Why are the 2 choice buttons in the story activity invisible and do nothing when tapped?

// title option when creating a new activity only matters when we're running the action bar

// Convention for TAG
public static final String TAG = StoryActivity.class.getSimpleName();
private Story mStory = new Story(); // need to load a page when 1) the activity is created
                                    //                          2) and when a button is tapped on
private ImageView mImageView;
private TextView mTextView;
private Button mChoice1;
private Button mChoice2;
private String mName;
private Page mCurrentPage;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_story);

    Intent intent = getIntent();  // returns the intent that started this activity
    String mName = intent.getStringExtra(getString(R.string.key_name));  // pass in key we used
                                                   // key must be the same name we used to start this activity


    if (mName.length() == 0) {
        mName = getString(R.string.default_name);
    }

    Log.d(TAG, mName);
    Toast.makeText(StoryActivity.this, "Hi " + mName, Toast.LENGTH_SHORT).show();

    mImageView = (ImageView) findViewById(R.id.storyImageView);
    mTextView = (TextView) findViewById(R.id.storyTextView);
    mChoice1 = (Button) findViewById(R.id.choiceButton1);
    mChoice2 = (Button) findViewById(R.id.choiceButton2);

    loadPage(0);
}

private void loadPage(int choice) {
    mCurrentPage = mStory.getPage(choice);

    Drawable drawable = getResources().getDrawable(mCurrentPage.getImageId());
    // getResources() --> We get the resources for the project through the activity
    // getDrawable() --> And from those resources we are getting a drawable type
    // pate.getImageId() --> then we are passing in this specific ID of the drawable that we want to get
    mImageView.setImageDrawable(drawable);
    // Once we have that drawable we set it as the image drawable for our ImageView

    String pageText = mCurrentPage.getText();
    // Add the name if placeholder included. Won't add if no placeholder (text already has appropriate      //characters needed)
    // %1 = order number of the parameter (we only have 1 parameter so it's just going to be %1
    // NOTE: If we wanted to replace more than 1 thing we could use different numbers instead of 1
    // $s is just for a simple string
    // pageText = String.format(pageText, mName);
    pageText = String.format(pageText, mName);
    mTextView.setText(pageText);

    mChoice1.setText(mCurrentPage.getChoice1().getText());
    // getChoice1() returns a choice object which we can use to get the text
    mChoice2.setText(mCurrentPage.getChoice2().getText());

    mChoice1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // need to get index of new page we want to load
            int nextPage = mCurrentPage.getChoice1().getNextPage();
            loadPage(nextPage);
        }
    });

    mChoice2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int nextPage = mCurrentPage.getChoice2().getNextPage();
            loadPage(nextPage);
        }
    });
}

<ImageView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/storyImageView"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:src="@drawable/page0"
    android:scaleType="fitXY"
    android:adjustViewBounds="true"
    />

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/stopAndInvestigate"
    android:id="@+id/storyTextView"
    android:layout_below="@+id/storyImageView"
    android:layout_alignLeft="@+id/storyImageView"
    android:layout_alignStart="@+id/storyImageView"
    android:paddingLeft="30dp"
    android:paddingRight="30dp"
    android:paddingTop="15dp"
    android:lineSpacingMultiplier="1.2"/>

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/choiceButton1"
    android:id="@+id/choiceButton1"
    android:background="#ffffffff"
    android:textColor="#ff3a8aec"
    android:layout_above="@+id/choiceButton2"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"/>
    <!-- android:style="@style/whiteButton" -->

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="@string/choiceButton2"
    android:id="@+id/choiceButton2"
    android:background="#ffffffff"
    android:textColor="#ff3a8aec"
    android:layout_alignParentBottom="true"
    android:layout_alignLeft="@+id/storyTextView"
    android:layout_alignStart="@+id/storyTextView"/>