I can't press the choice Button when I am testing the app

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

private Story mStory = new Story();
private ImageView mImageView;
private TextView mTextVeiw;
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);
    mTextVeiw =(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());
    mImageView.setImageDrawable((drawable));

    String pageText = mCurrentPage.getText();
    // add the name if placeholder incluide, won't add if no placeholdr
    pageText = String.format(pageText, mName);

    mTextVeiw.setText(pageText);

    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);
        }
    });

}

<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" />

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Continue Home to Earth"
    android:id="@+id/choiceButton1"
    android:layout_above="@+id/choiceButton2"
    android:layout_alignLeft="@+id/choiceButton2"
    android:layout_alignStart="@+id/choiceButton2"
    android:background="@android:color/white"
    android:textColor="#ff3a8aec" />

<Button
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Stop and investigate"
    android:id="@+id/choiceButton2"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:background="@android:color/white"
    android:textColor="#FF3A8AEC" />

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="You continue your course to Earth. Two days later, you receive a transmission from HQ saying that they have detected some sort of anomaly on the surface of Mars near an abandoned rover. They ask you to investigate, but ultimately the decision is yours because your mission has already run much longer than planned and supplies are low."
    android:id="@+id/storyTextView"
    android:layout_below="@+id/storyImageView"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:paddingLeft="30dp"
    android:paddingTop="15dp"
    android:paddingRight="30dp"
    android:lineSpacingMultiplier="1.2" />