自定义VIEW，加载出错，求指点解决思路

public class RotateView extends View {    Bitmap userBmp;    Matrix matrix;    public RotateView(Context context) {        super(context);        init();    }    public void init()    {        userBmp=BitmapFactory.decodeResource(getResources(), R.drawable.user);        matrix=new Matrix();        matrix.postRotate(15);        matrix.postScale(2f, 2f);        matrix.postTranslate(100f, 100f);    }    @Override    protected void onDraw(Canvas canvas) {        init();        super.onDraw(canvas);        canvas.drawBitmap(userBmp, matrix, null);    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    >    <lc.android.rotateViewTest.RotateView         android:id="@+id/rv"        android:layout_width="fill_parent"         android:layout_height="fill_parent"        /></LinearLayout>

public class RotateViewTestActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.view2main);    }}