Error in StoryActivity for Interactive Story. Not sure how to fix the error.

public static final String TAG = StoryActivity.class.getSimpleName();

private Story mStory = new Story();
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();
    mName = intent.getStringExtra(getString(R.string.key_name));
    if (mName == null) {
        mName = "Friend";
    }
    Log.d(TAG, mName);

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

    loadPage(0);


}

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

    Drawable drawable = getResources().getDrawable(mCurrentPage.getImageId());
    mImageView.setImageDrawable(drawable);


    String pageText = mCurrentPage.getText();
    // Add the name if placeholder included. Won't add if no placeholder
    pageText = String.format(pageText, mName);
    mTextView.setText(pageText);

    if (mCurrentPage.isFinal()) {
        mChoice1.setVisibility(View.INVISIBLE);
        mChoice2.setText("PLAY AGAIN");
        mChoice2.setOnClickListener(new View.OnClickListener() {
            @Override
             public void onClick(View v) { finish(); }
        });

    }
    else {
        mChoice1.setText(mCurrentPage.getChoice1().getText());
        mChoice2.setText(mCurrentPage.getChoice2().getText());

        mChoice1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                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);
            }
        });
    }
}