Implemented a notes app with features for creating, viewing, editing, and deleting notes.

Author: muradnajafli

.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

.idea/.gitignore

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+/build

.idea/.name

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("com.google.devtools.ksp")
+    id("androidx.navigation.safeargs.kotlin")
+    id("kotlin-parcelize")
+
+
+
+}
+
+android {
+    namespace = "com.example.notesapp"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "com.example.notesapp"
+        minSdk = 24
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = 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"
+    }
+    buildFeatures {
+        viewBinding = true
+    }
+}
+
+dependencies {
+
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.9.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.6.2")
+    implementation("androidx.lifecycle:lifecycle-livedata-ktx:2.6.2")
+
+
+
+    // Room
+    implementation("androidx.room:room-runtime:2.5.2")
+    implementation("androidx.navigation:navigation-fragment-ktx:2.7.3")
+    implementation("androidx.navigation:navigation-ui-ktx:2.7.3")
+    annotationProcessor("androidx.room:room-compiler:2.5.2")
+    ksp("androidx.room:room-compiler:2.5.2")
+    implementation("androidx.room:room-ktx:2.5.2")
+
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+}

.idea/compiler.xml

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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

.idea/deploymentTargetDropDown.xml

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+package com.example.notesapp
+
+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.example.notesapp", appContext.packageName)
+    }
+}

.idea/gradle.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">
+
+    <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.NotesApp"
+        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>
+    </application>
+
+</manifest>

.idea/kotlinc.xml

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+package com.example.notesapp
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import com.example.notesapp.databinding.ActivityMainBinding
+
+class MainActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityMainBinding
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+    }
+}

.idea/misc.xml

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+package com.example.notesapp.adapter
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.navigation.findNavController
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.ViewHolder
+import com.example.notesapp.data.Note
+import com.example.notesapp.databinding.NoteItemBinding
+import com.example.notesapp.fragment.NoteListFragmentDirections
+
+class NotesAdapter(val context: Context, private var noteList: List<Note>) : RecyclerView.Adapter<NotesAdapter.NotesViewHolder>() {
+
+    inner class NotesViewHolder(val binding: NoteItemBinding) : ViewHolder(binding.root)
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): NotesViewHolder {
+        val binding = NoteItemBinding.inflate(LayoutInflater.from(context), parent, false)
+        return NotesViewHolder(binding)
+    }
+
+    override fun onBindViewHolder(holder: NotesViewHolder, position: Int) {
+        val note = noteList[position]
+        val myHolder = holder.binding
+        myHolder.noteNameTv.text = note.name
+        myHolder.dateTv.text = note.date
+        myHolder.root.setOnClickListener {
+            val action = NoteListFragmentDirections.actionNoteListFragmentToDetailFragment(note)
+            it.findNavController().navigate(action)
+        }
+    }
+
+    override fun getItemCount() = noteList.size
+
+    @SuppressLint("NotifyDataSetChanged")
+    fun setData(newNotesList: List<Note>) {
+        noteList = newNotesList
+        notifyDataSetChanged()
+    }
+}

.idea/vcs.xml

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+package com.example.notesapp.data
+
+import android.os.Parcelable
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import kotlinx.parcelize.Parcelize
+
+@Parcelize
+@Entity(tableName = "notesTable")
+data class Note(
+    @PrimaryKey(autoGenerate = true) val id: Long = 0,
+    @ColumnInfo(name = "name") val name: String,
+    @ColumnInfo(name = "note") val note: String,
+    @ColumnInfo(name = "date") val date: String
+): Parcelable

app/.gitignore

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+package com.example.notesapp.data
+
+import androidx.lifecycle.LiveData
+import androidx.room.Dao
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Query
+import androidx.room.Update
+
+@Dao
+interface NoteDao {
+
+    @Query(value = "SELECT * FROM notesTable ORDER BY id ASC")
+    fun readAllData(): LiveData<List<Note>>
+
+    @Insert
+    suspend fun addNote(note: Note)
+
+    @Update
+    suspend fun updateNote(note: Note)
+
+    @Delete
+    suspend fun deleteNote(note: Note)
+
+}

app/build.gradle.kts

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+package com.example.notesapp.data
+
+import android.content.Context
+import androidx.room.Database
+import androidx.room.Room
+import androidx.room.RoomDatabase
+
+@Database(entities = [Note::class], version = 1, exportSchema = false)
+abstract class NoteDatabase : RoomDatabase() {
+
+    abstract fun noteDao(): NoteDao
+
+    companion object {
+        @Volatile
+        private var INSTANCE: NoteDatabase? = null
+
+        fun getDatabase(context: Context): NoteDatabase {
+            var tempInstance = INSTANCE
+            if (tempInstance != null) {
+                return tempInstance
+            }
+
+            synchronized(this) {
+                val instance = Room.databaseBuilder(
+                    context.applicationContext, NoteDatabase::class.java, "notes_database"
+                ).build()
+                tempInstance = instance
+                return instance
+            }
+
+        }
+
+    }
+}