#2 — Job Finder App (https://youtu.be/3GkEbf8AQSQ)

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<layout 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">
    <data>
        <variable
            name="viewModel"
            type="id.haerulmuttaqin.jobfinder.ui.MainViewModel" />
    </data>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/blue_200">

        <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:elevation="0dp">

            <com.google.android.material.appbar.CollapsingToolbarLayout
                android:id="@+id/collapse"
                android:layout_width="match_parent"
                android:layout_height="280dp"
                app:collapsedTitleTextAppearance="@style/collapsedTitleStyle"
                app:contentScrim="?attr/colorPrimary"
                app:expandedTitleMarginBottom="26dp"
                app:expandedTitleMarginStart="26dp"
                app:expandedTitleTextAppearance="@style/expandedTitleStyle"
                app:layout_scrollFlags="scroll|exitUntilCollapsed|snap"
                app:title="@string/app_name"
                app:titleEnabled="true">

                <RelativeLayout
                    app:layout_collapseMode="parallax"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content">

                    <ImageView
                        android:id="@+id/banner"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:scaleType="centerCrop"
                        android:src="@drawable/banner_1" />

                    <TextView
                        android:id="@+id/welcomeText"
                        android:text="Hi, Welcome back"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="26dp"
                        android:layout_marginTop="40dp"
                        android:layout_marginEnd="10dp"
                        android:fontFamily="@font/book"
                        android:textSize="16sp"
                        android:textColor="@color/white"
                        android:layout_toStartOf="@id/notif"/>

                    <TextView
                        android:id="@+id/secondaryText"
                        android:text="Find your perfect job"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:layout_below="@id/welcomeText"
                        android:layout_marginStart="26dp"
                        android:layout_marginTop="2dp"
                        android:layout_marginEnd="10dp"
                        android:layout_toStartOf="@id/notif"
                        android:textSize="26sp"
                        android:textColor="@color/white"
                        android:fontFamily="@font/bold" />

                    <ImageView
                        android:id="@+id/notif"
                        android:layout_width="26dp"
                        android:layout_height="40dp"
                        android:layout_alignParentTop="true"
                        android:layout_alignParentEnd="true"
                        android:layout_marginTop="42dp"
                        android:layout_marginEnd="16dp"
                        android:contentDescription="@string/app_name"
                        android:src="@drawable/ic_baseline_more_vert_24"
                        android:paddingBottom="10dp"
                        app:tint="@color/white"/>

                    <LinearLayout
                        android:id="@+id/searchLayout"
                        android:orientation="vertical"
                        android:layout_alignParentBottom="true"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content">

                        <com.google.android.material.card.MaterialCardView
                            android:id="@+id/card_search"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content"
                            android:layout_marginLeft="20dp"
                            android:layout_marginRight="20dp"
                            android:layout_marginBottom="60dp"
                            app:strokeWidth="0.3dp"
                            app:cardCornerRadius="20dp"
                            app:cardElevation="0dp"
                            app:strokeColor="@color/blue_300"
                            app:cardBackgroundColor="@color/blue_250">
                            <RelativeLayout
                                android:layout_width="match_parent"
                                android:layout_height="60dp">
                                <TextView
                                    android:layout_width="match_parent"
                                    android:layout_height="wrap_content"
                                    android:text="What are you looking for?"
                                    android:singleLine="true"
                                    android:layout_centerVertical="true"
                                    android:layout_marginStart="16dp"
                                    android:layout_marginEnd="16dp"
                                    android:textColor="@color/blue_050"
                                    android:fontFamily="@font/book"
                                    android:textSize="16dp"/>
                                <ImageView
                                    android:src="@drawable/ic_round_search_24"
                                    android:layout_width="25dp"
                                    android:layout_height="60dp"
                                    android:layout_alignParentEnd="true"
                                    android:layout_marginEnd="16dp"
                                    app:tint="@color/blue_050"/>
                            </RelativeLayout>
                        </com.google.android.material.card.MaterialCardView>

                    </LinearLayout>

                </RelativeLayout>

                <androidx.appcompat.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    android:theme="@style/Theme.JobFinder.Toolbar"
                    android:fitsSystemWindows="true"
                    app:background="@android:color/transparent"
                    app:layout_collapseMode="pin"
                    app:popupTheme="@style/Theme.JobFinder.PopupOverlay"
                    app:titleTextColor="@color/white" />

            </com.google.android.material.appbar.CollapsingToolbarLayout>

        </com.google.android.material.appbar.AppBarLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/bg_rounded_top"
            app:layout_anchor="@id/appbar"
            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">

            <com.facebook.shimmer.ShimmerFrameLayout
                android:id="@+id/shimmer"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:layout_marginTop="16dp"
                app:layout_behavior="@string/appbar_scrolling_view_behavior"
                app:shimmer_duration="800"
                app:shimmer_auto_start="true">
                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical">
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                    <include layout="@layout/item_job_placeholder" />
                </LinearLayout>
            </com.facebook.shimmer.ShimmerFrameLayout>
            
            <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
                android:id="@+id/swipeRefresh"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginTop="16dp">
                <androidx.recyclerview.widget.RecyclerView
                    android:id="@+id/recyclerView"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginStart="5dp"
                    android:layout_marginEnd="5dp"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior"
                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent" />
            </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

            <LinearLayout
                android:id="@+id/emptyView"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:fillViewport="true"
                android:clickable="false"
                android:focusable="false"
                app:layout_behavior="@string/appbar_scrolling_view_behavior"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent">
                <ImageView
                    android:layout_width="250dp"
                    android:layout_height="250dp"
                    android:layout_gravity="center"
                    android:layout_marginTop="100dp"
                    android:src="@drawable/ic_undraw_empty" />
                <TextView
                    android:id="@+id/textEmpty"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:paddingStart="16dp"
                    android:paddingTop="16dp"
                    android:paddingEnd="16dp"
                    android:text="No Data Found"
                    android:fontFamily="@font/medium"/>
                <TextView
                    android:id="@+id/textEmptyErr"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:gravity="center"
                    android:paddingStart="16dp"
                    android:paddingBottom="16dp"
                    android:paddingEnd="16dp"
                    android:fontFamily="@font/book"/>
            </LinearLayout>

            <ImageView
                android:id="@+id/shadow"
                android:layout_width="match_parent"
                android:layout_height="35dp"
                android:layout_marginTop="16dp"
                android:src="@drawable/bg_shadow_up_to_down"
                android:visibility="visible" />

            <ImageView
                android:background="@drawable/bg_strip_round"
                android:layout_width="40dp"
                android:layout_height="5dp"
                android:layout_marginTop="8dp"
                android:layout_centerHorizontal="true"/>

        </RelativeLayout>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

</layout>

item_job_placeholder.xml

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="10dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="10dp"
    app:cardCornerRadius="10dp"
    app:cardElevation="0dp"
    app:strokeWidth="1dp">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:layout_marginTop="10dp" >

        <View
            android:id="@+id/icon"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:gravity="center"
            android:layout_gravity="center"
            android:layout_marginStart="10dp"
            android:background="@drawable/bg_photo_item" />

        <View
            android:id="@+id/title"
            android:layout_marginStart="16dp"
            android:layout_toEndOf="@id/icon"
            android:layout_width="180dp"
            android:layout_height="17dp"
            android:layout_marginTop="2dp"
            android:layout_marginEnd="16dp"
            android:background="@drawable/bg_strip_round" />
        <View
            android:id="@+id/subtitle"
            android:layout_below="@id/title"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="130dp"
            android:layout_width="110dp"
            android:layout_toEndOf="@id/icon"
            android:layout_height="10dp"
            android:layout_marginTop="10dp"
            android:background="@drawable/bg_strip_round" />

        <View
            android:layout_below="@id/subtitle"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="130dp"
            android:layout_marginBottom="20dp"
            android:layout_width="140dp"
            android:layout_toEndOf="@id/icon"
            android:layout_height="10dp"
            android:layout_marginTop="5dp"
            android:background="@drawable/bg_strip_round" />

    </RelativeLayout>

</com.google.android.material.card.MaterialCardView>

MainActivity.java

import android.os.Bundle;
import android.view.View;

import androidx.annotation.Nullable;
import androidx.lifecycle.ViewModelProvider;

import javax.inject.Inject;

import id.haerulmuttaqin.jobfinder.R;
import id.haerulmuttaqin.jobfinder.base.BaseActivity;
import id.haerulmuttaqin.jobfinder.data.api.ConnectionServer;
import id.haerulmuttaqin.jobfinder.databinding.ActivityMainBinding;

public class MainActivity extends BaseActivity<ActivityMainBinding, MainViewModel> implements  MainViewModel.Navigator {
    
    @Inject ConnectionServer server;
    private ActivityMainBinding binding;
    private MainViewModel viewModel;
    
    @Override
    public int getBindingVariable() {
        return 0;
    }
    
    @Override
    public int getLayoutId() {
        return R.layout.activity_main;
    }
    
    @Override
    public MainViewModel getViewModel() {
        return viewModel;
    }
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = getViewDataBinding();
        viewModel = new ViewModelProvider(this, new MainViewModel.ModelFactory(this, server)).get(MainViewModel.class);
        viewModel.setNavigator(this);
        viewModel.getJobFromServer();
        viewModel.jobList.observe(this, githubJobs -> {
            binding.recyclerView.setAdapter(new MainAdapter(githubJobs));
        });
        binding.swipeRefresh.setOnRefreshListener(()->viewModel.getJobFromServer());
    }

    @Override
    public void showProgress() {
        binding.swipeRefresh.setRefreshing(true);
        binding.emptyView.setVisibility(View.GONE);
        binding.shimmer.setVisibility(View.VISIBLE);
        binding.shimmer.startShimmer();
        binding.recyclerView.setVisibility(View.GONE);
    }

    @Override
    public void hideProgress() {
        binding.swipeRefresh.setRefreshing(false);
        binding.emptyView.setVisibility(View.GONE);
        binding.shimmer.setVisibility(View.GONE);
        binding.shimmer.stopShimmer();
        binding.recyclerView.setVisibility(View.VISIBLE);
    }

    @Override
    public void onGetResult(boolean status, String message) {
        if (!status) { //<-- status result is FALSE
            binding.textEmptyErr.setText(message);
            binding.emptyView.setVisibility(View.VISIBLE);
        } else {
            binding.emptyView.setVisibility(View.GONE);
        }
    }
}

MainViewModel.java

package id.haerulmuttaqin.jobfinder.ui;

import android.content.Context;

import androidx.annotation.NonNull;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;
import androidx.lifecycle.ViewModelProvider;

import java.util.List;

import id.haerulmuttaqin.jobfinder.Utils;
import id.haerulmuttaqin.jobfinder.base.BaseViewModel;
import id.haerulmuttaqin.jobfinder.data.api.ConnectionServer;
import id.haerulmuttaqin.jobfinder.data.entity.GithubJob;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class MainViewModel extends BaseViewModel<MainViewModel.Navigator> {
    
    MutableLiveData<List<GithubJob>> jobList = new MutableLiveData<>();
    
    public MainViewModel(Context context, ConnectionServer connectionServer) {
        super(context, connectionServer);
    }

    public String formatDate(String date){
        return Utils.dateToTimeFormat(date);
    }
    
    public void getJobFromServer() {
        getNavigator().showProgress();
        getConnectionServer().getJobList().enqueue(new Callback<List<GithubJob>>() {
            @Override
            public void onResponse(Call<List<GithubJob>> call, Response<List<GithubJob>> response) {
                if (response.isSuccessful() && response.body().size() > 0) {
                    jobList.postValue(response.body());
                    getNavigator().onGetResult(true, "Success");
                }
                getNavigator().hideProgress();
            }

            @Override
            public void onFailure(Call<List<GithubJob>> call, Throwable t) {
                t.getLocalizedMessage();
                getNavigator().hideProgress();
                getNavigator().onGetResult(false, Utils.errorMessageHandler(call, t));
            }
        });
    }

    public static class ModelFactory implements ViewModelProvider.Factory {
        private Context context;
        private ConnectionServer server;
        public ModelFactory(Context context, ConnectionServer server) {
            this.context = context;
            this.server = server;
        }
        @NonNull
        @Override
        public <T extends ViewModel> T create(@NonNull Class<T> modelClass) {
            return (T) new MainViewModel(context, server);
        }
    }
    
    interface Navigator {
        void showProgress();
        void hideProgress();
        void onGetResult(boolean status, String message);
    }
}