两种布局方法和两种绘画图像

public class Main extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main); // 方法一：调用布局文件main.xml
//        TextView tv=new TextView(this);
//        tv.setText("dsdfsdfsdfsdf");
//        setContentView(tv); //方法二：通过对象来布局
//        MyView mv=new MyView(this);
//        setContentView(mv);‍//方法二：通过对象来布局
}
public class MyView extends View{
public MyView(Context context) {
   super(context);
   // TODO Auto-generated constructor stub
  
}
   public void onDraw(Canvas canvas){
    Paint paint=new Paint();
    paint.setColor(Color.RED);
    paint.setTextSize(20);
    paint.setStyle(Style.STROKE);
    canvas.drawCircle(260, 110, 40, paint);  
//    InputStream is=getResources().openRawResource(R.drawable.icon); //方法一：通过流来绘画
//    Bitmap bitmap=BitmapFactory.decodeStream(is);
new BitmapFactory();    // 方法二：直接来绘画
    Bitmap bitmap=BitmapFactory.decodeResource( getResources(),R.drawable.icon);
    canvas.drawBitmap(bitmap, 0,0,null);
    }
}