Integration of HighScoreContainer with DisplayHighScore.

* DisplayHighScore will print the string of the current high score
* HighScoreContainer returns current high score
* MainActivity passes high score as intent (through serialization)
* Score is serializable (again)
* Score can be written as a String

Fixes #4.

app/src/main/java/info/hebbeker/david/memorex/DisplayHighScore.java

@@ -2,6 +2,10 @@
 
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
+import android.text.Html;
+import android.widget.TextView;
+
+import java.io.Serializable;
 
 public class DisplayHighScore extends AppCompatActivity
 {
@@ -11,5 +15,9 @@ protected void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_display_high_score);
+        final Serializable currentHighScore = getIntent().getSerializableExtra(MainActivity.HIGH_SCORE_DATA);
+        final String aboutText = getResources().getString(R.string.high_score_display, currentHighScore.toString());
+        final TextView textView = findViewById(R.id.textViewHighScore);
+        textView.setText(Html.fromHtml(aboutText));
     }
 }

app/src/main/java/info/hebbeker/david/memorex/HighScoreContainer.java

@@ -57,4 +57,9 @@ private void saveHighScore()
         editor.putString(highScorePreferenceKey, highScoreSerializedObject);
         editor.apply();
     }
+
+    public Score getCurrentHighScore()
+    {
+        return currentHighScore;
+    }
 }

app/src/main/java/info/hebbeker/david/memorex/MainActivity.java

@@ -17,6 +17,7 @@
 
 public class MainActivity extends AppCompatActivity implements GameBoardInterface, View.OnClickListener
 {
+    static final String HIGH_SCORE_DATA = MainActivity.class.getPackage().getName() + "HIGH_SCORE_DATA";
     private final SymbolButton[] symbols = new SymbolButton[4];
     private final Game game = new Game(this, symbols);
     private View startGameButton = null;
@@ -160,6 +161,7 @@ public void run()
     public void showHighScore(@SuppressWarnings("unused") final MenuItem menuItem)
     {
         Intent intent = new Intent(this, DisplayHighScore.class);
+        intent.putExtra(HIGH_SCORE_DATA, highScoreContainer.getCurrentHighScore());
         startActivity(intent);
     }
 

app/src/main/java/info/hebbeker/david/memorex/Score.java

@@ -1,10 +1,12 @@
 package info.hebbeker.david.memorex;
 
+import java.io.Serializable;
+
 /**
  * Does contain information about a score.
  * \todo Add the following attributes: username, speed, date, points
  */
-class Score
+class Score implements Serializable
 {
     /**
      * Completed level.
@@ -26,4 +28,10 @@ boolean isGreaterThan(final Score otherScore)
     {
         return this.level > otherScore.level;
     }
+
+    @Override
+    public String toString()
+    {
+        return "Level=" + level;
+    }
 }

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

@@ -1,8 +1,23 @@
 <?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"
     tools:context="info.hebbeker.david.memorex.DisplayHighScore">
 
+    <TextView
+        android:id="@+id/textViewHighScore"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        android:layout_marginBottom="8dp"
+        android:layout_marginLeft="11dp"
+        android:layout_marginRight="11dp"
+        android:layout_marginTop="8dp"
+        android:autoLink="web|email|map"
+        android:text="@string/high_score_display"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 </android.support.constraint.ConstraintLayout>

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

@@ -12,6 +12,7 @@
     <string name="preference_speed_list" translatable="false">speed_list</string>
     <string name="preference_switch_sound" translatable="false">switch_preference_sound</string>
     <string name="show_high_score">Show high score</string>
+    <string name="high_score_display">Current high score is: %1$s</string>
     <string-array name="pref_speed_titles">
         <item>Slow</item>
         <item>Medium</item>