implemented foreground service

.gitignore

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+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+}
+
+android {
+    namespace 'com.sandeep.music_recognizer_app'
+    compileSdk 33
+
+    defaultConfig {
+        applicationId "com.sandeep.music_recognizer_app"
+        minSdk 24
+        targetSdk 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+}
+
+dependencies {
+
+    implementation 'androidx.core:core-ktx:1.7.0'
+    implementation 'androidx.appcompat:appcompat:1.6.1'
+    implementation 'com.google.android.material:material:1.8.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/sandeep/music_recognizer_app/ExampleInstrumentedTest.kt

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+package com.sandeep.music_recognizer_app
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("com.sandeep.music_recognizer_app", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission  android:name="android.permission.FOREGROUND_SERVICE"/>
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Musicrecognizerapp"
+        tools:targetApi="31">
+
+        <service
+            android:name=".ForegroundService"
+            android:enabled="true"
+            android:exported="true"
+             />
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/sandeep/music_recognizer_app/ForegroundService.kt

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+package com.sandeep.music_recognizer_app
+
+
+import android.app.Notification
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.graphics.PixelFormat
+import android.os.Build
+import android.os.IBinder
+import android.view.*
+import androidx.annotation.RequiresApi
+import androidx.core.app.NotificationCompat
+
+
+class ForegroundService : Service() {
+
+    private lateinit var mView: View
+    private lateinit var mParams: WindowManager.LayoutParams
+    private lateinit var  mWindowManager: WindowManager
+    private lateinit var  layoutInflater: LayoutInflater
+
+    override fun onBind(intent: Intent?): IBinder {
+        throw UnsupportedOperationException("Not yet implemented")
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+        // create the custom or default notification
+        // based on the android version
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) startMyOwnForeground() else startForeground(
+            1,
+            Notification()
+        )
+
+
+            mParams = WindowManager.LayoutParams(
+                WindowManager.LayoutParams.WRAP_CONTENT,
+                WindowManager.LayoutParams.WRAP_CONTENT,
+                WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
+                WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
+                        or WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH
+                        or WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
+                PixelFormat.TRANSLUCENT
+            )
+
+        mParams.gravity = Gravity.CENTER
+
+        // getting a LayoutInflater
+        layoutInflater = getSystemService(LAYOUT_INFLATER_SERVICE) as LayoutInflater
+        // inflating the view with the custom layout we created
+        mView = layoutInflater.inflate(R.layout.popup_window, null)
+        // set onClickListener on the remove button, which removes
+        // the view from the window
+        mView.findViewById<View>(R.id.window_close).setOnClickListener { onDestroy()}
+        mWindowManager = getSystemService(WINDOW_SERVICE) as WindowManager
+        mWindowManager.addView(mView, mParams)
+        dragAndDrop()
+
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        stopForeground(STOP_FOREGROUND_REMOVE)
+        mWindowManager.removeView(mView)
+        System.exit(0)
+    }
+
+    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
+        return super.onStartCommand(intent, flags, startId)
+    }
+
+    // for android version >=O we need to create
+    // custom notification stating
+    // foreground service is running
+    @RequiresApi(Build.VERSION_CODES.O)
+    private fun startMyOwnForeground() {
+        val NOTIFICATION_CHANNEL_ID = "sandeep.permanence"
+        val channelName = "Background Service"
+        val chan = NotificationChannel(
+            NOTIFICATION_CHANNEL_ID,
+            channelName,
+            NotificationManager.IMPORTANCE_MIN
+        )
+        val manager =
+            (getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager?)!!
+        manager.createNotificationChannel(chan)
+        val notificationBuilder: NotificationCompat.Builder =
+            NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID)
+        val notification: Notification = notificationBuilder.setOngoing(true)
+            .setContentTitle("Service running")
+            .setContentText("Displaying over other apps") // this is important, otherwise the notification will show the way
+            // you want i.e. it will show some default notification
+            .setSmallIcon(R.drawable.ic_launcher_foreground)
+            .setPriority(NotificationManager.IMPORTANCE_MIN)
+            .setCategory(Notification.CATEGORY_SERVICE)
+            .build()
+        startForeground(2, notification)
+    }
+
+
+    fun dragAndDrop() {
+        mView.setOnTouchListener { v, event ->
+            if (event.action == MotionEvent.ACTION_MOVE || event.action == MotionEvent.ACTION_DOWN) {
+                var xOffset = v.width / 2
+                var yOffset = v.height / 2
+                var x = event.rawX - xOffset
+                var y = event.rawY - yOffset
+                var params = WindowManager.LayoutParams(
+                    WindowManager.LayoutParams.WRAP_CONTENT,
+                    WindowManager.LayoutParams.WRAP_CONTENT,
+                    x.toInt(), y.toInt(),
+                    WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY,
+                    WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL or
+                            WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH or
+                            WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
+                    PixelFormat.TRANSLUCENT
+                )
+                params.gravity = Gravity.TOP or Gravity.START
+                mWindowManager.updateViewLayout(mView, params);
+                return@setOnTouchListener true
+            }
+            return@setOnTouchListener false
+        }
+    }
+
+
+}

app/src/main/java/com/sandeep/music_recognizer_app/MainActivity.kt

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+package com.sandeep.music_recognizer_app
+
+
+
+import android.content.Intent
+import android.os.Build
+import android.os.Bundle
+import android.provider.Settings
+import androidx.appcompat.app.AppCompatActivity
+
+
+class MainActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        checkOverlayPermission()
+        startService()
+    }
+
+    // method for starting the service
+    private fun startService() {
+        // check if the user has already granted
+        // the Draw over other apps permission
+        if (Settings.canDrawOverlays(this)) {
+            // start the service based on the android version
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                startForegroundService(Intent(this, ForegroundService::class.java))
+            } else {
+                startService(Intent(this, ForegroundService::class.java))
+            }
+        }
+    }
+
+    private fun checkOverlayPermission() {
+        if (!Settings.canDrawOverlays(this)) {
+            // send user to the device settings
+            val myIntent = Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION)
+            startActivity(myIntent)
+        }
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        stopService(Intent(this, ForegroundService::class.java))
+    }
+
+
+    override fun onResume() {
+        super.onResume()
+        startService()
+    }
+
+
+}