Added a brainkey derivation feature to the sample app

build.gradle

@@ -22,6 +22,6 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.3.1'
+        classpath 'com.android.tools.build:gradle:3.3.2'
     }
 }

sample/src/main/AndroidManifest.xml

@@ -14,10 +14,15 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
         tools:ignore="GoogleAppIndexingWarning">
+        <activity
+            android:name=".BrainkeyActivity"
+            android:label="@string/title_activity_brainkey"
+            android:theme="@style/AppTheme.NoActionBar"></activity>
         <activity android:name=".SubscriptionActivity" />
         <activity android:name=".CallsActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
+
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>

sample/src/main/java/cy/agorise/labs/sample/BrainkeyActivity.java

@@ -0,0 +1,60 @@
+package cy.agorise.labs.sample;
+
+import android.os.Bundle;
+import android.support.design.widget.TextInputEditText;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.text.Spannable;
+import android.text.SpannableStringBuilder;
+import android.text.style.StyleSpan;
+import android.view.View;
+import android.widget.TextView;
+
+import java.util.Locale;
+
+import butterknife.BindView;
+import butterknife.ButterKnife;
+import butterknife.OnClick;
+import cy.agorise.graphenej.BrainKey;
+
+public class BrainkeyActivity extends AppCompatActivity {
+    private final String TAG = this.getClass().getName();
+    @BindView(R.id.brainkey)
+    TextInputEditText mBrainkeyView;
+
+    @BindView(R.id.pubkey)
+    TextInputEditText mDesiredPubKey;
+
+    @BindView(R.id.pubkey_display)
+    TextView mPubkeyDisplay;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_brainkey);
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+        ButterKnife.bind(this);
+    }
+
+    @OnClick(R.id.button_generate)
+    public void onGenerateClicked(View v){
+        String target = mDesiredPubKey.getText().toString();
+        String brainkeyText = mBrainkeyView.getText().toString();
+        StringBuilder builder = new StringBuilder();
+        for(int i = 0; i < 10; i++){
+            BrainKey brainKey = new BrainKey(brainkeyText, i);
+            builder.append(String.format(Locale.ROOT, "%d -> ", i))
+                .append(brainKey.getPublicAddress("BTS").toString())
+                .append("\n");
+        }
+        String derivationResult = builder.toString();
+        mPubkeyDisplay.setText(derivationResult);
+        if(!target.isEmpty() && derivationResult.contains(target)){
+            int start = derivationResult.indexOf(target);
+            SpannableStringBuilder sBuilder = new SpannableStringBuilder(derivationResult);
+            sBuilder.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), start, (start + 53), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+            mPubkeyDisplay.setText(sBuilder);
+        }
+    }
+}

sample/src/main/java/cy/agorise/labs/sample/CallsActivity.java

@@ -26,6 +26,7 @@ public class CallsActivity extends AppCompatActivity {
     private final String TAG = this.getClass().getName();
 
     private static final String REMOVE_CURRENT_NODE = "remove_current_node";
+    private static final String TEST_BRAINKEY_DERIVATION = "test_brainkey_derivation";
 
     @BindView(R.id.call_list)
     RecyclerView mRecyclerView;
@@ -81,7 +82,8 @@ public class CallsActivity extends AppCompatActivity {
             RPC.CALL_GET_ACCOUNT_BALANCES,
             RPC.CALL_BROADCAST_TRANSACTION,
             RPC.CALL_GET_TRANSACTION,
-            REMOVE_CURRENT_NODE
+            REMOVE_CURRENT_NODE,
+            TEST_BRAINKEY_DERIVATION
         };
 
         @NonNull
@@ -104,6 +106,8 @@ public class CallsActivity extends AppCompatActivity {
                     intent = new Intent(CallsActivity.this, SubscriptionActivity.class);
                 } else if (selectedCall.equals(REMOVE_CURRENT_NODE)){
                     intent = new Intent(CallsActivity.this, RemoveNodeActivity.class);
+                } else if (selectedCall.equals(TEST_BRAINKEY_DERIVATION)){
+                    intent = new Intent(CallsActivity.this, BrainkeyActivity.class);
                 } else {
                     intent = new Intent(CallsActivity.this, PerformCallActivity.class);
                     intent.putExtra(Constants.KEY_SELECTED_CALL, selectedCall);

sample/src/main/res/layout/activity_brainkey.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout 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"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".BrainkeyActivity">
+
+    <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/AppTheme.AppBarOverlay">
+
+        <android.support.v7.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="?attr/colorPrimary"
+            app:popupTheme="@style/AppTheme.PopupOverlay" />
+
+    </android.support.design.widget.AppBarLayout>
+
+    <include layout="@layout/content_brainkey" />
+
+</android.support.design.widget.CoordinatorLayout>

sample/src/main/res/layout/content_brainkey.xml

@@ -0,0 +1,64 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout 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"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    app:layout_behavior="@string/appbar_scrolling_view_behavior"
+    tools:context=".BrainkeyActivity"
+    tools:showIn="@layout/activity_brainkey">
+    <android.support.design.widget.TextInputLayout
+        android:id="@+id/container_brainkey"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="32dp"
+        android:hint="@string/hint_brainkey"
+        app:layout_constraintBottom_toTopOf="@+id/container_pub_key"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+        <android.support.design.widget.TextInputEditText
+            android:id="@+id/brainkey"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:lines="4"/>
+    </android.support.design.widget.TextInputLayout>
+    <android.support.design.widget.TextInputLayout
+        android:id="@+id/container_pub_key"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="8dp"
+        android:layout_marginStart="8dp"
+        android:hint="@string/hint_pubkey"
+        app:layout_constraintBottom_toTopOf="@+id/pubkey_display"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.5"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/container_brainkey">
+        <android.support.design.widget.TextInputEditText
+            android:id="@+id/pubkey"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+    </android.support.design.widget.TextInputLayout>
+    <TextView
+        android:id="@+id/pubkey_display"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:textSize="10sp"
+        android:layout_margin="8dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/button_generate"
+        app:layout_constraintTop_toBottomOf="@id/container_pub_key"/>
+    <Button android:id="@+id/button_generate"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_margin="8dp"
+        android:text="@string/button_generate"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"/>
+</android.support.constraint.ConstraintLayout>

sample/src/main/res/values/dimens.xml

@@ -0,0 +1,3 @@
+<resources>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

sample/src/main/res/values/strings.xml

@@ -64,4 +64,10 @@
     <!-- GetAccountBalances -->
     <string name="get_account_balances_arg1">User account</string>
     <string name="get_account_balances_arg2">Comma-separated list of assets</string>
+    <string name="title_activity_brainkey">BrainkeyActivity</string>
+
+    <!-- BrainkeyActivity strings -->
+    <string name="hint_brainkey">Brainkey</string>
+    <string name="hint_pubkey">Desired public key / address</string>
+    <string name="button_generate">Generate public key</string>
 </resources>

sample/src/main/res/values/styles.xml

@@ -8,4 +8,13 @@
         <item name="colorAccent">@color/colorAccent</item>
     </style>
 
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
 </resources>