Java

In MainActivity.java, implement a method public void resetAction(View view) which will serve as a listener for the reset button. This method should make the appropriate method calls( reset() in TwentyFortyEight ) to reset both the visible game board and the internal game board in TwentyFortyEight.java.

import javax.swing.*; import java.awt.event.* import android.net.wifi.p2p.WifiP2pManager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.content.Context; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.GridView; import android.widget.TextView;  public class MainActivity extends AppCompatActivity { //The context of the app. Context is used to refer to certain resources of the app outside of  //the MainActivity class  private static Context mContext;  public static Context getAppContext() { return mContext; }  private TwentyFortyEight twentyFortyEight;  private CustomGrid customGrid;  private TextView scoreBox;  protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = getApplicationContext(); twentyFortyEight = new TwentyFortyEight(4); customGrid = new CustomGrid(); GridView grid = (GridView) findViewById(R.id.mainGrid); scoreBox = (TextView) findViewById(R.id.scoreBox); grid.setAdapter(customGrid); //first starts   twentyFortyEight.reset(); } /**  * Method invoked when the Up button is pressed  *  * @param view - the UI of the app  */  public void upAction(View view) { while(twentyFortyEight.moveUp()){twentyFortyEight.placeRandom();} customGrid.updateGrid(twentyFortyEight.getBoard()); scoreBox.setText(String.valueOf(twentyFortyEight.getScore())); //the score from your TwentyFortyEight  //NOTE: You should pass the String value of score to setText. Eg. scoreBox.setText(String.valueOf(twentyFortyEighty.getScore()));  } /**  * Method invoked when the Down button is pressed  *  * @param view - the UI of the app  */  public void downAction(View view) { while(twentyFortyEight.moveDown()){twentyFortyEight.placeRandom();} customGrid.updateGrid(twentyFortyEight.getBoard()); scoreBox.setText(String.valueOf(twentyFortyEight.getScore())); //the score from your TwentyFortyEight   //NOTE: You should pass the String value of score to setText. Eg. scoreBox.setText(String.valueOf(twentyFortyEighty.getScore()));  } /**  * Method invoked when the Left button is pressed  *  * @param view - the UI of the app  */  public void leftAction(View view) { while(twentyFortyEight.moveLeft()){twentyFortyEight.placeRandom();} customGrid.updateGrid(twentyFortyEight.getBoard()); scoreBox.setText(String.valueOf(twentyFortyEight.getScore())); //the score from your TwentyFortyEight   //NOTE: You should pass the String value of score to setText. Eg. scoreBox.setText(String.valueOf(twentyFortyEighty.getScore()));  } /**  * Method invoked when the Right button is pressed  *  * @param view - the UI of the app  */  public void rightAction(View view) { while(twentyFortyEight.moveRight()){twentyFortyEight.placeRandom();} customGrid.updateGrid(twentyFortyEight.getBoard()); scoreBox.setText(String.valueOf(twentyFortyEight.getScore())); //the score from your TwentyFortyEight   //NOTE: You should pass the String value of score to setText. Eg. scoreBox.setText(String.valueOf(twentyFortyEighty.getScore()));  } public void resetAction(View view){ //To do } } 

<TextView  android:background="@drawable/option_box"  android:text="Reset"  android:layout_height="30dp"  android:layout_width="100dp"  android:textAlignment="center"  android:textSize="20dp"  android:paddingTop="3dp"  android:textColor="#ffffff"  android:id="@+id/resetBox"  android:layout_below="@+id/titleBox"  android:layout_toEndOf="@+id/scoreBox"  android:onClick="resetAction"/>