Android: Show a Canvas on a View

I am trying to create a Canvas, draw stuff on it, and then show it on a View. My code below runs with no errors, but the Canvas doesn't show. All I see is a blank, black screen.

I know there are other ways to do this example, but what I am actually trying to do is draw a bunch of stuff on the Canvas, show it, draw more stuff on the Canvas, show it, etc....

I am very new to Android. I have tried to look, but haven't been able to find any simple solution [simple for me :)]

MainActivity.java

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);     

        //Get screen size. THIS WORKS; when I log the output it's correct.
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);

        //Create Canvas.
        Bitmap bmp = Bitmap.createBitmap(size.x, size.y, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bmp); 
        /*
        I know the Canvas is created, because when I call
            canvas.getWidth() and canvas.getHeight()
        I get the correct pixel size of the device; i.e.
        (same as size.x and size.y respectively).
        */

        canvas.drawColor(Color.WHITE);
        //Draw other stuff on the canvas.
        View v = findViewById(R.id.view);
        v.draw(canvas);
        /*
        I know v is working because when I call
            v.setBackgroundColor(Color.RED);
        The whole screen is red.
        */
    }
}

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="${relativePackage}.${activityClass}" >

    <View
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/view" />

</RelativeLayout>

I don't know if this is necessary, but just in case:

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="main.stupidbird"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="17"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" android:persistent="true">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" 
            android:theme="@android:style/Theme.NoTitleBar.Fullscreen" 
            android:screenOrientation="landscape" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>