Added qrcode library. Added qr code imageview to account details

Habitica/build.gradle

@@ -81,6 +81,9 @@ dependencies {
     // Image Loading/Caching
     compile 'com.squareup.picasso:picasso:2.5.2'
 
+    //QR Code
+    compile 'com.github.kenglxn.QRGen:android:2.2.0'
+
     // Emojis
     compile 'com.github.viirus:emoji-lib:0.0.3.2'
 
@@ -161,11 +164,6 @@ android {
         release
     }
 
-    dexOptions{
-        javaMaxHeapSize "4g"
-        preDexLibraries = false
-    }
-
     buildTypes {
         debug {
             applicationIdSuffix ".debug"
@@ -206,8 +204,8 @@ android {
     }
     
     dexOptions {
-        preDexLibraries true
-        javaMaxHeapSize "2g" // Use gig increments depending on needs
+        preDexLibraries false
+        javaMaxHeapSize "4g" // Use gig increments depending on needs
         incremental true
     }
 

Habitica/res/layout/activity_prefs.xml

@@ -11,12 +11,6 @@
         android:layout_height="match_parent"
         tools:context=".ui.activities.MainActivity">
 
-        <FrameLayout
-            android:id="@+id/fragment_container"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
-
         <android.support.design.widget.AppBarLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content">
@@ -33,4 +27,20 @@
         </android.support.design.widget.AppBarLayout>
 
     </android.support.design.widget.CoordinatorLayout>
+
+    <FrameLayout
+        android:id="@+id/fragment_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior"
+        android:layout_gravity="center" >
+
+    </FrameLayout>
+
+    <ImageView
+        android:layout_width="match_parent"
+        android:layout_height="200dp"
+        android:id="@+id/imageView"
+        android:layout_gravity="center_horizontal|bottom" />
+
 </FrameLayout>

Habitica/src/main/java/com/habitrpg/android/habitica/ui/activities/PrefsActivity.java

@@ -15,6 +15,8 @@ import android.preference.PreferenceManager;
 import android.support.v7.preference.PreferenceFragmentCompat;
 import android.support.v7.preference.PreferenceScreen;
 import android.support.v7.widget.Toolbar;
+import android.view.View;
+import android.widget.ImageView;
 
 import butterknife.BindView;
 
@@ -24,6 +26,9 @@ public class PrefsActivity extends BaseActivity implements
     @BindView(R.id.toolbar)
     Toolbar toolbar;
 
+    @BindView(R.id.imageView)
+    ImageView qrImageView;
+
     // TODO:
     // This method should be moved to HabiticaApplication
     public static HostConfig fromContext(Context ctx) {
@@ -51,6 +56,8 @@ public class PrefsActivity extends BaseActivity implements
         getSupportFragmentManager().beginTransaction()
                 .add(R.id.fragment_container, new PreferencesFragment())
                 .commit();
+
+        qrImageView.setVisibility(View.VISIBLE);
     }
 
     @Override

Habitica/src/main/java/com/habitrpg/android/habitica/ui/fragments/preferences/AccountDetailsFragment.java

@@ -5,9 +5,15 @@ import com.habitrpg.android.habitica.R;
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
+import android.graphics.Bitmap;
 import android.support.v7.preference.Preference;
+import android.util.Log;
+import android.view.View;
+import android.widget.ImageView;
 import android.widget.Toast;
 
+import net.glxn.qrgen.android.QRCode;
+
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
@@ -22,6 +28,15 @@ public class AccountDetailsFragment extends BasePreferencesFragment {
                 findPreference(key).setSummary(preference.getValue().toString());
             }
         }
+
+        displayQRCode();
+    }
+
+    protected void displayQRCode() {
+        Bitmap myBitmap = QRCode.from("www.example.org").bitmap();
+        ImageView myImage = (ImageView) getActivity().findViewById(R.id.imageView);
+        myImage.setVisibility(View.VISIBLE);
+        myImage.setImageBitmap(myBitmap);
     }
 
     protected List<String> getAccountDetailsPreferences() {