brightness

app/src/main/AndroidManifest.xml

@@ -1,7 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.arezoonazer.androidvideoplayer">
+    xmlns:tools="http://schemas.android.com/tools"
 
+    package="com.arezoonazer.androidvideoplayer">
+    <uses-permission
+        android:name="android.permission.WRITE_SETTINGS"
+        tools:ignore="ProtectedPermissions" />
     <application
         android:name=".PlayerApplication"
         android:allowBackup="true"

app/src/main/java/com/arezoonazer/androidvideoplayer/MainActivity.kt

@@ -1,6 +1,11 @@
 package com.arezoonazer.androidvideoplayer
 
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
 import android.os.Bundle
+import android.provider.Settings
+import android.widget.SeekBar
 import android.widget.Toast
 import android.widget.Toast.LENGTH_SHORT
 import androidx.appcompat.app.AppCompatActivity
@@ -14,6 +19,8 @@ import dagger.hilt.android.AndroidEntryPoint
 @AndroidEntryPoint
 class MainActivity : AppCompatActivity() {
 
+    lateinit var skb_brightness: SeekBar
+
     private val binding: ActivityMainBinding by lazy(LazyThreadSafetyMode.NONE) {
         ActivityMainBinding.inflate(layoutInflater)
     }
@@ -22,6 +29,14 @@ class MainActivity : AppCompatActivity() {
         super.onCreate(savedInstanceState)
         setContentView(binding.root)
 
+        skb_brightness = findViewById(R.id.seekBar)
+
+        Settings.System.putInt(
+            this.contentResolver,
+            Settings.System.SCREEN_BRIGHTNESS_MODE,
+            Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL
+        )
+
         with(binding) {
             playButton.setOnClickListener { startPlayer(getPlayerParam()) }
 
@@ -31,6 +46,27 @@ class MainActivity : AppCompatActivity() {
 
             customPlayButton.setOnClickListener { onCustomPlayButtonClicked() }
         }
+
+        skb_brightness.max = 255
+        skb_brightness.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+
+            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+                if (canWriteSettings) {
+
+                    val lp = window.attributes
+                    lp.screenBrightness = progress.toFloat() / 255
+                    window.attributes = lp
+                } else {
+                    startManageWriteSettingsPermission()
+                }
+            }
+
+            override fun onStartTrackingTouch(seekBar: SeekBar) {
+            }
+
+            override fun onStopTrackingTouch(seekBar: SeekBar) {
+            }
+        })
     }
 
     private fun getPlayerParam(): PlayerParams {
@@ -88,4 +124,38 @@ class MainActivity : AppCompatActivity() {
     private fun showToast(message: String) {
         Toast.makeText(this, message, LENGTH_SHORT).show()
     }
+
+    private fun startManageWriteSettingsPermission() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            Intent(
+                Settings.ACTION_MANAGE_WRITE_SETTINGS,
+                Uri.parse("package:${this.packageName}")
+            ).let {
+                startActivityForResult(it, 5)
+            }
+        }
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        super.onActivityResult(requestCode, resultCode, data)
+
+        when (requestCode) {
+            1 -> {
+                if (this.canWriteSettings) {
+                    // change the settings here ...
+                } else {
+                    Toast.makeText(
+                        applicationContext,
+                        "Write settings permission is not granted!",
+                        Toast.LENGTH_SHORT
+                    ).show()
+                }
+            }
+        }
+    }
+
+    val canWriteSettings: Boolean
+        get() = Build.VERSION.SDK_INT < Build.VERSION_CODES.M || Settings.System.canWrite(this)
+
+
 }

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

@@ -73,4 +73,15 @@
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toBottomOf="@id/customPlayButton" />
 
+    <SeekBar
+        android:id="@+id/seekBar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_alignParentBottom="true"
+        android:layout_marginTop="624dp"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:layout_editor_absoluteX="-16dp">
+  </SeekBar>
+
+
 </androidx.constraintlayout.widget.ConstraintLayout>

player/src/main/res/layout/exo_player_view.xml

@@ -1,5 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <merge 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"
     android:layout_height="match_parent"
     android:animateLayoutChanges="false"
@@ -20,7 +22,10 @@
         <androidx.media3.ui.SubtitleView
             android:id="@id/exo_subtitles"
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="match_parent" >
+
+
+        </androidx.media3.ui.SubtitleView>
 
     </androidx.media3.ui.AspectRatioFrameLayout>
 
@@ -33,6 +38,19 @@
             android:id="@id/exo_controller_placeholder"
             layout="@layout/exo_player_control_view" />
 
+        <SeekBar
+            android:id="@+id/seekBar"
+           android:layout_marginVertical="100dp"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_alignParentBottom="true"
+            android:layout_marginTop="624dp"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:layout_editor_absoluteX="-16dp">
+        </SeekBar>
+
+
+
     </FrameLayout>
 
 </merge>