[FEATURE] add onboarding screen with hardcoded text and images

app/src/main/AndroidManifest.xml

@@ -45,6 +45,11 @@
             android:screenOrientation="portrait"
             android:theme="@style/AppTheme"
             android:windowSoftInputMode="stateAlwaysHidden|adjustResize" />
+        <activity
+            android:name=".OnboardingActivity"
+            android:screenOrientation="portrait"
+            android:theme="@style/AppTheme"
+            android:windowSoftInputMode="stateAlwaysHidden|adjustResize" />
 
         <receiver android:name=".net.NetworkChangeReceiver">
             <intent-filter>

app/src/main/java/ro/code4/monitorizarevot/OnboardingActivity.java

@@ -0,0 +1,135 @@
+package ro.code4.monitorizarevot;
+
+import android.arch.lifecycle.ViewModelProviders;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.view.ViewPager;
+import android.view.View;
+import android.widget.Button;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import ro.code4.monitorizarevot.adapter.OnboardingAdapter;
+import ro.code4.monitorizarevot.db.Preferences;
+import ro.code4.monitorizarevot.net.model.OnboardingItem;
+import ro.code4.monitorizarevot.observable.ObservableListener;
+import ro.code4.monitorizarevot.viewmodel.OnboardingViewModel;
+
+import ro.code4.monitorizarevot.R;
+
+public class OnboardingActivity extends BaseActivity<OnboardingViewModel> {
+    private Button buttonPrevious, buttonNext;
+
+    private List<OnboardingItem> items;
+
+    private ViewPager onboardingViewPager;
+    private int currentPosition;
+
+    // TODO get onboarding items dynamically
+    private List<OnboardingItem> getOnboardingItems() {
+        List<OnboardingItem> items = new ArrayList<>();
+
+        OnboardingItem item1 = new OnboardingItem(1, getString(R.string.onboarding_title_1), getString(R.string.onboarding_description_1), R.drawable.ic_onboarding_building);
+        items.add(item1);
+
+        OnboardingItem item2 = new OnboardingItem(2, getString(R.string.onboarding_title_2), getString(R.string.onboarding_description_2), R.drawable.ic_onboarding_form);
+        items.add(item2);
+
+        OnboardingItem item3 = new OnboardingItem(3, getString(R.string.onboarding_title_3), getString(R.string.onboarding_description_3), R.drawable.ic_onboarding_note);
+        items.add(item3);
+
+        return items;
+    }
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_onboarding);
+
+        items = getOnboardingItems();
+
+        onboardingViewPager = findViewById(R.id.onboarding_viewpager);
+        buttonNext = findViewById(R.id.btn_next);
+        buttonPrevious = findViewById(R.id.btn_previous);
+
+        OnboardingAdapter onboardingAdapter = new OnboardingAdapter(this, items);
+        onboardingViewPager.setAdapter(onboardingAdapter);
+        onboardingViewPager.addOnPageChangeListener(onPageChangeListener);
+
+        buttonPrevious.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                onboardingViewPager.setCurrentItem(currentPosition - 1);
+            }
+        });
+
+        buttonNext.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                if (currentPosition == items.size() - 1) {
+                    goToLogin();
+                } else {
+                    onboardingViewPager.setCurrentItem(currentPosition + 1);
+                }
+            }
+        });
+
+        Preferences.hasSeenOnboarding().startRequest(new PreferencesSubscriber());
+    }
+
+    @Override
+    protected void setupViewModel() {
+        viewModel = ViewModelProviders.of(this, factory).get(OnboardingViewModel.class);
+    }
+
+    private class PreferencesSubscriber extends ObservableListener<Boolean> {
+
+        @Override
+        public void onNext(Boolean hasSeenOnboarding) {
+            super.onNext(hasSeenOnboarding);
+            if (hasSeenOnboarding) {
+                goToLogin();
+            }
+        }
+
+        @Override
+        public void onSuccess() {
+
+        }
+    }
+
+    ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {
+        @Override
+        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+
+        }
+
+        @Override
+        public void onPageSelected(int position) {
+            currentPosition = position;
+
+            if (position == 0) {
+                buttonPrevious.setVisibility(View.INVISIBLE);
+            } else if (position == items.size() - 1) {
+                buttonNext.setText(getString(R.string.onboarding_continue));
+            } else {
+                buttonPrevious.setVisibility(View.VISIBLE);
+
+                buttonNext.setText(getString(R.string.onboarding_next));
+            }
+        }
+
+        @Override
+        public void onPageScrollStateChanged(int state) {
+
+        }
+    };
+
+    private void goToLogin() {
+        Preferences.saveSeenOnboarding(true);
+        startActivity(new Intent(OnboardingActivity.this, LoginActivity.class));
+        finish();
+    }
+}

app/src/main/java/ro/code4/monitorizarevot/StartActivity.java

@@ -29,7 +29,7 @@ private class PreferencesSubscriber extends ObservableListener<Boolean> {
         public void onNext(Boolean hasCredentials) {
             super.onNext(hasCredentials);
             startActivity(new Intent(StartActivity.this,
-                                     hasCredentials ? ToolbarActivity.class : LoginActivity.class));
+                                     hasCredentials ? ToolbarActivity.class : OnboardingActivity.class));
         }
 
         @Override

app/src/main/java/ro/code4/monitorizarevot/adapter/OnboardingAdapter.java

@@ -0,0 +1,62 @@
+package ro.code4.monitorizarevot.adapter;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.support.constraint.ConstraintLayout;
+import android.support.v4.view.PagerAdapter;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import java.util.List;
+import ro.code4.monitorizarevot.net.model.OnboardingItem;
+
+import ro.code4.monitorizarevot.R;
+
+public class OnboardingAdapter extends PagerAdapter {
+    private Context context;
+    private List<OnboardingItem> items;
+
+    public OnboardingAdapter(Context context, List<OnboardingItem> items) {
+        this.context = context;
+        this.items = items;
+    }
+
+    @Override
+    public int getCount() {
+        return items.size();
+    }
+
+    @Override
+    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
+        return view == object;
+    }
+
+    @NonNull
+    @Override
+    public Object instantiateItem(@NonNull ViewGroup container, int position) {
+        View view = ((LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE))
+                .inflate(R.layout.item_onboarding_page, container, false);
+
+        OnboardingItem item = items.get(position);
+
+        TextView onboardingTitle = view.findViewById(R.id.onboarding_title);
+        ImageView onboardingIcon = view.findViewById(R.id.onboarding_icon);
+        TextView onboardingDescription = view.findViewById(R.id.onboarding_description);
+
+        onboardingTitle.setText(item.getTitle());
+        onboardingIcon.setImageResource(item.getImageResource());
+        onboardingDescription.setText(item.getDescription());
+
+        container.addView(view);
+
+        return view;
+    }
+
+    @Override
+    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
+        container.removeView((ConstraintLayout) object);
+    }
+}

app/src/main/java/ro/code4/monitorizarevot/dagger/ActivityBindingModule.java

@@ -3,12 +3,16 @@
 import dagger.Module;
 import dagger.android.ContributesAndroidInjector;
 import ro.code4.monitorizarevot.LoginActivity;
+import ro.code4.monitorizarevot.OnboardingActivity;
 import ro.code4.monitorizarevot.StartActivity;
 import ro.code4.monitorizarevot.ToolbarActivity;
 
 @Module(includes = {ViewModelModule.class})
 public abstract class ActivityBindingModule {
 
+    @ContributesAndroidInjector
+    abstract OnboardingActivity activityOnboarding();
+
     @ContributesAndroidInjector
     abstract StartActivity activityStart();
 

app/src/main/java/ro/code4/monitorizarevot/dagger/ViewModelModule.java

@@ -14,6 +14,11 @@ public abstract class ViewModelModule {
     @Binds
     abstract ViewModelProvider.Factory bindViewModelFactory(ViewModelFactory factory);
 
+    @Binds
+    @IntoMap
+    @ViewModelKey(OnboardingViewModel.class)
+    abstract ViewModel bindOnboardingViewModel(OnboardingViewModel viewModel);
+
     @Binds
     @IntoMap
     @ViewModelKey(StartViewModel.class)

app/src/main/java/ro/code4/monitorizarevot/db/Preferences.java

@@ -10,6 +10,7 @@ public class Preferences {
     private static final String PREFS_BRANCH_NUMBER = "PREFS_BRANCH_NUMBER";
     private static final String PREFS_USERNAME = "PREFS_USERNAME";
     private static final String PREFS_TOKEN = "PREFS_TOKEN";
+    private static final String PREFS_ONBOARDING = "PREFS_ONBOARDING";
 
     public static void clear() {
         Prefs.clear();
@@ -55,6 +56,10 @@ public static boolean hasBranch() {
         return getCountyCode() != null && getBranchNumber() != -1;
     }
 
+    public static void saveSeenOnboarding(boolean hasSeenOnboarding) {
+        Prefs.putBoolean(PREFS_ONBOARDING, hasSeenOnboarding);
+    }
+
     public static ObservableRequest<Boolean> isAlreadyLoggedIn() {
         return new ObservableRequest<>(new ObservableRequest.OnRequested<Boolean>() {
             @Override
@@ -64,4 +69,14 @@ public void onRequest(Subscriber<? super Boolean> subscriber) {
             }
         });
     }
+
+    public static ObservableRequest<Boolean> hasSeenOnboarding() {
+        return new ObservableRequest<>(new ObservableRequest.OnRequested<Boolean>() {
+            @Override
+            public void onRequest(Subscriber<? super Boolean> subscriber) {
+                subscriber.onNext(Prefs.getBoolean(PREFS_ONBOARDING, false));
+                subscriber.onCompleted();
+            }
+        });
+    }
 }

app/src/main/java/ro/code4/monitorizarevot/net/model/OnboardingItem.java

@@ -0,0 +1,31 @@
+package ro.code4.monitorizarevot.net.model;
+
+public class OnboardingItem {
+    private Integer id;
+    private String title;
+    private String description;
+    private int imageResource;
+
+    public OnboardingItem(Integer id, String title, String description, int imageResource) {
+        this.id = id;
+        this.title = title;
+        this.description = description;
+        this.imageResource = imageResource;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public int getImageResource() {
+        return imageResource;
+    }
+}

app/src/main/java/ro/code4/monitorizarevot/viewmodel/OnboardingViewModel.java

@@ -0,0 +1,16 @@
+package ro.code4.monitorizarevot.viewmodel;
+
+import javax.inject.Inject;
+
+import ro.code4.monitorizarevot.domain.usecase.UseCaseFactory;
+import ro.code4.monitorizarevot.presentation.LoadingMessageFactory;
+import ro.code4.monitorizarevot.presentation.MessageFactory;
+
+public class OnboardingViewModel extends BaseViewModel {
+
+    @Inject
+    public OnboardingViewModel(UseCaseFactory useCaseFactory, LoadingMessageFactory loadingMessageFactory,
+                          MessageFactory messageFactory) {
+        super(useCaseFactory, loadingMessageFactory, messageFactory);
+    }
+}

app/src/main/res/layout/activity_onboarding.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:background="@drawable/ic_login_bkg">
+
+    <android.support.v4.view.ViewPager
+        android:id="@+id/onboarding_viewpager"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        />
+
+    <Button
+        android:id="@+id/btn_previous"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:background="@android:color/transparent"
+        android:text="@string/onboarding_previous"
+        android:textColor="@color/textPrimary"
+        android:layout_margin="@dimen/activity_horizontal_margin"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        android:visibility="invisible"
+        />
+
+    <Button
+        android:id="@+id/btn_next"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:background="@android:color/transparent"
+        android:text="@string/onboarding_next"
+        android:textColor="@color/textPrimary"
+        android:layout_margin="@dimen/activity_horizontal_margin"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        />
+
+</android.support.constraint.ConstraintLayout>