Uploading app

.gitignore

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+# Built application files
+*.apk
+*.ap_
+
+# Files for the ART/Dalvik VM
+*.dex
+
+# Java class files
+*.class
+
+# Generated files
+bin/
+gen/
+out/
+
+# Gradle files
+.gradle/
+gradlew.bat
+gradlew
+build/
+gradle.properties
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Proguard folder generated by Eclipse
+proguard/
+
+# Log Files
+*.log
+
+# Android Studio Navigation editor temp files
+.navigation/
+
+# Android Studio captures folder
+captures/
+
+# Intellij
+*.iml
+*.iws
+.idea
+.idea/tasks.xml
+.idea/workspace.xml
+
+# OS
+.DS_Store
+
+# Keystore files
+*.jks

README.md

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+# ContactList-RoomDB-TypeConverters

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+    id 'kotlin-kapt'
+    id 'kotlin-android-extensions'
+}
+apply plugin: 'kotlin-kapt'
+
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.example.roomdatabaseexample"
+        minSdkVersion 16
+        targetSdkVersion 30
+        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 {
+    def room_version = "2.3.0"
+
+    implementation("androidx.room:room-runtime:$room_version")
+    annotationProcessor "androidx.room:room-compiler:$room_version"
+
+    // To use Kotlin annotation processing tool (kapt)
+    kapt("androidx.room:room-compiler:$room_version")
+
+    // optional - Kotlin Extensions and Coroutines support for Room
+    implementation("androidx.room:room-ktx:$room_version")
+
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.9"
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.5.0'
+    implementation 'androidx.appcompat:appcompat:1.3.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

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/example/roomdatabaseexample/ExampleInstrumentedTest.kt

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+package com.example.roomdatabaseexample
+
+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.roomdatabaseexample", 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"
+    package="com.example.roomdatabaseexample">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.RoomDatabaseExample">
+        <activity android:name=".AddRecordActivity"></activity>
+        <activity android:name=".MainActivity">
+            <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/example/roomdatabaseexample/AddRecordActivity.kt

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+package com.example.roomdatabaseexample
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.widget.Toast
+import com.example.roomdatabaseexample.database.ConactDatabase
+import com.example.roomdatabaseexample.model.Contact
+import kotlinx.android.synthetic.main.activity_add_record.*
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import java.util.*
+
+class AddRecordActivity : AppCompatActivity() {
+    lateinit var database: ConactDatabase
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_add_record)
+
+        database = ConactDatabase.getDatabaseInstance(this)
+
+
+        submit.setOnClickListener {
+            if(validateInput()){
+                addContact(inputName.text.toString(), inputMobile.text.toString(), inputGender.text.toString())
+            }else{
+                Toast.makeText( this@AddRecordActivity,"Please enter proper details", Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
+
+
+
+
+    private fun validateInput():Boolean {
+        //basic validation only
+        return !(inputName.text.toString() == "" || inputGender.text.toString() == "" || inputMobile.text.toString() == "")
+    }
+
+    private fun addContact(name: String, mobile: String, gender: String){
+        GlobalScope.launch(Dispatchers.IO) {
+            database.getContactDao().insertContact(Contact(0, name, mobile, Date(), gender ))
+
+            withContext(Dispatchers.Main){
+                finish()
+            }
+        }
+    }
+
+    }

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

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+package com.example.roomdatabaseexample
+
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AlertDialog
+import androidx.appcompat.app.AppCompatActivity
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.example.roomdatabaseexample.adapter.ContactsAdapter
+import com.example.roomdatabaseexample.adapter.IContactAdapter
+import com.example.roomdatabaseexample.database.ConactDatabase
+import com.example.roomdatabaseexample.model.Contact
+
+import kotlinx.android.synthetic.main.activity_main.*
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+import java.util.*
+
+class MainActivity : AppCompatActivity(), IContactAdapter {
+    lateinit var database: ConactDatabase
+    lateinit var contactsAdapter: ContactsAdapter
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        database = ConactDatabase.getDatabaseInstance(this)
+        setRV()
+
+        database.getContactDao().getContacts()
+            .observe(this, androidx.lifecycle.Observer { response ->
+                contactsAdapter.contactList = response
+
+            })
+        fab.setOnClickListener {
+            val intent = Intent(this@MainActivity, AddRecordActivity::class.java)
+            startActivity(intent)
+        }
+
+
+    }
+
+    private fun setRV() {
+        contactsAdapter = ContactsAdapter(this)
+        recyclerView.apply {
+            layoutManager = LinearLayoutManager(this@MainActivity)
+            setHasFixedSize(true)
+            adapter = contactsAdapter
+        }
+    }
+
+    override fun onItemClicked(contact: Contact) {
+        val builder = AlertDialog.Builder(this@MainActivity)
+            .setTitle("Confirm Dialog")
+            .setMessage("Do you really want to delete the selected contact?")
+            .setCancelable(false)
+            .setPositiveButton("Delete") { dialogInterface, which ->
+                GlobalScope.launch {
+                    database.getContactDao().deleteContact(contact)
+                }
+            }
+            .setNegativeButton("Cancel") { dialogInterface, which ->
+
+            }
+        val alertDialog: AlertDialog = builder.create()
+        alertDialog.show()
+
+    }
+}

app/src/main/java/com/example/roomdatabaseexample/adapter/ContactsAdapter.kt

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+package com.example.roomdatabaseexample.adapter
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.AsyncListDiffer
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import com.example.roomdatabaseexample.model.Contact
+import com.example.roomdatabaseexample.R
+import java.text.SimpleDateFormat
+import java.util.*
+
+class ContactsAdapter(private val listener:IContactAdapter) : RecyclerView.Adapter<ContactsAdapter.ContactViewHolder>() {
+
+    class ContactViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {
+        val name = itemView.findViewById<TextView>(R.id.name)
+        val gender = itemView.findViewById<TextView>(R.id.gender)
+        val mobile = itemView.findViewById<TextView>(R.id.mobile)
+        val date = itemView.findViewById<TextView>(R.id.date)
+        val delete = itemView.findViewById<ImageView>(R.id.delete)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ContactViewHolder {
+        val contactViewHolder =  ContactViewHolder(
+            LayoutInflater.from(parent.context).inflate(R.layout.row, parent, false)
+        )
+        contactViewHolder.delete.setOnClickListener {
+            listener.onItemClicked(contactList[contactViewHolder.adapterPosition])
+        }
+        return contactViewHolder
+    }
+
+    override fun onBindViewHolder(holder: ContactViewHolder, position: Int) {
+        val contact = contactList[position]
+        holder.name.text = contact.name
+        holder.gender.text = "Gender: "+ contact.gender
+        holder.mobile.text = contact.mobile
+        holder.date.text = formatDate(contact.date)
+
+    }
+
+    override fun getItemCount() = contactList.size
+
+
+    private fun formatDate(date: Date): String {
+        return SimpleDateFormat("dd/MM/yyyy HH:mm:ss").format(date)
+    }
+
+    //updating List
+    private val differCallback = object : DiffUtil.ItemCallback<Contact>() {
+        override fun areItemsTheSame(oldItem: Contact, newItem: Contact): Boolean {
+            return oldItem == newItem
+        }
+
+        override fun areContentsTheSame(oldItem: Contact, newItem: Contact): Boolean {
+            return oldItem.name == newItem.name
+        }
+    }
+
+    private val differ = AsyncListDiffer(this, differCallback)
+    var contactList: List<Contact>
+        get() = differ.currentList
+        set(value) {
+            differ.submitList(value)
+        }
+
+
+}
+
+interface IContactAdapter {
+    fun onItemClicked(contact: Contact)
+
+}