Operacao_KOTLIN

activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".Operacao"
    android:orientation="vertical"
    >

    <EditText
        android:id="@+id/num1"
        android:hint="@string/num1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="numberDecimal" />

    <EditText
        android:id="@+id/num2"
        android:hint="@string/num2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="numberDecimal" />

    <Button
        android:id="@+id/btSOMA"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/c_lcular"
         />

    <TextView
        android:id="@+id/reSOMA"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        />
</LinearLayout>

build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "operacao_kotlin.android.dominando.operacao1"
        minSdkVersion 15
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary = true
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0-alpha1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.android.support:design:28.0.0-alpha1'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

error.log

09-23 19:20:44.871 4463-4463/operacao_kotlin.android.dominando.operacao1 E/AndroidRuntime: FATAL EXCEPTION: main
    Process: operacao_kotlin.android.dominando.operacao1, PID: 4463
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{operacao_kotlin.android.dominando.operacao1/operacao_kotlin.android.dominando.operacao1.MathOperation}: java.lang.ClassNotFoundException: Didn't find class "operacao_kotlin.android.dominando.operacao1.MathOperation" on path: DexPathList[[zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/base.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_dependencies_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_resources_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_0_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_1_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_2_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_3_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_4_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_5_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_6_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_7_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_8_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/lib/x86, /system/lib, /vendor/lib]]
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2679)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
09-23 19:20:44.873 4463-4463/operacao_kotlin.android.dominando.operacao1 E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "operacao_kotlin.android.dominando.operacao1.MathOperation" on path: DexPathList[[zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/base.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_dependencies_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_resources_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_0_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_1_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_2_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_3_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_4_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_5_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_6_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_7_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_8_apk.apk", zip file "/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/lib/x86, /system/lib, /vendor/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.Instrumentation.newActivity(Instrumentation.java:1174)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2669)
        	... 9 more
    	Suppressed: java.io.IOException: No original dex files found for dex location /data/app/operacao_kotlin.android.dominando.operacao1-yOjSTiVEp_bsk-Pcty6Tbw==/split_lib_resources_apk.apk
        at dalvik.system.DexFile.openDexFileNative(Native Method)
        at dalvik.system.DexFile.openDexFile(DexFile.java:353)
        at dalvik.system.DexFile.<init>(DexFile.java:100)
        at dalvik.system.DexFile.<init>(DexFile.java:74)
        at dalvik.system.DexPathList.loadDexFile(DexPathList.java:374)
        at dalvik.system.DexPathList.makeDexElements(DexPathList.java:337)
        at dalvik.system.DexPathList.<init>(DexPathList.java:157)
        at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
        at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
        at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)
        at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)
        at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:69)
        at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:35)
        at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:693)
        at android.app.LoadedApk.getClassLoader(LoadedApk.java:727)
        at android.app.LoadedApk.getResources(LoadedApk.java:954)
        at android.app.ContextImpl.createAppContext(ContextImpl.java:2270)
        at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5639)
        at android.app.ActivityThread.-wrap1(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1656)
        		... 6 more

file.png

https://drive.google.com/file/d/1shKqto1uD4cX2dMTLHlesbJ91lZKyKtX/view?usp=sharing

Operacao.kt

package operacao_kotlin.android.dominando.operacao1

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.EditText
import android.widget.TextView
import android.widget.Toast

class Operacao : AppCompatActivity() {
    
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_operacao)
        
        
        val reSOMA = findViewById<TextView>(R.id.reSOMA)
        val btSOMA = findViewById<Button>(R.id.btSOMA)
        
        btSOMA.setOnClickListener(
         {reSOMA.text = (getNum1()+getNum2()).toString()
             Toast.makeText(this, reSOMA, Toast.LENGTH_SHORT).show()
        })
        
    }
    
    fun getNum1(): Int {
        val num1 =findViewById(R.id.num1) as EditText
        return Integer.parseInt(num1.text.toString())
    }
    
    fun getNum2(): Int{
        val num2 = findViewById(R.id.num2) as EditText
        return Integer.parseInt(num2.text.toString())
    }
}