pedromassango

@override
  Widget build(BuildContext context){
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.white30,
        elevation: 0.0,
        title: Text('Hero Page 2',
        style: TextStyle(
          color: Colors.black
        ),),

pedromassango

class Repository() {

    fun getMessage(): String{
        return "This is a Repository message!"
    }
}

pedromassango

//... Code removed for brevity

class MainViewModel(private val repository: Repository) : ViewModel() {

    private var messageData: MutableLiveData<String>? = null

    fun loadData(): LiveData<String>?{
        if(messageData == null){
            messageData = MutableLiveData()
        }

pedromassango

object DependeciesModule {

    val appModule = module {

        // Usinlge only one instance of the giving class will run at time
        single { Repository() }
        // Koin will take care of creating ViewModel's dependencies
        viewModel { MainViewModel( get()) }
    }
}

pedromassango

class MainActivity : AppCompatActivity() {

    // we get our viewModel from Koin
    private val mainViewModel: MainViewModel by viewModel()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.main_activity)

        mainViewModel.loadData()?.observe(this, Observer{

pedromassango

class MyApp: Application() {

    override fun onCreate() {
        super.onCreate()

        // call this to setup Koin with your modules
        startKoin(this, listOf(DependeciesModule.appModule) )
    }
}

pedromassango

package com.pedromassango.programmers.extras;

import android.app.ActivityManager;
import android.content.Context;
import android.os.Process;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.widget.Toast;

import java.util.ArrayList;

pedromassango

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.pedromassango.alarmmanagersample">

    <application
        ... >
        <activity android:name=".MainActivity">
            ...
        </activity>
        

pedromassango

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <FrameLayout

pedromassango

public void onCreate() {
     super.onCreate();
  
     if (DEVELOPER_MODE) {
         StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
                 .detectDiskReads()
                 .detectDiskWrites()
                 .detectNetwork()   // ou .detectAll()
                 .penaltyLog()
                 .build());