Prac_8(AMP)

PRACTICAL 8 

Activity.xml


<?xml version="1.0" encoding="utf-8"?>

<androidx.constraintlayout.widget.ConstraintLayout 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"

   tools:context=".MainActivity">



   <Button

       android:id="@+id/btnstart"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:text="Start"

       app:layout_constraintBottom_toBottomOf="parent"

       app:layout_constraintEnd_toEndOf="parent"

       app:layout_constraintHorizontal_bias="0.498"

       app:layout_constraintStart_toStartOf="parent"

       app:layout_constraintTop_toTopOf="parent"

       app:layout_constraintVertical_bias="0.465" />


   <Button

       android:id="@+id/btnstop"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:text="Stop"

       app:layout_constraintBottom_toBottomOf="parent"

       app:layout_constraintEnd_toEndOf="parent"

       app:layout_constraintHorizontal_bias="0.498"

       app:layout_constraintStart_toStartOf="parent"

       app:layout_constraintTop_toTopOf="parent"

       app:layout_constraintVertical_bias="0.718" />


   <TextView

       android:id="@+id/textView2"

       android:layout_width="wrap_content"

       android:layout_height="wrap_content"

       android:text="Practical 8 -> 724_723"

       android:textSize="30dp"

       app:layout_constraintBottom_toBottomOf="parent"

       app:layout_constraintEnd_toEndOf="parent"

       app:layout_constraintHorizontal_bias="0.498"

       app:layout_constraintStart_toStartOf="parent"

       app:layout_constraintTop_toTopOf="parent"

       app:layout_constraintVertical_bias="0.342" />


</androidx.constraintlayout.widget.ConstraintLayout>




Mainactivit.kt


package com.example.practical8


import android.content.Intent

import androidx.appcompat.app.AppCompatActivity

import android.os.Bundle

import android.widget.Button

import android.widget.Toast

import androidx.appcompat.app.AlertDialog


class MainActivity : AppCompatActivity() {


   override fun onCreate(savedInstanceState: Bundle?) {

       super.onCreate(savedInstanceState)

       setContentView(R.layout.activity_main)



       val btnStart = findViewById<Button>(R.id.btnstart)

       val btnStop = findViewById<Button>(R.id.btnstop)


       btnStart.setOnClickListener{

           startService(Intent(this, ExampleService::class.java))

       }

       btnStop.setOnClickListener{

           stopService(Intent(this, ExampleService::class.java))

       }

   }


   override fun onBackPressed() {

       val builder = AlertDialog.Builder(this)

       builder.setTitle("Are you sure? - 702 & 734")

       builder.setMessage("Are you sure you want to close the app?")

       builder.setPositiveButton("Yes",{dialogInterface,i->finish()})

       builder.setNegativeButton("No",{dialogInterface, i->})

       builder.setNeutralButton("Cancel",{dialogInterface,i-> Toast.makeText(this, "Cancel button pressed",Toast.LENGTH_LONG).show()})

       builder.show()

   }

}




ExampleService.kt


package com.example.practical8


import android.app.Service

import android.content.Intent

import android.media.MediaPlayer

import android.os.IBinder

import android.widget.Toast


class ExampleService : Service(){

   lateinit var mPlayer: MediaPlayer

   override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {

       mPlayer = MediaPlayer.create(this, R.raw.music)

       mPlayer.start()

       Toast.makeText(this,"Song started", Toast.LENGTH_LONG).show()

       return START_STICKY

   }


   override fun onDestroy() {

       super.onDestroy()

       mPlayer.stop()

       Toast.makeText(this,"Song stopped", Toast.LENGTH_LONG).show()

   }


   override fun onBind(p0: Intent?): IBinder? {

       return null

   }


}



Androdimanifest.xml


<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

   xmlns:tools="http://schemas.android.com/tools">


   <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:roundIcon="@mipmap/ic_launcher_round"

       android:supportsRtl="true"

       android:theme="@style/Theme.Practical8"

       tools:targetApi="31">

       <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>

       <service android:name=".ExampleService"/>

   </application>


</manifest>

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