- Cleaned unused imports in various Classes.

- Simplified BalancesFragment by removing a couple of unnecessary files and merging its funcionality into more compact classes/layouts

app/src/main/java/cy/agorise/crystalwallet/fragments/BalanceFragment.java

@@ -3,11 +3,11 @@ package cy.agorise.crystalwallet.fragments;
 import android.arch.lifecycle.LiveData;
 import android.arch.lifecycle.Observer;
 import android.arch.lifecycle.ViewModelProviders;
-import android.content.Context;
-import android.net.Uri;
 import android.os.Bundle;
-import android.support.design.widget.TabLayout;
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
+import android.support.v7.widget.LinearLayoutManager;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -19,22 +19,20 @@ import butterknife.BindView;
 import butterknife.ButterKnife;
 import cy.agorise.crystalwallet.R;
 import cy.agorise.crystalwallet.models.CryptoNetBalance;
-import cy.agorise.crystalwallet.viewmodels.CryptoCoinBalanceListViewModel;
 import cy.agorise.crystalwallet.viewmodels.CryptoNetBalanceListViewModel;
-import cy.agorise.crystalwallet.views.CryptoNetBalanceListView;
+import cy.agorise.crystalwallet.views.CryptoNetBalanceListAdapter;
 
 public class BalanceFragment extends Fragment {
+
     CryptoNetBalanceListViewModel cryptoNetBalanceListViewModel;
 
-    @BindView(R.id.vCryptoNetBalanceListView)
+    @BindView(R.id.tvNoBalances)
-    CryptoNetBalanceListView vCryptoNetBalanceListView;
+    TextView tvNoBalances;
-
-    @BindView(R.id.tvNobalances)
-    public TextView tvNobalances;
-
-
 
+    @BindView(R.id.rvBalances)
+    RecyclerView rvBalances;
 
+    CryptoNetBalanceListAdapter balancesAdapter;
 
     public BalanceFragment() {
         // Required empty public constructor
@@ -53,29 +51,32 @@ public class BalanceFragment extends Fragment {
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
         View view = inflater.inflate(R.layout.fragment_balance, container, false);
         ButterKnife.bind(this, view);
 
-        cryptoNetBalanceListViewModel = ViewModelProviders.of(this).get(CryptoNetBalanceListViewModel.class);
+        // Configure RecyclerView and its adapter
-        LiveData<List<CryptoNetBalance>> cryptoNetBalanceData = cryptoNetBalanceListViewModel.getCryptoNetBalanceList();
+        rvBalances.setLayoutManager(new LinearLayoutManager(getContext()));
-        vCryptoNetBalanceListView.setData(null, this);
+        balancesAdapter = new CryptoNetBalanceListAdapter(this);
+        rvBalances.setAdapter(balancesAdapter);
 
-        final Fragment fragment = this;
+        //Prevents the UI from an infinite scrolling of balances
+        rvBalances.setNestedScrollingEnabled(false);
+
+        cryptoNetBalanceListViewModel = ViewModelProviders.of(this).get(CryptoNetBalanceListViewModel.class);
+        final LiveData<List<CryptoNetBalance>> cryptoNetBalanceData = cryptoNetBalanceListViewModel.getCryptoNetBalanceList();
 
         cryptoNetBalanceData.observe(this, new Observer<List<CryptoNetBalance>>() {
             @Override
             public void onChanged(List<CryptoNetBalance> cryptoNetBalances) {
-                vCryptoNetBalanceListView.setData(cryptoNetBalances, fragment);
+                balancesAdapter.submitList(cryptoNetBalances);
 
-                final int size = cryptoNetBalances.size();
+                if(cryptoNetBalances != null && cryptoNetBalances.size() > 0) {
-                if(size==0){
+                    tvNoBalances.setVisibility(View.INVISIBLE);
-                    tvNobalances.setVisibility(View.VISIBLE);
+                } else {
-                }
+                    tvNoBalances.setVisibility(View.VISIBLE);
-                else{
-                    tvNobalances.setVisibility(View.INVISIBLE);
                 }
             }
         });

app/src/main/java/cy/agorise/crystalwallet/viewmodels/ContactListViewModel.java

@@ -9,7 +9,6 @@ import android.arch.paging.PagedList;
 import cy.agorise.crystalwallet.dao.CrystalDatabase;
 import cy.agorise.crystalwallet.enums.CryptoNet;
 import cy.agorise.crystalwallet.models.Contact;
-import cy.agorise.crystalwallet.models.CryptoCoinTransaction;
 
 /**
  * Created by Henry Varona on 1/17/2018.

app/src/main/java/cy/agorise/crystalwallet/views/CryptoNetBalanceListAdapter.java

@@ -1,6 +1,7 @@
 package cy.agorise.crystalwallet.views;
 
 
+import android.support.annotation.NonNull;
 import android.support.v4.app.Fragment;
 import android.support.v7.recyclerview.extensions.ListAdapter;
 import android.view.LayoutInflater;
@@ -22,22 +23,23 @@ public class CryptoNetBalanceListAdapter extends ListAdapter<CryptoNetBalance, C
     /*
      * A LifecycleOwner fragment that will be used to call the ViewModelProviders
      */
-    Fragment fragment;
+    private Fragment fragment;
 
     public CryptoNetBalanceListAdapter(Fragment fragment) {
         super(CryptoNetBalance.DIFF_CALLBACK);
         this.fragment = fragment;
     }
 
+    @NonNull
     @Override
-    public CryptoNetBalanceViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+    public CryptoNetBalanceViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
         View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.balance_list_item,parent,false);
 
         return new CryptoNetBalanceViewHolder(v, fragment);
     }
 
     @Override
-    public void onBindViewHolder(CryptoNetBalanceViewHolder holder, int position) {
+    public void onBindViewHolder(@NonNull CryptoNetBalanceViewHolder holder, int position) {
         CryptoNetBalance balance = getItem(position);
         if (balance != null) {
             holder.bindTo(balance);

app/src/main/java/cy/agorise/crystalwallet/views/CryptoNetBalanceListView.java

@@ -1,107 +0,0 @@
-package cy.agorise.crystalwallet.views;
-
-import android.content.Context;
-import android.support.v4.app.Fragment;
-import android.support.v7.widget.LinearLayoutManager;
-import android.support.v7.widget.RecyclerView;
-import android.util.AttributeSet;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.widget.RelativeLayout;
-
-import java.util.List;
-
-import cy.agorise.crystalwallet.R;
-import cy.agorise.crystalwallet.models.CryptoNetBalance;
-import cy.agorise.crystalwallet.viewmodels.CryptoCoinBalanceListViewModel;
-import cy.agorise.crystalwallet.viewmodels.CryptoNetBalanceListViewModel;
-
-/**
- * Created by Henry Varona on 10/9/2017.
- *
- * A view that show the list of crypto net balances of the user.
- * Each crypto net has its own list of crypto coin balances.
- *
- * With this view the user can see all of his/her account balances of
- * every crypto coin.
- */
-
-public class CryptoNetBalanceListView extends RelativeLayout {
-
-    LayoutInflater mInflater;
-
-    /*
-     * The root container of this view. Its a relative layout
-     */
-    View rootView;
-    /*
-     * The list view that holds every crypto net balance item
-     */
-    RecyclerView listView;
-    /*
-     * The adapter for the previous list view
-     */
-    CryptoNetBalanceListAdapter listAdapter;
-
-    /*
-     * One of three constructors needed to be inflated from a layout
-     */
-    public CryptoNetBalanceListView(Context context){
-        super(context);
-        this.mInflater = LayoutInflater.from(context);
-        init();
-    }
-
-    /*
-     * One of three constructors needed to be inflated from a layout
-     */
-    public CryptoNetBalanceListView(Context context, AttributeSet attrs) {
-        super(context, attrs);
-        this.mInflater = LayoutInflater.from(context);
-        init();
-    }
-
-    /*
-     * One of three constructors needed to be inflated from a layout
-     */
-    public CryptoNetBalanceListView(Context context, AttributeSet attrs, int defStyle){
-        super(context, attrs, defStyle);
-        this.mInflater = LayoutInflater.from(context);
-        init();
-    }
-
-    /**
-     * Initialize the list view holding the crypto net balances
-     */
-    public void init(){
-        //inflates the corresponding view
-        rootView = mInflater.inflate(R.layout.balance_list, this, true);
-        this.listView = rootView.findViewById(R.id.balanceListView);
-
-        final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this.getContext());
-        this.listView.setLayoutManager(linearLayoutManager);
-        //Prevents the UI from an infinite scrolling of balances
-        this.listView.setNestedScrollingEnabled(false);
-    }
-
-    /*main_content
-     * Sets the data for the list of balances.
-     *
-     * @param data the list of crypto net balances that will be show to the user
-     * @param fragment a LifecycleOwner fragment to allow the inners views to use the ViewModels
-     */
-    public void setData(List<CryptoNetBalance> data, Fragment fragment){
-        //initializes the list adapter
-        if (this.listAdapter == null) {
-            this.listAdapter = new CryptoNetBalanceListAdapter(fragment);
-            this.listView.setAdapter(this.listAdapter);
-        }
-
-        //sets the data of the list adapter
-        if (data != null) {
-            this.listAdapter.submitList(data);
-        }
-    }
-
-
-}

app/src/main/java/cy/agorise/crystalwallet/views/CryptoNetBalanceViewHolder.java

@@ -1,15 +1,12 @@
 package cy.agorise.crystalwallet.views;
 
-import android.app.Activity;
 import android.content.Context;
-import android.content.Intent;
 import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
 import android.arch.lifecycle.LifecycleOwner;
 import android.arch.lifecycle.LiveData;
 import android.arch.lifecycle.Observer;
 import android.arch.lifecycle.ViewModelProviders;
-import android.arch.paging.PagedList;
 import android.support.v4.app.FragmentTransaction;
 import android.support.v7.widget.RecyclerView;
 import android.view.View;
@@ -21,16 +18,11 @@ import java.util.HashMap;
 import java.util.List;
 
 import butterknife.BindView;
-import butterknife.ButterKnife;
-import butterknife.OnClick;
 import cy.agorise.crystalwallet.R;
-import cy.agorise.crystalwallet.activities.SendTransactionActivity;
 import cy.agorise.crystalwallet.dao.CrystalDatabase;
 import cy.agorise.crystalwallet.fragments.ReceiveTransactionFragment;
 import cy.agorise.crystalwallet.fragments.SendTransactionFragment;
 import cy.agorise.crystalwallet.models.CryptoCoinBalance;
-import cy.agorise.crystalwallet.models.CryptoCoinTransaction;
-import cy.agorise.crystalwallet.models.CryptoCurrencyEquivalence;
 import cy.agorise.crystalwallet.models.CryptoNetBalance;
 import cy.agorise.crystalwallet.models.GeneralSetting;
 import cy.agorise.crystalwallet.viewmodels.CryptoCoinBalanceListViewModel;
@@ -45,7 +37,7 @@ public class CryptoNetBalanceViewHolder extends RecyclerView.ViewHolder {
     /*
      * the view holding the icon of the crypto net
      */
-    ImageView cryptoNetIcon;
+    private ImageView cryptoNetIcon;
 
     /*
      * the view holding the name of the crypto net
@@ -97,12 +89,12 @@ public class CryptoNetBalanceViewHolder extends RecyclerView.ViewHolder {
         this.cryptoNetAccountId = -1;
 
         //TODO: use ButterKnife to load the views
-        cryptoNetIcon = (ImageView) itemView.findViewById(R.id.ivCryptoNetIcon);
+        cryptoNetIcon = itemView.findViewById(R.id.ivCryptoNetIcon);
-        cryptoNetName = (TextView) itemView.findViewById(R.id.tvCryptoNetName);
+        cryptoNetName = itemView.findViewById(R.id.tvCryptoNetName);
-        cryptoNetEquivalentTotal = (TextView) itemView.findViewById(R.id.tvCryptoNetEquivalentTotal);
+        cryptoNetEquivalentTotal = itemView.findViewById(R.id.tvCryptoNetEquivalentTotal);
-        cryptoCoinBalanceListView = (CryptoCoinBalanceListView) itemView.findViewById(R.id.cryptoCoinBalancesListView);
+        cryptoCoinBalanceListView = itemView.findViewById(R.id.cryptoCoinBalancesListView);
-        btnSendFromThisAccount = (Button) itemView.findViewById(R.id.btnSendFromThisAccount);
+        btnSendFromThisAccount = itemView.findViewById(R.id.btnSendFromThisAccount);
-        btnReceiveToThisAccount = (Button) itemView.findViewById(R.id.btnReceiveWithThisAccount);
+        btnReceiveToThisAccount = itemView.findViewById(R.id.btnReceiveWithThisAccount);
 
         //Setting the send button
         btnSendFromThisAccount.setOnClickListener(new View.OnClickListener() {
@@ -211,9 +203,9 @@ public class CryptoNetBalanceViewHolder extends RecyclerView.ViewHolder {
             this.cryptoNetAccountId = balance.getAccountId();
 
             /*
-            * The first letter should be in mayus
+            * The first letter should be in Uppercase
             * */
-            final String crypto = balance.getCryptoNet().getLabel().toString().toLowerCase();
+            final String crypto = balance.getCryptoNet().getLabel().toLowerCase();
             final String upperString = crypto.substring(0,1).toUpperCase() + crypto.substring(1);
 
             cryptoNetName.setText(upperString);
@@ -225,7 +217,7 @@ public class CryptoNetBalanceViewHolder extends RecyclerView.ViewHolder {
 
             cryptoCoinBalanceListView.setData(null, this);
 
-            //Observes the livedata, so any of its changes on the database will be reloaded here
+            //Observes the LiveData, so any of its changes on the database will be reloaded here
             cryptoCoinBalanceData.observe((LifecycleOwner)this.itemView.getContext(), new Observer<List<CryptoCoinBalance>>() {
                 @Override
                 public void onChanged(List<CryptoCoinBalance> cryptoCoinBalances) {

app/src/main/java/cy/agorise/crystalwallet/views/TransactionListAdapter.java

@@ -1,24 +1,13 @@
 package cy.agorise.crystalwallet.views;
 
-
-import android.arch.lifecycle.LiveData;
 import android.arch.paging.PagedListAdapter;
-import android.content.Context;
 import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import android.support.v4.app.Fragment;
-import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ArrayAdapter;
-import android.widget.ListAdapter;
-import android.widget.TextView;
-
-import java.util.List;
 
 import cy.agorise.crystalwallet.R;
-import cy.agorise.crystalwallet.models.CryptoCoinTransaction;
 import cy.agorise.crystalwallet.models.CryptoCoinTransactionExtended;
 
 /**
@@ -39,8 +28,9 @@ public class TransactionListAdapter extends PagedListAdapter<CryptoCoinTransacti
         this.fragment = fragment;
     }
 
+    @NonNull
     @Override
-    public TransactionViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+    public TransactionViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
         View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.transaction_list_item,parent,false);
 
 
@@ -48,7 +38,7 @@ public class TransactionListAdapter extends PagedListAdapter<CryptoCoinTransacti
     }
 
     @Override
-    public void onBindViewHolder(TransactionViewHolder holder, int position) {
+    public void onBindViewHolder(@NonNull TransactionViewHolder holder, int position) {
         CryptoCoinTransactionExtended transaction = getItem(position);
         if (transaction != null) {
             holder.bindTo(transaction);

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

@@ -1,13 +0,0 @@
-<?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"
-    android:orientation="vertical"
-    android:layout_width="match_parent"
-    android:layout_height="wrap_content">
-
-    <android.support.v7.widget.RecyclerView
-        android:id="@+id/balanceListView"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        />
-</LinearLayout>

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

@@ -1,23 +1,25 @@
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="cy.agorise.crystalwallet.fragments.BalanceFragment">
 
     <TextView
-        android:id="@+id/tvNobalances"
+        android:id="@+id/tvNoBalances"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/You_dont_have_balances"
         android:textColor="@color/gray"
         android:layout_marginTop="190dp"
-        android:layout_marginLeft="90dp"
+        android:layout_marginStart="100dp"
-        android:textSize="15dp" />
+        android:textSize="15sp" />
 
-    <cy.agorise.crystalwallet.views.CryptoNetBalanceListView
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/rvBalances"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-
+        tools:listitem="@layout/balance_list_item"
-        android:id="@+id/vCryptoNetBalanceListView" />
+        tools:itemCount="1"/>
 
 </FrameLayout>

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

@@ -10,9 +10,9 @@
         android:layout_height="wrap_content"
         android:text="@string/You_dont_have_contacts"
         android:textColor="@color/gray"
+        android:textSize="15sp"
         android:layout_marginTop="190dp"
-        android:layout_marginStart="100dp"
+        android:layout_marginStart="100dp" />
-        android:textSize="15sp" />
 
     <android.support.v7.widget.RecyclerView
         android:id="@+id/rvContacts"