Been lost :( my text Answer in emulator is always transparent and cannot animate.

private CrystalBall mCrystalBall = new CrystalBall();
private TextView mAnswerLabel;
private Button mGetAnswerButton;
private ImageView mCrystalBallImage;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Assign the Views from the layout file
    mAnswerLabel = (TextView) findViewById(R.id.textView1);
     mGetAnswerButton =  (Button) findViewById(R.id.button1);
     mCrystalBallImage = (ImageView) findViewById (R.id.imageView1);

    mGetAnswerButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            String answer = mCrystalBall.getAnAnswer();


            // Update the label with our dynamic answer 
            mAnswerLabel.setText(answer);

            animateCrystalBall();
            animateAnswer();
            playSound();
        }
    });
}

private void animateCrystalBall (){
    mCrystalBallImage.setImageResource(R.drawable.ball_animation);
    AnimationDrawable ballAnimation = (AnimationDrawable) mCrystalBallImage.getDrawable();
    if (ballAnimation.isRunning()) {
        ballAnimation.stop();
    }
    ballAnimation.start();
}

private void animateAnswer () {
    AlphaAnimation fadeInAnimation = new AlphaAnimation (0 , 1);
    fadeInAnimation.setDuration(1500);
    fadeInAnimation.setFillAfter(true);

    mAnswerLabel.setAnimation(fadeInAnimation);
}

private void playSound(){
    MediaPlayer player = MediaPlayer.create(this, R.raw.crystal_ball);
    player.start();
    player.setOnCompletionListener( new OnCompletionListener() {

        @Override
        public void onCompletion(MediaPlayer mp) {
            mp.release();

        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

<ImageView
    android:id="@+id/imageView1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:scaleType="fitCenter"
    android:src="@drawable/ball01" />

<Button
    android:id="@+id/button1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:background="@android:drawable/btn_default"
    android:text="Enlighten me!" />

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerVertical="true"
    android:weightSum="1" >

    <View
        android:id="@+id/view1"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="0.2" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="0.6"
        android:textSize="32sp" />

    <View
        android:id="@+id/view2"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:layout_weight="0.2" />

</LinearLayout>