Rename "Visual Studio" to "Visual_Studio"

Rename "External Repositories" to "External_Repositories".

17 files changed, 896 insertions, 0 deletions

diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/binding_adapters/BindingAdapters.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/binding_adapters/BindingAdapters.java
new file mode 100644
index 000000000..04d1ea5e7
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/binding_adapters/BindingAdapters.java
@@ -0,0 +1,34 @@
+package com.twine.tango.sharedui.binding_adapters;
+
+import android.databinding.BindingAdapter;
+import android.graphics.Bitmap;
+import android.widget.ImageView;
+import android.widget.ListView;
+
+/**
+ * Created by Roy on 11/7/2017.
+ */
+
+public class BindingAdapters {
+
+    @BindingAdapter("android:memory_bitmap")
+    public static void bitmapAdapter(ImageView view, Bitmap bitmap) {
+        if (bitmap != null) {
+            view.setImageBitmap(bitmap);
+        }
+    }
+
+    @BindingAdapter("android:onItemClick")
+    public static void listViewClickAdapter(ListView view, ListView.OnItemClickListener listener) {
+        if (view != null && listener != null) {
+            view.setOnItemClickListener(listener);
+        }
+    }
+
+    @BindingAdapter("android:selectedItemPosition")
+    public static void listViewSelectedItemPosition(ListView view, int position) {
+        if (view != null) {
+            view.setItemChecked(position, true);
+        }
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityBase.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityBase.java
new file mode 100644
index 000000000..7f52ffae6
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityBase.java
@@ -0,0 +1,121 @@
+package com.twine.tango.sharedui.containers;
+
+import android.content.Intent;
+import android.databinding.DataBindingUtil;
+import android.databinding.ViewDataBinding;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import com.mobsandgeeks.saripaar.ValidationError;
+import com.mobsandgeeks.saripaar.Validator;
+import com.twine.tango.sharedui.mvvm.ViewContract;
+import com.twine.tango.sharedui.mvvm.ViewModelBase;
+
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.concurrent.Callable;
+
+import javax.inject.Inject;
+
+import butterknife.ButterKnife;
+import io.reactivex.functions.Consumer;
+
+public abstract class ActivityBase<BindingView extends ViewDataBinding, VM extends ViewModelBase> extends AppCompatActivity implements ViewContract, Validator.ValidationListener {
+
+    protected static final String ACTIVITY_CALLBACK_INTENT = "ACTIVITY_CALLBACK_INTENT";
+
+    private Consumer<Boolean> lastValidationConsumer;
+    private Validator validator;
+
+    @Inject
+    public VM vm;
+
+    public BindingView binding;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        inject();
+        binding = DataBindingUtil.setContentView(this, getLayoutId());
+        try {
+
+            Method method = binding.getClass().getDeclaredMethod("setVm", vm.getClass());
+            method.invoke(binding, vm);
+
+            attachView();
+
+            ButterKnife.bind(this, binding.getRoot());
+
+            validator = new Validator(this);
+            validator.setValidationListener(this);
+
+            String key = getIntent().getStringExtra(ACTIVITY_CALLBACK_INTENT);
+            if (key != null && !key.isEmpty()) {
+                ActivityCallbackEngine.getInstance().runAndRemove(key);
+            }
+
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void attachView() {
+        vm.attachView(this);
+    }
+
+    @Override
+    public void validateFields(Consumer<Boolean> consumer) {
+        lastValidationConsumer = consumer;
+        validator.validate();
+    }
+
+    @Override
+    public void onValidationSucceeded() {
+        try {
+            lastValidationConsumer.accept(true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void onValidationFailed(List<ValidationError> errors) {
+        for (ValidationError error : errors) {
+            View view = error.getView();
+            String message = error.getCollatedErrorMessage(this);
+
+            if (view instanceof EditText) {
+                view.requestFocus();
+                ((EditText) view).setError(message);
+            } else {
+                Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
+            }
+        }
+
+        if (lastValidationConsumer != null) {
+            try {
+                lastValidationConsumer.accept(false);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    protected abstract int getLayoutId();
+
+    protected abstract void inject();
+
+    public void startActivityNotify(Class<?> activity, Runnable callback) {
+
+        String key = ActivityCallbackEngine.getInstance().putCallback(callback);
+        Intent i = new Intent(getApplicationContext(), activity);
+        i.putExtra(ACTIVITY_CALLBACK_INTENT, key);
+        startActivity(i);
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityCallbackEngine.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityCallbackEngine.java
new file mode 100644
index 000000000..5aec7852a
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/ActivityCallbackEngine.java
@@ -0,0 +1,55 @@
+package com.twine.tango.sharedui.containers;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * Created by Roy on 11/7/2017.
+ */
+
+public class ActivityCallbackEngine {
+
+    private static ActivityCallbackEngine instance;
+
+    private Map<String, Runnable> callbacks;
+
+    private ActivityCallbackEngine() {
+        callbacks = new HashMap<>();
+    }
+
+    public static ActivityCallbackEngine getInstance() {
+        if (instance == null) {
+            instance = new ActivityCallbackEngine();
+        }
+
+        return instance;
+    }
+
+    public void putCallback(String key, Runnable callback) {
+        callbacks.put(key,callback);
+    }
+
+    public String putCallback(Runnable callback) {
+
+        String key = UUID.randomUUID().toString();
+        callbacks.put(key,callback);
+        return key;
+    }
+
+    public void removeCallback(String key)
+    {
+        callbacks.remove(key);
+    }
+
+    public void run(String key)
+    {
+        callbacks.get(key).run();
+    }
+
+    public void runAndRemove(String key)
+    {
+        callbacks.get(key).run();
+        removeCallback(key);
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBase.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBase.java
new file mode 100644
index 000000000..19d472e24
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBase.java
@@ -0,0 +1,111 @@
+package com.twine.tango.sharedui.containers;
+
+import android.app.Fragment;
+import android.databinding.DataBindingUtil;
+import android.databinding.ViewDataBinding;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.Toast;
+
+import com.mobsandgeeks.saripaar.ValidationError;
+import com.mobsandgeeks.saripaar.Validator;
+import com.twine.tango.sharedui.mvvm.ViewContract;
+import com.twine.tango.sharedui.mvvm.ViewModelBase;
+
+import java.lang.reflect.Method;
+import java.util.List;
+
+import javax.inject.Inject;
+
+import butterknife.ButterKnife;
+import io.reactivex.functions.Consumer;
+
+public abstract class FragmentBase<BindingView extends ViewDataBinding, VM extends ViewModelBase> extends Fragment implements ViewContract, Validator.ValidationListener {
+
+    private Consumer<Boolean> lastValidationConsumer;
+    private Validator validator;
+
+    @Inject
+    VM vm;
+
+    BindingView binding;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+
+        inject();
+        binding = DataBindingUtil.inflate(inflater,getLayoutId(),container,false);
+
+        try {
+
+            Method method = binding.getClass().getDeclaredMethod("setVm", vm.getClass());
+            method.invoke(binding, vm);
+
+            attachView();
+
+            ButterKnife.bind(this, binding.getRoot());
+
+            validator = new Validator(this);
+            validator.setValidationListener(this);
+
+            return binding.getRoot();
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void attachView() {
+        vm.attachView(this);
+    }
+
+    @Override
+    public void validateFields(Consumer<Boolean> consumer) {
+        lastValidationConsumer = consumer;
+        validator.validate();
+    }
+
+    @Override
+    public void onValidationSucceeded() {
+        try {
+            lastValidationConsumer.accept(true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void onValidationFailed(List<ValidationError> errors) {
+        for (ValidationError error : errors) {
+            View view = error.getView();
+            String message = error.getCollatedErrorMessage(this.getActivity().getBaseContext());
+
+            if (view instanceof EditText) {
+                view.requestFocus();
+                ((EditText) view).setError(message);
+            } else {
+                Toast.makeText(this.getActivity().getBaseContext(), message, Toast.LENGTH_SHORT).show();
+            }
+        }
+
+        if (lastValidationConsumer != null) {
+            try {
+                lastValidationConsumer.accept(false);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    protected abstract int getLayoutId();
+
+    protected abstract void inject();
+
+    public abstract String getTitle();
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBaseV4.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBaseV4.java
new file mode 100644
index 000000000..7f56dd49e
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/containers/FragmentBaseV4.java
@@ -0,0 +1,107 @@
+package com.twine.tango.sharedui.containers;
+
+import android.support.v4.app.Fragment;
+import android.databinding.DataBindingUtil;
+import android.databinding.ViewDataBinding;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.Toast;
+import com.mobsandgeeks.saripaar.ValidationError;
+import com.mobsandgeeks.saripaar.Validator;
+import com.twine.tango.sharedui.mvvm.ViewContract;
+import com.twine.tango.sharedui.mvvm.ViewModelBase;
+import java.lang.reflect.Method;
+import java.util.List;
+import javax.inject.Inject;
+import butterknife.ButterKnife;
+import io.reactivex.functions.Consumer;
+
+public abstract class FragmentBaseV4<BindingView extends ViewDataBinding, VM extends ViewModelBase> extends Fragment implements ViewContract, Validator.ValidationListener {
+
+    private Consumer<Boolean> lastValidationConsumer;
+    private Validator validator;
+
+    @Inject
+    VM vm;
+
+    BindingView binding;
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+
+        inject();
+        binding = DataBindingUtil.inflate(inflater,getLayoutId(),container,false);
+
+        try {
+
+            Method method = binding.getClass().getDeclaredMethod("setVm", vm.getClass());
+            method.invoke(binding, vm);
+
+            attachView();
+
+            ButterKnife.bind(this, binding.getRoot());
+
+            validator = new Validator(this);
+            validator.setValidationListener(this);
+
+            return binding.getRoot();
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public void attachView() {
+        vm.attachView(this);
+    }
+
+    @Override
+    public void validateFields(Consumer<Boolean> consumer) {
+        lastValidationConsumer = consumer;
+        validator.validate();
+    }
+
+    @Override
+    public void onValidationSucceeded() {
+        try {
+            lastValidationConsumer.accept(true);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void onValidationFailed(List<ValidationError> errors) {
+        for (ValidationError error : errors) {
+            View view = error.getView();
+            String message = error.getCollatedErrorMessage(this.getContext());
+
+            if (view instanceof EditText) {
+                view.requestFocus();
+                ((EditText) view).setError(message);
+            } else {
+                Toast.makeText(this.getContext(), message, Toast.LENGTH_SHORT).show();
+            }
+        }
+
+        if (lastValidationConsumer != null) {
+            try {
+                lastValidationConsumer.accept(false);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    protected abstract int getLayoutId();
+
+    protected abstract void inject();
+
+    public abstract String getTitle();
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/BindingConverters.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/BindingConverters.java
new file mode 100644
index 000000000..130890c07
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/BindingConverters.java
@@ -0,0 +1,19 @@
+package com.twine.tango.sharedui.mvvm;
+
+import android.app.Application;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+
+import java.util.Calendar;
+
+/**
+ * Created by Roy on 7/27/2017.
+ */
+
+public class BindingConverters {
+
+    public static String convertDateToYear(Calendar calendar) {
+        return String.valueOf(calendar.get(Calendar.YEAR));
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/DependencyProperty.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/DependencyProperty.java
new file mode 100644
index 000000000..b39be3dc3
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/DependencyProperty.java
@@ -0,0 +1,49 @@
+package com.twine.tango.sharedui.mvvm;
+
+import android.databinding.ObservableField;
+
+/**
+ * Created by Roy on 7/27/2017.
+ */
+
+public class DependencyProperty<T> extends ObservableField<T> {
+
+    public interface OnPropertyChangedCallback<T> {
+        void onPropertyChanged(DependencyProperty<T> dp, T value);
+    }
+
+    private OnPropertyChangedCallback<T> callback;
+
+    public DependencyProperty(OnPropertyChangedCallback<T> callback) {
+        this.callback = callback;
+        init();
+    }
+
+    public DependencyProperty(T defaultValue, OnPropertyChangedCallback<T> callback) {
+        this.set(defaultValue);
+        this.callback = callback;
+        init();
+    }
+
+    public DependencyProperty(T defaultValue) {
+        this.set(defaultValue);
+        init();
+    }
+
+    public DependencyProperty() {
+        init();
+    }
+
+    private void init() {
+        final DependencyProperty<T> that = this;
+
+        this.addOnPropertyChangedCallback(new android.databinding.Observable.OnPropertyChangedCallback() {
+            @Override
+            public void onPropertyChanged(android.databinding.Observable observable, int i) {
+                if (that.callback != null) {
+                    that.callback.onPropertyChanged(that, that.get());
+                }
+            }
+        });
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/FieldUtils.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/FieldUtils.java
new file mode 100644
index 000000000..94f99359a
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/FieldUtils.java
@@ -0,0 +1,68 @@
+package com.twine.tango.sharedui.mvvm;/*
+ * Copyright 2016 Manas Chaudhari
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.databinding.Observable.OnPropertyChangedCallback;
+import android.databinding.ObservableField;
+import android.support.annotation.NonNull;
+
+import io.reactivex.Observable;
+import io.reactivex.ObservableEmitter;
+import io.reactivex.ObservableOnSubscribe;
+import io.reactivex.functions.Cancellable;
+
+
+public class FieldUtils {
+    /**
+     * Converts an ObservableField to an Observable. Note that setting null value inside
+     * ObservableField (except for initial value) throws a NullPointerException.
+     * @return Observable that contains the latest value in the ObservableField
+     */
+    @NonNull
+    public static <T> Observable<T> toObservable(@NonNull final ObservableField<T> field) {
+
+        return Observable.create(new ObservableOnSubscribe<T>() {
+            @Override
+            public void subscribe(final ObservableEmitter<T> e) throws Exception {
+                T initialValue = field.get();
+                if (initialValue != null) {
+                    e.onNext(initialValue);
+                }
+                final OnPropertyChangedCallback callback = new OnPropertyChangedCallback() {
+                    @Override
+                    public void onPropertyChanged(android.databinding.Observable observable, int i) {
+                        e.onNext(field.get());
+                    }
+                };
+                field.addOnPropertyChangedCallback(callback);
+                e.setCancellable(new Cancellable() {
+                    @Override
+                    public void cancel() throws Exception {
+                        field.removeOnPropertyChangedCallback(callback);
+                    }
+                });
+            }
+        });
+    }
+
+    /**
+     * A convenient wrapper for {@code ReadOnlyField#create(Observable)}
+     * @return DataBinding field created from the specified Observable
+     */
+    @NonNull
+    public static <T> ReadOnlyField<T> toField(@NonNull final Observable<T> observable) {
+        return ReadOnlyField.create(observable);
+    }
+}
\ No newline at end of file
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ReadOnlyField.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ReadOnlyField.java
new file mode 100644
index 000000000..cf6f8abd8
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ReadOnlyField.java
@@ -0,0 +1,74 @@
+package com.twine.tango.sharedui.mvvm;/*
+ * Copyright 2016 Manas Chaudhari
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import android.databinding.ObservableField;
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import java.util.HashMap;
+
+import io.reactivex.Observable;
+import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.Consumer;
+
+
+public class ReadOnlyField<T> extends ObservableField<T> {
+    private final Observable<T> source;
+    private final HashMap<OnPropertyChangedCallback, Disposable> subscriptions = new HashMap<>();
+
+    public static <U> ReadOnlyField<U> create(@NonNull Observable<U> source) {
+        return new ReadOnlyField<>(source);
+    }
+
+    private ReadOnlyField(@NonNull Observable<T> source) {
+        super();
+        this.source = source.doOnNext(new Consumer<T>() {
+            @Override
+            public void accept(T t) throws Exception {
+                ReadOnlyField.super.set(t);
+            }
+        }).doOnError(new Consumer<Throwable>() {
+            @Override
+            public void accept(Throwable throwable) throws Exception {
+                Log.e("Twine", "onError in source observable", throwable);
+            }
+        }).onErrorResumeNext(Observable.<T>empty()).share();
+    }
+
+    /**
+     * @deprecated Setter of com.sirilix.mvvm.ReadOnlyField does nothing. Merge with the source Observable instead.
+     * See <a href="https://github.com/manas-chaudhari/android-mvvm/tree/master/Documentation/ObservablesAndSetters.md">Documentation/ObservablesAndSetters.md</a>
+     */
+    @Deprecated
+    @Override
+    public void set(T value) {
+    }
+
+    @Override
+    public synchronized void addOnPropertyChangedCallback(OnPropertyChangedCallback callback) {
+        super.addOnPropertyChangedCallback(callback);
+        subscriptions.put(callback, source.subscribe());
+    }
+
+    @Override
+    public synchronized void removeOnPropertyChangedCallback(OnPropertyChangedCallback callback) {
+        super.removeOnPropertyChangedCallback(callback);
+        Disposable subscription = subscriptions.remove(callback);
+        if (subscription != null && !subscription.isDisposed()) {
+            subscription.dispose();
+        }
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/RelayCommand.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/RelayCommand.java
new file mode 100644
index 000000000..586ef9ef6
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/RelayCommand.java
@@ -0,0 +1,68 @@
+package com.twine.tango.sharedui.mvvm;
+
+import android.databinding.BindingAdapter;
+import android.view.View;
+
+/**
+ * Created by Roy on 7/27/2017.
+ */
+
+public class RelayCommand {
+
+    public interface OnCommandExecute
+    {
+        void execute();
+    }
+
+    public interface CommandCanExecute
+    {
+        boolean canExecute();
+    }
+
+    public OnCommandExecute onCommandExecute;
+
+    public CommandCanExecute commandCanExecute;
+
+    private View bindedView;
+
+    @BindingAdapter("android:command")
+    public static void CommandBinding(View view, RelayCommand command)
+    {
+        command.bindedView = view;
+
+        view.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                command.execute();
+            }
+        });
+
+        command.invalidateCommand();
+    }
+
+    public RelayCommand(OnCommandExecute onCommandExecute) {
+        this.onCommandExecute = onCommandExecute;
+    }
+
+    public RelayCommand(OnCommandExecute onCommandExecute, CommandCanExecute commandCanExecute) {
+        this.onCommandExecute = onCommandExecute;
+        this.commandCanExecute = commandCanExecute;
+    }
+
+    public RelayCommand() {
+
+    }
+
+    public void execute()
+    {
+        onCommandExecute.execute();
+    }
+
+    public void invalidateCommand()
+    {
+        if (commandCanExecute != null)
+        {
+            bindedView.setEnabled(commandCanExecute.canExecute());
+        }
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewContract.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewContract.java
new file mode 100644
index 000000000..89427070b
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewContract.java
@@ -0,0 +1,8 @@
+package com.twine.tango.sharedui.mvvm;
+
+import io.reactivex.functions.Consumer;
+
+public interface ViewContract {
+    void attachView();
+    void validateFields(Consumer<Boolean> consumer);
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewModelBase.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewModelBase.java
new file mode 100644
index 000000000..4e66d88e9
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/mvvm/ViewModelBase.java
@@ -0,0 +1,21 @@
+package com.twine.tango.sharedui.mvvm;
+
+import android.util.Log;
+
+/**
+ * Created by Roy on 7/26/2017.
+ */
+
+public abstract class ViewModelBase<T extends ViewContract> {
+
+    public T view; //TODO: Maybe use WeakReference<T> to not prevent garbage collector from disposing the activity ?
+
+    public void attachView(T view) {
+        this.view = view;
+        onViewAttached(view);
+    }
+
+    protected void onViewAttached(T view) {
+        Log.i("MVVM",view.getClass().getSimpleName() + " attached to " + this.getClass().getSimpleName());
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/AndroidNotificationProvider.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/AndroidNotificationProvider.java
new file mode 100644
index 000000000..7fd2cfacd
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/AndroidNotificationProvider.java
@@ -0,0 +1,22 @@
+package com.twine.tango.sharedui.notifications;
+
+import android.content.Context;
+import android.widget.Toast;
+
+/**
+ * Created by Roy on 7/29/2017.
+ */
+
+public class AndroidNotificationProvider implements NotificationProvider {
+
+    private Context context;
+
+    public AndroidNotificationProvider(Context context) {
+        this.context = context;
+    }
+
+    @Override
+    public void notify(String message) {
+        Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/NotificationProvider.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/NotificationProvider.java
new file mode 100644
index 000000000..87fe8359d
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/notifications/NotificationProvider.java
@@ -0,0 +1,11 @@
+package com.twine.tango.sharedui.notifications;
+
+/**
+ * Created by Roy on 7/29/2017.
+ */
+
+public interface NotificationProvider {
+
+    void notify(String message);
+
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerAdapter.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerAdapter.java
new file mode 100644
index 000000000..2e151cc01
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerAdapter.java
@@ -0,0 +1,61 @@
+package com.twine.tango.sharedui.paging;
+
+import android.support.v4.app.Fragment;
+import android.support.v4.app.FragmentManager;
+import android.support.v4.app.FragmentPagerAdapter;
+
+import com.twine.tango.sharedui.containers.FragmentBaseV4;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by Roy on 7/24/2017.
+ */
+
+public class PagerAdapter extends FragmentPagerAdapter {
+
+    private List<FragmentBaseV4> fragments;
+    private int currentPosition;
+
+    public PagerAdapter(FragmentManager fm) {
+        super(fm);
+
+        fragments = new ArrayList<>();
+    }
+
+    public void addFragment(FragmentBaseV4 fragment)
+    {
+        fragments.add(fragment);
+    }
+
+    public void removeFragment(FragmentBaseV4 fragment)
+    {
+        fragments.remove(fragment);
+    }
+
+    @Override
+    public Fragment getItem(int position) {
+        currentPosition = position;
+        return fragments.get(position);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T getCurrentFragment() {
+        return (T) getItem(currentPosition);
+    }
+
+    @Override
+    public int getCount() {
+        return fragments.size();
+    }
+
+    @Override
+    public CharSequence getPageTitle(int position) {
+        if (fragments.get(position) != null) {
+            return fragments.get(position).getTitle();
+        } else {
+            return "";
+        }
+    }
+}
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerZoomTransform.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerZoomTransform.java
new file mode 100644
index 000000000..9c114c01c
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/paging/PagerZoomTransform.java
@@ -0,0 +1,44 @@
+package com.twine.tango.sharedui.paging;
+
+import android.support.v4.view.ViewPager;
+import android.view.View;
+
+public class PagerZoomTransform implements ViewPager.PageTransformer {
+    private static final float MIN_SCALE = 0.85f;
+    private static final float MIN_ALPHA = 0.5f;
+
+    public void transformPage(View view, float position) {
+        int pageWidth = view.getWidth();
+        int pageHeight = view.getHeight();
+
+        if (position < -1) { // [-Infinity,-1)
+            // This page is way off-screen to the left.
+            view.setAlpha(0);
+
+        } else if (position <= 1) { // [-1,1]
+            // Modify the default slide transition to shrink the page as well
+            float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
+            float vertMargin = pageHeight * (1 - scaleFactor) / 2;
+            float horzMargin = pageWidth * (1 - scaleFactor) / 2;
+            if (position < 0) {
+                view.setTranslationX(horzMargin - vertMargin / 2);
+            } else {
+                view.setTranslationX(-horzMargin + vertMargin / 2);
+            }
+
+            // Scale the page down (between MIN_SCALE and 1)
+            view.setScaleX(scaleFactor);
+            view.setScaleY(scaleFactor);
+
+            // Fade the page relative to its size.
+            view.setAlpha(MIN_ALPHA +
+                    (scaleFactor - MIN_SCALE) /
+                            (1 - MIN_SCALE) * (1 - MIN_ALPHA));
+
+        } else { // (1,+Infinity]
+            // This page is way off-screen to the right.
+            view.setAlpha(0);
+        }
+    }
+}
+
diff --git a/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/validation/ViewValidator.java b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/validation/ViewValidator.java
new file mode 100644
index 000000000..4c62b7548
--- /dev/null
+++ b/Software/Android_Studio/Tango.SharedUI/src/main/java/com/twine/tango/sharedui/validation/ViewValidator.java
@@ -0,0 +1,23 @@
+package com.twine.tango.sharedui.validation;
+
+import com.mobsandgeeks.saripaar.ValidationError;
+import com.mobsandgeeks.saripaar.Validator;
+
+import java.util.List;
+
+/**
+ * Created by Roy on 11/6/2017.
+ */
+
+public class ViewValidator implements Validator.ValidationListener {
+
+    @Override
+    public void onValidationSucceeded() {
+
+    }
+
+    @Override
+    public void onValidationFailed(List<ValidationError> errors) {
+
+    }
+}