Android App

AlarmManager/.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

AlarmManager/app/.gitignore

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+/build

AlarmManager/app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+}
+
+android {
+    compileSdk 32
+
+    defaultConfig {
+        applicationId "com.otamurod.alarmmanager"
+        minSdk 16
+        targetSdk 32
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildFeatures{
+        viewBinding true
+    }
+    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:1.5.0'
+    implementation 'com.google.android.material:material:1.6.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+}

AlarmManager/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

AlarmManager/app/src/androidTest/java/com/otamurod/alarmmanager/ExampleInstrumentedTest.kt

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+package com.otamurod.alarmmanager
+
+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.otamurod.alarmmanager", appContext.packageName)
+    }
+}

AlarmManager/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"
+    package="com.otamurod.alarmmanager">
+
+    <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.AlarmManager"
+        tools:targetApi="31">
+        <activity
+            android:name=".DestinationActivity"
+            android:exported="false" />
+        <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>
+
+        <receiver android:name=".AlarmReceiver" />
+    </application>
+
+</manifest>

AlarmManager/app/src/main/java/com/otamurod/alarmmanager/AlarmReceiver.kt

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+package com.otamurod.alarmmanager
+
+import android.app.PendingIntent
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+
+class AlarmReceiver : BroadcastReceiver() {
+    override fun onReceive(context: Context?, intent: Intent?) {
+
+        val i = Intent(context, DestinationActivity::class.java)
+        intent!!.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+        val pendingIntent = PendingIntent.getActivity(context, 0, i, 0)
+
+        val builder = NotificationCompat.Builder(context!!, "channelId")
+            .setSmallIcon(R.drawable.ic_launcher_foreground)
+            .setContentTitle("Alarm Manager")
+            .setContentText("Learn more about Android development")
+            .setAutoCancel(true)
+            .setDefaults(NotificationCompat.DEFAULT_ALL)
+            .setPriority(NotificationCompat.PRIORITY_HIGH)
+            .setContentIntent(pendingIntent)
+
+        val notificationManager = NotificationManagerCompat.from(context)
+        notificationManager.notify(123, builder.build())
+    }
+}

AlarmManager/app/src/main/java/com/otamurod/alarmmanager/DestinationActivity.kt

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+package com.otamurod.alarmmanager
+
+import android.app.AlarmManager
+import android.app.PendingIntent
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.otamurod.alarmmanager.databinding.ActivityDestinationBinding
+
+class DestinationActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityDestinationBinding
+    private lateinit var alarmManager: AlarmManager
+    private lateinit var pendingIntent: PendingIntent
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityDestinationBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.cancelAlarmBtn.setOnClickListener {
+            cancelAlarm()
+        }
+    }
+
+    private fun cancelAlarm() {
+
+        alarmManager = getSystemService(ALARM_SERVICE) as AlarmManager
+        val intent = Intent(this, AlarmReceiver::class.java)
+
+        pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0)
+
+        alarmManager.cancel(pendingIntent)
+
+        Toast.makeText(this, "Alarm Cancelled", Toast.LENGTH_SHORT).show()
+
+    }
+
+}

AlarmManager/app/src/main/java/com/otamurod/alarmmanager/MainActivity.kt

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+package com.otamurod.alarmmanager
+
+import android.app.AlarmManager
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Intent
+import android.os.Build
+import android.os.Bundle
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import com.google.android.material.timepicker.MaterialTimePicker
+import com.google.android.material.timepicker.TimeFormat
+import com.otamurod.alarmmanager.databinding.ActivityMainBinding
+import java.util.*
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityMainBinding
+    private lateinit var timePicker: MaterialTimePicker
+    private lateinit var calendar: Calendar
+    private lateinit var alarmManager: AlarmManager
+    private lateinit var pendingIntent: PendingIntent
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        createNotificationChannel()
+
+        calendar = Calendar.getInstance()
+
+        binding.selectTimeBtn.setOnClickListener {
+            showTimePicker()
+        }
+
+        binding.setAlarmBtn.setOnClickListener {
+            setAlarm()
+        }
+
+        binding.cancelAlarmBtn.setOnClickListener {
+            cancelAlarm()
+        }
+    }
+
+    private fun cancelAlarm() {
+
+        alarmManager = getSystemService(ALARM_SERVICE) as AlarmManager
+        val intent = Intent(this, AlarmReceiver::class.java)
+
+        pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0)
+
+        alarmManager.cancel(pendingIntent)
+
+        Toast.makeText(this, "Alarm Cancelled", Toast.LENGTH_SHORT).show()
+
+    }
+
+    private fun setAlarm() {
+
+        alarmManager = getSystemService(ALARM_SERVICE) as AlarmManager
+        val intent = Intent(this, AlarmReceiver::class.java)
+
+        pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0)
+
+        alarmManager.setRepeating(
+            AlarmManager.RTC_WAKEUP,
+            calendar.timeInMillis,
+            AlarmManager.INTERVAL_DAY,
+            pendingIntent
+        )
+
+        Toast.makeText(this, "Alarm Set Successfully", Toast.LENGTH_SHORT).show()
+
+    }
+
+    private fun showTimePicker() {
+        timePicker = MaterialTimePicker.Builder()
+            .setTimeFormat(TimeFormat.CLOCK_12H)
+            .setHour(12)
+            .setMinute(0)
+            .setTitleText("Select Alarm Time")
+            .build()
+
+        timePicker.show(supportFragmentManager, "time")
+
+        timePicker.addOnPositiveButtonClickListener {
+            if (timePicker.hour > 12) {
+                binding.selectedTime.text =
+                    String.format("%02d:%02d PM", timePicker.hour - 12, timePicker.minute)
+            } else {
+                binding.selectedTime.text =
+                    String.format("%02d:%02d AM", timePicker.hour, timePicker.minute)
+            }
+
+            calendar[Calendar.HOUR_OF_DAY] = timePicker.hour
+            calendar[Calendar.MINUTE] = timePicker.minute
+            calendar[Calendar.SECOND] = 0
+            calendar[Calendar.MILLISECOND] = 0
+
+        }
+    }
+
+    private fun createNotificationChannel() {
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val name: CharSequence = "RemainderChannel"
+            val description = "Channel for Alarm Manager"
+            val importance = NotificationManager.IMPORTANCE_HIGH
+            val channel = NotificationChannel("channelId", name, importance)
+            channel.description = description
+            val notificationManager = getSystemService(NotificationManager::class.java)
+
+            notificationManager.createNotificationChannel(channel)
+
+        }
+    }
+}