Android : Proper way override fixed size custom view

I have a custom view with Yellow background. I plan to add a Red background TextView, with match_parent for both width and height on it. Here's what I had done.

MainActivity.java

public class MainActivity extends Activity {

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

        LinearLayout mainView = (LinearLayout)this.findViewById(R.id.screen_main);
        RateAppBanner rateAppBanner = new RateAppBanner(this);
        mainView.addView(rateAppBanner);
    }
}

RateAppBanner.java

public class RateAppBanner extends LinearLayout {

    public RateAppBanner(Context context) {
        super(context);

        setOrientation(HORIZONTAL);

        LayoutInflater.from(context).inflate(R.layout.rate_app_banner, this, true);

        this.setBackgroundColor(Color.YELLOW);
    }
}

rate_app_banner.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <TextView 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textColor="#ffffffff"
        android:background="#ffff0000"
        android:text="Hello World" />

</LinearLayout>

Now, I would like to have a fixed width & height custom view. I realize, after I'm having fixed width & height custom view, the added TextView doesn't obey match_parent attribute.

Here's the change I had done on custom view.

RateAppBanner.java

public class RateAppBanner extends LinearLayout {
    ...

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int desiredWidth = 320;
        int desiredHeight = 50;

        desiredWidth = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, desiredWidth, getResources().getDisplayMetrics());
        desiredHeight = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, desiredHeight, getResources().getDisplayMetrics());

        super.onMeasure(desiredWidth, desiredHeight);
        //MUST CALL THIS
        setMeasuredDimension(desiredWidth, desiredHeight);
    }

I realize the added TextView doesn't match_parent anymore!

Now, we can see the Yellow custom view is having fixed size 320x50. I expect the Red TextView will fill up the entire custom view due to match_parent attribute.

However, that's not the case. I believe my implementation for custom view's onMeasure isn't correct. May I know what is the correct way to fix this?

The complete source code can be downloaded from abc.zip