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shovoncseshovoncse
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assignment 7 by shovan
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‎.gitignore

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

‎.idea/.gitignore

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‎app/.gitignore

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/build

‎app/build.gradle.kts

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plugins {
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id("com.android.application")
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id("org.jetbrains.kotlin.android")
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}
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android {
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namespace = "com.example.bmi_viewmodel"
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compileSdk = 34
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defaultConfig {
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applicationId = "com.example.bmi_viewmodel"
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minSdk = 34
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targetSdk = 34
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versionCode = 1
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versionName = "1.0"
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testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
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vectorDrawables {
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useSupportLibrary = true
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}
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}
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buildTypes {
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release {
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isMinifyEnabled = false
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proguardFiles(
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getDefaultProguardFile("proguard-android-optimize.txt"),
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"proguard-rules.pro"
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)
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_1_8
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targetCompatibility = JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = "1.8"
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}
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buildFeatures {
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compose = true
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}
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composeOptions {
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kotlinCompilerExtensionVersion = "1.5.1"
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}
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packaging {
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resources {
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excludes += "/META-INF/{AL2.0,LGPL2.1}"
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}
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}
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}
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dependencies {
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implementation("androidx.core:core-ktx:1.12.0")
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implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.7.0")
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implementation("androidx.activity:activity-compose:1.8.2")
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implementation(platform("androidx.compose:compose-bom:2023.08.00"))
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implementation("androidx.compose.ui:ui")
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implementation("androidx.compose.ui:ui-graphics")
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implementation("androidx.compose.ui:ui-tooling-preview")
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implementation("androidx.compose.material3:material3")
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implementation("androidx.lifecycle:lifecycle-viewmodel-compose:2.7.0")
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testImplementation("junit:junit:4.13.2")
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androidTestImplementation("androidx.test.ext:junit:1.1.5")
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androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
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androidTestImplementation(platform("androidx.compose:compose-bom:2023.08.00"))
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androidTestImplementation("androidx.compose.ui:ui-test-junit4")
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debugImplementation("androidx.compose.ui:ui-tooling")
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debugImplementation("androidx.compose.ui:ui-test-manifest")
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}

‎app/proguard-rules.pro

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

‎app/src/androidTest/java/com/example/bmi_viewmodel/ExampleInstrumentedTest.kt

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

‎app/src/main/AndroidManifest.xml

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

‎app/src/main/java/com/example/bmi_viewmodel/BodyMassViewModel.kt

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package com.example.bmi_viewmodel
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import androidx.compose.runtime.MutableState
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import androidx.compose.runtime.mutableStateOf
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import androidx.lifecycle.ViewModel
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class BodyMassViewModel: ViewModel() {
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val heightInput: MutableState<String> = mutableStateOf("")
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val weightInput: MutableState<String> = mutableStateOf("")
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private var bmi: MutableState<Float> = mutableStateOf(0.0f)
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private var bmiStatus: MutableState<String> = mutableStateOf("")
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// Methods for updating member variables when data changes
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fun updateHeightInput(newHeight: String) {
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heightInput.value = newHeight.replace(',', '.')
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calculateBMI()
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}
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fun updateWeightInput(newWeight: String) {
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weightInput.value = newWeight.replace(',', '.')
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calculateBMI()
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}
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// Getter for the BMI result
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fun getBMI(): MutableState<Float> {
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return bmi
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}
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// Getter for the BMI status
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fun getBMIStatus(): MutableState<String> {
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return bmiStatus
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}
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// Private method for calculation
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private fun calculateBMI() {
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val heightInCm = heightInput.value.toFloatOrNull() ?: 0.0f
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val weightInKg = weightInput.value.toFloatOrNull() ?: 0.0f
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// Convert height from cm to meters
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val heightInMeters = heightInCm / 100
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bmi.value = if (weightInKg > 0 && heightInMeters > 0) {
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weightInKg / (heightInMeters * heightInMeters)
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} else {
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0.0f
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}
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updateBMIStatus()
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}
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// Method to update BMI status
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private fun updateBMIStatus() {
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val bmiValue = bmi.value
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bmiStatus.value = when {
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bmiValue < 18.5f -> "Underweight"
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bmiValue < 24.9f -> "Normal weight"
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bmiValue < 29.9f -> "Overweight"
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else -> "Obese"
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}
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}
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}

‎app/src/main/java/com/example/bmi_viewmodel/MainActivity.kt

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package com.example.bmi_viewmodel
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import android.os.Bundle
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import androidx.activity.ComponentActivity
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import androidx.activity.compose.setContent
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import androidx.activity.viewModels
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import androidx.compose.foundation.layout.Arrangement
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.fillMaxSize
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import androidx.compose.foundation.layout.fillMaxWidth
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.text.KeyboardOptions
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import androidx.compose.material3.MaterialTheme
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import androidx.compose.material3.OutlinedTextField
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import androidx.compose.material3.Surface
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import androidx.compose.material3.Text
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import androidx.compose.material3.Button
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.getValue
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.res.stringResource
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import androidx.compose.ui.text.input.KeyboardType
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import androidx.compose.ui.text.style.TextAlign
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import androidx.compose.ui.tooling.preview.Preview
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import androidx.compose.ui.unit.dp
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import androidx.compose.ui.unit.sp
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import androidx.compose.runtime.remember
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import androidx.compose.runtime.mutableStateOf
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import androidx.compose.runtime.setValue
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import androidx.compose.ui.text.font.FontWeight
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import androidx.lifecycle.viewmodel.compose.viewModel
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import com.example.bmi_viewmodel.ui.theme.BMIViewModelTheme
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class MainActivity : ComponentActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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val viewModel by viewModels<BodyMassViewModel>()
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super.onCreate(savedInstanceState)
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setContent {
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BMIViewModelTheme {
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// A surface container using the 'background' color from the theme
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Surface(
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modifier = Modifier.fillMaxSize(),
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color = MaterialTheme.colorScheme.background
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) {
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BodyMass(viewModel)
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}
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}
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}
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}
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}
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@Composable
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fun BodyMass(viewModel: BodyMassViewModel) {
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var showBMI by remember { mutableStateOf(false) }
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Column(
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modifier = Modifier.padding(2.dp),
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verticalArrangement = Arrangement.spacedBy(8.dp)
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) {
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Text(
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text = "Body Mass Index",
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fontSize = 24.sp,
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color = MaterialTheme.colorScheme.primary,
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textAlign = TextAlign.Center,
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modifier = Modifier
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.fillMaxWidth()
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.padding(top = 16.dp, bottom = 16.dp)
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)
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OutlinedTextField(
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value = viewModel.heightInput.value,
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onValueChange = { viewModel.updateHeightInput(it)},
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label = { Text("Height (cm)") },
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singleLine = true,
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keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
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modifier = Modifier.fillMaxWidth()
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)
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OutlinedTextField(
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value = viewModel.weightInput.value,
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onValueChange = { viewModel.updateWeightInput(it)},
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label = { Text("Weight (kg)") },
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singleLine = true,
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keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
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modifier = Modifier.fillMaxWidth()
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)
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Button(
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onClick = { showBMI = true },
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modifier = Modifier
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.padding(10.dp)
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.fillMaxWidth()
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) {
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Text(text = "CALCULATE")
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}
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if (showBMI) {
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Text(
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text = stringResource(R.string.body_mass_index_is, String.format("%2f", viewModel.getBMI().value).replace(',', '.')) + viewModel.getBMI().value,
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modifier = Modifier.padding(top = 16.dp),
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fontSize = 20.sp
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)
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Text(
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text = "${viewModel.getBMIStatus().value}",
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color = if (viewModel.getBMIStatus().value == "Normal weight") MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.error,
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fontSize = 24.sp,
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fontWeight = FontWeight.Bold,
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modifier = Modifier
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.fillMaxWidth()
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.padding(top = 16.dp, bottom = 16.dp),
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textAlign = TextAlign.Center
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)
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}
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}
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}
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@Preview(showBackground = true)
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@Composable
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fun GreetingPreview() {
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BMIViewModelTheme {
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BodyMass(viewModel())
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}
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}

‎app/src/main/java/com/example/bmi_viewmodel/ui/theme/Color.kt

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package com.example.bmi_viewmodel.ui.theme
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import androidx.compose.ui.graphics.Color
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val Purple80 = Color(0xFFD0BCFF)
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val PurpleGrey80 = Color(0xFFCCC2DC)
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val Pink80 = Color(0xFFEFB8C8)
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val Purple40 = Color(0xFF6650a4)
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val PurpleGrey40 = Color(0xFF625b71)
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val Pink40 = Color(0xFF7D5260)

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